Sony Ericsson J110 User manual

Trouble Shooting Guide, Mechanical
4/000 21-1/FEA 209 544/128 A
Company Internal ©Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, Mechanical
Applicable for J110 and J120
Contents
1General ...............................................................................................................2
2Service functions in the software...........................................................2
3Misuse and other no warranty issues ....................................................3
4Appearance Problems.......................................................................................7
5Network/Signal Problems .................................................................................9
6On/Off Problems .............................................................................................. 11
7Audio Problems ............................................................................................... 13
Microphone........................................................................................................13
Receiver ............................................................................................................15
Loudspeaker......................................................................................................17
8Key Problems...................................................................................................18
9Display Problems ............................................................................................19
10 Illumination Problems .....................................................................................19
11 Alert Problems ................................................................................................. 20
Vibrator .............................................................................................................20
Loudspeaker......................................................................................................21
12 SIM Problems...................................................................................................22
13 Charging/Capacity Problems .........................................................................23
14 Hands-Free Problems .....................................................................................25
15 Software Problems ..........................................................................................26
16 Revision History ..............................................................................................27

Trouble Shooting Guide, Mechanical
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Company Internal ©Sony Ericsson Mobile Communications AB
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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.
2 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
Flash LED
Real time clock
FM radio (You need a headset to test) NOTE: For J120 only.
Total call time
NOTE: Different names may occur depending on language setting and customization.

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3 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.
3..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.

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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

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3..2 Liquid damage sticker
There is placed a sticker inside the phone that gives a hint to see if the phone is damage by liquid or not. This sticker is
located at 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 1.2.1).
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

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3..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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4 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 if necessary
•If unacceptable scratched or damaged
– Replace damage parts if necessary
NOTE: Misuse is not covered by
warranty. Refer to chapter 1.2

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Problem Area Items to Check Repair Action Reference Image
Visually inspect all keys •If dirty – clean parts if necessary
•If unacceptable scratched or damaged
– Replace damage parts if necessary
NOTE: Misuse is not covered by
warranty. Refer to chapter 1.2

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5 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 pads •If dirty or oxidized – Clean it

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Problem Area Items to Check Repair Action Reference Image
Visually inspect antenna •If dirty or oxidized – Clean it.
•If damaged – Replace frame case
assy.
Visually inspect antenna springs •If antenna springs incorrect height,
lower than the rib – Replace frame
case.
If the issue is still not resolved →•Handle the unit according to local
directives.

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6 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
Problems” chapter 7.
Before proceeding →Perform a flash upgrade
Visually inspect contact pads on
battery.
•If dirty or oxidized – Clean pads.
•If damage – Replace the battery.
Power On
problems
Visually inspect battery connector. •If dirty or oxidized – Clean it.
Note: Take care not to bend connector
pins.
•If damaged – Send to an electrical
repair location.

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Problem Area Items to Check Repair Action Reference Image
Visually inspect the power key. •If damaged – Replace the keypad.
Inspect the area between the keypad
and the dome sheet
•If the keypad is damaged – Replace it
•Replace the dome sheet
If the issue is still not resolved →•Send to a repair location allowed
perform electrical repairs on this
product

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7 Audio Problems
Problem Area Items to Check Repair Action Reference Image
Before proceeding →•Perform a flash upgrade and a setting
reset.
Visually inspect the microphone’s
external port
•If clogged – Remove the microphone,
clean the microphone port and replace
the microphone again.
Microphone
Visually inspect the microphone pads •If dirty or oxidized – Clean it.

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Problem Area Items to Check Repair Action Reference Image
Visually inspect the microphone springs •If dirty or oxidized – Clean.
•If damaged – Replace microphone.
If the issue is still not resolved →•Handle the unit according to local
directives

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Problem Area Items to Check Repair Action Reference Image
Before proceeding →•Perform a flash upgrade and a setting
reset.
Receiver
No sound or poor
quality sound
Visually inspect receiver’s external port
and dust cloth
•If clogged – Clean or replace Front
Cover Assy.
•If dust cloth damaged – Replace Front
Cover Assy
NOTE: If the dust cloth has been
damaged – clean the inside of the
phone carefully.

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Problem Area Items to Check Repair Action Reference Image
Visually receiver pads.
•If dirty or oxidized – Clean it.
Visually inspect receiver’s port on the
metal frame.
•If damaged – Replace the LCM metal
frame and the Receiver
•If clogged – Clean the LCM metal
frame port and replace the Receiver
If the issue is still not resolved →•Handle the unit according to local
directives.

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Problem Area Items to Check Repair Action Reference Image
Before proceeding •Perform a flash upgrade and a setting
reset.
Visually inspect speaker’s external port
and dust cloth.
•If dirty or damaged – Replace battery
cover assy.
Visually inspect the loudspeaker •If damage – Replace loudspeaker
Loudspeaker
No sound or poor
quality sound.
If the issue has not been resolved •Handle the unit according to local
directives.

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8 Key Problems
Problem Area Items to Check Repair Action Reference Image
Visually inspect the keypad. Inspect the
area between the keypad and the dome
foil assembly where the key is not
functioning
•If the keypad is damaged – replace it
•Replace the dome sheet
Keypad
One or several
keys on the keypad
are not functioning
or are intermittent.
If the issue is not resolved →•Handle the unit according to local
directives.

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9 Display Problems
Problem Area Items to Check Repair Action Reference Image
Before proceeding →•Perform a flash upgrade and a setting
reset.
Display will not
work
If the issue is not resolved →•Send to a repair location allowed
perform electrical repairs on this
product
10 Illumination Problems
Problem Area Items to Check Repair Action Reference Image
Before proceeding →•Perform a flash upgrade and a setting
reset.
Keypad
illumination: The
entire keypad will
not illuminate If the issue is not resolved →•Send to a repair location allowed
perform electrical repairs on this
product

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11 Alert Problems
Problem Area Items to Check Repair Action Reference Image
Before proceeding •Perform a flash upgrade and a setting
reset.
Visually inspect the vibrator pads on the
PCB.
•If dirty or oxidized – Clean them.
Vibrator
Visually inspect the vibrator •If dirty, oxidized or damaged – Replace
it.