Pioneer PDP-427CMX Service Manual page 39

5
4. Failure of a remote control unit
The remote control unit does not work.
Is the signal shown below output from
Pin 6 of CN9010 on the MAIN PWB?
NO
Is the signal shown below output from
Pin 10 of IC2301 on the COMM SLOT I/F
PWB?
1V
NO
Is the signal shown below output from
Pin 1 of CN2401 on the LED PWB?
NO
Failure in the U2401 of LED PWB
5
6
YES
5Vp-p
YES
4Vp-p
YES
4.4Vp-p
PDP-427CMX
6
7
Failure in the MAIN PWB
Failure in the IC2301 of
COMM SLOT I/F PWB
Failure in the Q2302 or
Q2301 of COMM SLOT
I/F PWB
7
8
A
B
C
D
E
F
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