Sony Ericsson Z320 User manual

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, Mechanical
Applicable for Z320
Contents
1General...............................................................................................................2
1.1 Service functions in the software...........................................................2
1.2 Misuse and other no warranty issues....................................................3
2Appearance Problems.......................................................................................6
3Network/Signal Problems .................................................................................7
4On/Off Problems................................................................................................9
5Audio Problems...............................................................................................11
6Key Problems...................................................................................................16
7Display Problems ............................................................................................19
8Illumination Problems.....................................................................................21
9Alert Problems.................................................................................................23
10 SIM Problems...................................................................................................24
11 Charging/Capacity Problems .........................................................................25
12 Camera Problems............................................................................................27
13 Data Communication Problems .....................................................................29
14 Hands-Free Problems .....................................................................................30
15 Software Problems..........................................................................................31
16 Revision History..............................................................................................32

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 2(32)
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
LED/illumination
Keyboard
Speaker
Earphone
Microphone
Vibrator
Camera
Flash LED
Real time clock
Total call time
NOTE: Different names may occur depending on language setting and customization.

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 3(32)
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. LCD cracked due to drop. Clear scratches Mark after drop Corrosion components on the PCB.

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 4(32)
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
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 5(32)
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 damaged by liquid or not. This sticker is located
Battery housing lower-right (Fig. 1.2.1) and it is possible to see it without disassemble the phone.
On the other 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).
If the white sticker has been in contact with liquid, it turn into a red or pink sticker. In this case you should check the phone for liquid
damage (see point 1.2.1).
NOTE! There must be clear marks after liquid on the PCB before rejecting the phone for repair.
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.
Location of sticker This sticker is ok This sticker is not ok
Fig. 1.2.1 Fig. 1.2.2 Fig. 1.2.3

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 6(32)
2 Appearance Problems
Problem Area Items to Check Repair Action Reference Image
Visually inspect the cosmetic quality of
all user viewable surfaces:
•Style-Up Cover, Battery Cover,
Front Lens, Camera Lens, Lower
•Visually inspect for improper gap
between seams
•Volume Key, IrDA window
Appearance
•Keypad, Main Lens, Co-brand,
Receiver Plate
•If dirty –Clean parts as necessary.
•If unacceptable scratched or damaged
–Replace damage parts as necessary.

Trouble Shooting Guide, Mechanical
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Company Internal ©Sony Ericsson Mobile Communications AB 7(32)
3 Network/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
– Send to an electrical repair location.
No Signal or Poor
Signal
Visually inspect Antenna Pogo pin •If dirty or oxidized
– Clean it
•Trial the spring for elasticity. If locked
– Send to an electrical repair location

Trouble Shooting Guide, Mechanical
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Company Internal ©Sony Ericsson Mobile Communications AB 8(32)
Problem Area Items to Check Repair Action Reference Image
Visually inspect antenna contact pad •If dirty or oxidized
– Clean it
•If damaged
– Replace Antenna Assy.
Visually inspect Hinge Spring
Connector •If dirty or clogged
– Clean it.
•If damaged
– Replace the Hinge Spring Connector
If the issue has not been resolved •Handle the unit according to local
directives.

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 9(32)
4 On/Off Problems
Problem Area Items to Check Repair Action Reference Image
Check whether the phone vibrates after
pressing the power key and whether
the keypad illuminates
•If activation of the vibrator or keypad
is detected
– Refer to the “Display problem” in
Chapter 7.
Before proceeding •Perform a flash upgrade
Visually inspect contact pads on battery
Note! Use new battery to check
•If dirty or oxidized
– Clean pads
•If damaged
– Replace the battery
Power on problems
Visually inspect Battery Connector •If dirty or oxidized
– Clean it.
•If damaged
– Send to an electrical repair location.

Trouble Shooting Guide, Mechanical
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Problem Area Items to Check Repair Action Reference Image
Visually inspect keypad outer •If power key damaged
– Replace keypad.
Visually inspect dome sheet •If dirty or oxidized
– Clean dome sheet.
•If damaged
– Replace the dome sheet.
If this issue has not been resolved •Send to an electrical repair location.

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 11(32)
5 Audio Problems
Problem Area Items to Check Repair Action Reference Image
Before proceeding •Perform a flash upgrade and a setting
reset
Visually inspect the loudspeaker
external port •If dirty or clogged –Clean it.
Loudspeaker
No sound or poor
quality sound
Visually inspect the speaker mesh •If dirty or clogged –Clean it.
•If damaged
– Replace the Upper Frame Assy and
clean all parts from dust.

