FE170CG CSC RF Trouble Shooting Guide

 

FE170CG RF Hardware T Trouble rouble Shoot Shooting ing u e

 

Outline •

Test Equipment

•

2G/3G function

•

WiFi/BT/GPS WiFi/BT /GPS Function

 

Test Equipment Anritsu 8820B(C) (Agilent 8960)

電表

 

2/3G Block Diagram Main Board

Transceiver  WCDMA Rx

GSM Rx

Ant. S W

GSM Tx Quad-Band

WCDMA Tx WCDMA four-Band (1,2,5,8)

Main Antenna

 

Placement Top View

BT/WiFi

BottomVie View w

GPS GP S

2/3G

 

RF Block Block Diagra Diagram(B m(Bott ottom) om)

Transceiver

3G TRX ANT SW

GSM GSM WCDMA TX ANT Connector

 

GSM Quad Ba Band Tx Path

2G High Band TX Out

2G High Band TX In

2G Low Low Band TX Out

2G Low Low Band TX In

 

GSM Quad Ba Band Tx Path ANT SW

Coupler

MMPA

2G Low Low Band TX In

2G High Band TX In

ANT Connector

Series comp.

 

GSM Quad Band Rx Path EGSM RX 2G EGSM

2G GSM850 RX

 

GSM Quad Band Rx Path 2G PCS RX

2G DCS RX RX

 

GSM Quad Band Rx Path Transceiver

GSM 850

GSM EGSM

GSM DCS

ANT SW

GSM PCS

Coupler

ANT Connector

Series comp.

 

WCDMA Tx Path B1TX

B2TX

 

WCDMA Tx Path B5TX

B8TX

 

WCDMA Tx Path B2

B1

B8 B5

ANT SW

C6511 3G Low Low Band TX In

Coupler

C6508 3G High Band TX In ANT Connector

Series comp.

 

WCDMA Rx Path B1 RX

B2 RX

 

WCDMA Rx Path B5 RX

B8 RX

 

WCDM WC DMA A Rx Path Path Transceiver

B5

B2

B8

ANT SW

B1

Coupler

ANT Connector

Series comp.

 

Phone Function Test Procedure Phone Functi Function on T est Process

Insert Tes t SIM & Check Tester Status

Test Complete

Make call

No

Check  Antenna Connection Status ange necessary)& Make   a call No

Check the power @ ea ch test point in in

Connect  ph on e a nd

TX TX/RX /RX path a nd change com po ponent nent

tes ter wi with th cable &RF

Yes

Change Phone Antenna

make call

No

Check each component @ TX/RX pa th

No

Check TX  po we r with  ph on e to ol

Re-download OS im image age & Re-calibration

 

RF Features •

BT/G BT /GPS PS Modu Module le:: BCM2 BCM207 076 6  – 

•

BT/GPS/GNSS

WiFi Module: BCM43362  – 

IEEE 802.11b/g/n

 

BT/WiFi/GPS Block Diagra Diagram m Main Board

Main Board 2.4GHz

Band Pas s Filter 

S AW

Switch

LNA LN A

S AW

GPS GP S

Antenna

Antenna

BCM43362

BT/GPS BCM2076

BT/GPS BCM2076

U6705/U4202/U4201/U4101/U4402

 

U6703/U6702/U6701/U4402

 

RF Block Diagram GPS S GP ANT

WIFI/BT Spring

BPF

Switch

TCXO

GPS GPS SAW SA W

BT/GPS WiFi BCM43362

BCM2076

GPS LNA LN A

GPS GP S SAW SAW

 

GPS Path

確認GPS Path 是否掉

 

WiFi Path

確認WiFi Path 是否掉

 

BT/WiFi BT/W iFi Repair Test Procedure Procedure Replace Repl ace the W iFi iFi Module U4101

Yes

Check the s ig ig na na l B PF PF is norm norm al

Replace the Replace the BT /GPS Modul Modulee U4402

Yes

Can BT/W BT/WiFi iFi Function Work  normally?

Turn On De vi vice ce

No

Check  BT/WiFi Trace

Check the signal Switch Switch is normal

Yes

Yes Yes

Test Complete

RF IO Signa l iiss  Norma ll lly y or   Not

No

No

No

No

 

GPS Repair Test Procedure Replace the BT/GPS Module U4402

Yes

Check the Signal LNA is  Norma l

Yes No

Turn On Device

C he he c k th e Device Can Re ceiv ceivee Correct Corr ect C/N

No

Yes

GPS Test Complete

Check the G P S t rraa c e and Antenna Pattern

 

Yes

No

Check the Signal SAW is  Norma l

 

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