LG CS990D-EP Service Manual page 20

NO CHARACTER
CHECK
IC302 PIN 3, 8, 12 (12V),
PIN 17 (5V)?
YES
CHECK
IC302 PIN 2, 6, 11 ?
YES
CHECK
IC302 PIN 29, 32, 35 ?
YES
CHECK
R, G, B CATHODE
VOLTAGE?
YES
TROUBLE IN
CDT SOCKET
2. NO CHARACTER
NO
NO
NO
NO
- 20 -
TROUBLE IN
P302,
5V, 12V LINE
TROUBLE IN
PC SIGNAL,
SIGNAL CABLE
TROUBLE IN
IC302
TROUBLE IN
IC303