Fm8700 Sme A
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MARINE VHF RADIOTELEPHONE MODEL
FM-8700
c
FURUNO E L E C T R I C C O., LT D.
Yo u r L o c a l A g e n t / D e a l e r
9-52, Ashihara-cho, Nishinomiya, Japan 662 Te l e p h o n e : Te l e f a x :
0798-65-2111 0798-65-4200
FIRST EDITION : AUG 1998 All rights reserved.
Printed in Japan
PUB. No. SME-56170-A (KAOK)
FM-8700
CONTENTS Chapter 1 BLOCK DESCRIPTION
1.1 General
1-1
1.2 Input/output data format of FM-8700
1-2
1.3 DX-8700 input/output signals
1-4
1.4 Main function of PC boards
1-6
1.5 Block description
1-9
1. DX-8700 antenna system
1-9
2. DSC Receiver section
1-10
3. Transmitter section
1-11
4. Receiver section
1-13
5. Controller section
1-15
6. Power supply section
1-19
7. IF-8500 (Printer interface)
1-20
Chapter 2 Location of Parts
1. Control Panel
2-1
2. Rear Panel
2-1
3. Bottom View, Cover removed
2-2
4. CONTROL Board
2-2
5. Bottom View (CONTROL Board and the removed)
2-3
6. Panel
2-3
7. Duplexer (DX-8700)
2-4
Chapter 3 Change of System Setting 3.1 Outline of system setting
3-1
3.2 Change operation to normal mode or test mode
3-2
3.3 Change of system setting
3-4
1. Setting DSC (Selection of receiver)
3-4
2. Setting RT (Function of VHF section)
3-6
3. Setting CH (Channel presetting)
3-8
4. Setting PO (Setting transmitting power)
3-10
5. Setting L (Selection LCD display, Japanese and English)
3-12
3.4 Change of jumper setting
3-13
3.5 Confirmation of ID number
3-14
3.6 Changing ID number and ON/OFF of Private mode
3-15
Chapter 4 Adjustment and Measurement 4.1 Transmitting frequency and power
4-1
4.2 Measurements on CH70
4-2
1. Mode change 4.3 Other measurements
4-3 4-6
1. Confirmation of receiver sensitivity
4-6
2. Confirmation of transmitting modulation degree
4-7
3. Confirmation of receiving sensitivity of CH70 RX board
4-8
Chapter 5 Maintenance check 5.1 Periodical check
5-1
1. Cleaning of display portion
5-1
2. Check of loose connectors
5-1
3. Antenna
5-1
5.2 Everyday oprational test (Self-test)
5-2
5.3 Exchanging the nickel-cadmium battery
5-5
5.4 Exchanging ROM
5-6
5.5 About NMI switch
5-8
Chapter 6 Troubleshooting 6.1 Functional tests
6-1
1. RAM/ROM test
6-2
2. Remote line test
6-3
3. Keyboard test
6-4
4. Display (LCD) test
6-4
5. Printer test
6-5
6.2 Error messages
6-6
1. CPU communication errors
6-6
6.3 Confirmation by line monitor
6-7
6.4 Guidelines for troubleshooting
6-8
6.5 Board compatibility
6-11
Specifications
AP1-1
Private Channel List
AP2-1
Mechanical Parts List
M-1
Schematic Diagrams
S-1
Chapter 1 1.1
BLOCK DESCRIPTION
General
FM-8700 is a full-duplex international VHF radio-telephone which includes a VHF DSC function and a VHF watch receiver. The system consists of a transmitter- receiver unit and a duplexer unit, operating from DC 24 V (+30%, -10%) power supply. External devices such as remote station (RB-700), distress message controller (DMC-5), printer, navigation device (outputs location and time data in NMEA format), wing handset, and external speaker can be connected to this system. If a printer is used, a printer interface unit (IF-8500) is required. The system connection diagram is shown below. Operational Priority 1. DMC-5 2. FM-8700 3. RB-700 *
* CH70RX NMEA
ANT
*
Navigation Device
DX-8700 *
Wing Handset (port)
*
Wing Handset (Starboard)
*
Distress Message Controller (DMC-5)
*
Printer Interface (IF-8500)
W-HANDSET
TX ANT RX ANT W-HANDSET NMEA Handset Hanger (HSC701K-BX21)
HANDSET
DMC
FM-8700 EXT Speaker *
PRINTER
EXT SPKR
* Remote Station * (RB-'700) NOTE) DB-500 is required when additional RB-700(s) is connected.
Printer
REMOTE POWER
*
AC100/220VAC AC/DC Power supply unit (PR-300/240)
DC24V + 30 , -10% (7A MAX)
DC24V + 30 , -10% (7A MAX)
Note) *:operational Fig. 1-1
System Configuration
1-1
1.2 Input/output data format of FM-8700 The designation of connectors for the input-output signals and their electrical specifications are shown below. CH70 RX ANT (RX ANT)
ANT (TX ANT)
REMOTE BREAKER
EXT SP
16P
ð 24V DC
1 2
GND
Fig.1-2
ð
ð
7P
6P
NMEA
DMC
ð 4P
8P
PRINTER
HANDSET
WING HANDSET
Layout of the connectors on the rear panel of FM-8700 Table 1-1/2
Connector Name
Connector type
TX ANT
M-R type
50 Ω
RX ANT
M-R type
50 Ω
24V DC
HS16R-2
Pins
Signal
Remarks
1. +24V 24V+30,-10% 2. –24V 1. 0V 2. PTT SW 3. MIC (H) Main Handset
FM-10RS-6H
-46dBm (600 Ω)
4. MIC (C)
0dBm (200 Ω)
5. HS SP (H) 6. HOOK SW 1. 0V
GND
2. W-PTT SW
Wing Handset
RS-410N
3.W-MIC
-46dBm (600 Ω) or 0dBm (40 Ω)
4. W-SP
1mW (200 Ω)
FM214-7SM
Open collector Part and starboard microphones are connected in parallel. Microphone type, carbon or dynamic must be selected on FM-8700.
5. T15V (TX) 6. +15V 7. DUP/SIMP
RS-410N
8. 0V
1-2
Open collector
Table 1-2/2 Terminal
Connector
Pin Description
Signal
Remarks
1. TXD (H) NMEA 2. TXD (C)
IEC1162-1 (ZDA, GLL, RMC)
3. RXD (H) NMEA NMEA
FM214-7SM
4. RXD (C) 5. CH70RX (H) 6. CH70RX (C)
0dBm (600 Ω)
7. POW 1. TXD (H) 2. TXD (C) MIF 3. RXD (H) DMC
FM214-6SM 4. RXD (C) 5. F-GND 6. ALM 1. TXD (H) 2. TXD (C)
PRINTER
FM214-4SM
MIF 3. RXD (H) 4. RXD (C) 1. TXD (H) 2. TXD (C) MIF 3. RXD (H) 4. RXD (C) 5. F-GND 6. 15V
1A MAX
7. NC REMOTE
SRCN-16P
8. NC 9. 0V 10. LINE OUT (H) 11. LINE OUT (C) 12. LINE IN (H) 13. LINE IN (C) 14. TX KEY
0dBm (600 Ω) 0dBm (600 Ω) RS-410N
15. NC 16. NC
1-3
Open collector
1.3
DX-8700 input/output signals
The logout of the connectors on the DX-8700 and its specifications are shown below.
WING HANDSET
TX IN
~
WING HANDSET
Fig.1-3
CH70 RX ANT
ANT
FM-8700 Connectors
NMEA
~
NMEA
RX OUT
Connectors on DX-8700
Table 2-1/2 Connector Name
Connector type
ANT
M-R type
50 Ω
CH70 RX ANT
M-R type
50 Ω
TX IN
M-P type
50 Ω
RX OUT
M-P type
50 Ω
Pins
Signal
1. 0V
Remarks
Signal GND
2. W-PTTSW
-46dBm (600 Ω) or 0dBm (40 Ω)
3. W-MIC
Wing Handset
FM14-7P
Part and starboard microphones are connected in parallel. Microphone type, carbon or dynamic must be selected on FM-8700.
0dBm (200 Ω)
4. W-SP 5. T15V (TX) 6. +15V 7. DUP/SIMP
RS-410N
8. 0V
Signal GND
9. F-GND
1-4
Open collector
Table 2-2/2 Connector Name
Connector type
Pins
Signal
1. 0V
GND
2. W-PTT SW
RS-410N
-46dBm (600 Ω) or 0dBm (40 Ω)
3. W-MIC
Wing Handset
Terminal Board
Remarks
Open collector Part and starboard microphones are connected in parallel. Microphone type, carbon or dynamic must be selected on FM-8700.
