No Tv, External Input Video Signal - LG RH-2320 Service Manual

11. NO TV, EXTERNAL INPUT VIDEO SIGNAL

No TV, external input
video signal
No video
signal of external
input AV3
(Front
RCA input)
YES
R905 :
Is there a signal?
IC901 Pin (56, 57, 58,
61,62, 63, 64, 65) VIND2-VIND9
is there a signal
Check no RGB / Component / Composite /
S-VIDEO signal when play DISC
LGE Internal Use Only
Check
NO
cable connection &
input signal
.
YES
When cable
connecting tuner
NO
and rear SCART 1, 2
no TV video signal
(AV1/2)
YES
C843, C863, C864 :
Is there a signal?
YES
IC 801 Pin 42 :
Is there a signal?
YES
NO
Check Pin 51
/RST_SAA7138
YES
X901
(24.576MHz)
oscillated?
YES
R906,
R909 (SCL/SDA), L917
(VinCLK)
YES
IC901 defect
3-16 Copyright © 2008 LG Electronics. Inc. All right reserved.
Check
IC801 Pin 14
NO
(12V) Pin 30
(5, 3V) Pin 31,
32 (SCL, SDA)
:
YES
Replace
IC801
Check
NO
IC1302 reset
circuit
NO Change
X901
Check
NO
IC901 power
3.3V & 1.8V
Only for training and service purposes
.