Sony-Ericsson W950 Service Manual Trouble Shooting

Trouble Shooting Guide, Mechanical

Applicable for W950i and W950c

Contents

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

1

1.1 Service functions in the software...........................................................2

1.2 Misuse and other no warranty issues ....................................................3

2 Appearance Problems....................................................................................... 6

3 Network/Signal Problems .................................................................................8

4 On/Off Problems ..............................................................................................10

5 Audio Problems ...............................................................................................12

6 Key Problems................................................................................................... 15

7 Display Problems ............................................................................................18

8 Illumination Problems .....................................................................................20

9 Alert Problems .................................................................................................22

10 SIM Problems...................................................................................................24

11 Charging/Capacity Problems .........................................................................25

12 Data Communication Problems .....................................................................27

13 Media Memory Problems ................................................................................28

14 Software Problems ..........................................................................................29

15 Revision History ..............................................................................................30

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Trouble Shooting Guide, Mechanical

1 General

This document outlines the mechanical repairs that should be made in an attempt to fix the common failures that are seen in the field. To gain a complete understanding of how to test and repair a specific failure, this document should be used in conjunction with the Test Instructions, Mechanical and the Working Instructions, Mechanical.

1.1 Service functions in the software

The service menu will be accessed with the following key combination. Use the jog dial and keyboard.

▲*▼▼*▼*

They are as follows:

Service information

Service tests

Format internal disk

The phones software has a built in service functionality that allows you to test some of the phones functions. (See point 2 above) It looks like this:

Display Touch screen Illumination LED’s Keyboard Vibrator Speaker’s Microphone Memory stick

NOTE: Different names may occur depending on language setting and customization.

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1.2 Misuse and other no warranty issues

Misuse is not covered by warranty. This chapter will explain what’s not covered by warranty. Phones that have been exposed to misuse will not be covered by warranty.

This means: if it is possible to repair the phone, the customer will have to pay for the repair. SEMC will not allow any of these phones to be claimed into WCMS. Some local perspectives may interfere with this. Please reference to local directives.

1.2.1 Action

Make a general visual inspection for misuse.

Below are some examples of what is not covered by warranty.

Front window broken

due to misuse.

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LCD cracked due to

drop.

Clear scratches Mark after drop Corrosion components

on the PCB.

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Corrosion components on

Corrosion components on the

the PCB.

Components around system

connector damaged by liquid

1.2.2 Liquid damage sticker

In the phone there is placed a sticker that can give you a hint to see if the phone is damage by liquid or not. This sticker is located near the SIM reader (Fig. 1.2.1) and it is possible to see it without disassemble the phone.

PCB.

SIM reader damaged by

liquid.

System connector pad(s)

damaged by liquid

System connector damaged by

liquid

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Fig. 1.2.1

On the pictures below you will see the different between a sticker that has been in contact with liquid (Fig. 1.2.3) and with one that hasn’t (Fig. 1.2.2).

This sticker is ok This sticker is not ok

1.2.3 Action

Make a general visual inspection for misuse, corrosion or oxidation from liquid damage. No further action should be taken for a liquid damaged phone. Handle the unit according to local directives.

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Fig. 1.2.2 Fig. 1.2.3

The white sticker that has been in contact with liquid turns into a red or pink sticker. In this case you should check the phone for liquid damage

(See point 1.1.1)

.

Note: There must be clear marks after liquid on the PCB before rejecting the phone for repair.

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2 Appearance Problems

Problem Area Items to Check Repair Action Reference Image

Appearance

Visually inspect the cosmetic quality of all user viewable surfaces

• If dirty – Clean parts as necessary.

• If unacceptably scratched or damaged

– Replace damage parts as necessary.

NOTE: Misuse is not covered by warranty. Refer to chapter 1.2

Visually inspect all keys

Visually inspect for improper gap between seams

• If dirty – Clean parts as necessary.

• If unacceptably scratched or damaged

– Replace damaged parts as necessary.

NOTE: Misuse is not covered by warranty. Refer to chapter 1.2

• Reassemble or replace damaged parts as necessary.

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Problem Area Items to Check Repair Action Reference Image

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3 Network/Signal Problems

Problem Area Items to Check Repair Action Reference Image

No Signal or Poor Signal

Before proceeding ! Perform a flash upgrade.

Visually inspect SIM holder

Visually inspect antenna contact pads

• If dirty, oxidized or damaged – Replace the SIM PWB ASM.

• If dirty or oxidized – Send to electrical repair center

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Visually inspect antenna

• If dirty, damaged or oxidized – Replace Antenna ASM.

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Problem Area Items to Check Repair Action Reference Image

If the issue has not been resolved !