1mW (200 Ω)
4. W-SP 5. F-GND 6. TXD (H) 7. TXD (C)
NMEA
IEC1162-1 (ZDA, GLL, RMC)
NMEA
IEC1162-1 (ZDA, GLL, RMC)
8. RXD (H) 9. RXD (C) 10. F-GND 1. TXD (H) 2. TXD (C) 3. RXD (H) NMEA
FM14-8P
4. RXD (C) 5. CH70 RX (H) 6. CH70 RX (C) 7. POW 8. F-GND
1-5
0dBm (600 Ω)
1.4 Main functions of PC-boards The system block diagram of FM-8700 and DX-8700 is shown in Fig.1-4. The main functions of each PC-board are shown in Table 3 on the following pages. EXT SP
MODE/CH SW AF VR
SQ VR
SP SW
AUTO/ SCAN /DW/OFF
RX Freq, CONT DATA INT SP
DUP/SIMP SQ DET/SIG LINE MON
RX PCB (05P0672)
RX OUT
PANEL PCB (05P615) * LCD/LED/KEY
CONTROL PCB (05P0616A)
LINE OUT
9V
TX9V
HS SP TX VHF CPU : V25 +15V DSC CPU : H8
TX Freq DATA
MODEM
POWER CONT
TX PCB (05P0618A)
TX OUT
FM-8700
POWER DET
+15V
MOD
SW
+15V (RX PCB) +15V Braker : 10A
REMOTE
W-HANDSET
PRINTER DMC
+24V
MIC, SP, PTT SW, HOOK SW
T/RD
W-MIC, SP, W-PTT, +15V, DUP/SIMP ,TX
T/RD, CH70RX, POW
NMEA
NMEA WING HANDSET
TX IN
RX OUT
CH70RX ANT ANT
T/RD, +15V, LINE IN/ OUT, TX KYE
FILTER PCB (05P0673)
+15V
T/RD, ALARM
POWER PCB (05P0617)
HANDSET 24V DC
HANDSET
(DC24V)
RB-700 DMC-5 TB-1
PRINTER I/F (IF-8500)
D-TX
D-ANT
CH70 RX ANT
CH70 RX PCB (05P0675) D-RX
ANT
PRINTER (PP-510)
DUPLEXER DC24V
DX-8700
NBDP MF/HF DSC
NMEA
VHF DSC
WING HANDSET (Both wings, Parallel Connection)
Fig.1-4
BLOCK DIAGRAM
1-6
PRINT DATA
FM-8700 Main PC-boards of FM-8700 and their functions are shown in the table below. Table 3-1/2 PC-boards
FM8700
Main functions and Circuits
TX (05P0618 A)
Contains circuits for transmitting modulator, local oscillator, power amplifier, and delivers 25/1W outputs every 25 kHz step at 155.0 - 156.475 MHz. 1 A local oscillator circuit for transmission (synthesizer PLL) 2 A reactance modulator (G3E, G2B) and its amplifier 3 A transmission power amplifier and a transmission power controller
RX (05P0672)
Consists of a double-super heterodyne receiver circuit at 155.0 - 166.075 MHz, (receiving sensitivity; 20 dB, SINAD; less than 0 dB, first IF; 21.4 MHz, second IF;455 kHz). 1 First local oscillator circuit (synthesizer PLL: 21.4 MHz) 2 Second local oscillator circuit (crystal-control; 20.945 MHz) 3 Squelch circuit (controlled by carrier detection and sound detection) 4 AF power amplifier circuit (8 Ω, 3W output with 10% distortion)
CONTROL (05P0616 A)
Includes CPU for VHF, CPU for DSC, MODEM, ROM, EEROM and I/O. VHF and remote control with VHF CPU (µPD70320GJ : V25) DSC function with DSC CPU (HD6475328CP : H8) and MODEM TX AF monitor control circuit and TX AF LINE input signal selection circuit
FILTER (05P0673)
Consists of filter circuits for connected signal lines.
PANEL (05P0615)
POWER (05P0617)
1 2 3
LCD drive circuit (for DSC) LED drive circuit (for VHF) Keyboard circuit
Generates 15V output by series power supply circuit from DC 24V input. 1 Over voltage protection: +32 V and low voltage detection: +20 V 2 Temperature detection sensor mounted on U2 * gradually decreases the transmitting power by detecting a temperature from 70 to 80 °C.
1-7
DX-8700 Main PC-boards of DX-8700 and their functions are shown in the table below. Table 3-2/2 PC-boards
Main functions and Circuits
Duplexer (05P0674)
Consists of filters for duplex operation. 1 Transmitting filter: BEF characteristics with three stagger cavities. (156.0 - 157.5 MHz, the power loss; less than 1.4 dB) 2 Receiving filter: BEF characteristics by four stagger cavities. (160.6 - 162.1 MHz, the power loss; less than 1.6 dB)
CH70 RX (05P0675)
Consists of a double-super heterodyne receiver circuit used exclusively for nonintermittent listening to DSC CH70 (156.525 MHz).Receiving sensitivity; 20 dB, SINAD; less than 0 dB, the first IF; 16.9 MHz, the second IF; 455 kHz 1 First local oscillator circuit (crystal-control; 139.625 MHz) 2 Second local oscillator circuit (crystal-control; 16.455 MHz) 3 DUP/SIMP switching circuit (relay control) 4 Connecting terminals for WING HANDSET and NMEA 5 Selection of receiving antenna for CH70 (by changing antenna wiring)
DX8700
1-8
1.5
Block description
1. DX-8700 antenna system
CH70 RX ANT
CH 70 ANT
K4 (CR1)
TX IN
Q1, 2
T1
J5
J6
Deviser Tx
Rx Q3, 4
Duplexer
Dup TX Dup
Dup K3
RX OUT +15V
K1 Simp K4
K1
K2
K3
DUP/SIP Dup ANT
Dup
CH 70 RX AF (DSC RX Signal)
Simp
Dup RX
TR ANT
CH70 RX
W5
Simp
DUP/SIP TX
Q5 K2
TR ANT
C35
CR4 DET
Fig.1-5
U1 (2/2) Buff
TX level monitor signal
POW
DX-8700 Antenna System
DX-8700 consists of CH70 RX board (05P0675) and Duplexer (05P0674). The CX70 RX circuit contains an antenna switching circuit and CH70 RX circuit. K1 - K3 are relays. The antenna is selected by DUP/SIMP control signal from the main unit. The transmitting signal output from the main unit is input to and switched by K4. The TR ANT antenna can transmit/receive VHF signals and receive CH70 signal. When a CH70 receiving antenna is used, is internally connected to "CH70 RX circuit, J6" with a coaxial cable.
1-9
2. DSC Receiver section
DX-8700 CH70 RX ANT CH70 RX SIMP RX Q1, 2
T1
J5
J6
DEVISER
W5
Q3 ,4
DUP RX
(2SK937-Y5-AA)
U3
FL1
(GN2011)
FL2
(2SK937-Y5-AA)
156.525MHz
Q13
FL3
16.9MHz(3SK302GR)
U2 (1/2)
455kHz
139.625MHz
TP1
×4
S D
Q12
DET
(3SK302GR)
(2SK937-Y5-AA)
TR ANT
Q11
OSC
U4 (MC3361CD)
Q15 TP2
(2SC3123)
K3
(NJM2094M)
OSC Q14
Y2
(2SC3123)
16.445MHz
Y1 34.90625MHz
CH70 RX (05P0675)
C73
RX OUT CH70 RX AF (0dBm 600 Ω)
FM-8700
U31-2/4
U30-2/4
U29
MODEM CH70 1200
(NJM3403AV) (MSM6927GS-2K)
U14
U2 (VHF)
CPU (H8 : HD6475328CP)
U3 (DSC)
PIO
CPU
(µPD71055GB)
(V25: µPD70320GJ)
CONTROL (05P0616A)
Fig.1-6
CH-70 Receiving Signal Flow
The receiver for CH70 (156.525 MHz) is included in DX-8700. CH70 signal is received by either of a dedicated receiving antenna (CH70 RX ANT) or a transmitting-receiving antenna (TR ANT). The internal circuit connection must be changed in accordance with the equipped antenna. The input signal from TR ANT (SIMP RX) is amplified by Q1 and Q2 (preamplifiers) so as to adjust it to the same level as the input from CH70 RX ANT. The gain from Q1, 2 to J5 is more than 0 dB. The input signal to CH70 RX circuit is amplified by Q11, passed through FL1 (156.525 MHz), mixed with the 139.625MHz local oscillator output in U3, and converted to the first IF signal of 16.9 MHz. Then, after passing through Q12, FL2, and Q3, the signal is converted to the second IF signal of 455 kHz by mixing with the 16.9MHz second local oscillator output, and input to CONTROL board in the main unit as CH70 RX AF signal. This signal (VHF DSC signal) is decoded in the CONTROL board.
1-10
3. Transmitter section Transmitting AF circuit FILTER PCB (05P0637) U31-4/4
MIC SELECT Wing - MIC
(-46dBm) MIC
U32-1/4 R127 J406-9/8 W HS
U32-2/4
0dBm
U32-4/4
T1 J404-7/8
MOD IN J407-1/2 MOD (-26dBm 600 Ω )
MIC
TX PCB (05P0618A)
REMOTE R156
REMOTE
U32-3/4
(DSC MSG) U 29 MODEM
MODEM R155
U30-1/4
Operational Priority: 1. DSC call 2. Wing handset 3. FM-8700 4. REMOTE (RB-700)
LINE MON
U30-3/4
R154
J406-3/4 HS
(600 Ω )
Wing - MIC R153
JP2 D
-46dBm (600 Ω )
REMOTE
RX PCB (05P0672)
J408-5
C
Note) 0dBm
LINE MON
DSC
U2 VHF CPU
CONTROL. etc
CONTROL PCB (05P0616A)
U3 DSC CPU
Note) • 0dBm: Carbon Microphone (40 Ω ) • -46dBm: Dynamic Microphone (600 Ω )
Fig.1-7
AF Signal in Transmitter
Audio signals from the wing handset, remote station (RB-700), and handset of the main unit are input to CONTROL board through FILTER board. Either carbon microphone or dynamic microphone can be used for the wing handset. When a microphone is installed, the jumper wire JP2 is set in accordance with the specification of the microphone. Transmitter VHF DSC messages are converted to AFSK (1700 ± 400 Hz) by U29 (MODEM). The audio signals and the AFSK signal are sent to TX board as signal through analog switches in U32, R132 – 135, and U30. The rated input level of the AF signal is -26 dBm (600 Ω).
1-11
Transmitting circuit
CR11
(UNLOCK -- OFF)
(To CONTROL PCB)
TX PLL LOCK DET TX PLL Frq. DATA
From CONTROL PCB
LD
J102-6/7/8
J102-5
PLL
(SCK, SDA, LE)
U5 (PLL2001S)
Y1: 8.000MHz
FIN
C76
MOD IN (-26dBm 600 Ω ) From CONTROL PCB
PA Pre-Emphasis J101-1/2 R79
PLL FIL
Limitter (LPF)
Drive
M57710A
LPF
TX OUT
VCO R78, C96 U6-1/4
U6-2/4
U6-3, 4/4
R64
Q5/6
Q7
Q1/2
Power DET
U1
(To DX-8700)
U2-1/2, CR6
MIC
MOD
PWR CONT Q3, U2/7
TX PCB (05P0618A) J102-1/3 PWR CONT TX PLL Frq. DATA
(To TX PCB)
(SCK, SDA, LE)
From CONTROL PCB
Fig.1-8
TX PLL LOCK DET
J102-1
PWR DET
D/A A/D
U2: CPU
CONTROL PCB (05P0616A)
Transmitter Circuit
AF signal from CONTROL board, signal, passes through R79 (MIC), preemphasis (R78, C96), limiter, LPF, and R64 (MOD), then inputs to VCO. R79 (MIC) adjusts the frequency deviation to ±3 kHz with a rated microphone input of 46 dBm. R64 (MOD) adjusts the maximum frequency deviation to ±5 kHz or less for an excessive microphone input of –26 dBm. The PLL circuit, consisting of U5, PLL FIL, and VCO (8 MHz reference oscillator) can deliver an output every 25 kHz step in a frequency range from 155.500 to 161.475 MHz. C76 adjusts the transmitting frequency deviation to ±300 Hz. (The specification is ±10ppm.) The AF signal is frequency-modulated (reactance modulation: G3E, G2B) by applying the signal to a variable capacitor diode in VCO. CR11, unlock detector of the PLL circuit, illuminates when the circuit is operating normally. The output from the VCO is amplified by Q5, Q6, Q1, Q2, and a power module (M57710A) in U1 to approximately 25 W. The amplified signal then passes through LPF and comes out as the transmitting output from the main unit. To control the transmitting power, a signal is generated by detecting the transmitting output and sent to CONTROL board. There, the signal is processed by VHF CPU to signal, which controls the output of power module U1. The transmitting output power is adjusted in power adjustment mode with six waves – CH60, 14, 88 of DUP and SIMP waves – and the respective power data is stored in the memory.