Trouble Shooting Guide, Mechanical
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Company Internal ©Sony Ericsson Mobile Communications AB 12(32)
Problem Area Items to Check Repair Action Reference Image
Visually inspect the loudspeaker
springs, speaker body, main FPC pads,
upper frame structure
•If spring on the Speaker or the pads on
the Flex Assy are dirty or oxidized
– Clean parts.
•If speaker body is damaged
– Replace the Speaker.
•If spring is damaged
– Replace the Speaker.
•If Upper frame is damaged
– Replace upper frame.
•If main FPC damaged
– Replace Flex Assy.
If this issue has not been resolved •Send to an electrical repair location.

Trouble Shooting Guide, Mechanical
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Company Internal ©Sony Ericsson Mobile Communications AB 13(32)
Problem Area Items to Check Repair Action Reference Image
Before proceeding •Perform a flash upgrade and a setting
reset.
Visually inspect receiver’s external port •If clogged
– Clean or replace Receiver Plate or
Upper Inner Cover.
Visually inspect receiver’s inner pads •If dirty or oxidized
– Clean the pads.
•If damaged
– Replace Flex Assy
Receiver:
No sound or poor
quality sound`
•Visually inspect the Receiver
•Perform a test with a new Receiver
for verification
•If dirty or oxidized
– Clean the springs.
•If ‘old’ Receiver is not working
– Replace Receiver

Trouble Shooting Guide, Mechanical
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Company Internal ©Sony Ericsson Mobile Communications AB 14(32)
Problem Area Items to Check Repair Action Reference Image
Perform a test with a new Flex Assy for
verification •If ‘old’ Flex Assy is not working –
Replace the FPC
If this issue has not been resolved •Send to an electrical repair location.
Before proceeding •Perform a flash upgrade and a setting
reset
Microphone
Visually inspect the microphone’s
external port •If clogged
– Clean or replace Lower Inner Cover.

Trouble Shooting Guide, Mechanical
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Company Internal ©Sony Ericsson Mobile Communications AB 15(32)
Problem Area Items to Check Repair Action Reference Image
Visually inspect the microphone’s
sponge •If damaged
– Replace the sponge.
If the issue has not been resolved •Send to an electrical repair location.

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 16(32)
6 Key Problems
Problem Area Items to Check Repair Action Reference Image
Visually inspect for debris between
keypad and dome sheet and for
damage to the keypad and the dome
sheet
•If dirty or clogged
– Clean both parts.
•If damaged
– Replace the keypad and/or dome
sheet as necessary.
Visually inspect the Operator key •If damaged
– Replace the Operator Key
Keypad:
A key on the
keyboard is not
functioning or is
intermittent
If the issue has not been resolved Send to an electrical repair location

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 17(32)
Problem Area Items to Check Repair Action Reference Image
Visually inspect the Volume Key •If dirty or clogged
– Clean it.
•If damaged
– Replace the Volume Key.
Volume Key
If the issue has not been resolved •Send to an electrical repair location
•If any problem: Try and replace
components in corresponding order to
trouble shoot the problem:
1. Replace the hinge
Flip problem Inspect if the phone open and close
properly
2. Replace Rotation Lock

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 18(32)
Problem Area Items to Check Repair Action Reference Image
3. Replace Upper Inner Cover
4. Replace Dummy Hinge
If the issue has not been resolved •Handle the unit according to local
directives.

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 19(32)
7 Display Problems
Problem Area Items to Check Repair Action Reference Image
Check whether the phone vibrators 10
to 15 seconds after pressing the power
key and whether the keypad illuminates
•If activation of the vibrator are not
detected
– Refer to the On/Off problems in
Chapter 4
Before proceeding •Perform a flash upgrade and a setting
reset.
Visually inspect the LCD connector •If improperly connected
– Re-insert the LCD FPC into the
connector
LCD module
Visually inspect the ZIF Connector. •If improperly connected
– Re-insert the Flex Assy into the ZIF
connector

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/121 A
Company Internal ©Sony Ericsson Mobile Communications AB 20(32)
Problem Area Items to Check Repair Action Reference Image
Check the FPC and LCM module •If damaged
– Replace the main FPC or LCM
If the issue has not been resolved •Send to an electrical repair location.