• Handle the unit according to local directives.

No signal when using external antenna (ex. Hands free in car).

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Connect the phone to a handsfree car kit connected with external antenna.

Visually inspect the antenna bar on the phone.

If the issue has not been resolved !

• If no or only very less signal – Push the middle pin of the ext. antenna connector a few times.

Note: Be gently it might damage the

connector.

• Handle the unit according to local directives.

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4 On/Off Problems

Problem Area Items to Check Repair Action Reference Image

Power On problems

Check whether the phone vibrates 10 to 15 seconds after pressing the power key and whether the keypad illuminates

• If activation of the vibrator or keypad are detected, refer to the “Display Problems” chapter 7

Before proceeding !

Visually inspect contact pads on battery

Visually inspect battery connector

• Perform a flash upgrade.

• If dirty or oxidized – Clean pads.

Note: Be gentle do not bend or damage the gold surface on connector pad’s

• If damaged – Replace the battery.

• If dirty or oxidized – Clean it.

Note: Be gentle do not bend or damage the gold surface on connector pin’s

• If damaged – Send to an electrical repair location.

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Problem Area Items to Check Repair Action Reference Image

Visually inspect the power key

If the issue has not been resolved !

• If damaged – Replace it.

• Handle the unit according to local

directives.

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5 Audio Problems

Problem Area Items to Check Repair Action Reference Image

Microphone:

Before proceeding !

• Perform a flash upgrade and a setting reset.

Visually inspect the microphone’s external port

Visually inspect the microphone cushion

If the issue has not been resolved !

• If clogged - Clean or replace frame ASM.

• If improperly mounted - Secure properly connection

• If damaged – Replace it

• Handle the unit according to local

directives.

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Ear speaker:

No or poor sound quality

Before proceeding !

Visually inspect ear speaker’s external port

• Perform a flash upgrade and a setting reset.

• If clogged – Clean or replace Front sub ASM.

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If the issue has not been resolved !

• Replace ear speaker.

Note: When replacing speaker remember to add a new cushion.

• Handle the unit according to local directives.

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Loud speaker:

No or poor sound quality

Before proceeding !

Visually inspect the loud speaker’s dust cloth

If the issue has not been resolved !

• Perform a flash upgrade and a setting reset.

• If dirty or damaged – Replace the net, loud speaker

• Replace antenna ASM.

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If the issue has not been resolved !

• Handle the unit according to local directives.

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6 Key Problems

Problem Area

Keyboard:

A key on the keyboard is not functioning or is intermittent

Items to Check

Visually inspect if the BtB connector is properly connected.

Visually inspect for debris between keypad and flex film ASM and for damage to the keypad or flex film ASM.

If the issue has not been resolved !

Repair Action

• If improperly connected – Re-establish proper connection.

• If damaged – Send to electrical repair.

• If dirty – Clean both parts.

• If damaged - Replace keypad and/or

flex film ASM as necessary.

• Replace flex film ASM, if it has not already been replaced.

Reference Image

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If the issue has not been resolved !

• Handle the unit according to local directives.

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Problem Area

Touch screen

Items to Check

Visually inspect if the BtB connector is properly connected

Repair Action

• If improperly connected – Re-establish proper connection.

• If damaged – Send to electrical repair.

Reference Image

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Visually inspect for damage to the touch screen

If the issue has not been resolved !

• If damaged – Replace touch screen panel + frame.

Note: When replacing display take care not to damage the two LCD gaskets.

• Handle the unit according to local directives.

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Problem Area

Side keys

Items to Check

Visually inspect for damage to the back

Repair Action

• If damaged - Replace it.

key

If the issue has not been resolved !

• Handle the unit according to local directives.

Reference Image

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7 Display Problems

Problem Area

LCD problem

Items to Check

Check whether the phone vibrates 10 to 15 seconds after pressing the power key and whether the keypad illuminates

Before proceeding !

Visually inspect if the BtB connector is properly connected

Repair Action

• If activation of the vibrator are not detected, refer to the On/Off

Problems” chapter 4

• Perform a flash upgrade and a setting reset.

• If improperly connected – Re-establish proper connection.

• If damaged – Send to electrical repair.

Reference Image

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Problem Area

Items to Check

If the issue has not been resolved !

Repair Action

• Replace the LCD.

Note: When replacing display take care not to damage the two LCD gaskets.

Reference Image

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8 Illumination Problems

Problem Area

Keys:

The entire keypad or a portion of the keypad does not illuminate.

Items to Check

Before proceeding !

Visually inspect if the BtB connector is properly connected

Visually inspect the dome sheet.

If the issue has not been resolved !

