Page 1
Trouble Shooting Guide, Electrical
Trouble Shooting Guide, Electrical
Applicable for K200 and K220
Contents
1
General............................................................................................................... 2
2
Repair Actions for Manual Test Failures......................................................... 3
2.1
Power on/off .......................................................................................... 3
2.2
Audio ..................................................................................................... 3
2.3
SIM ........................................................................................................ 3
2.4
Display................................................................................................... 3
2.5
Illumination ............................................................................................ 3
2.6
Camera.................................................................................................. 3
2.7
Charging................................................................................................ 3
2.8
Infra Red................................................................................................ 3
2.9
FM Radio (K220 only) ........................................................................... 3
2.10
Network ................................................................................................. 3
3
Revision History................................................................................................ 4
4/000 21-2/FEA 209 544/127 B
©
Company Internal
Sony Ericsson Mobile Communications AB
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Trouble Shooting Guide, Electrical
1 General
The purpose of this document is to indicate the electrical level repair actions associated with
the different failure symptoms.
For symptoms that have multiple repair actions, the repair actions are listed in order of their
probability of creating a successful repair. The first action has the highest probability, and
subsequent actions have lower probabilities. The intention is for the repair technician to
implement the first repair action and then retest the phone. If the phone continues to fail the
same test, then the technician should continue to the second repair action. If the phone
continues to fail the same test after all of the repair actions are exhausted, then the phone will
be considered not reparable at this level.
This document should be used only after the actions from the Mechanical Trouble Shooting
Guide have been exhausted for the specific symptom.
Voltage, current, and resistance information is provided for some symptoms to enable faster
repairs. Perform current measurements using a dummy battery and power supply with digital
current display. The phone should be fully assembled. Perform voltage and resistance
measurements with a multimeter. Purchasing this equipment and performing these
measurements is optional but recommended.
Perform current measurements using a
dummy battery and power supply with digital
current display. The phone should be fully
assembled.
Perform voltage measurements with a
multimeter.
Perform resistance measurements with a
multimeter.
4/000 21-2/FEA 209 544/127 B
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Company Internal
Sony Ericsson Mobile Communications AB
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Trouble Shooting Guide, Electrical
2 Repair Actions for Manual Test Failures
Failure Failure Symptom Repair Action
2.1 Power on/off
2.2 Audio
2.3 SIM
2.4 Display
2.5 Illumination
2.6 Camera
2.7 Charging
2.8 Infra Red
2.9 FM Radio (K220 only)
2.10 Network
Can’t power on Replace J305 (Battery connector)
Loudspeaker problem Replace U306
Insert SIM Replace J302 (SIM reader)
No display Replace J308 (Display)
No Display Illumination Replace U307, J308 (Display)
No Keyboard Illumination Replace D314, D316, D319, D360
Charging LED Red Replace D317
No/bad picture Replace J402 (Camera socket)
No charging Replace U604
Charging Full / batt not
fully charged
No Irda Communication U605 (Irda Module)
Radio problems U702, U606
No/bad network Replace J602 (Antenna connector)
Replace R201
4/000 21-2/FEA 209 544/127 B
©
Company Internal
Sony Ericsson Mobile Communications AB
3(4)
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Trouble Shooting Guide, Electrical
3 Revision History
Rev. Date Changes / Comments
A 2007-05-04 1st preliminary version
B 2007-09-21 New component added, R201
4/000 21-2/FEA 209 544/127 B
©
Company Internal
Sony Ericsson Mobile Communications AB
4(4)
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