General Information; Diagnosis; Troubleshooting - Pioneer PDP-R05U Service Manual

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7. GENERAL INFORMATION

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7.1 DIAGNOSIS

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7.1.1 TROUBLESHOOTING

A
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?
Yes
B
Has the signal arrived at
IC8002?
B
Yes
C
Which signal is not output,
main or subsignal?
TE
L 13942296513
Main signal
Is a signal output from
IC8002?
B
3 4
(44) (47)
Yes
D
Has the signal arrived at
IC6107?
A
7 8
(52) (59)
Yes
Is the communication
between each IC on the
MR MAIN BOARD Assy and
the microcomputer normal?
Yes
Has the symptom been
E
settled when the MR MAIN
BOARD Assy is replaced?
Yes
Finishing troubleshooting
www
F
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http://www.xiaoyu163.com
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No Select the corresponding
signal with the Input selector.
Check the communication
No
between the jack and
IC8002.
Subsignal
Check around IC8002 and
No
check the communications
between IC8002 and the
microcomputer.
Check the communications
No
between IC8002 and
IC6107.
Check around the IC that is
No
found to have a failure in
communication and the
microcomputer.
No
The panel is defective.
x ao
y
. i
PDP-R05U
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http://www.xiaoyu163.com
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8
TV signal is not displayed
on the screen.
Yes
Is the Input selector set to
TV?
Yes
Is a signal output normally
from the FE
1
(U7501)? (18)
Yes
Has the signal arrived at
IC8002?
2
(63)
Yes
Q Q
3 6 7 1 3
Is a signal output from
No
IC8002?
5 6
(56) (58)
Yes
Has the signal arrived at
IC6255?
9 10
(52) (59)
Yes
Note:
• Diagnosis points
A
MR MAIN BOARD ASSY
B
AV BOARD ASSY
u163
• 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.
3
4
2 9 9 4 2 8
No
Set the Input selector to TV.
Check around the FE and
No
check the communications
B
between the FE and the
microcomputer.
Check the communications
No
between U7501 and
B
IC8002.
1 5 0 5 8 2 9 9 4
B
Check the communications
No
between IC8002 and
A
IC6255.
m
co
4
9 9
2 8 9 9