Sony Ericsson J100a User manual

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/114 A
Company Internal
© Sony Ericsson Mobile Communications AB Approved according to 1/109 41-4/FCP 119 00 30
Trouble Shooting Guide, Mechanical
Applicable for J100a, J100c and J100i
Contents
1
General...............................................................................................................2
1.1 Service functions in the software...........................................................2
1.2 Misuse and other no warranty issues....................................................3
2 Appearance Problems.......................................................................................7
3 Network/Signal Problems .................................................................................8
4 On/Off Problems................................................................................................9
5 Audio Problems...............................................................................................10
6 Key Problems...................................................................................................13
7 Alert Problems.................................................................................................14
8 SIM Problems...................................................................................................15
9 Charging/Capacity Problems .........................................................................16
10 Revision History..............................................................................................17

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/114 A
Company Internal
© Sony Ericsson Mobile Communications AB 2(17)
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
There are two different service menus.
#82#; Here you will find information about software and hardware versions.
#890#; Here you will find the test menu.
The test menu will looks like this:
Keypad
Vibrator
LCM ; Display test
Buzzer ; Ring signal test
Voice loop back ; Microphone and speaker test
NOTE: Different names may occur depending on language setting and customization.

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/114 A
Company Internal
© Sony Ericsson Mobile Communications AB 3(17)
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 209 544/114 A
Company Internal
© Sony Ericsson Mobile Communications AB 4(17)
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 209 544/114 A
Company Internal
© Sony Ericsson Mobile Communications AB 5(17)
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.
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
4/000 21-1/FEA 209 544/114 A
Company Internal
© Sony Ericsson Mobile Communications AB 6(17)
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
4/000 21-1/FEA 209 544/114 A
Company Internal
© Sony Ericsson Mobile Communications AB 7(17)
2 Appearance 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.
NOTE: Misuse is not covered by
warranty. Refer to chapter 1.2
Visually inspect keypad •If dirty – Clean keypad.
•If unacceptably scratched or damaged
– Replace keypad.
NOTE: Misuse is not covered by
warranty. Refer to chapter 1.2
Appearance
Visually inspect for improper gap
between seams •Reassemble or replace damaged parts
as necessary.

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/114 A
Company Internal
© Sony Ericsson Mobile Communications AB 8(17)
3 Network/Signal Problems
Problem Area Items to Check Repair Action Reference Image
Visually inspect antenna contact pads •If dirty or oxidized – Clean the pads
and replace the antenna assembly.
Visually inspect antenna •If dirty or oxidized – Replace it.
•If damaged – Replace it.
No Signal or Poor
signal.
If the issue has not been resolved !•Handle the unit according to local
directives.

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/114 A
Company Internal
© Sony Ericsson Mobile Communications AB 9(17)
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
Visually inspect contact pads on battery •If dirty or oxidized – Clean pads.
•If damaged – Replace the battery.
Visually inspect the power key •If damaged – Replace the Dome Foil.
If the issue has not been resolved !•Handle the unit according to local
directives.

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/114 A
Company Internal
© Sony Ericsson Mobile Communications AB 10(17)
5 Audio Problems
Problem Area Items to Check Repair Action Reference Image
Visually inspect the microphone’s
external port •If clogged - Clean or replace Rear
cover.
If the issue has not been resolved !•Replace microphone
Microphone:
If the issue has not been resolved !•Handle the unit according to local
directives.