Sony-Ericsson W850 Service Manual Trouble Shooting

Trouble Shooting Guide, Mechanical

Applicable for W850

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 ..............................................................................................11

5 Audio Problems ...............................................................................................13

6 Key Problems................................................................................................... 18

7 Slider Problems ...............................................................................................24

8 Display Problems ............................................................................................25

9 Illumination Problems .....................................................................................29

10 Alert Problems ................................................................................................. 30

11 SIM Problems...................................................................................................31

12 Charging/Capacity Problems .........................................................................32

13 Camera Problems ............................................................................................ 34

14 Data Communication Problems .....................................................................40

15 Software Problems ..........................................................................................41

16 Revision History ..............................................................................................42

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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 navigation keys ⇒*⇐⇐*⇐*

They are as follows:

Service info Service settings Service tests Text labels

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:

Main display LED/illumination Keyboard Speaker Earphone Microphone Vibrator Camera Flash LED Video call camera Memory Stick FM Radio Real time clock Total call time

NOTE: Different names will 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

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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ok

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

Before proceeding !

• Do software update content refresh.

Note: this problem will not be solved be a regular software update.

Note: Software Update Content Refresh will erase all user data.

No Signal or Poor Signal

Visually inspect SIM holder

Visually inspect antenna contact pads and the antenna connector.

• If dirty or oxidized – Clean it

• If damaged – Send to electrical repair.

• If dirty or oxidized – Clean the pads

and replace the antenna assembly.

Note: Do not bend the antenna connector.

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Trouble Shooting Guide, Mechanical

Problem Area Items to Check Repair Action Reference Image

Visually inspect antenna

• If dirty, oxidized or damaged – Replace it.

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If the issue has not been resolved !

• Handle the unit according to local directives.

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Trouble Shooting Guide, Mechanical

Problem Area Items to Check Repair Action Reference Image

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

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: Take care not to scratch the gold surface.

• 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 !

Cannot be power on, Cannot be detected on USB cable on EMMA III.

Visually inspect contact pads on battery

• Do software update content refresh.

Note: this problem will not be solved be a regular software update.

Note: Software Update Content Refresh will erase all user data.

1. Log on to EMMA as usual.

2. Use SEPI A1 with power charger attached.

3. Press keys 2 and 5 when you connect the phone.

• If dirty or oxidized – Clean pads.

• If damaged – Replace the battery.

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Problem Area Items to Check Repair Action Reference Image

Visually inspect battery connector

Visually inspect the power key

• If dirty or oxidized – Clean it.

Note: Take care not to bend the connector pin’s

• If damaged – Send to an electrical repair location.

• If damaged – Replace on/off key.

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If the issue has not been resolved !

• 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 !

• Do software update content refresh.

Note: this problem will not be solved be a regular software update.

Note: Software Update Content Refresh will erase all user data.

Visually inspect the microphone’s external port

If the issue has not been resolved !

• If clogged – Clean.

Note: It can easily happen that the customer blocks the microphone port with there hand. If no fault found. Please inform the customer where the port is and that it is important not to cover it during calls

• Replace microphone and microphone grommet.

• Handle the unit according to local directives.

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