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
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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
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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
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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
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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

Repair Instruction, Electrical
4/00021-2/FEA 209 544/52 A
Sony Ericsson Mobile Communications AB
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5 Capacity/Charging Problems
• Check that the System Connector (Fig. 1.) is not incorrectly soldered, mechanically
damaged, dirty or oxidised. If necessary replace it.
• Check that the Battery Connector (Fig. 2.) is not incorrectly soldered, mechanically
damaged, dirty or oxidised. If necessary replace it by BGA replacement machine or Hot
air blower.
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
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6 Key Problems
• Use the Service Test menu, choose Service tests/Keyboard.
• Make sure if it is the Keyboard that causes the problem. Check keyboard pads and key
domes for damage, dust, dirt, moisture and oxidation. Clean if needed.
• If it is the Keyboard that causes the problem, replace the Keyboard.
6.1 Volume Switch does not work
• Check Volume Switch soldering.
• If Volume Switch that causes the problem, replace the Volume Switch (Fig. 1.)
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
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7 Alert Problems
7.1 Buzzer
• Use the Service Test menu, choose Buzzer.
• Activate the buzzer using the keymat.
• If it sounds low or distorted open the phone and inspect the Buzzer (Fig. 1.) and the
buzzer gasket in front cover.
• Check the Buzzer (Fig. 1.) for faulty soldering joints.
• If necessary re-solder or change the Buzzer. If the problem is in the buzzer gasket,
replace the Front cover.
If the fault still remains, handle the unit according to the local company directives.
7.2 Vibrator
• Use the Service Test menu, choose Vibrator.
• Activate the Vibrator using the keymat.
• If it does not vibrate, open the phone and inspect the Vibrator (Fig. 2.) and vibrator
contact springs. Check vibrator pads (Fig. 3.) for damage and oxidation. Clean if
needed.
• If necessary, change the Vibrator.
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
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Figure 3

Repair Instruction, Electrical
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Sony Ericsson Mobile Communications AB
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8 Software Problems
• If there are problems with the response of the keyboard commands and/or spelling
errors in the menu, that are not related to mechanical damage, make a master reset and
flash the phone with the latest soft ware from EMMA II.
• Checking the software revision can be done in the Service info, see Test Instruction,
Electrical. Choose: Service info / SW information. The Software revision and date are
shown in the display.
If the fault still remains, send the unit on, according to the local company directives.
9 SIM Problems
• There is only SIM-fault if Insert card or Card error is displayed.
• Check the SIM Connector (Fig. 1.) for dust or dirt, bad solder joints and mechanical
damage. If necessary replace it by BGA replacement machine or Hot air blower.
If the fault still remains, send the unit on, according to the local company directives.
Figure 1

Repair Instruction, Electrical
4/00021-2/FEA 209 544/52 A
Sony Ericsson Mobile Communications AB
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10 Revision History
Rev. Date Changes / Comments
A 2002-05-20 First release repair concept