Pioneer PDP-507XC Service Manual page 22

1
A
Has the sound been emitted
from the headphone?
B
C
• Waveforms
L/R 1kHz input
IC4701 (35)
43
V:1V/div H:400 sec/div
Stop
D
IC4701 (32)
47
V:1V/div H:400 sec/div
Stop
E
F
22
1
2
D
NO NO
Is sound muting set?
NO NO
Is the volume set to 0?
NO NO
Is a signal output from
IC4701?(31)(32)
YES YES
Check the FFC between
CN8801 and CN4004 or
between CN9003 and CN4005.
OK OK
Is a signal output from
IC9001?(1)(7)
YES YES
Check the cables between
CN9001 and CN9202 or
between CN9002 and CN9205,
and check around the
headphone jack.
IC4701 (36)
44
V:1V/div H:400 sec/div
Stop
IC9001 (1)
48
V:1V/div H:400 sec/div
Stop
PDP-507XC
2
3
YES YES
Cancel muting, then check again.
YES YES
Turn up the volume, then check again.
NO NO Check IC4701 and peripheral circuits and the
communication between IC4701 and microcomputer.
46 47
If there is no problem, replace the MAIN Assy.
NG NG
Replace the FFC.
NO NO Check IC9001 and peripheral circuits, and repair
the failure points.
48 49
NG NG
Replace the cables .
IC4701 (33)(34)
45
V:500mV/div H:400 sec/div
Stop
IC9001 (7)
49
V:1V/div H:400 sec/div
Stop
3
4
IC4701 (31)
46
V:1V/div H:400 sec/div
Stop
4