RB1100 Repair Manual

TroubleShooting for RB1100r3 These repair instruction are for NON WARRANTY repairs only! Please make visual inspection for signs of corrosion or mechanical damages before starting

No power, blue LED is not lit NOT OK

Check Schottky diode D1101 OK

Change faulty diode

NOT OK

Check PNP transistor Q1101 and Zener diode D1104

Change faulty components

OK

Check Zener diode D1103

NOT OK

NOT OK

Check P-channel MOSFET Q1102

Change faulty MOSFET

NO T

OK

O K

Change faulty Zener diode

NO 5.0V

Check 5.0V output on NPN transistor Q1105 pin#3

Check Zener diode D1106

O

K

OK

Change faulty transistor Q1105

NOT OK

Check resistor R1149 resistance. It should be 10 Ohm OK

Change faulty resistor

NOT OK

Check Buck controller U1101 OK

Change faulty controller

NOT OK

Check N-channel MOSFETs Q1103, Q1108 and Q1109 OK

Change faulty MOSFETs

NOT OK

Check ferrite bead FB1101 resistance. It should be less than 1Ohm

Change faulty ferrite bead

Problem still appears

The board is unrepairable

PoE does not work NOT OK

Check Ethernet connector J5 OK

Change faulty connector

NOT OK

Check Rectifier Bridges D1102, D1105

Change faulty Bridges

Problem still appears

The board is unrepairable

FAN does not work NOT OK

Change faulty FAN

OK

Check FAN

NO 12V

NOT OK

Check ferrite beads FB807, FB808 resistance. It should be less than 1 Ohm

OK

Check 12V output, for example on C1416 pins

NOT OK

Change faulty diode

OK

Check Schottky diode D1401

Change faulty Step-Up DC-DC converter U1402

Problem still appears

The board is unrepairable

Change faulty ferrite beads

RB does not boot, green and blue LEDs are lit NO 2.5V Check 2.5V output, for example on C1485 pins OK

Change faulty LDO U1410

NO 1.0V Check N-channel MOSFETs Q1405, Q1406

OK

Check 5.0V output on NPN transistor Q1401 pin#3

OK

Change faulty Buck controller U1406

Change faulty NPN transistor Q1401 and Zener diode D1402

Change faulty MOSFETs

OK

Check resistor R1165 resistance. It should be 10 Ohm

OK

Change faulty Buck controller U1102

NOT OK

NOT OK

NO 1.8V Check 1.8V output, Check N-channel Dual for example on C1135 pins MOSFET Q1104

OK

OK

NOT OK

NOT OK

Check 1.0V CPU core output, for example on C1462 pins

Change faulty MOSFET

Change faulty resistor

NO 0.9V Check 0.9V output on Termination Regulator U1103 pin#4 OK

Change faulty Termination Regulator

NO 66MHz clock

Check 66MHz CPU clock on oscillator Y4 pin#3

Change faulty oscillator

Problem still appears

The board is unrepairable

Ethernet port1 (J5) does not work, drop ping packets NOT OK

Change faulty transformer

OK

Check Transformer TR5

Check voltage drop between D501, D503 pin#1 and Ground. This value should be in the range from 0.3V to 0.35V measured in diode mode (hold “positive” wire on the ground and “COM” wire to D501 pin#1)

NOT OK

Change faulty diodes arrays and Ethernet PHY U501

OK

NOT OK

OK

Check ferrite bead FB505 resistance. It should be less than 1 Ohm

NO

Check 125MHz clock on resistor R775 pins

5 12

Change faulty ferrite bead

MH

z

Change faulty PLL clock driver U702

OK

NO 125MHz

OK

Check 125MHz clock on crystal oscillator Y702 pin#3 NOT OK

Check ferrite bead FB5 resistance. It should be less than 1 Ohm OK

Change faulty ferrite bead

NO 25MHz

Check 25MHz clock on crystal Y502 OK

Change faulty crystal

NO 25MHz

Change faulty crystal

OK

Check 25MHz Ethernet clock on crystal Y501

Try to change Frequency generator U502 Problem still appears

The board is unrepairable

Change faulty crystal oscillator

Ethernet port2, 3 (J601) do not work, drops ping packets NOT OK

Change faulty Ethernet port J601

OK

Check connector J601 for mechanical damages

NOT OK

Change faulty diode arrays

OK

Check voltage drop between D601, D603 (for port2), D605, D607 (for port3) pin#1 and Ground. This value should be in the range from 0.3V to 0.35V measured in diode mode (hold “positive” wire on the Ground and “COM” wire to one of diode array pin#1, for example to D601 pin#1)

