Pioneer PDP-504CMX, Service Manual

Page: 137 / 191

PDP-504CMX/1
137
5 6 7 8
5 6
7
8
C
D
F
A
B
E
7.1.7 TROUBLESHOOTING
Video
Image of INPUT 1 not
displayed (RGB)
Yes
No
Is INPUT 1 selected
with the input selector?
Has the signal arrived at
CN7605 on the AV I/O
Assy?
Select INPUT 1.
Yes
Yes
Sub
Main
Which signal is not output,
main or subsignal?
Has the signal arrived at
IC6001 on the RGB
Assy?
No
No
Yes
AV I/O Assy
1 2 3 4 5
RGB Assy
6 7 8
C
B
Image of INPUT 3 not
displayed (Y/C)
Yes
No
Is a signal output from IC6255
on the VIDEO SLOT Assy?
Yes
Yes
Sub
Main
Which signal is not output,
main or subsignal?
Has the signal arrived at
IC5801 on the RGB
Assy? (Digital RGB)
No
VIDEO SLOT Assy
- = ~ ! @
Input pin of IC5801
C
B
Image of INPUT 4 not
displayed (CVBS)
Yes
Is a signal output from IC6107
on the VIDEO SLOT Assy?
Yes
Yes
Sub
Main
Which signal is not output,
main or subsignal?
Has the signal arrived at
IC5801 on the RGB
Assy? (Digital RGB)
Has the signal arrived at
IC6602 on the RGB
Assy?
No
VIDEO SLOT Assy
2 3 4 5 6
Input pin of IC5801
C
B
Image of INPUT 5 not
displayed
Yes
Is a signal output from IC7902
on the VIDEO SLOT Assy?
Yes
No
Yes
Sub
Main
Which signal is not output,
main or subsignal?
VIDEO SLOT Assy
^ & *
RGB Assy
! @ #
C
A
C
B
Image of INPUT 2 not
displayed
Yes
No
Is INPUT 2 selected
with the input selector?
Is a signal output from
IC7503 on the AV I/O
Assy?
Select INPUT 2.
Check the communication up
to IC6001 on the RGB Assy.
Check communication up
to IC6602 on the RGB
Assy.
Check communication
between the IC6255 and
RGB Assy.
Check communication
between the IC6107 and
RGB Assy.
Check communication
between the input
terminal and IC6255.
No
Check communication
between the input
terminal and IC6107.
No
Check communication
between the input
terminal and IC7902.
Check communication from
the input terminal to IC7610
to CN7605.
Yes
Yes
Yes
Is the communication
between each IC and
the main microcomputer
normal?
Does the symptom go
away when the RGB
Assy is replaced?
Finishing
troubleshooting
Finishing
troubleshooting
Yes
No
Check around IC7503.
No
No
Does the symptom go
away when the DIGITAL
VICEO Assy is replaced?
Yes
Output pin of IC7503
Has the signal arrived at
IC5701 on the RGB
Assy?
No
Check the connection between
the AV I/O Assy and RGB Assy.
No
Check around the IC that is
found to have a failure in
communication and the
microcomputer.
The panel is
defective.
Yes
Input pin of IC5701
B
A