LG T710BH Service Manual - Page 14
R331~R333, L311~L313
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NO CHARACTER CHECK IC302 PIN 7(5V) ? YES CHECK IC302 PIN 1, 3, 5? YES CHECK IC302 PIN 14, 16, 18 ? YES CHECK IC303 PIN 7 (105V) PIN 3 (13V) ? YES CHECK IC303 PIN 1, 2, 4 ? YES CHECK R, G, B CATHODE VOLTAGE? YES TROUBLE IN CRT SOCKET 2. NO CHARACTER NO TROUBLE IN P302 5V LINE TROUBLE IN NO PC SIGNAL, P301 SIGNAL CABLE NO TROUBLE IN IC302 NO TROUBLE IN P303 12V LINE/ 80V LINE NO TROUBLE IN IC303 NO TROUBLE IN R331~R333, L311~L313 D307~D312 - 14 -
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2. NO CHARACTER
NO CHARACTER
CHECK
IC302
PIN 7(5V) ?
CHECK
IC302 PIN 1, 3, 5?
CHECK
IC302 PIN 14, 16, 18 ?
CHECK
IC303
PIN 1, 2, 4 ?
CHECK
IC303
PIN 7 (105V)
PIN 3 (13V) ?
TROUBLE IN
P302 5V LINE
TROUBLE IN
PC SIGNAL,
P301 SIGNAL CABLE
TROUBLE IN
IC302
TROUBLE IN
P303 12V LINE/
80V LINE
TROUBLE IN
IC303
NO
YES
NO
NO
YES
YES
YES
YES
NO
NO
CHECK
R, G, B CATHODE
VOLTAGE?
TROUBLE IN
R331~R333, L311~L313
D307~D312
TROUBLE IN
CRT SOCKET
YES
NO