No Composite/S-Video Signal When Playing Disc - LG RH4820W Service Manual

13. No composite/S-Video signal when playing DISC

No COMPOSIT signal?
YES
IC804 – 29, 30
Check output
YES
Check R918, C925
YES
IC806 – 23
Check output
YES
Check R821,C891
YES
IC502 - 33 : HIGH ?
/RST_7302
YES
IC502 –21,22
Check I2C CLK, DATA
YES
IC502-32
Check Clock signal input
YES
IC502-4~30 Check
VO_D0-~VO_D15 signal
YES
IC101 => IC502 Check
VO_D0 ~ VO_D15 signal
S-VIDEO: No Y signal?
YES
Check R810, C927
YES
IC806 – 21
Check output
YES
Check R956, C896
NO
IC311-5
Check signal
NO
Check IC501-31,32
Signal and 5v power
NO
Check R114 CLOCK
YES
Check IC502 power and
other circuits
3-12
S-VIDEO : No C signal?
YES
Check R804,C892
YES
IC806 – 26
Check output
YES
Check R954, C898