LG HBLG6000R Service Manual - Page 20

ELECTRIC PARTS TROUBLESHOOTING GUIDE, Possible Trouble 1

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ELECTRIC PARTS TROUBLESHOOTING GUIDE: Possible Trouble 1 • The unit does not operate. NO Is the Trans output power AC 115V? YES Is the Trans output power NO about AC 14V? YES Is output Voltage of IC01D NO DC 12V? YES Is output Voltage of IC02D NO DC 5V? YES Is the reset circuit all right? NO (The No.14 of Micom is 5V.) YES Is the connection between NO Main and Display all right? YES NO Is the voltage No.18 of Micom DC 5V? YES Exchange Main P.W.B Ass'y. • Check the Fuse. • Check the wiring diagram. Is shorted the Trans. output? NO • Check the Main P.W.B pattern. YES • Exchange the Trans. • Exchange D02D~D05D. • Exchange IC01D. • Exchange IC02D. • Exchange IC01A. • Connect connector exactly. • Check the P.W.B pattern. -20-

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20
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Is the Trans output power
AC 115V?
Is the Trans output power
about AC 14V?
Is shorted the Trans. output?
Is output Voltage of IC01D
DC 12V?
Is output Voltage of IC02D
DC 5V?
Is the voltage No.18 of Micom
DC 5V?
Exchange Main P.W.B Ass'y.
Is the
connection between
Main and Display
all right?
Is the reset circuit all right?
(The No.14 of Micom
is 5V.)
•
Check the Fuse.
•
Check the wiring diagram.
•
Check the Main
P.W.B pattern.
•
Exchange the Trans.
•
Exchange D02D~D05D.
•
Exchange IC01D.
•
Exchange IC02D.
•
Exchange IC01A.
•
Connect connector
exactly.
•
Check the
P.W.B
pattern.
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
YES
ELECTRIC PARTS TROUBLESHOOTING GUIDE:
Possible Trouble 1
•
The unit does not operate.