NOT OK

Check ferrite bead FB603 resistance. It should be less than 1 Ohm OK

Change faulty ferrite bead

NO 25MHz

Check 25MHz clock on crystal Y601

Change faulty crystal

OK

For Port 2

OK

Change Ethernet Gigabyte NIC U601

NOT OK

Check ferrite bead FB605 resistance. It should be less than 1 Ohm OK

NO 25MHz

Check 25MHz clock on crystal Y602 OK

For Port 3

Change faulty ferrite bead

Change Ethernet Gigabyte NIC U602

Problem still appears

The board is unrepairable

Change faulty crystal

Ethernet port4-8 (J901-J905) do not work, drops ping packets NOT OK

Change faulty diode arrays

OK

Check voltage drop between diodes arrays D901, D904, D905, D907, D909, D911, D913, D915, D917, D919 pin#1 and Ground. This value should be in the range from 0.2V to 0.25V measured in diode mode (hold “positive” wire on the Ground and “COM” wire to one of diode array, for example to D901 pin#1)

NOT OK

Check termination resistance between Tx and Rx line in the connectors J901-J905. It should be 150 Ohm +/-2% OK

Change faulty Ethernet connectors

NOT OK

Check ferrite beads FB901, FB902, FB903, FB904, FB905 resistance. Each resistance should be less than 1 Ohm OK

Change faulty ferrite beads

NO 1.6V

Check ferrite beads FB1403, FB1405 resistance. Each resistance should be less than 1 Ohm

OK

Change faulty DC-DC Step Down Converter U1405

OK

NOT OK

Check 1.6V output, for example on C1443 pins

Change faulty ferrite beads

NO 1.05V

Check ferrite beads FB1411, FB1412 resistance. Each resistance should be less than 1 Ohm

OK

Change faulty DC-DC Step Down Converter U1408

OK

NOT OK

Check 1.05V output, for example on C1477 pins

Change faulty ferrite beads Change faulty 6-port GbE Switch U9 OK

Check ferrite beads FB1001FB1006 resistance. Each resistance should be less than 1 Ohm

Check 25MHz Ethernet clock on crystal Y9 pins

OK

NO T

NO

25 MH z

OK

Change faulty crystal Change faulty ferrite beads

Problem still appears

The board is unrepairable

Ethernet port9-13 (J701-J705) do not work, drop ping packets NOT OK

Change faulty diode arrays

OK

Check voltage drop between diodes arrays D701, D703, D705, D707, D709, D711, D713, D715, D717, D719 pin#1 and Ground. This value should be in the range from 0.2V to 0.25V measured in diode mode (hold “positive” wire on the Ground and “COM” wire to one of diode array, for example to D701 pin#1)

NOT OK

Check termination resistance between Tx and Rx line in the connectors J701-J705. Each resistance should be 150 Ohm +/-2% OK

Change faulty Ethernet connectors

NOT OK

Check ferrite beads FB701, FB702, FB703, FB704, FB705 resistance. Each resistance should be less than 1 Ohm OK

Change faulty ferrite beads

NO 1.6V

NOT OK

Check ferrite beads FB1403, FB1405 resistance. Each resistance should be less than 1 Ohm

Change faulty DC-DC Step Down Converter U1405

OK

NOT OK

Check 1.6V output, for example on C1443 pins

Change faulty ferrite beads

NO 1.05V

OK

Check ferrite beads FB1409, FB1410 resistance. Each resistance should be less than 1 Ohm

Change faulty DC-DC Step Down Converter U1407

NOT OK

Check 1.05V output, for example on C1469 pins

OK

Change faulty ferrite beads

O

K

Change faulty 6-port GbE Switch U701

Check 25MHz Ethernet clock on crystal Y701 pins

NO

25 M Hz

OK

Problem still appears

OK T NO

Check ferrite beads FB801- FB806 resistance. It should be less than 1 Ohm

Change faulty crystal Change faulty ferrite beads

The board is unrepairable

Reference number

Part Number

Manufacturer

Description

D501, D503, D601, D603, D605, D607, D701, D703, D705, D707, D709, D711, D713, D715, D717, D719, D901, D904, D905, D907, D909, D911, D913, D915, D917, D919

AOZ8000CIL

Alpha & Omega

IC TVS ARRAY LOW-CAP SOT23-6

D1101

SK36-T3-LF

Won-Top Electronics Co., Ltd.

Diode Schottky 60V 3A SMC

D1102, D1105

DF02S

Diodes Incorporated

1A 200V Rectifier Bridge

D1103

BZX84C10-T1-LF

Won-Top Electronics Co., Ltd.

Diode Zener BZX84C 10V 5% 225mW SOT23

D1104

BZX84-B27,215

NXP Semiconductors

Diode Zener BZX84B 27V 2% 350mW

D1106

BZX84-C5V6,215

NXP Semiconductors

Diode Zener BZX84C 5.6V 5% 350mW

D1401

SX36-T3-LF

Won-Top Electronics Co., Ltd.

Diode Schottky 60V 3A SMA

FB5, FB603, FB605, FB701-FB705, FB801FB806, FB901-FB905, FB1001-FB1006

BLM15AG121SN1D

Murata manufacturing Co.

