Pioneer PDP-507CMX Service Manual page 95

5
Trouble shooting of the A+6.5V output abnormal operation
This voltage Line is supplied to MAIN Assy from MAIN POWER SUPPLY Unit via DD Assy.
Please check board to board connection first if A+6.5V is abnormal.
e.g.) pin contact of connector, short between wire
From POWER SUPPLY unit
From POWER SUPPLY unit
Flowchart of Failure Analysis for The SLOT Power Supply
Failure analysis for the
SLOT power supply
5
6
P12 CN304 (pin 1)
P8 CN302 (pin 1)
No
Are 12V supplied to pins 1 and 2
of CN4001?
Yes
No
Are 16.5V supplied to pin 5 of
CN4001?
Yes
No
Are 13.5V output from pin 3 of
IC4003?
Yes
No
Are 3.3V supplied to pins 7 and 8
of CN4001?
Yes
No
Are 3.3V supplied to pin 11 of
CN4001?
Yes
Failure analysis for the Each
SLOT Input terminals
PDP-507CMX
6
7
PV CN306 (pins 3 and 4)
DD ASSY
Failure in the DD Assy or harness
ADX3435
Failure in the DD Assy, POWER
SUPPLY Unit or harness
ADX3435
Failure in the IC4003
Failure in the DD Assy or harness
ADX3435
Failure in the DD Assy, POWER
SUPPLY Unit or harness
ADX3435
7
8
To MAIN ASSY
8
A
B
C
D
E
F
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