Pioneer PDP-427CMX Service Manual page 30

1
In a case of PCOUT
A
Verification of the video section
Examination of the MAIN board
Are signals input to the input terminals?
YES
Are signals input to Pins 21, 19
and 15 (for video) of IC5004?
B
YES
Are signals input to Pins 15, 13
and 10 (for video) of IC5007?
YES
C
Check the connected
equipment and its cables.
Verification of the sync section
Examination of the MAIN board
D
Are signals input to the input terminals?
YES
Are signals input to Pins 4
and 7 (for sync) of IC5005?
E
YES
Are signals input to Pins 3
and 6 (for sync) of IC5008?
YES
Check the connected
F
equipment and its cables.
30
1
2
Waveforms 20-1, 20-2
NO
Waveform 21
NO Is the voltage at Pin 16
of IC5004 5V DC?
YES
Failure in the IC5004
Waveform 22
NO
Failure in the IC5007
Waveform 23
NO
Waveform 24
NO
Is the voltage at Pin 1 of
IC5005 5V DC?
YES
Are signals input to Pins 2, 30
and 31 (for control) of IC5301?
YES
Failure in the IC5301
Waveform 26
NO
Failure in the IC5008
PDP-427CMX
2
3
Check the signal output equipment and its cables.
NO
Failure in the MAIN PWB
Check the signal output equipment and its cables.
NO
Failure in the IC5604
Waveform 25
NO
Failure in the MAIN PWB
3
4
4