Ferr Chip Beads 120 Om 500mA, 0402, FB120

FB506, FB604, FB606

BLM15AG121SN1D

Murata manufacturing Co.

Ferr Chip Beads 120 Om 500mA, 0402, FB120

FB807, FB1405

BLM18SG121TN1D

Murata manufacturing Co.

Ferr Chip Beads 120Ohm, 3.0A, 0603

FB808

BLM18EG221SN1D

Murata manufacturing Co.

Ferr Bead 220 Ohm, 2A, 0603

FB1101

FBMA-11-453215900A90T

King Core Electronics Inc.

Ferr Bead 90 Ohm, 9A, 4mOhm, 1812

FB1403, FB1409, FB1411

BLM18PG331SN1D

Murata manufacturing Co.

Ferr Chip Beads 330 Om 1200mA, 0603

FB1410, FB1412

RC0603JR-070RL

Yageo Corporation

Resistor 0R 5% 0603

J5

8108-B114

Powerway Electronics Co., LTD.

RJ45 with LEDs (G/Y) Tab down,presoldered shielding pins

J601

AR6-2DHD-1234-B

Super Link Electronics Co, Ltd

1x2 RJ45 tab up, w/o transformer, with LEDs (Green/Yellow), with presoldered shielding pins

J701-J705, J901-J905

ARB-1FAK-F235-B

Super Link Electronics Co., Ltd.

RJ45 Ethernet connector 10/100/1000 magnetics(Gigabit), LEDs(G/Y)

Q1101

BC856B,215

NXP Semiconductors

Small Sign PNP 250mW SOT-23 Transistor

Q1102

AO4441

Alpha & Omega

P-Ch MOSFET -60V -4A 100mOhm SO-8

Q1103, Q1108, Q1405, Q1406

AO4484

Alpha & Omega

N-Ch MOSFET 40V 10A 10mOhm SO-8

Q1104

AP9960GM

Advanced Power Electronics Corp.

N-channel Dual MOSFETs,Vds = 40V, Id = 7.8A, Rdson = 20mOhm, SO-8

When you order components for repairing router boards from our sales, please, write components reference number not a part number

Reference number

Part Number

Manufacturer

Description

Q1105, Q1401

BCX5616TA

Diodes Zetex Limited

Trans NPN, 80V,2A,1W, hfe=100-250, SOT89

Q1109, Q1407

AO4484

Alpha & Omega

N-Ch MOSFET 40V 10A 10mOhm SO-8

R1149, R1165

RC0402FR-0710RL

Yageo Corporation

Resistor 10R 1% 0402

TR5

APL-076

ACUWA AH KE HUA TEHNOLOGY INC.

10/100/1000 Transformer with PoE support

U9, U701

AR8316-AK1E

Atheros Technology Ltd.

6-port GbE Switch

U501, U601, U602

AR8131-AL1E-R

Atheros Technology Ltd.

AR8131, QFN48-04MM, Gbe NIC, PCIe, 3V T&R

U502

ICS9FG108DGLFT

IDT

Frequency Generator for CPU, QPI, FBD, PCIe & SATA, TSSOP48

U702

CDCVF2505PWR

Texas Instruments

PLL clock driver 1-to-5, TSSOP-8

U1101, U1102, U1406

RT8209BGQW

Richtek Technology Corporation

Synchronous Buck Controller,Vin=4.5...26V, WQFN14L_3.5x3.5

U1103

AIC1384-GSHTR

U1402

RT9297GQW

Richtek Technology Corporation

WDFN-10L_3x3, Vin=2.6...5.5V, Vout_max=24V, Ilim=3A, f=0.64MHz|1.2MHz

U1405, U1407, U1408

RT8058GQW

Richtek Technology Corporation

1MHz, 2A, Step-Down DC/DC Converter, WQFN-16L 3x3, Green

U1410

RT9183HPS

Richtek Technology Corporation

1.5A Adj LDO SO8

Y4

FN6660077

PSE Technology Corporation

Crystal Oscillator 66.666MHz 25ppm 3.3V 15pF -55+125 7x5

NSK Jenjaan Quartek Corporation

Crystal 25MHz 30ppm 20pF -10+70 HC-49 (SMD) H=3.2mm

PSE Technology Corporation

Crystal Oscillator 125MHz 30ppm 3.3V 15pF -40+125 5x3.2mm

Y9, Y501, Y502, Y601, NXE25.000AC20F-AHF Y602, Y701 Y702

FDC500018

ANALOG INTEGRATIONS DDR2 Termination Regulator, PSOP-8 CORPORATION

When you order components for repairing router boards from our sales, please, write components reference number not a part number

RB1100r3 Reference picture

RB1100r3 Reference picture

RB1100r3 Reference picture

RB1100r3 Reference picture

RB1100r3 Output Voltage picture

RB1100r3 Output Voltage picture

RB1100r3 Output Voltage picture