34
2. Analog video
YES
YES YES
YES
MONITOR OUT(CVBS) Output NG
Check ±5VV
+5VV : C7810
-5VV : C7811
Check output
Output V : IC781-1pin
Check cable between AMP and monitor
or Check monitor.
Check set value of IC.
SW2 : IC781-10pin : 3.3V : OK
SW5 : IC781-2pin : 3.3V : OK
The IC781 and surrounding
circuitry is defective.
The power supply circuitry is
defective.
Check input
(When the SAT/CBL function)
Vin3 : IC781-7pin
Check pattern from JK781 to IC781 and
check cable between AMP and player or
check player .
CPU(IC711) aw.
NO
NO NO
NO
Pb
1.+12V
2.VGND
3.-12V
4.CVBS_SW2
5.CVBS_SW5
6.+5VD
7.OPT1_IN
8.DGND
9.OPT2_IN
CN781_1 PIN
(+12V TP)
(+12V TP)
CN781_3 PIN
C7808
C7809
C7803
C7802
C7806
C7807
C7801
C7714
C7715
C7812
C7815
C7814
R7806
R7804
R7803
R7802
R7801
IC781
SW2
+5VV
Output V
SW5
Input V
-5VV
VIDEO test point
VIDEO PCB (B SIDE)
To Next Page
Loading...
