Main Part; Main Electrical Troubleshooting Guide; Power (Dc-Dc Converter) Circuit - LG DP271, DP271B, LPA-837 Service Manual
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Also See for DP271, DP271B, LPA-837:
- Owner's manual (211 pages) ,
- Owner's manual (43 pages) ,
- Owner's manual (84 pages)
Table of Contents
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MAIN ELECTRICAL TROUBLESHOOTING GUIDE
1. POWER (DC-DC CONVERTER) CIRCUIT
No power on
by ADAPTOR
YES
Is ADAPTOR
out 9.5V
YES
Is D606 OK.
YES
A
A
YES
No +18V
YES
NO
Is U202
3.3V OK?
YES
NO
Is U401
3.3V OK?
MAIN PART
NO
Replace ADAPTOR
NO
Replace D606
Replace U202
Replace U401
No power on
by BATTERY
YES
Is
BATTERY OK?
YES
A
No +3.3V
Replace U401
3-11
NO
Replace BATTERY
No +5V
No LCD power
Replace JK902
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Troubleshooting
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