1-12
4. Receiver section Receiving circuit
RX IN
U1 (GN2011)
Q1
J9
Q2
FL1
Q3
LINE U4
FL2
TP3 A
DET (BPF)
(3SK302GR)
(2SK937-Y5-AA)
(BPF)
21.4MHz (3SK302GR)
455kHz
OSC
Fr-21.4MHz
(UNLOCK- OFF) CR2
U2 (MC3361CD)
Q6
U10
R34 (NJM4558M)
Noise AMP
(2SC3123)
RX PLL LOCK DET
LD
TP2
FIN
DET U3/4 CR1
Q4/5
LOOP FIL
RX PLL Frq. DATA
PLL
Y1
VCO
(PLL2001S)
20.945MHz
(SCK, SDA, LE)
SQ DET 8.000MHz
Y2
RX PLL LOCK DET
B
C95
CONTROL (05P0616A)
RXA
U11
U5
Q1 SDA Q2 SCK Q3 Q4
SCK, SDA, LE
MUTE
SQ SIG
SQ SIG
LINE MON
LINE MON EXT SP
SP ON
AF VOL
TX ON
Q5 Q6
DUP/SIMP
A
U8
U6
U6
U9: AFP
U8
VOL OUT (TDA2003H)
Q7 Q8
BEEP
MUTE
(M54972P)
R48
SP ON
U8
SP
U8 BEEP MAX
B
U7 U7
RX (05P0672)
Fig.1-9
BEEP HS SP
Handset SP
HS SP
T2 LINE OUT
REMOTE
LINE OUT
Reciver Circuit
The receiver input signal from DX-8700 is input to J9 of RX board, amplified by Q1, and converted to the first IF signal of 21.4 MHz in U1. CR2, unlock detecter of the PLL circuit, illuminates when the PLL circuit is operating normally. The first IF signal is passed through FL1 (21.4 MHz) and Q3, and input to U2 (MC3361CD). In U2 the signal is converted to the second IF signal and demodulated. R34 "LINE" adjusts the output from U2 so that the output level from U4 at TP3 becomes 0.2 Vrms when a receiving signal of 60 dBµ with 1 kHz modulation and ∆f of 3 kHz comes in. signal from U3 is used for detecting the carrier for SQ control and signal from U5 is for detecting the audio signal for SQ control. Both signals are input to CPU for VHF (U2) on CONTROL board. The SQ control is operated by controlling U8 with signal.
References) • Built-in speaker • Handset speaker • Sensitivity • Squelch tight level
: : : :
3 W (10% distortion), 8 Ω 2 mW (10% distortion), 200 Ω less than 0 dBµ (20 dB SINAD) less than -6 dBµ
1-13
Receiving AF circuit SQ VOL
U30 R1 SQ SET
U29
SQ SIG
TX/RX
BEEP MAX BEEP SCK, SDA, LE
CH70 RX (05P0675)
CH70 RX AF
VHF CPU
CH70 1200
U30-2/4 U31-3/4
(T/RD 05)
RX PLL LOCK DET
MODEM
RXA
MOD IN RXA
U31-1/4
SQ DET
RX (05P0672)
U31-2/4
U2
U30-1/4
LINE MON
TX (05P0618A)
RT1200 LOOP
U30-3/4 W-MIC
U31-4/4 LINE MON
MIC
U32-3/4
MODEM
LINE MON
REMOTE DSC
CONTROL (05P0616A)
U3 DSC CPU
Fig.1-10
AF Signal in Receiver
AF signal "RXA" from RX board is input to an analog switch U31-2/4 and "CH70 RX AF" signal from CH70 RX board is input to another analog switch U31-3/4. When appears on the DSC display, the control signal "CH70 1200" selects a DSC AF signal from CH70 RX board by switching the U31-2/4 on. When appears on the DSC display, the control signal "RT 1200" selects the DSC AF signal from RX board by switching the U31-3/4 on. "Loop" control signal is used for self-test. Loop test is practiced by detecting MODEM output directly. Input signals for transmitting modulation, W-MIC, MIC, MODEM, and REMOTE, are input to U31-4/4. The "LINE MON" signal that controls this switch is set by "RT4- TX AF monitor" in "setting RT" on Page 3-6. Turning on the switch can monitor each transmitting input signal line and check which signal is coming in. However, note that the "MIC" (HANDSET) input line from the main unit microphone cannot be monitored.
Remarks)
Receiving AF input signal for DSC is selected by "DSC setup".
• CH70 selection → display • VHF selection
→ display
1-14
5. Controller section 5V S1
NMI SW
NMI CLK OUT
74HC02AF : FU15 74HC138AF : FU1, 6, 7 74HC42AF : FU9
(DSC CPU) T/R 0
MIF (Serial Printer)
T/R 1
SIO Control BUS
SIO
Dimmer
Adress Decode
RESET
M51953L
M27C40001
AT28C64A
µPD43256BGU
U4 ROM
U8 EEROM
U5 S-RAM
RESET
Backup Q18/19 Control (BT1)
Adress BUS
P0
Contrast
SI-8031L
µPD70320GJ
(V25)
U19 Reset Control
U20 AVR
15V
U3
16MHz
NMEA
RESET 8MHz CLK
Data BUS
Alarm LED
P1
Beep/Beep Control Key Scan
U11 74HC245AF
Latch IRQ0
P2
U10 µPD771055GB
(PIO)
PT
P2
DSC Recive Data
P1
MBM89371A U12 (SIO)
U14
P0
SIO
T/R State Data
T/R LED Data
RESET
LCD Data
SIO
CLK
T/RD02
Key In
NOR 74HC4078AF 1/13
U13 74HC193AF
8MHz CLK
LCD Control T/R Control Data
P4
INTR1, 2
P3 DMC
P2
T/R LED CH-Data Latch
P5
T/R Key In
(T/RD04)
Modulation Line Select Modulation Line Moni TX PLL Data ON Hook
P1
U2
P6
HD6475328CP (H8) (VHF CPU)
PTT (HS, W-HS, TX Key) TEMP Power DET (TX) SQ DET SQ set POW (DX-8700)
MIF (RB-700)
P9
RX Control Data (PLL, etc) TX Power Control (T/RD05)
P7
Beep Out
MSM6927GS U29
AIN
MODEM
SGI
SQ Sig Input
P8
TP-1 7.9872MHz Y1 15.9744MHz C2
Fig.1-11
Controllor Circuit
To clear the contents of EEROM and S-RAM for DSC , press [S1 : NM1] while keeping power on; turn the power off, and on again; then will be displayed; and select an object item and press [ENT] key. (Refer to section 5.5 for more details.) The oscillator frequency of Y1 (15.9744 MHz) connected to U2 (VHF CPU) determines the communicating speed of DSC (1200BPS). To adjust the frequency, turn on power while pressing [CH16] key, then adjust C2 so that the frequency at TP1 becomes 7.9827 MHz ± 30ppm.
1-15
Panel DSC KEY BOARD DATA (8bit) CONT (2bit)
LCD
(LCM-523-68HE-4)
(DB1-8, RS, R/W)
1
2
3
CAN -CEL
ALM
4
5
6
DIM
CALL
7
8
9
SELC
DIST
<
0
>
ENT
KS 0 KS 1
KS 3 KIN 4
KIN 3
KIN 2
DIMMER (DIM 5VA)
KIN 1
KIN 0
CONTRAST (Vo) DIMMER (DIM 5VB)
KEY IN (5bit)
DIMMER (DIM 5V)
ALM 0 ALM 1 ALM 2
DSC ALM LED
5V VHF KEY BOARD
CH Indicator (7seg. LED × 3) VHF
CH16
Key In
Key Scan
KS 2
LED × 7
HI/LOW
ALM LED CONT (3bit)
• REM • WX • TX • SP
• USA • PRIV • LOW
SP ON/OFF
Latch
SQ AUTO
(TC74HC573AF) × 4
LED ON DATA (8bit) (LED D0-7)
SCAN/DW/OFF LED LE 0 LED LE 1 LED LE 2 LED LE 3
Fig.1-12
Panel Circuit
1-16
Latch
Output power control
The output power of PA (U1) is picked up by the power detector CR6 and U2, and applied to the comparator through the A/D converter. The comparator compares the output power of the PA with power data stored on the EEROM U8. The comparator output signal is applied to the PA as power control signal through the U/D counter and the D/A converter. Thus, the PA output power is controlled until the programmed output power is obtained. Programming of the output power is carried out by rotating the CH knob in the power adjustment mode. The power is programmed when the PTT switch is released. The power adjustment is made on six frequencies, CH14, CH60 and CH88 in both simplex and duplex modes. Using two data among those data, the power data for other channels is determined. TEMP and POW signals Temperature signal "TEMP" is applied from POWER board to U2 on the CONTROL board through RX board. When the temperature becomes 70 to 80 degrees, the power data from EEROM U8 is compensated by the TEMP signal and the output power is reduced to a minimum of 10 W depending on the temperature detected. The power signal "POW" from the DX-8700 monitors T/R antenna power. During selftest, TRANSMIT POWER: NG appears if TX output power is less than 15W.
U1: M57710A (PG≥21.5dB) 0.1~0.2W #1
POW DET
CR6, U2
#2
DET
15V
POW DET (0 - 5.0VDC)
U2, 7, Q3
POW CONT
U2
POWER PCB (05P0617)
DX-8700
TX OUT (25W)
#4
PA
#3
TX (05P0618)
POW DET
POW
10bit A/D Power Data Display (000~999)
RX PCB (05P0672) CPU
Power Data Write
COMP
Power Data Read
-
t C° TSENCE
U8 EEROM
TEMP CH KNOB
RT1101
U3
8bit D/A
U/D Counter
Power ADJ
CONTROL (05P0616)
Fig.1-13
Output power control
1-17
Self-test
Self-test is made in the following process. The test includes receiver circuit test and AF loop back test. In the receiver test, CH70 RX and RX boards receive leakage of TX PLL modulated DSC signal. In the loop back test, the MODEM output is fed back to the MODEM input on the CONTROL board.
