Pioneer PDP-507XC Service Manual page 18

1
Flowchart of Failure Analysis for The Video-system Assy
A
No monitor output
MONI_V
MONITOR OUT image is not displayed.
YES
Is a signal being input other than the
component , HDMI signal or PC signal?
YES
Has the signal arrived to IC4701 ?
YES
Is a signal output from IC4701? (79)
YES
B
Is a signal arrived to CN8801 ?
YES
Is a signal output from jack.
YES
Finishing troubleshooting
*Input image is a color bar in all cases
• Waveforms
C
IC4701 (79)
39
V:1V/div H:20 sec/div
Stop
D
E
F
18
1
2
NO
Only the component , HDMI signals and PC
signal cannot be output from MONITOR
OUT.
NO Check the communication between the jack
and IC4701. If there was no problem
replace IO Ass'y
NO
Check around IC4701 and check the
communications between IC4701 and the
39
microcomputer.If there was no problem then
replace IC4701
NO Check the communication from IC4701 to
CN4004. If there is no ploblem, check the
40
Flexible cable between CN4004 and CN8801.
NO
Check the communication between the
CN8801 and Jack.If there was no problem
replace IO Ass'y
R9077
40
V:1V/div H:20 sec/div
Stop
PDP-507XC
2
3
NG
Replace flexible cable
3
4
4