Sony Ericsson Z550 Trouble shooting guide

Trouble Shooting Guide, Mechanical

Applicable for Z550i, Z550c, Z550a, Z558i & Z558c

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 .................................................................................7

4 On/Off Problems ................................................................................................9

5 Audio Problems ...............................................................................................11

6 Key/Flip Problems ...........................................................................................14

7 Display Problems ............................................................................................16

8 Illumination Problems .....................................................................................17

9 Alert Problems .................................................................................................18

10 SIM Problems...................................................................................................19

11 Charging/Capacity Problems .........................................................................20

12 Camera Problems ............................................................................................ 22

13 Data Communication Problems .....................................................................23

14 Noise from Hinge Area....................................................................................24

15 Software Problems ..........................................................................................25

16 Revision History ..............................................................................................26

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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 joystick.

⇒*⇐⇐*⇐*

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 External display LED/illumination Keyboard Speaker Earphone Microphone Vibrator Camera Memory stick FM radio Real time clock Total call time

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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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 contacts

• If dirty or oxidized – Clean it.

• If damaged – Send to an electrical

repair location.

• If dirty or oxidized – Clean it.

• If damaged send to electrical repair

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Visually inspect antenna

• If dirty, oxidized or damaged – Replace it

• Note; if the side snap hooks are damaged on Speaker Box it can be re-used as it does not affect performance when phone is reassembled.

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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.

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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

Visually inspect the power key

• Perform a flash upgrade.

• If dirty or oxidized – Clean pads.

• 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.

• If damaged – Replace keypad.

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Problem Area Items to Check Repair Action Reference Image

Visually inspect the dome array

• If dirty, oxidized or damaged – Dome array.

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 !

• Perform a flash upgrade and a setting reset.

Receiver:

No sound or poor quality sound

Visually inspect the microphone’s external port

If the issue has not been resolved !

Before proceeding !

Visually inspect receiver’s external port

Visually inspect receiver’s dust cloth

• If clogged - Clean or replace Lower Inner Cover Assembly.

• Handle the unit according to local directives.

• Perform a flash upgrade and a setting reset.

• If clogged – Clean or replace Front cover.

• If dirty or damaged – Replace front cover.

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Problem Area Items to Check Repair Action Reference Image

If the issue has not been resolved !

• Replace receiver.

• Handle the unit according to local

directives.

Speaker:

No sound or poor quality sound

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Before proceeding !

Visually inspect speaker’s external port

Visually inspect the speaker’s dust cloth

• Perform a flash upgrade and a setting reset.

• If clogged – Clean it.

• If dirty or damaged – Replace speaker

box.

• Note; if the snap hooks are damaged on Speaker Box it can be re-used as it does not affect performance when phone is reassembled.

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Problem Area Items to Check Repair Action Reference Image

If the issue has not been resolved !

• Replace speaker box.

• Note; if the side snap hooks are

damaged on Speaker Box it can be re-used as it does not affect performance when phone is reassembled.

If the issue has not been resolved !

• Handle the unit according to local directives.

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6 Key/Flip Problems

Problem Area

Keyboard:

A key on the keyboard is not functioning or is intermittent

Side keys

Items to Check

Visually inspect for debris between keypad and dome array and for damage to the keypad and the dome array.

If the issue has not been resolved !

Visually inspect for damage to the side keys

Repair Action

• If dirty – Clean both parts.

• If damaged – Replace keypad and/or

dome array as necessary.

• Replace the dome array, if it has not already been replaced.

• Handle the unit according to local directives.

• If damaged – Replace them

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

Items to Check

Flip problems Inspect when ever the phone open and

Repair Action

• If any problem – Replace the hinge

close properly

Reference Image

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7 Display Problems

Problem Area

LCD module

Sub and main LCD and Touch screen for Z558

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 whether the main FPC is properly connected to its connector on the display

If the issue has not been resolved !

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.

• Replace the LCD or Touch Screen on Z558

Reference Image

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8 Illumination Problems

Problem Area

LCD module

Sub and main LCD

Items to Check

Before proceeding !

Visually inspect whether the main FPC is properly connected to its connector on the display

If issue has not been resolved !

If the issue has not been resolved !

Repair Action

• Perform a flash upgrade and a setting reset.

• If improperly connected – Re-establish proper connection.

• Replace the LCD.

• Handle the unit according to local

directives.

Reference Image

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9 Alert Problems

Problem Area

Vibrator:

Speaker: Refer to “Speaker” section under “Audio Problems”

Items to Check

Before proceeding !

Visually inspect the vibrator pads on the main FPC

Visually inspect the vibrator

Repair Action

• Perform a flash upgrade and a setting reset.

• If dirty, oxidized or damaged – Replace main FPC.

• If dirty, oxidized or damaged – Replace it.

Reference Image

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Trouble Shooting Guide, Mechanical

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 or oxidized – Clean.

• If damaged – Send to an electrical

repair location.

• 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.

• If dirty, oxidized or damaged – Clean

or replace.

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

• If dirty or oxidized – Clean.

• If damaged – Send to an electrical

repair location.

Reference Image

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Trouble Shooting Guide, Mechanical

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 Camera Problems

Problem Area Items to Check Repair Action Reference Image

Camera

Visually inspect the camera lens

• If scratched or damaged – Replace the camera

Visually inspect whether the camera is properly connected to its socket on the main FPC.

If the issue has not been resolved !

• If improperly connected – Re-establish proper connection.

• Replace the camera and main FPC.

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13 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 dirty or damaged – replace .

• Note; if the snap hooks are

damaged on Speaker Box it can be re-used as it does not affect performance when phone is reassembled.

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If the issue has not been resolved !

• Handle the unit according to local directives.

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14 Noise from Hinge Area

Problem Area Items to Check Repair Action Reference Image

Squeaking or noise from hinge area

Visually inspect Hinge Area

• If dirty or damaged – replace.

• Replace Lower Inner Cover Assembly

Only with latest revision

• Note; if the snap hooks are damaged on Speaker Box it can be re-used as it does not affect performance when phone is reassembled.

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If the issue has not been resolved !

• Handle the unit according to local directives.

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15 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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16 Revision History

Rev. Date Changes / Comments

A 2006-07-03 First release

B 2006-09-28 Z550a Released

C 2006-10-12 Z558 Released

D 2006-10-17 Hinge Noise Added

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