H8: VHF CPU
V25: DSC CPU Start 1 CH70 RX PCB TEST Preparation for receiving leakage of TX PLL RF signal by RX PCB
CH70 RX AF supplied to MODEM (CH70 1200)
Loop back test (No TX during test)
Command Transfer
LOOP BACK TEST
Receiving
2 RX PCB TEST RX A supplied to MODEM (RT1200)
Start
Start
End command transfer
End command transfer
MODEM selected for TX (MOD IN) line
TX/RX PLL set to CH70 (DSC modulation)
End
PLL UN-LOCK?
Preparation for receiving leakage of TX PLL RF signal by RX PCB
Reading and decoding status error information
Status display NO (LOCK)
Un-lock flag set
Flag set for loop back test result
NO (LOCK)
PLL UN-LOCK?
YES
(See note.)
YES NO
Result deta set CH70 RX AF supplied to MODEM? (CH70 1200)
End
YES Note) RX PCB and CH70 RX receive leakage of PLL RF signal
3 AF LOOP BACK TEST MODEM output fed back to input (Loop) MODEM output connected to MODEM input Command transfer
Start
LOOP BACK TEST
Receiving
End command transfer
End command transfer
End
Reading and decoding status error information
Status display
Reset status
Result display
End
Fig.1-14
Self-test process
1-18
6. Power supply section Filter PCB (05P0673)
24V
Power PCB (05P0617)
CB1: 10A J609-1/2 J301-1/2
Line Filter
Filter PCB (05P0673)
U2
K1
15V
REG
J304-3/4
J604-6 15V
J610-1/2 Line Filter
Q2, 3 , 4 J302-1 POWER SW
TX
J302-2
J603-3
J602-5 TX
RL CONT Q1
J303-1/2
to A
TX PCB J107-1/2
to B
CONTROL PCB J411-2
to C
RX PCB J206-1
to D
RX PCB J208-1
Over /Low Volt Protect J304-1 U1
MB3761PF
See note.
J304-7
J304-8
C
J602-6 15V
A
D RX PCB (05P0672)
TX PCB (05P0618A)
U9 AFP
J107-1/2
J208-1
5V
µPC78L05T
U12
J206-1
U4 REG
15V (PA)
AN7809F
REG SW Q14 REG
J204-3
J103-3
J204-1
J103-1
J207-3
FIX 8V TX 8V
TX
(To Wing Handset)
TX ON 5V
B
U13 AN78L05M
CONTROL PCB (05P0616A)
J411-2
U20 REG
5V
SI-8031L
U18 REG
Note) (1) Overvoltage protector: activated by 32 VDC (2) Lowvoltage protector: activated by 20 VDC
Fig.1-15
AN78L12M
Power Supply
1-19
12V
REMOTE: RB-700 Wing Handset: DX-8700
7. IF-8500 (Printer interface) Serial printer data from the FM-8500/8700 is sent to the printer interface IF-8500 where MIF data or Furuno radio interface data is converted into parallel centronics data. The output of the interface is connected to the printer PP-510. Further, MF/HF terminal DSC-5/6, NBDP terminal DP-5/6, and No.2 VHF DSC (FM8500/8700) can be connected to the IF-8500 which outputs the data on a first-in first-out basis. No.2 FM-8500 /8700
No.1 FM-8500 /8700
(50 m MAX)
(50 m MAX) Serial data
Parallel data
IF-8500
Serial data
(Signal and Line conversion)
Parallel data Parallel data
(5 m MAX)
DSC (DSC-5/6)
(5 m MAX)
NBDP (DP-5/6)
power supply DC24 V
Fig.1-16
Connection of IF-8500
Photo Coupler
No.1 VHF DSC FM-8500/8700
RXD
BUFFER
U1
U8
TXD
Q1
DC24V
RXD
U3
CR3
U11 REG
(1A)
(V06C)
(TA78DL12)
U4
U10 12V
SW REG
(CBM-1205SF)
5V
Y1 9.2 MHz
CR10
IF-8500
Fig.1-17 Block Diagram of IF-8500
1-20
DSC (DSC-5/6)
DATA
NBDP (DP-5/6)
BUFFER
Q2
CB1
DATA
BUFFER
(ROM/ RAM/ SIO)
U9
TXD
U6
(HD647180XOFS8L)
Photo Coupler
No.2 VHF DSC FM-8500/8700
PP-510
Adhering to Centronics (5 m MAX)
DATA
PP-510
Series connection of IF-8500 When DSC-8VP, DSC-5V, and FM-7500, which output printer data in parallel format, is connected to the IF-8500 together with DSC-5/6 and/or NBDP, the two IF-8500 must be used as below. The jumper setting must be changed. J1 JP1 JP2 JP3
CB1
CPU Board Put jumper. Serial port: TB-1 3-6 or Serial port: TB-1 7-10 No.1 VHF DSC (ex. DSC-8VP)
IF-8500 Serial data
Parallel data (JP3:open)
(JP3: Short)
Serial port: TB-1 3-6 or Serial port: TB-1 7-10
not used
DSC port: J5 or NBDP port: J3
Fig.1-18
Series Connection of IF-8500
Setting of JP3 in IF-8500 JP3
Open (default)
PP-510 NBDP
IF-8500
Parallel data No.2 VHF DSC (ex. DSC-8VP)
DSC-5/6
Input
Output
Port
Data
J3 (NBDP)
Parallel
J5 (MF/HF DSC)
Parallel
TB-1 (No.1/2 VHF)
Serial
Port
Data
J4 (PRINTER)
Parallel
TB-1 (No.1/2 VHF)
Serial
J3 (NBDP) Short
Parallel J5 (MF/HF DSC)
1-21
Chapter 2
Location of Parts
1. Control Panel
For DSC
For VHF
2. Rear Panel PRINTER WING HANDSET DMC
NMEA GND
HANDSET POWER
TX ANT
RX ANT REMOTE EXT SP BREAKER
2-1
3. Bottom View, Cover removed
Loosen these screws to detach the panel
TX/RX/POWER Boards under the cover
CONTROL Board (05P0616A)
4. CONTROL Board
CPU for VHF (U2 : HD6425238CP/H8)
TP-1 CH16 + PWR ON : 7,9872MHz±30PPM (C2 ADJ) S1 NMI SW
CPU for DSC (U3 : UPD70320/V25) JP-1 (BATT ON/OFF) ROM for DSC (U4 : M27C4001) EE-ROM (U8 : AT28C64) ROM BACK-UP (BT-1)
C2
MODEM JP2 JP3/4 (U29 : MSM6927GS) MIC SELECT
2-2
I/O (U12 : MBM89371A)
5. Bottom View (CONTROL Board and the cover removed)
PA FIL Board (05P0673) (U1 : M57710A)
TX Board (05P0618A)
POWER Board (05P0672)
R79 MIC R64 MOD
RX VCO
CR11 (TX PLL UN-LOCK Detector)
RX Board (05P0672)
C76 TX Frq
C95 RX Frq CR2 TX VCO (F-21.4MHz±10PPM) (RX PLL UN-LOCK Detector)
6. Panel
PANEL Board (05P0615)
2-3
7. Duplexer (DX-8700)
TP2 (16.445 MHz CHK)
C73 (156.525 to 16.9 MHz ±10PPM at TP1)
TP1
J2: D ANT J11
J6: CH70 IN
Duplexer
J3: D TX
J1: D RX C23
CH70 RX Board J10
TB-1
J5: CH70 OUT
C14
J4: ANT TX IN
ANT CH70 RX ANT
WING HANDSET
2-4
NMEA RX OUT
Chapter 3. Change of System Setting 3.1
Outline of system setting
Precautions The following operations shall be executed only by the dealers and agents that FURUNO has approved. Those dealers and agents shall conduct the following system setting under their responsibility. It is strictly prohibited to disclose this information to the operators and possessors of the machine, because immoderate changes of the system setting will cause performance variation of the apparatus.
The system setting will be executed when the machine is installed. However, when the system setting change is required because of unit exchange or other reasons, follow the procedures described on the following pages. Contents of system setting
DSC section
VHF section
Confirmation of the ID number of the own ship (How to change the ID number is described on Page 3-15). 1 Selection of receiver section (VHF receiver or CH70 receiver) and ON/OFF setting of DMC connection 2 Pre-settings in VHF section (1) Selection of USA/WX mode (2) Confirmation of Private mode (How to change the mode is described on Page 3-15). (3) Auto-revert function (4) Automatic ON/OFF setting of internal speaker (5) Restriction on continuous transmission time (6) Monitoring of sending sound (7) Automatic 1W function (8) Dual watching (9) Scanning (10) Setting of audio squelch range 3 Channel pre-setting of each mode 4 Setting of transmitting power (Maximum power and reduced power) 5 LCD display selection between Japanese and English
3-1
3.2
Change operation to normal mode or test mode
Change of the system setting, except " Input of ID number of the own ship", is executed after changing from normal mode to test mode in the following procedures. The normal mode means the state in which is displayed on the LCD screen of DSC and the test mode means the state where is displayed. Procedures
Protection OFF 1. In the normal screen, press display will appear.
V
P
ID
DSC
RT
CH
SELECT
PO
key first and
key next. Then this
9
Display 1
L
Blinking
2. Put the cursor on "P" by using
key and press
ENT
key.
* System protected *
3. Input password (secret code). 6
5
2
1
1
Protection < ON
1
>
OFF
4. Put the cursor on "OFF" by using RT, CH, PO, and L can be changed.
V
P
ID
DSC
RT
CH
PO
key and press
ENT
key. Now, DSC,
Display 1
L
6 Display mode selection (p.3-12) 5 Power adjustment (p.3-10) 4 Channel preset (p.3-8) 3 Preset of VHF (p.3-6) 2 Selection of receiver (p.3-4) 1 Confirmation of ship’s ID number (p.3-14)
3-2
Protection ON After changing the system setting of DSC, RT, CH, and PO, return to the normal mode in the following procedures. To close the display for setting, press
CANCEL
key several times.
Test
How to return to the normal mode (Watch display) Test
SELECT
9
V P ID -------
key, then press ENT key.
Select "P" by pressing
Protection < ON
> OFF
Select "ON" by pressing
key, then press ENT key.
Press CANCEL key twice to return to the watch display.
After changing system setting, be sure to return from mode to the normal mode of display.
