Sony Ericsson W710 Trouble Shooting Guide

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Page 1

Trouble Shooting Guide, Electrical

Applicable for W710, Z710

Contents 1

General...............................................................................................................2

2 Repair Actions for Manual Test Failures......................................................... 3

2.1 Power On / Off.......................................................................................3

2.2 Software Flash ...................................................................................... 3

2.3 Charging................................................................................................3

2.4 Hands-Free connection (PHF) .............................................................. 4

2.5 SIM........................................................................................................4

2.6 Display...................................................................................................4

2.7 Keypad Illumination (LEDs)...................................................................4

2.8 Main Keypad Keys ................................................................................4

2.9 Volume Up / Down Key.........................................................................4

2.10 PTT Key ................................................................................................ 4

2.11 Flip Keys................................................................................................4

2.12 Keypad Lock Key .................................................................................. 4

2.13 Vibrator..................................................................................................4

2.14 Earphone (Receiver, Flip Speaker).......................................................4

2.15 Polyphonic Speaker (Alert, Ringer, Base Speaker) ..............................4

2.16 Microphone............................................................................................4

2.17 Real Time Clock....................................................................................4

2.18 Camera..................................................................................................4

2.19 Flip Sensor............................................................................................4

2.20 IR...........................................................................................................4

2.21 Bluetooth...............................................................................................4

2.22 FM Radio...............................................................................................4

2.23 Accelerometer.......................................................................................4

2.24 Memory Card.........................................................................................4

3 Repair Actions for Go/No Go Test Failures....................................................4

4 Repair Actions for Calibration Routine Failures ............................................5

4.1 GSM 850, 900, 1800, or 1900...............................................................5

4.2 EDGE 850, 900, 1800, or 1900.............................................................5

5 Revision History................................................................................................6

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Page 2

Trouble Shooting Guide, Electrical

1 General

The purpose of this document is to indicate the electrical level repair actions associated with the different failure symptoms.

For symptoms that have multiple repair actions, the repair actions are listed in order of their probability of creating a successful repair. The first action has the highest probability, and subsequent actions have lower probabilities. The intention is for the repair technician to implement the first repair action and then retest the phone. If the phone continues to fail the same test, then the technician should continue to the second repair action. If the phone continues to fail the same test after all of the repair actions are exhausted, then the phone will be considered not reparable at this level.

This document should be used only after the actions from the Mechanical Trouble Shooting Guide have been exhausted for the specific symptom.

Voltage, current, and resistance information is provided for some symptoms to enable faster repairs. The phone should be fully assembled. Purchasing this equipment and performing these measurements is optional but recommended.

Perform current measurements using a dummy battery and power supply with digital current display. The phone should be fully assembled.

Perform voltage measurements with a multimeter.

Perform resistance measurements with a multimeter.

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Trouble Shooting Guide, Electrical

2 Repair Actions for Manual Test Failures

Failure Failure Symptom

2.1 Power On / Off

2.2 Software Flash

2.3 Charging

Current draw when powered off N1302

Current draw greater than 400 mAmps during power up sequence Hangs at gray display with constant vibration Some current draw when pressing power key, but current returns to 0 when power key is released

Measure resistance across L801: (Ohms) Resistance = 1.2 to 1.7 Ohms Powers On when battery is installed BUT will not power off

Powers On when power key is pressed BUT will not power off. Power key fails service menu keypad test.

Measure voltage across V501 (Vdc)

Pos1 to neg2 = 0.54 – 0.56 Pos1 to neg3 = 0.49 – 0.52 Pos2 to neg3 = 0.56 – 0.58

Power on sequence begins (quick vibration and display flash), then display darkens. Maintains a small current (less than 20 mAmps) Other symptoms Replace X800 if damaged EMMA does not respond. Display turns on and charging icon appears. Measure voltage across V601 (Vdc)

Pos1 to neg2 = 0.66 – 0.69 Pos1 to neg3 = 0.66 – 0.68

Measure voltage across V604 (Vdc)