Repair Action

• Perform a flash upgrade and a setting reset.

• If improperly connected – Re-establish proper connection.

• If damaged – Send to electrical repair.

• If damaged – Replace it

• Replace the dome sheet.

Reference Image

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If the issue has not been resolved !

• Handle the unit according to local directives.

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LCD

Before proceeding !

• Perform a flash upgrade and a setting reset.

Visually inspect if the BtB connector is properly connected

If issue has not been resolved !

• If improperly connected – Re-establish proper connection.

• If damaged – Send to electrical repair.

• Replace the LCD.

Note: When replacing display take care not to damage the two LCD gaskets.

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If the issue has not been resolved !

• Handle the unit according to local directives.

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9 Alert Problems

Problem Area

Vibrator:

Items to Check

Before proceeding !

Visually inspect the vibrator pads on the PCB

Visually inspect the vibrator

Repair Action

• Perform a flash upgrade and a setting reset.

• If dirty or oxidized – Clean them.

• If dirty or oxidized – Replace it.

• If damaged – Replace it.

Reference Image

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Loud speaker:

No or poor sound quality

Before proceeding !

Visually inspect the loud speaker’s dust cloth

If the issue has not been resolved !

• Perform a flash upgrade and a setting reset.

• If dirty or damaged – Replace the net, loud speaker

• Replace antenna ASM.

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If the issue has not been resolved !

• Handle the unit according to local directives.

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10 SIM Problems

Problem Area

SIM undetected (Insert SIM)

Unit indicates an incorrect SIM is inserted (Insert correct SIM)

Items to Check

Inspect SIM holder

If the issue has not been resolved !

Check whether the phone is locked to a particular carrier and whether the correct carrier’s SIM is being used

If the issue has not been resolved !

Repair Action

• If dirty, oxidized or damaged – Replace (SIM) MEM PCB ASM.

• Handle the unit according to local directives.

• Use Correct Carrier SIM or test SIM.

• Handle the unit according to local

directives.

Reference Image

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11 Charging/Capacity Problems

Problem Area

Battery will not charge

Items to Check

Visually inspect the contact pads of the battery

Visually inspect the system connector

Visually inspect the battery connector

Repair Action

• If dirty or oxidized – Clean.

• If damaged – Replace battery.

Note: Be gentle do not bend or damage the gold surface on connector pad’s

• If dirty, oxidized or damaged – Clean.

NOTE: Misuse is not covered by warranty. Refer to chapter 1.2

• If dirty or oxidized – Clean it.

Note: Be gentle do not bend or damage the gold surface on connector pin’s

Reference Image

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• If damaged – Send to an electrical

repair location.

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Battery looses charge quickly/ standby time seems short

Before proceeding !

NOTE: Some features noticeably reduce the amount of standby time if they are turned on. Some examples

• Perform a flash upgrade and a setting reset.

are the back light (when on all the time and), Bluetooth and infrared.

If the issue has not been resolved !

• Replace battery.

• Handle the unit according to local

directives.

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12 Data Communication Problems

Problem Area Items to Check Repair Action Reference Image

Will not connect with a functional bluetooth device

Before proceeding ! Perform a flash upgrade.

Visually inspect bluetooth antenna

If the issue has not been resolved !

• If damaged – Replace frame ASM.

• Handle the unit according to local

directives.

Will not connect with a functional IR device

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Before proceeding !

Visually inspect the IRDA window for dirt, scratches, and damage

If the issue has not been resolved !

• Perform a flash upgrade and a setting reset.

• If dirty – Clean it.

• If damaged – Replace the frame ASM.

• Handle the unit according to local

directives.

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13 Media Memory Problems

Problem Area

Media Memory unavailable

Items to Check

Visual inspect Mem PCB Asm and that connector is correctly mounted to main PCB

If the issue has not been resolved !

Repair Action

• If damaged – Replace (SIM) MEM PCB ASM.

• Handle the unit according to local directives.

Reference Image

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14 Software Problems

• If there are problems with the response of the keypad commands, or spelling errors in the menu, if they are not related to mechanical damage, make a master reset and flash the phone with the latest software from EMMA II or III.

• Checking the software revision can be done in the Service info, see chapter Service functions in the software. Choose: Service info / SW information. The Software revision and date will be shown in the display.

Note: Do a SW upgrade before sending the unit to a higher level. Do not

If the failure still occurs, handle the unit according to the local directives.

scrap a phone that hasn’t been upgraded.

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15 Revision History

Rev. Date Changes / Comments

A 2006-09-19

Initial release

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Sony-Ericsson W950 Service Manual Trouble Shooting

Specifications and Main Features

Frequently Asked Questions

User Manual