3-3
3.3
Change of system setting
[About the rules for key operation]
In the selection menu as follows, two methods are available to choose one item. One is to select an item by using the arrow key and press ENT key. The other is simply to press the number key corresponding to the required item. (Example) DSC: Receiver Selection menu
CH70[1] VHF[2]
Selection method
• Put the cursor on the required item with the arrow key and press
ENT
key.
• Or, press the required number key, 1 or 2.
1. Setting DSC (Selection of receiver) Select "DSC" on the display 1.
Display 2 V P ID DSC
---
At the display 2 (shown above), press ENT key. DSC: Receiver CH70[1] VHF[2]
CH70 VHF
DSC CH70 receiver used VHF receiver used
Select either one with the arrow keys followed by ENT key, or by pressing the corresponding numeric key. Note : Normally select "CH70" for DSC continuous watch. If two FM-8500 are installed for duplication, select this setting as follows :
Main (No.1) FM-8500 Sub (No.2) FM-8500
"CH70" "VHF"
(Continued on next page)
3-4
When No.1 FM-8500 fails, use No.2 FM-8500 after interchanging these settings.
(From previous page)
DSC: remote DMC ON[1]
OFF[2]
Place the cursor on a desired item with arrow keys, then press ENT numeric key (1 or 2).
key. Or, press corresponding
Note) When FM-8700 is connected to DSC, select "ON[1]".
V
P
ID
DSC
RT
CH
PO
Display 3
L
3-5
2. Setting RT (Function of VHF section) Refer to the next page for the factory default value. Function RT1- Mode: USA/WX <
> Selection of USA/Weather modes ON: Enable OFF: Disable
OFF[1] ON[2]
After selection
RT1- Mode: private <
>
Selection of Private mode ON: Enable OFF: Disable
protected
After selection
"Protected" RT2- Hook work: CH16 <
> Auto revert function (Automatic setting of CH16 on ON HOOK status) ON: Enable OFF: Disable
ON[1] OFF[2]
After selection
RT2- Hook work: SP <
>
Automatic internal speaker setting (on/off) according to handset status as below.
ON[1] OFF[2]
Handset ON HOOK OFF HOOK
After selection
Speaker on off
ON: Enable OFF: Disable RT3- Time out timer <
>
Continuous transmission time limit ON: 5 minutes OFF: no limitation
OFF[1] ON[2]
After selection
RT4- TX AF monitor <
> Tx AF monitor from DSC, Handset, Wing Mic or remote station.
OFF[1] ON[2]
After selection To Tx line
DSC Wing Mic
To INT SP
Handset
To RB-700 (line-out)
RB-700
Tx AF monitor ON/OFF command from CPU
(Continued on next page)
3-6
(From previous page) Function RT5- Auto 1W <
> Auto 1W (Power is automatically reduced to 1W when the low output power channel is selected.) ON: Enable OFF: Disable
ON[1] OFF[2]
After selection
RT6- Dual Watch <
>
Dual watch operation
ON[1] OFF[2]
After selection
RT6- Scanning <
> Scan operation
ON[1] OFF[2]
After selection
RT7- Auto SQ < LOW=
HIGH
>
Audio squelch (voice detecting type SQ) range setting
HOLD LOW : Lower limit of voice freq. HIGH : Upper limit of voice freq. HOLD: SQ hold time (SQ open time after signal goes away.)
(Setting value) x 50 =
Hz
(Setting value) x 20 =
ms
Enter 2-digit data for lower limit followed by ENT key. Then enter "HIGH" and "HOLD" data in the same manner as "LOW".
Display 4
V P ID DSC RT CH PO L
Default settings Delivery
RT1 RT1 RT2 RT2 RT3 Mode: Mode: Hook work: Hook work: USA/WX PRIV CH16 SP OFF OFF ON ON OFF Standard USA ON OFF ON ON ON * RT7) LOW=06 HIGH=16 HOLD=30
3-7
RT4
OFF OFF
RT5
ON ON
RT6 DW ON ON
RT6 SCAN ON ON
3. Setting CH (Channel presetting) Transmission/reception mode, communication mode, and output power can be selected as follows. In the display 4 on the previous page, press INTL CH: XX <
ENT
key.
> LEDs
ENABLE= TX[1] RX[2] UN[3] USA
WX
PRIV
Select a desired channel mode and a channel with the channel knob. (Refer to right figure)
CHANNEL Knob
Every one pressing the channel knob successively changes the channel mode as follows. INTL (No LED)
USA
WX
PRIV
Then, set to the desired channel by turning the channel knob.
(Example) An example when CH20 of INTL (International channel) is selected. (Refer to the next page when the private mode (PRIV) is selected.) This shows the preset seting status on INTL CH20. INTL CH: 20 <
>
ENABLE= TX[1] RX[2] UN[3] TX : Both transmission and reception available. RX : Reception only available UN : Unable (Neither transimission nor reception available)
After selection
INTL CH: 20 <
>
TELECOM= SIMP[1] DUP[2] Communication mode selection SIMP : Simplex DUP : Semi-duplex
After selection (Continued on next page)
3-8
(From previous page) INTL CH: 20 <
>
TX POWER= HIGH[1] LOW[2] Output power selection HIGH : 25W LOW : 1W
After selection Setting on INTL CH20 can be checked. INTL CH: 20 <
>
ENABLE= TX[1] RX[2] UN[3]
INTL CH20 has been preset.
An example when the private mode is selected. Memory No. P01/CH : XXX <
>
PRIV No. SELECT: []key
Select a desired memory number (maximum: 20) with the arrow key and press ENT key. Then, select a channel to preset by turning the channel knob. (Refer to the appendix 2 for the channel list.) (Example) Memory No: 02, CH: 100 P02/CH : 100 <
>
ENABLE= TX[1] RX[2] UN[3]
Set every item successively in the same manner as an example when CH20 of INTL (International channel) is selected. on the previous page. After presetting all the channel mode, exit from the channel preset menu by pressing CANCEL key.
V
P
ID
DSC
RT
CH
PO
Display 5
L
3-9
4. Setting PO (Setting transmitting power) In the display 5 on the previous page, press press ENT key.
key (Selection of "PO"), then
DUP Pow- CH60 High power adjustment on INTL CH60
SELECT [MODE][CH][H/L]SW
Set on CH14, CH60, and CH88. To compensate a power loss in the duplexer, set the maximum power and reduced power in "DUP" and "SIMP" modes on these channels as follows. The channel to set power, DUP/SIMP mode, and the power setting value (power data) are displayed. • The case of CH60 in DUP and SIMP modes Set the maximum transmitting power (power data) by turning the channel knob while pressing PTT switch. Releasing the PTT switch at the desired value fixes the value. (Power data: 800 ± 100 → Transmitting power of approximately 25 W) ------ Refer to the next page for the power data. Next, press
HIGH/LOW
key, then this display will appear.
DUP Pow- CH60 Low power adjustment on INTL CH60
SELECT [MODE][CH][H/L]SW
Set the reduced power (power data) in the same way as above. • The case of CH14/CH88 in DUP and SIMP modes Set the channel to CH14 (or CH88) in DUP or SIMP mode by turning the channel knob. SIMP Pow- CH14 High power adjustment on INTL CH14 (or CH88)
SELECT [MODE][CH][H/L]SW
Set both the maximum and reduced power in the same way as the case of CH60.
After setting the powers in DUP and SIMP modes, set powers in the private mode. In the private mode powers can be set in every channel independently.
3-10
To change to the private mode, press [CH16] key while pressing and holding down the channel knob. To change the private channel, turn the channel knob. TX Power:Priv01<
>
PRIV mode
SELECT:[MODE][CH][H/L]SW
After the completion of power adjustment on all modes, press
V
P --------------- PO
Display 6
L
(Continued on next page)
3-11
CANCEL
key.
5. Setting L (Selection of LCD display, Japanese or English) For the transmitting/receiving message display in DSC and menu display, Japanese (katakana) or English is select. (From previous page)
Press ENT
key.
LCD language <
> Language Selection E: English J: Japanese
E[1] J[2]
After selection
V P --------------- PO L
Select "P", then press ENT
Protection < ON
key.
> OFF
Select "ON", then press ENT key.
To return to the normal display, press CANCEL key several times.
3-12
3.4
Change of jumper setting
Setting wing handset type
Change the setting of a jumper plug JP2 on CONTROL board in accordance with the type of wing handset. Whichever, "D" or "C", is selected, adjusting R127 is not required. R127 JP2 (Jumper Plug) D C
D
C
For Carbon MIC (Default)
C
For Dynamic MIC
or D Ni-cd Battery
Top view of CONTROL Board
Setting on common or respective use of antennas
If an antenna is commonly used for both VHF and CH70, or if two individual antennas are used for VHF and CH70, wirings in DX-8700 must be changed. • Use of one antenna commonly for VHF and CH70; Connect J5 CH70 OUT and J6 CH70 IN with a coaxial cable with minipins. • Use of two antennas respectively for VHF and CH70; Connect the coaxial cable with mini-pin from "CH70 RX ANT" connector to J6 CH70 IN .
Duplexer
CH70 RX Board
J10
J3
J6
J1
TB1
D ANT
J2 ANT
D RX
(CH70 IN)
D TX
J11 J5
J4
(CH70 OUT)
TX IN
ANT
CH70 RX ANT
3-13
RX OUT
3.5
Confirmation of ID number
Procedure
1. In the normal display, press display will appear.
V
P
ID
DSC
RT
CH
PO
SELECT
key first and
9
key next. Then this
L
Blinking
2. Put the cursor on "ID" by pressing
V
P
ID
DSC
RT
CH
PO
key and press
ENT
key.
L
3. Confirm the ID number of the own ship. (MMSI : Maritime Mobile Ship Identity) * Own identification * Protected MMSI: X1~X9 Own ship ID
4. After the confirmation, return to the normal display by pressing several times.
3-14
CANCEL
key
3.6
Changing ID number and ON/OFF of Private mode
Procedures
1. Turn on power and press NMI switch. Control Board (05P0616A) NMI Switch (S1) Ni-Cd Battery
Bottom view of Main Unit, Cover removed
2. Once turn off the power. 3. Turn on the power again, then this display will appear. Clear < NO
RAM
> EEROM
Note that EEROM clear changes the RT : VHF presetting to the default.
ALL
4. Select EEROM with the arrow key and press ENT key. A display "Now WRITING EEROM" will appear, and after about 15 seconds another display "Turn off the power" will appear. Then, turn off the power. 5. Turn on the power again, then this display will appear. TEST VHF ch70 Test mode manual
6. Press
V
P
SELECT
key first and
ID
RT
DSC
CH
PO
9
key next, then this display will appear.
