LG-GOLDSTAR CB-29H40 Repair Manual

NO COLOR
(Autoprograming, Picture OK)
Are the R-Y, B-Y signal of pin29, 30
of IC501 normal?NO
Check/Replace IC501,
YesX501, X502
Are the R-Y, B-Y signal of pin31, 32
of IC501 normal?NO
Check/Replace IC502.
YesCheck 12V line, R-Y, B-Y
line
Are R, G, B signal of pin19, 20, 21
of IC501 normal?NO
YesCheck/Replace IC501
Check/Replace P901A, P901B,
IC901
NO TELETEXT
Check the voltage 5V of
pin1 of IC805
Abnormal48.~5.2V
NO
Check the 5V line to beCheck video signal pin9
correct.of IC701
NO
Check video signal at theYes
pin38 of IC501
YesCheck I2C BUS lines
Check/Replace IC501(SDA, SCL)
OKCheck/Replace Q506,
Q1101, C709
Check pin16, 17, 18, 20
Abnormalof IC701
Check/Replace IC701,
X701, L701, R702, C713
Check/Replace
D505~508, C516~518