Pos1 to neg2 = 1.03 – 1.06 Pos1 to neg6 = 0.51 – 0.53 Pos3 to neg4 = 0.45 – 0.48

Charging from power outlet Measure voltage across V803 (Vdc)

Pos1 to neg5 = 0.45 – 0.48 Pos4 to neg5 = 0.70 – 0.72 Measure voltage across V804 (Vdc) Pos1 to neg4 = 2.78 – 2.81 Pos1 to neg5 = 0.40 – 0.43

Repair Action

N1300 N705 N1300 N705

B300

If resistance is outside of range,

then replace L801

If voltage is outside of range, then

replace V501

N1206 N1203

D601

If voltage is outside of range, then

replace V601

If voltage is outside of range, then

replace V604

If voltage is outside of range, then

replace V803

If voltage is outside of range, then

replace V804

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Trouble Shooting Guide, Electrical

Failure

2.4 Hands-Free connection (PHF)

2.5 SIM

2.6 Display

2.7 Keypad Illumination (LEDs)

2.8 Main Keypad Keys

2.9 Volume Up / Down Key

2.10 PTT Key

2.11 Flip Keys

2.12 Keypad Lock Key

2.13 Vibrator

2.14 Earphone (Receiver, Flip Speaker)

2.15 Polyphonic Speaker (Alert, Ringer, Base Speaker)

2.16 Microphone

2.17 Real Time Clock

2.18 Camera

2.19 Flip Sensor

2.20 IR

2.21 Bluetooth

2.22 FM Radio

2.23 Accelerometer

2.24 Memory Card

Failure Symptom

Charging from computer via USB Measure voltage across V609 (Vdc)

Pos1 to neg3 = 0.21 – 0.23

Navigation LEDs - Individual V562-V569 Number Key LEDs - Individual V555-V561, V701 LED Group V555-V561 V526 LED Group V562-V569 V537

Repair Action

If voltage is outside of range, then

replace V609

D601 N703

Replace X701 if damaged Replace X424 if damaged

No Repair Action Replace X1221 if damaged Replace X1221 if damaged Replace X424 if damaged S527 Replace X424 if damaged Replace X424 if damaged Replace X1214, X1215 if

damaged N704, N705 Replace X702 if damaged B300 Replace X424 if damaged N810 N401 N400 D600 N1100 N807 No Repair Action N501 X201

3 Repair Actions for Go/No Go Test Failures

Failure Repair Action

Fails any part of Go/No Go testing

Fails Go/No Go test, but passes calibration

Fails Go/No Go test after passing calibration

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run the calibration routine replace the antenna check X1202 and X1204 for damage and replace if

necessary

rerun the phone through Go/No Go testing

change X1201 and retest

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Trouble Shooting Guide, Electrical

4 Repair Actions for Calibration Routine Failures

4.1 GSM 850, 900, 1800, or 1900

The variable F in the table below will be replaced by one of the different frequencies (GSM850, GSM900, etc.).

Routine Repair Action

F_Calibrate_RXVCO

N1203

F_Calibrate_TXVCO F_Calibrate_TXCHVCO

F_Check_Output_Power N1300

F_Calculate_POWTX_Value N1300

Calibrate_VCXO N1206

F_Measure_Multiframe N1300

F_RSSI_Calibration N1203

4.2 EDGE 850, 900, 1800, or 1900

The variable F in the table below will be replaced by one of the different frequencies (EDGE850, EDGE900, etc.).

The variable X in the table below will be replaced by one of the different levels (1, 2, or

3).

N1203 N1203

X1201 N1204

N1204

Routine Repair Action

F_Check_Output_Power N1300 F_Get_POWTX_Value_For_PLX N1300

F_Calibrate_VGAGAINX

F_Calibrate_PowerX

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N1300 N1203

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Trouble Shooting Guide, Electrical

5 Revision History

Rev. Date Changes / Comments

A 2006-Aug-29 Initial Release B 2006-Nov-27 Removed N811 and X903 from FM radio section. These parts are not

reparable. Attempting to remove the shield can causes solder ball shorts under the FM radio ASIC.

C 2007-Aug-15 Added N1100 to Bluetooth section.

Added N705 to Power section.

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