LG STUDIOWORKS 77M Service Manual page 7
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Also See for STUDIOWORKS 77M:
- User manual (25 pages) ,
- User manual (20 pages) ,
- User manual (18 pages)
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NO CHARACTER
CHECK
IC302 PIN 7, 15, 18,
21(8V) ?
YES
CHECK
IC302 PIN 6, 8, 10 ?
YES
CHECK
IC302 PIN 16, 19, 22 ?
YES
CHECK
IC303 PIN 6 (70V)
10 (12V) ?
YES
CHECK
IC303
PIN 1, 3, 5 ?
YES
CHECK
R, G, B CATHODE
VOLTAGE?
YES
TROUBLE IN
CRT SOCKET
2. NO CHARACTER
NO
NO
NO
NO
NO
NO
TROUBLE IN
P302 12V LINE, IC304
TROUBLE IN
PC SIGNAL,
P301 SIGNAL CABLE
TROUBLE IN
IC302
TROUBLE IN
P302 12V LINE/70V LINE
TROUBLE IN IC303
TROUBLE IN
R338~R341,
R344, R345, L302~L304,
D307~D310, D312, D313
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