Sony Ericsson K770 Manuale utente

Trouble Shooting Guide, Mechanical

4/000 21-1/FEA 209 544/142 A

Company Internal

Sony Ericsson Mobile Communications AB

1(32)

Trouble Shooting Guide, Mechanical

Applicable for K770

Contents

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

1.1

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

1.2

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

Appearance Problems.......................................................................................7

Network/Signal Problems .................................................................................9

On/Off Problems ..............................................................................................12

Audio Problems ...............................................................................................14

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

Display Problems ............................................................................................21

Illumination Problems .....................................................................................22

Alert Problems .................................................................................................24

SIM Problems...................................................................................................26

Charging/Capacity Problems .........................................................................27

Camera Problems ............................................................................................29

Media Memory Problems ................................................................................30

Software Problems ..........................................................................................31

Revision History ..............................................................................................32

Trouble Shooting Guide, Mechanical

4/000 21-1/FEA 209 544/142 A

Company Internal

Sony Ericsson Mobile Communications AB

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1General

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.

1.1Service functions in the software

The service menu will be accessed with the following key combination.

⇒*⇐⇐*⇐*

They are as follows:

Service info

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

Real time clock

Total call time

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

Trouble Shooting Guide, Mechanical

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Company Internal

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1.2Misuse 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.

LCD cracked due to

drop.

Clear scratches Mark after drop Corrosion components

on the PCB.

Trouble Shooting Guide, Mechanical

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Corrosion components on

the PCB.

Corrosion components on the

PCB.

SIM reader damaged by

liquid.

System connector damaged by

liquid

Components around system

connector damaged by liquid

System connector pad(s)

damaged by liquid

Trouble Shooting Guide, Mechanical

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Company Internal

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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 Antenna box (Fig. 1.2.1) and it is possible to see it without disassemble the phone.

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

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.

Fig. 1.2.2 Fig. 1.2.3

Trouble Shooting Guide, Mechanical

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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.

Trouble Shooting Guide, Mechanical

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Company Internal

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2Appearance Problems

Problem Area Items to Check Repair Action Reference Image

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.

Appearance

Visually inspect all keys •If dirty – Clean parts as necessary.

•If unacceptably scratched or damaged

– Replace damaged parts as

necessary.

Trouble Shooting Guide, Mechanical

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Problem Area Items to Check Repair Action Reference Image

Visually inspect for improper gap

between seams

•Reassemble or replace damaged parts

as necessary.

Trouble Shooting Guide, Mechanical

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3Network/Signal Problems

Problem Area Items to Check Repair Action Reference Image

Before proceeding !Perform a flash upgrade.

Visually inspect SIM holder •If dirty or oxidized – Clean it.

•If damaged – Replace the M2 SIM

assembly.

No Signal or Poor

Signal

Visually inspect antenna contact pads •If dirty or oxidized – Clean the pads

and replace the Antenna box.

Trouble Shooting Guide, Mechanical

4/000 21-1/FEA 209 544/142 A

Company Internal

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Problem Area Items to Check Repair Action Reference Image

Visually inspect antenna •If dirty or oxidized – Clean the pads.

•If damaged – Replace the Antenna

box.

•If antenna pin damaged - Send to an

electrical repair location.

If the issue has not been resolved !•Handle the unit according to local

directives.

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