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1255-3646 Rev1 Page 1  Sony Ericsson Mobile Communications AB – Company Intern

1255-3646 Rev1 Page 1  Sony Ericsson Mobile Communications AB – Company Internal Troubleshooting Guide - electrical - ST18i, ST18a, SO-03c, Xperia TM Ray Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 2(15) CONTENTS 1 Troubleshooting Flow ...................................................................... 3 1.1 Display ................................................................................................... 3 1.2 Illumination ............................................................................................ 4 1.3 Keys & Sensors ..................................................................................... 5 1.4 Alert ...................................................................................................... 6 1.5 Audio ..................................................................................................... 7 1.6 On/Off .................................................................................................... 8 1.7 Charging & Capacity ............................................................................. 9 1.8 SIM ....................................................................................................... 10 1.9 Camera ................................................................................................ 11 1.10 Data Communication .......................................................................... 12 1.11 Memory Stick ...................................................................................... 13 1.12 Network & Signal ................................................................................ 14 2 Revision History ............................................................................. 15 For general information about troubleshooting, refer to 1220-1336: Generic Repair Manual - electrical Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 3(15) 1 Troubleshooting Flow 1.1 Display Symptom: Replace: Display problem X7002, if damaged vision check all pins Z9800, Z9801 or Z9802 Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 4(15) Troubleshooting Flow 1.2 Illumination Symptom: Replace: No Display illumination X7002, if damaged vision check pin B1,B2 and B7 L7600, if more than 1 Ω V7601 Symptom: Replace: No Key Back Light X9800, if damaged vision check pins B7-B9 and A8-A9 Symptom: Replace: No Flash LED X9800, if damaged vision check pins B28 and A8-A9 Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 5(15) Troubleshooting Flow 1.3 Keys & Sensors Symptom: Replace: On / Off key problem X9800, if damaged vision check pin B29-B30 Symptom: Replace: Home Key problem X9800, if damaged vision check pin B11 Symptom: Replace: Back Key, Menu Key Display Touch Sensor problem X7002, if damaged vision check pins A13-A17, B13-B17 Symptom: Replace: Volume Up key problem X9800, if damaged vision check pin B12, B14 Symptom: Replace: Volume Down key problem X9800, if damaged vision check pin B13, B14 Symptom: Replace: Proximity sensor problem X9800, if damaged vision check pins B19-B22 N5500 Symptom: Replace: Ambient Light Sensor problem X9800, if damaged vision check pins A21-A22 Symptom: Replace: Compass problem N5400 Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 6(15) Troubleshooting Flow 1.4 Alert Symptom: Replace: Vibrator problems X9800, if damaged vision check pin A11-A12 Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 7(15) Troubleshooting Flow 1.5 Audio Symptom: Replace: No audio L1001, if more than 1 Ω Symptom: Replace: No Primary Microphone X9800, if damaged vision check pin A2, A4 and A5 Symptom: Replace: No Secondary Microphone L2852 or L2853, if more than 3 Ω B3502 Symptom: Replace: No or bad Earphone / Ear speaker X9800, if damaged vision check pin A28 and A29 Symptom: Replace: No or bad Loudspeaker X9800, if damaged vision check pins B2-B5 V3500, if pin1 or pin 2 is short circuit to GND N3501 Symptom: Replace: No or bad Hands-free (PHF) Microphone X9800, if damaged vision check pin A19,B15,B17 L3100 or L3604, if more than 2 Ω Symptom: Replace: No or bad Hands-free (PHF) Aux Earphone / Ear speaker X9800, if damaged vision check pin A15, A17, B15 L3602 or L3603, if more than 2 Ω Symptom: Replace: No Hands-free (PHF) Microphone – Phone not recognizes PHF set X9800, if damaged vision check pin B16, B17 L3100, if more than 2 Ω Symptom: Replace: No or bad FM Radio X9800, if damaged vision check pin B15 V3100 N8102 Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 8(15) Troubleshooting Flow 1.6 On/Off Symptom: Replace: Current draw greater than 300 mA N2801, if getting hot N2903, N2900 or N2902, if getting hot Symptom: Replace: Current draw when powered off N2801, if getting hot N2903, N2900 or N2902, if getting hot Symptom: Replace: Using no current when On/Off key is pressed and will not start. X9800, if damaged vision check pin B29-B30 Symptom: Replace: Draws current when On/Off key is pressed, returns to zero L1000, L1003, L1004 or L2400, if more than 1 Ω Symptom: Replace: Other X1300, if damaged vision check all pins Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 9(15) Troubleshooting Flow 1.7 Charging & Capacity Symptom: Replace: No or bad Charging from USB X2200, if damaged vision check pin 1 and 5 C2200, if X2200 pin 1 is short circuit to GND X1300, if damaged vision check all pins N1310 N1303 Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 10(15) Troubleshooting Flow 1.8 SIM Symptom: Replace: SIM not detected X9800, if damaged vision check pin A24, A26, B24 and B26 V4001, V4002 or V4003, if short circuit to GND Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 11(15) Troubleshooting Flow 1.9 Camera Symptom: Replace: Main Camera problems X7301, if damaged vision check all pins L1002, if more than 1 Ω Z9803, Z9804 or Z9805 Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 12(15) Troubleshooting Flow 1.10 Data Communication Symptom: Replace: No communication via the USB Connector, charging via USB connector is working X2200, if damaged vision check pin 2 and 3 N2200 or Z2200 if damaged Symptom: Replace: Bad Bluetooth ,WLAN and no GPS connection X8402, if damaged X8401, if more than 1 Ω between term A and C Symptom: Replace: Bad Bluetooth and WLAN connection Z8001 or Z8402 Symptom: Replace No Bluetooth and / or WLAN connection N8102 Symptom: Replace: No GPS connection Z8401, Z8402 Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 13(15) Troubleshooting Flow 1.11 Memory Stick / Card Symptom: Replace: Memory stick / Card (micro SD) not detected X4100, if damaged vision check pin all pins V4100 Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 14(15) Troubleshooting Flow 1.12 Network & Signal Symptom: Action: Phone fails to lock on to network during radiated (wireless) Go/ No Go test Use RF probe to perform conducted Go / No Go test Symptom: Check: Replace: Action: Phone passes conducted (RF cable) Go / No Go test but fails radiated (wireless) Go / No Go test X2802, X8404, X8405, X8406 and X8407 for damage and replace, if necessary X2801 for damage and replace, if the more than 1 Ω between A and C term RF Antenna ,Sub PCB or Antenna RF Cable Rerun the phone through radiated (wireless) Go / No Go testing Symptom: Action: Phone fails conducted (RF probe) Go / No Go test Run the calibration routine Symptom: Action: Fails conducted (RF probe) Go/No Go test, but passes calibration Rerun the phone through Go/No Go testing Symptom: Check: Replace: Fails any part of the calibration routine X2801 for damage and replace, if the more than 1 Ω between RF probe and C term or A and C term is short circuit when the probe is inserted. N2803, if GSM Rx fault N2803, if WCDMA Rx fault V9830, N2801 or N2803, if GSM Tx fault N2900 or N2803, if WCDMA Tx band 5 or 8 fault N2903 or N2803, if WCDMA Tx band 1 fault N2902 or N2803, if WCDMA Tx band 2 fault Trouble Shooting Guide Repair Instruction Electrical/Trouble Shooting Guide, Electrical/ 1255-3646 Rev1  Sony Ericsson Mobile Communications AB – Company Internal 15(15) 2 Revision History Rev. Date Changes / Comments 1 2011-Aug-11 Released uploads/Management/ troubleshooting-guide-electrical.pdf