Pioneer PDP-42MXE20, Service Manual

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PDP-427CMX
21
5 6 7 8
5 6
7
8
C
D
F
A
B
E
NO
YES
Failure in the CN2301 or LED PWB (failure in
the M5V line at Pin 8 of the CN2401)
NO
NO
YES
Failure in the COMM SLOT Assy (failure in the
M3.3V line at Pin 118 of the CN2303)
YES
Failure in the CN2302 or COMM SLOT IF PWB
(failure in the M3.3V line at Pin 16 of the CN2302)
NO
YES
NO
YES
Failure in the CN2302 or COMM SLOT IF PWB
(failure in the M5V line at Pin 20 of the CN2302)
Is 5 V DC output from Pin 5
of IC9502? Failure in the MAIN PWB
(failure in the IC9502)
NO
YES
Failure in the CN4004 or COMM SLOT IF PWB
(failure in the M3.3V line at Pin 1 of the CN4004)
Failure in the CN2201 or KEY PWB (failure in the
M3.3V line at Pin 1 of the CN9011)
NO
YES
NO
Is 3.3 V DC output from Pin
4 of IC9503? Failure in the MAIN PWB
(failure in the IC9503)
YES
NO (4.7V) Is 0 V DC output from Pin
14 of CN8502 (AD2)?
YES
Failure in the MAIN PWB (failure in IC9501 or X9501)
Note: If IC9501 is in failure, replace the whole board.
Failure in the AD2 connector or MAIN PWB (failure in
IC9501 or X9501)
Note: If IC9501 is in failure, replace the whole board.
A
Turn the main power on with the cable to the CN2401 or CN2301
disconnected. Check if 5 V DC is output from Pin 8 of CN2301.
Turn the main power on with the cable to the CN2302 or CN9010
disconnected. Check if 5 V DC is output from Pin 20 of CN9010.
Turn the main power on with the COMM SLOT Assy disconnected from
CN2303. Check if 3.3 V DC is output from Pin 118 of CN2303.
Turn the main power on with the cable to the CN2302 or CN9010
disconnected. Check if 3.3 V DC is output from Pin 16 of CN9010.
Turn the main power on with the cable to the CN4004 or CN5301
disconnected. Check if 3.3 V DC is output from Pin 50 of CN5301.
Turn the main power on with the cable to the CN2201 or CN9011
disconnected. Check if 3.3 V DC is output from Pin 1 of CN9011.