L
Blinking
7. Put the cursor on "ID" by pressing
Enter own indentification [digits] MMSI=
key and press MMSI = Maritime Mobile Ship Identity
3-15
ENT
key.
Entry of ID
8. Input the ID number of the own ship with nine digits, check to be sure about the input number, and press ENT key. (When a wrong number is input, press CANCEL key and re-input the correct number.)
V
P
ID
DSC
---
9. Put the cursor on "RT" and press RT1- Mode: private <
ENT
key twice.
>
Private mode ON/OFF selection
OFF[1] ON[2]
Selection
10. After the selection, return to this display with
V
P
ID
DSC
RT
CH
PO
ON
key.
L
11. Put the cursor on "P", and press Protection <
CANCEL
ENT
key.
>
OFF
12. Select "ON", and press ENT key. (Here, by pressing ENT key again, the input ID number can be confirmed. If the number is incorrect, input the correct number from the first step. ) 13. Return to the normal display by pressing CANCEL key several times. Watch VHF ch70 auto
The ID number to input must be the MMSI number that is allocated to the ship. Again, check that the input number is correct.
3-16
Chapter 4. Adjustment and Measurement 4.1 Transmitting frequency and power TX Frequency TX Freq. On CH16
Conditions
156.8MHz ± 300Hz
PTT : ON
Adjuster C76 (TX Board)
Rated Value ±10PPM
Connect a frequency counter as illustrated below, and read the frequency on CH16 with PTT switch ON.
DX-8700
ANT
Watt meter (50Ω)
Dummy load (50Ω)
CH70 RX ANT
Frequency Counter
1 Make a pick-up coil by winding a wire by four
to six turns like a coil, and connect it to the frequencty countor. 2 Put the pick-up coil close to the dummy resistor or ANT coaxial cable, and pick up the transmitting frequency.
If the measured frequency is out of specification, adjust C76 on TX board. The C76 is a variable capacitor to adjust the reference frequency of the transmitting synthesizer PLL circuit. By adjusting the frequency of only one channel, the transmitting frequencies of all the other channels are adjusted at the same time. TX Board Control Board
Hole for C76 adjustment
Bottom View Cover removed
Transmitting power
For adjusting transmitting power, refer to setting "PO" in Section 3 "System setting" on Page 3-10. • Default power (factory setting): 21-25W (Reduced power specification: 0.7-1W)
4-1
4.2
Measurements on CH70
CH70 is a channel allocated for VHF DSC. Transmission on this channel does not work by depressing the PTT switch on the handset. Measurement of power and frequency on CH70 are made in DSC operation. Tone frequency (mark/space) is also measured in DSC operation. For these measurements on CH70, DSC operation must be changed from its normal mode (watch display) to test mode (test display). After the measurements, be sure to return DSC operation to normal mode. Change DSC mode from WATCH to TEST
From "Watch" screen to "TEST" screen (Protection : OFF)
SELECT
Key operations on DSC
Mark : 1300±10Hz Space : 2100±10Hz
Tone Measurement
CH70 Freq & Power Measurement
Change DSC mode from TEST to WATCH.
→
CH70: 156.525MHz±300Hz
From "TEST" screen to "Watch" screen (protection:ON)
Remarks) 1. Tone frequency (mark/space) cannot be adjusted. If the frequency is out of ±10 Hz of the specification, Y3 (3.58 MHz) on CONTROL board is faulty. 2. For adjusting power of CH70, refer to "setting PO" in Section 3 "System setting" on Page 3-10. 3. For adjusting frequency of CH70, refer to Page 4-1 in this section.
4-2
1. Mode change Changing to test mode
1. In the normal mode, press the keys successively.
SELECT
→
9
→
→
ENT
-
* System protected *
2. Input a password (secret code) ----> Password: 652111 (These digits are not shown on the display.) Protection < ON
>
OFF
3. Select "OFF", and press ENT key.----> This leads to test mode. 4. Change the display to test mode by pressing CANCEL key several times. ("TEST" flashes.) 5. Measure the tone (mark/space), power, and frequency of CH70. SELECT → → “TONE” selection (Refer to the next page for this measurements.) Returning to the normal mode
6. Successively press the keys Protection < ON
SELECT
→
9
→
→
ENT
.
>
OFF
7. Select "ON", and press ENT key. --- This leads to the normal mode. 8. Return to the normal display ("Watch" display) by pressing CANCEL key several times.
4-3
Outputting mark/space signal.
Preparation) For measuring tone signal, connect a frequency counter to the external speaker terminal (EXT terminal) on the rear panel of FM-8700. (EXT speaker load: 4 Ω or 8 Ω) Set the audio volume at an appropriate level. 1. Set the VHF channel to "CH70" (Turn the channel knob). Next, press HIGH/LOW key to make transmitting power LOW. ("LOW" illuminates.) ----->This prevents transmitting power from being induced to the counter. 2. Press keys: SELECT → .
TONE
3. Press
CR
DIST-CH
ENT
MARK
key, then this display will appear.
SPACE
…
4. Select "MARK" (mark) and press
ENT
key, then this display will appear.
Now doing
5. To output the mark signal, depress the PTT switch on the handset. (If the speaker is on, the mark tone can be heard.) 6. Confirm that the mark signal frequency is within the specification (1300 ± 10 Hz). 7. Press ENT key to stop the mark signal output.
CR
8. 9. 10. 11. 12. 13.
MARK
SPACE
…
After confirming the cursor is on "SPACE", press ENT key. Press the PTT switch on the handset to output the space signal. Confirm that the space signal frequency is within the specification (2100 ± 10 Hz). Press ENT key to stop the mark signal output. Change the display to test mode by pressing CANCEL key several times. Return from the test mode to the normal mode ("Watch" display).
4-4
Outputting the transmitting carrier of CH70 (Measurement of the power and frequency)
Preparation) For the measurement, connect the measuring instruments in the same manner as shown on Page 4-1. 1. Set the VHF channel to "CH70". (Turn the channel knob.) When measuring "Reduced power", set to "LOW" with HIGH/LOW key. 2. Press the keys: SELECT →
TONE
3. Press
CR
DIST-CH
ENT
MARK
key, then this display will appear.
SPACE
…
4. Select "CR" (carrier), and press
ENT
key, then this display will appear.
Now doing
5. Press the PTT switch on the handset to output the carrier. 6. Measure the power (25 W) and frequency deviation (±300 Hz) of CH70 (156.525 MHz). 7. Press ENT key to stop carrier output. 8. Change the display to test mode by pressing CANCEL key several times. 9. Return from the test mode to the normal mode ("Watch" display).
4-5
4.3
Other measurements
1. Confirmation of receiver sensitivity For simplicity, measure the 20dB NQL (Noise suppression limit sensitivity). Preparation
Connect the measuring instruments as follows. SSG (FM)
50Ω
RX ANT
4Ω, 3W, SP or, 4Ω, (3W) Dummy Load
EXT SP
FM-8700 FM-8700 Settings : CH16, SQ OFF, Adequate Volume
24V
Low-frequency Watt meter
Measurement
1. Output from SSG the signal of about 0 dBuV, frequency of 156.8 MHz, modulating frequency of 1 kHz, and frequency deviation of 3.0 kHz, and confirm that this signal can be received. 2. Turn the SSG modulation off and switch the SSG output off. 3. Measure the noise level from the speaker with a low frequency voltmeter and adjust it to 0.5 Vrms by turning the audio volume. 4. Input the unmodulated signal from SSG. 5. While varying the SSG output, search for such an output level as the noise output level is decreased by 20 dB (0.05 Vrms). If the level is less than 0 dBuV, the sensitivity is good.
Remark) No volumes or no other parts on the PC-boards are used for adjusting the sensitivity. Do not arbitrarily adjust any parts or transformers on the boards.
4-6
2. Confirmation of transmitting modulation degree Preparation
Connect the measuring instruments as follows. TX ANT
50Ω
ATT.
50Ω
Coupler
50Ω
Wattmeter
Low-frequency 600Ω MIC
SG (AF OSC)
50Ω
FM-8700
1kHz output PTT Switch
24V
Settings : CH16, MAX Power
FM Linear Detector
Measurement
1. Set the AF OSC output to -46 dBm; 1kHz. 2. Transmit FM-8700 with PTT switch on. 3. Adjust the coupler and FM linear detector, and measure the frequency deviation. The specification: 2.4 - 3.8 kHz 4. To check the maximum frequency deviation, adjust the AF OSC output so that the frequency deviation becomes 3 kHz. 5. Check to be sure that the maximum frequency deviation is less than 5 kHz when the AF OSC output level is increased by +20 dBm from the adjusted value above. Reference) These adjustments are made by the potentiometers, R79 (MIC) and R64 (MOD) on TX board. Do not adjust them arbitrarily. When the adjustments are required, be sure to use calibrated measuring instruments. Adjusting method
1. Turn R79 (MIC) fully CW (maximum). 2. Measure the maximum frequency deviation by following step. 4 of the above measuring procedure, adjust the volume R64 (MOD), and set the deviation to 4.7 kHz. 3. Set the AF OSC level to -46 dBm, and adjust the frequency deviation to 3 kHz with R79 (MIC).
4-7
3. Confirmation of receiving sensitivity of CH70 RX board In the regular measurement, the error rate in DSC should be measured by inputting DSC message signals on CH70. However, to derive an indication of the sensitivity, the NQL of the CH70 LINE output of CH70 RX board (J8-5, 6) is measured by inputting a signal CH70 (156.525 MHz) from CH70 RX ANT of DX-8700. Measuring method is same as that described in "1. Confirmation of receiver sensitivity" on Page 4-6. Preparation J8-5 : CH70 RX-H 6 : CH70 RX-C
DX-8700
Duplexer CH70 RX Board J8
Low-frequency voltmeter (Connected to J8 #5 and #6).
T.B.
ANT
SSG (FM)
CH70 RX ANT
Jumper setting must be checked. See section 3.4 in chapter 3.
Measurement
1. Output the signal from SSG; about 0 dBuV, 156.525 MHz, modulating frequency of 1 kHz, and frequency deviation of 3.0 kHz, and confirm that this signal can be received. (The receiving sound can be heard by turning TX AF monitor on by the system setting.) 2. Turn the SSG modulation off and switch the SSG output off. 3. Read the CH70 RX level (AF LINE) output on the low frequency voltmeter. 4. Input the unmodulated signal from SSG. 5. While varying the SSG output, search for such a SSG output level as the level read in step. 3 is decreased by 20 dB (1/10). If the level is less than 0dBuV, the sensitivity is good.
