Pioneer PDP-R04E, Service Manual

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42
1 2 3 4
1 2 3 4
C
D
F
A
B
E
PDP-R04G
B
Image for the composite or S signal is not displayed
Image for the composite or
S signal is not displayed
No
Is the function corresponding
to selected signal input
selected?
No Select the corresponding
signal with the Input selector.
Has the signal arrived at
IC8002? Check the communication
between the jack and
IC8002.
Yes
Which signal is not output,
main or subsignal?
Yes
No
B
Is a signal output from
IC8002?
(44) (47)
Check around IC8002 and
check the communications
between IC8002 and the
microcomputer.
Main signal
Is a signal output from
IC8002?
(56) (58)
Has the signal arrived at
IC6255?
(52) (59)
No
Subsignal
No
A
B
A
A
Has the signal arrived at
IC6107?
(52) (59) Check the communications
between IC8002 and
IC6107.
Yes Yes
No
Check the communications
between IC8002 and
IC6255.
• For check the communication with the microcomputer,
refer to the section 6.7 SERVICE FACTORY MODE.
• The encircled numbers denote measuring point in the
Waveforms for Troubleshooting.
• Diagnosis points
Note:
No
Is the communication
between each IC on the
MR MAIN BOARD Assy and
the microcomputer normal? Check around the IC that is
found to have a failure in
communication and the
microcomputer.
Yes
No
Has the symptom been
settled when the MR MAIN
BOARD Assy is replaced?
The panel is defective.
Yes
No
Finishing troubleshooting
Yes
B
TV signal is not displayed
on the screen.
Yes
Is the Input selector set to
TV?
No
Set the Input selector to TV.
Is a signal output normally
from the FE
(U7501)? (11)
Check around the FE and
check the communications
between the FE and the
microcomputer.
Yes
No
Yes
MR MAIN BOARD ASSY
B
AV BOARD ASSY
6 5
10 9
4 3
8 7
Yes
B
Is a signal output from
IC7501?
(16) Check the communications
between the FE and IC7501
and around IC7501.
Yes
No
B
Has the signal arrived at
IC8002?
(63) Check the communications
between IC7501 and
IC8002.
Yes
No
2
1
5. TROUBLE SHOOTING