Sony Ericsson T66 User manual

Repair Instruction, Electrical
4/00021-2/FEA 209 544/52 A
Sony Ericsson Mobile Communications AB
Approved according to 00021 –LXE 107 42/1
Trouble Shooting GuideT66, Electrical
Contents
1Explanations ....................................................................................................................2
1.1 Service Test menu .............................................................................................2
2Network Problems ..........................................................................................................3
3On/Off problems .............................................................................................................4
4Display/Illumination Problems ......................................................................................5
5Capacity/Charging Problems.........................................................................................6
6Key Problems ..................................................................................................................7
6.1 Volume Switch does not work...........................................................................7
7Alert Problems ................................................................................................................8
7.1 Buzzer................................................................................................................8
7.2 Vibrator..............................................................................................................8
8Software Problems........................................................................................................10
9SIM Problems................................................................................................................10
10 Revision History............................................................................................................11

Repair Instruction, Electrical
4/00021-2/FEA 209 544/52 A
Sony Ericsson Mobile Communications AB
2(11)
1 Explanations
Component placing document is not available.
1.1 Service Test menu
In the software of the phone there is a built in service function that allows testing some of the
functions of the phone.
They are as follows:
1. Service info
2. Service settings
3. Service tests
To use the function press the following combination, using the navigation button and the
keyboard:
>*<<*<*

Repair Instruction, Electrical
4/00021-2/FEA 209 544/52 A
Sony Ericsson Mobile Communications AB
3(11)
2 Network Problems
• Check that the Antenna connector internal is properly fitting and undamaged (Fig.1.).
• If necessary replace the Antenna connector internal.
• Check that radiator inside Antenna is not mechanical damaged, bended or oxidised. If
needed, replaced the antenna assy (Fig. 2.).
If the fault still remains, handle the unit according to the local company directives.
Figure 1
Figure 2

Repair Instruction, Electrical
4/00021-2/FEA 209 544/52 A
Sony Ericsson Mobile Communications AB
4(11)
3 On/Off problems
• Check the keyboard for malfunction. If necessary clean the keyboard pads from circuit
board and/or replace the keyboard according to the Working Instructions, Mechanical.
• Check that the System Connector (Fig.1.) not is incorrectly soldered, mechanically
damaged, dirty or oxidised. If necessary replace it.
If the fault still remains, handle the unit according to the local company directives.
Figure 1

Repair Instruction, Electrical
4/00021-2/FEA 209 544/52 A
Sony Ericsson Mobile Communications AB
5(11)
4 Display/Illumination Problems
• Make visual check to ensure that the elastomer is properly in place in its housing in
Display assy (Fig. 1.). Also clean the Display pads if necessary.
• Replace the display according to the Working Instruction, Mechanical.
• In Display Illumination problems check for the incorrect soldering. Re-solder it if
needed.
If the fault still remains, handle the unit according to the local company directives.
Figure 1