Remark) No volumes or no other parts on the PC-boards are used for adjusting the sensitivity. Do not arbitrarily adjust any parts or transformers on the boards.
4-8
Chapter 5. Maintenance check
Warning In this apparatus a high voltage that may cause shock, burn, or even death is applied. Do not touch inside in case a man has no knowledge of electrical circuits or exact safety measures are not taken.
5.1
Periodical check
To derive full performance of the apparatus, a periodical maintenance check is indispensable. Do all maintenance checks after turning power off.
1. Cleaning of display portion The display portion is made of an acrylic board. Wipe dirt off with a soft dry cloth periodically. Never use gasoline, paint thinner, or benzene for the cleaning.
2. Check of loose connectors Check to be sure that the connectors and earthing terminals of FM-8700 and DX-8700 are tightly fastened. There are many connectors inside the apparatus. At least once half a year check to be sure that those connectors are not loosened by ship vibrations.
3. Antenna Items Whip antenna Coaxial cable
Check points Is there any cut or water leak at the connector portion ? Is there any cut on the surface ?
5-1
Remedies Exchange it if the cut is deep. Wind a tape round the cut, if any.
5.2
Everyday operational test (Self-test)
Be sure to do operational test everyday to find malfunctions in advance, if any. (Do the test everyday so that a distress message could be transmitted without fail in a distress.) Press
3
key at the normal display.
Watch VHF CH70 (Normal display) 3
(TEST)
VHF DSC SELF-TEST
* Test in progress * (Testing) Please wait ! Several seconds later
• If the PTT switch was pressed once before this test.
• If the PTT switch was not pressed once before the test.
* Completed * Daily test
* Completed * Daily test
VHF DSC: GOOD
VHF DSC: GOOD
(Including TX check.)
Alarm sounds. (Distress alarm check) To silence it, press ALARM STOP key. CANCEL
Returns to normal display.
5-2
NO TX CHECK
If "NG" appears * Completed * Daily test VHF DSC: NG To view reason for NG, press
ENT
.
(Error messages) Pressing
key scrolls
ENT
the error message displays.
Check end: [CANCEL] key CANCEL
Returns to normal display.
"NG" error messages and their meanings and remedies are shown on the next page.
5-3
"NG display"
Six "NG displays" are included in the test. If any error occurred in the test, NG portions can be displayed by pressing ENT key successively as mentioned above. NG display
Remedy
TRANSMIT POWER: NG
The transmitting power is less than about 15 W.
TX PCB (PLL LOCK): NG
CPU for VHF (U2) detected unlock- Check PLL (U5) and ing of the PLL on TX board. associated components on TX board. Replace TX board.
CONTROL PCB: NG DSC CPU
Either appears.
Meanings
U3
VHF CPU MODEM U30 U2
U29
(AF Loop back test) CH70RX PCB: NG Mark/ Space U2
Tx Circuit CH70 RX
(RF Loop back test)
CPU for DSC (U3) commands CPU for VHF (U2) to send mark/space signals and the signals are received through the modem U31 (U29). Then, whether the transmitted and received signals are the same in level and frequency, or not, is checked. CPU for VHF (U2) sends mark/space signals to the transmitting circuit (excluding the power Picked amplifier). The receiving circuit of up CH70 picks up the signals and sends them back to U2. U2 compares the received signals with the transmitted signals in level and frequency.
Check TX board (Power Amp. U1), defective antenna or DX-8700.
Check MODEM (U29) on CONTROL board. Replace CONTROL board.
Check CH70 RX circuit. Replace VHF RX/CH70 RX board.
DX-8700: NG
Replace duplexer. The transmitting power output from the duplexer is compared with the transmitting power output from the main unit was compared and a big power loss in the duplexer was detected.
RX PCB: NG
CPU for VHF (U2) detected unlocking of the PLL on RX board.
5-4
Check PLL (U10) and associated components on RX board.
5.3
Exchanging the nickel-cadmium battery
The nickel-cadmium battery on CONTROL board backs up contents of RAM (all the transmitted/received messages). The life of the battery is approximately five years. (The nominal voltage of the battery is about 3.6 V. If the voltage is more than 3.6 V with power supply off, the battery is normal.) Examine the battery voltage at regular intervals so as not to lose the important data backed-up. When the voltage has dropped, exchange the battery after printing out necessary transmitting/ receiving messages. If the battery is left for about one month without power supply, the battery will be flat and the RAM contents will be lost. Be careful enough! Procedure
1. Turn off power. However, if it is desired not to erase RAM contents, unplug the jumper plug JP1 on CONTROL board with keeping power on. 2. Remove the old battery. 3. Set a new battery (Type: N-50SB3, Code no.: 000-835-126) and plug in the JP1 again.
Ni-cd Battery
Control Board
JP1
Bottom, View, to cover removed Warning: RAM contents would be erased, if the jumper plug JP1 is unplugged while power supply is off.
5-5
5.4
Exchanging ROM
Confirmation of ROM version
1. In the normal display, press keys:
SELECT
→
9
, then this display will appear.
V P ID DSC RT CH PO L Blinking
2. Select "V", and press
key.
ENT
ROM version RT:1.xx
DSC:1.xx
Press CANCEL three times to close the display. RT: VHF ROM version level DSC: DSC ROM version level
Remark) The ROM for DSC is U4 on CONTROL board and the ROM for VHF is contained in the CPU (HD6475328CP (H8/532)) U2 on CONTROL board. • DSC ROM version 05501-92-10X • VHF ROM version 05501-93-10X ROM location
Remove the bottom cover by unscrewing four screws on the bottom of the main unit.
NMI Switch (S1)
ROM (U4)
Control Board
Bottom view, cover removed
5-6
Setting after exchanging ROM
After exchanging ROM , be sure to clear RAM as follows. 1. Turn on FM-8700. Then, this "Clear display" will appear and "RAM" flashes. Clear < RAM all area NO
RAM
EEROM
>
ALL
Blinking
2. Press ENT key. After a while this message will be displayed on LCD. Then, turn off the power switch of the main unit. Turn off the power
3. Switch on the power switch again. When this normal display appears, the RAM has been cleared. watch
VHF
ch70
auto
Details about RAM, EEROM and ALL are described on the following page.
5-7
5.5
About NMI switch
To clear contents of S-RAM and EEROM, press S1 (NMI switch) on CONTROL board with keeping power supply on. For the location of S1, refer to Page 5-6. Procedures
1. Turn on power, and press NMI switch. 2. Once turn off the power. 3. Turn on the power again, then this display will appear. Clear < NO
RAM
> EEROM
ALL
4. Select a desired item by using the arrow key, and press ENT key. 5. If "RAM" is selected, "Turn off the power" will be displayed. Then, turn off the power. If "EEROM" or "ALL" is selected, "NOW WRITING EEROM" will be displayed. About 15 seconds later the display will change to "Turn the power off", then turn off the power. 6. Turn on the power again. When RAM is cleared: No system resetting required. When ALL or EEROM is cleared: TEST VHF ch70 manual
Test mode
If required, set the system referring to Chapter 3. After setting the system, be sure to set "Protection menu" to ON and return to the normal mode.
5-8
About "RAM", "EEROM", and "ALL". Item
Purpose
RAM
Clears all contents of S-RAM (*1).
EEROM
Clears all contents of S-RAM and a part of EEROM (*2).
ALL
Clears all contents of S-RAM and EEROM.
(*1) Contents of S-RAM are: 1 2
All transmitted/received messages Contents set by pressing SELECT key → 1, 2, 4, 6.
(*2) Contents of EEROM are: 1
2
3
Contents set by pressing SELECT key → 9. (System setting data) Contents set by pressing SELECT key → 7. (Messages in the file: Messages stored in the memory after they are made) Contents set by pressing SELECT key → ALM.
Remarks) The pre-set data of channel (CH) and transmitting power (PO) remain unchanged even after "EEROM" has been cleared. That is, all the other set values are cleared -returned to the factory default values.
5-9
Chapter 6. Troubleshooting 6.1
Functional tests
For functional tests (practiced by technicians), change the display to "Test" mode. Then, select a test item from the menu and execute the selected test, e.g. ROM test. After the test has been finished, be sure to return the display to the normal mode (Watch display).
Watch
SELECT
V
P
9
ID
Select "P", then press
key.
ENT
* System protected *
6
5
2
Protection < ON
1
This is a password to display the "protection" menu.
1
1
>
OFF
Select "OFF", then press ENT key. (Now the test mode is selected.) 3
CANCEL Diagnosis <
>
ROM
DIS
1. ROM/RAM test
RMT
KEY
Test Menu PRT 5. Printer test
2. Remote line test 3. Keyboard test
4. Display (LCD) test
Select test desired with the arrow keys,then press
6-1
ENT key.
1. RAM/ROM test ROM/RAM test <
>
test:[ENT] ROM RAM EEROM
Select one, then press ENT key. ROM/RAM test <
>
ROM CHECK OK For error, NG appears.
To quit, press
ROM test takes about 10 mimutes. To return to Test menu, press
CANCEL
key.
Parts number for RAM and ROMs are; ROM: U4 RAM: U5 EEROM: U8
6-2
ENT
key.
2. Remote line test This test checks the remote signal line (MIF data line) for proper operation. Remote test <
>
test:[ENT] NMEA DMC RB P For factory use
VHF CPU
Select one, then press ENT key.
Remote test <
PIO
U2 (H8)
U14
DSC CPU
SIO
U3 (V25)
U12
Nav. Device (NMEA: Connection check only) DMC-5
IF-8500 (Printer I/F)
>
CONNECTION:CHECK OK
RB-700
To quit, press ENT key.
To return to Test Menu on page 6-1, press
CANCEL
key.
The following two types of test can be performed. • Remote line check inside of RB-700, DMC-5 or IF-8500 (No modification is required.) FM-8700 MIF command MIF command
TXD(H) TXD(C) RXD(H)
RXD(H) RXD(C) TXD(H)
RXD(C)
TXD(C)
RB-700, DMC-5 or IF-8500
• Interconnection check (Add jumper wires as shown below.) FM-8700 MIF command MIF command
Jumper wires added
TXD(H)
RXD(H)
TXD(C) RXD(H) RXD(C)
RXD(C) TXD(H) TXD(C)
6-3
RB-700, DMC-5, IF-8500 or Nav. Device
3. Keyboard test Keyboard test <
>
[ANY KEY]
Press keys and controls one by one. The number (or character) corresponding the key and controls pressed appears if key is functioning correctly. When pressing and holding down the CHANNEL control, three LEDs (USAA/WX/PRIV) blink in order. (When pressing the DISTRESS or ALARM STOP key, the LEDs near the key light.)
