Tv, External Input Video Signal - LG RC-185 Service Manual

VDR ELECTRICAL TROUBLESHOOTING GUIDE
4. NO TV, EXTERNAL INPUT VIDEO SIGNAL
No : TV signal
YES
TU701 1-19
Check signal
And circuit
YES
IC802 - 28
YES
IC301 - 15
YES
IC301 – 29 check
YES
Q310 collector
Signal, power 12 V
YES
C909, Q905
Check circuit
YES
L1514
Check signal
No : AV1 signal
YES
NO
IC802 - 1
YES
IC802 – 31
Check output
YES
IC1501-64 : HIGH
/RST_VDEC
YES
When reset IC501
– 59, 60 Check I
2
Clk, Data
YES
Check IC1501 -
108 (VI_CLK)
YES
IC1501 -> IC1101
Check VI_D0~VO_D7
signal
YES
<When playing DISC, no COMPONENT,
COMPOSIT/S-VIDEO signal> Check
No : AV2 signal
YES
NO
IC802 - 3
YES
NO
R1564, R1456,
R1458 signal
Check R1515,
NO
C R1516 Signal and
3.3V &1.8V level
NO
Check X1501
clock oscillated
Check IC1501
NO
power and other
circuits
3-71
No : S-JACK
AV3
YES
IC1501 – 19,
NO
IC301 - 17 27, 33 check in
the DVD Board
YES
IC301 – 21
NO
Replace X1501
X-TAL
signal
YES
YES
check
YES