To quit, press
CANCEL or
ENT key. The Test Menu on page 6-1 appears.
4. Display (LCD) test Display test <
>
test:[ENT] ENT
LCD blinks if it functions correctly.
To quit, press CANCEL or
ENT key. The Test Menu on page 6-1 appears.
6-4
5. Printer test FM-8700 DSC CPU
Print out test
U3 (V25)
test:[ENT]
Serial data (TXD/RXD)
The test data (numerals and characters) is printed out.
Now doing
To quit, press CANCEL key several times.
Test
How to return to the normal (watch) mode Test
SELECT
P
9
ID
Select "P", then press
Protection < ON
Parallel data
(SIO incorporated)
ENT
V
IF-8500
key.
ENT
> OFF
Select "ON", then press ENT
key.
To return to the normal display, press CANCEL key twice.
6-5
PP-510
6.2
Error messages
1. CPU communication errors If a communication error occurs between the two CPUs (U2: CPU for VHF, U3: CPU for DSC) on CONTROL board, one of the following messages will appear. *Error* CPU communication
One of three messages in the table below appears.
Error TYPE: 1 (no change to in)
Meanings
Remedy
The port in U2 does not change to an
After pressing CANCEL key, try the
input port.
same operation again (e.g. press TEST
TYPE: 2 (no ack/time out)
After
CALL
key for DSC has
been pressed, U2 does not send the command of transmission end to U3 within 5 seconds.
key for DSC) from U3,
U2 does not send back any response to U3 within 5 seconds. TYPE: 3 (no initialize)
still unchanged, try again after resetting power once more. Then, if the error still continues, clear the contents of RAM or EEROM.
After U2 has received a test request ( TEST
key). If the symptom is
When power has been turned on, or a system setting has been changed, U2 cannot read correct data.
6-6
-----> Refer to Page 5-8.
6.3
Confirmation by line monitor
By using line monitor function, this test checks whether each AF line signal is coming in TX board. The rated level of MOD input to TX board is 35mVrms (600Ω). The system diagram of the line monitor is shown below. TX Board MOD
RX Board W-MIC Wing Handset
MIC SEC
R153
U9 W-MIC
U30-3/4 LINE MON on/off selected on system setting RT-4.
MIC Handset R154
SP Volume
MIC
MODEM DSC R155
MODEM
REMOTE Remote (RB-700)
R156
REMOTE
Control Board
To output the line monitor, set "RT4-TX AF monitor " to "ON". (Refer to "Setting RT" in Section 3 "System setting" on Page 3-6.) Refer to Section 3.3 for the procedure. Note that the handset of the main unit cannot be monitored even if the TX AF monitor is made ON. After all the AF LINE inputs have been confirmed, return the setting to OFF.
Remarks) When confirming the AF line for DSC, change VHF power to "reduced" and connect a dummy load of 50- Ω to TX ANT. Compose a message and call by assuming that the message is individual call, the category is routine, and the address is the ID number of the own ship.
6-7
6.4
Guidelines for troubleshooting
Remarks) Before starting inspection : 1. Confirm that the input voltage is DC 21.6 - 31.2 V. 2. Check the cable connection with external devices and connectors in the main unit. 3. Practice self-test.
Warning A high voltage is applied in the apparatus. When checking inside, be sure to turn off the power supply. The mark * indicates a NG or error message in self-test. No.
Symptoms
1
Power is not turned on.
2
Transmitting output is much reflected.
Possible causes
Remedies
1. The power input voltage is too low (less than 18 V), or too high (more than 32 V).
Adjust it to the specified value.
2. The power breaker is off.
Check the breaker on the rear of the main unit.
3. The power circuit board is defective. Confirmation) • Check the power switch. • Check the output voltage. (+15V)
Exchange the power board.
4. The output lines from the power board (+15 V) is short-circuited. Confirmation) • Disconnect external devices. • Disconnect the power supply connectors in the main unit one by one.
Repair the short-circuited portion, or exchange the shortcircuited board.
1. The coaxial cable connector of the transmitting ANT is defective.
Check bad contact of the coaxial cable connector and soldering. Rectify them.
2. The coaxial cable of the transmitting ANT is defective.
Check any leak of water. Exchange the cable, if any.
3. The transmitting ANT is defective. Confirmation) • Replace it with the receiving ANT and compare.
Exchange the ANT.
4. Location of the transmitting ANT is bad. Confirmation) • Check whether the location is close to other structural objects or not.
Change the location of antenna.
6-8
No.
Symptoms
Possible causes
Remedies
3
Exchange the duplex unit. The difference in output 1. The duplexer is defective. Confirmation) power is big between • Check that the difference in power data DUP and SIMP between DUP and SIMP is less than 100. * DX-8700 : NG * TRANSMIT 2. The duplexer switching circuit is defective (bad Exchange the CH70 RX POWER : NG board. contact of K1 and K2 of CH70 RX board).
4
The transmitting range is short.
1. The transmitting power is low. Confirmation) • Check that the power is the rated value of 25 W. * TRANSMIT POWER : NG
Adjust the power. (Refer to "Setting PO" in Chapter 3 "System setting".)
2. The power loss in DX-8700 is big. Confirmation) • Compare the transmitting output from the main unit and that from DX. * DX-8700 : NG
Check about Symptom 2.
3. The transmitting PA module IC (U1: M57710A) Exchange the PA module or the TX board. is defective. * TRANSMIT POWER : NG
5
The transmitting power does not output.
4. The Location of the transmitting ANT is bad.
Check about no. 4 in Symptom 2.
1. The transmitting synthesizer PLL circuit is defective. Confirmation) • Check that the CR11 on the TX board is off, UN-LOCK. (TX PCB: PLL Lock)
Exchange the TX board.
2. The PA IC module or the transmitting amplifier Exchange the TX board. circuit is defective. * TRANSMIT POWER : NG 6
Modulation does not work. 1. Main unit handset 2. Wing handset 3. Remote 4. DSC
1. The main unit handset is faulty, or the modulating circuit on TX board is defective. Confirmation) • Check, with line monitor function, whether the signal is coming in or not.
Exchange the main unit handset, or exchange the TX board.
2. The wing handset is faulty, or the modulating circuit on TX board is defective. Confirmation) • Check, with line monitor function, whether the signal is coming in or not. • Check the MIC SELECT circuit on CONTROL board with carbon and dynamic microphone.
Exchange the wing handset, or exchange the TX board if the monitoring is possible.
3. The remote station RB-700 is faulty, or the modulating circuit on TX board is defective. Confirmation) • Check, with line monitor function, whether the signal is coming in or not.
Exchange the RB-700, or exchange the TX board if the monitoring is possible.
4. The CONTROL board is faulty, or the modulating circuit on TX board is defective. Confirmation) • Check, with line monitor function, whether the signal is coming in or not.
Exchange the CONTROL board, or exchange the TX board if the monitoring is possible.
6-9
No.
Symptoms
7
Receiving sensitivity is bad.
8
9
10
11
12
Possible causes 1. The receiving ANT system is faulty. Confirmation) EReplace the transmitting ANT with the receiving ANT and compare in the same manner as no. 1, 2, 3, 4 in Symptom 2 .
Remedy as Symptom 2.
2. The duplexer is defective if DUP and SIMP channel is different in receiving sensitivity.
Exchange the duplexer.
3. The receiving circuit is faulty.
Exchange the RX board.
Receiver noise does not 1. The receiving AF amplifier circuit is defective. Confirmation) come out if SQ is OFF. • Check it with EXT SP. Remark) SQ is not • Check it with handset SP. AUTO. • Check it with INT SP.
Receiving on CH70 is bad. * DSC cannot be received.
Keyboard does not work.
Remote function does not work. * VHF is controlled through DSC.
Printer does not work.
Remedies
Exchange the RX board if no noise comes out in all cases.
2. The audio volume is defective.
Exchange the audio volume.
3. SQ circuit is faulty. SQ volume is defective.
Exchange the RX board. Exchange the SQ volume.
4. The receiving synthesizer PLL circuit is defective. Confirmation) • Check that the CR2 on the RX board is off and UN-LOCK. * RX PCB: NG
Exchange the RX board.
1. The receiving ANT system is faulty. Confirmation) • Replace the transmitting ANT with the receiving ANT and compare in the same manner as no. 1, 2, 3, 4 in Symptom 2 .
Remedy as Symptom 2.
2. CH70 RX board is defective. Confirmation) • Practice self-test. * CH70 RX PCB: NG
Exchange the CH70 RX board.
1. The panel board or CONTROL board is defective if all keys do not work.
Exchange the panel board or CONTROL board.
2. The panel board is defective if specific keys do not work.
Exchange the panel board.
Communication between the CPU for VHF and the CPU for DSC is faulty. TYPE 1: No change to in * TYPE 2: No ack/time out TYPE 3: No initialization Refer to Section 6.3 "Error messages"
Clear the RAM and EEROM, and if the function does not recover, exchange the CONTROL board.
Main unit, the printer, or IF-8500 is defective. Confirmation) 1 Check the printer itself whether it is regular or not. 2 If installed, check whether the IF-8500 is normal or not, by way of NBDP, MF/HF DSC, and IF-8500.
Exchange the CONTROL board.
6-10
Refer to Section 5.5 "NMI switch" for clearing RAM and EEROM.
6.5
Board compatibility
Board compatibility exists between FM-8500 and FM-8700 as below. Type PC Board
Compatibility FM-8700
FM-8500
Power Board
05P0617
05P0617
Yes
Panel Board
05P0615
05P0615
Yes
TX Board
05P0618A
05P0618
05P0616A
05P0616
Remarks
FM-8700→8500: Yes FM-8500→8700: No
CONTROL Board
Yes
Board level must be –33 and above.
JP-3, 4 (w/jumper)
JP-3, 4 (w/o jumper)
DSC ROM
U4: 05501-92-10X
U4: 05501-82-10X
No
M27C4001
VHF CPU
U2: 05501-93-10X
U2: 05501-83-10X
No
HD642538CP/H8
Location of parts on CONTROL board U4: DSC ROM
U2: VHF CPU
BATT U8: EEROM
05P0616A
JP-3
JP-4
FM-8500: No Jumper FM-8700: Jumper
No Jumper Jumper
The CONTROL board 05P0616 can be changed to 05P0616A, by putting jumpers on JP3 and JP4, and changing DSC ROM and VHF CPU.
6-11
AP1-1
AP1-2
AP2-1
AP2-2
AP2-3
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