Pioneer PDP-5050SX Service Manual page 148

1
No sound from the speakers (2/2)
A
A
Is it sound for every function
that doesn't come out?
No
Has the signal arrived at
CN8657?
(23), (27)
B
No
Has the signal arrived at
CN8657?
(31), (35)
No
Is a signal output from
IC8002?
Yes
C
Has the signal arrived at
TP8662 and TP8669?
45 46
Yes
Has the signal arrived at
TP3512 and TP3513?
47 48
Yes
D
Has the symptom been
settled when the system
cable is replaced?
Yes
Finishing troubleshooting
E
F
148
1
2
Check the flexible cables
between the AV BOARD Assy
Yes
and MAIN BOARD Assy and
between the MAIN BOARD
Assy.
Yes
Replace
TUNER BOARD ASSY.
Check around IC8002 and
No
check the communications
between IC8002 and the
microcomputer.
Check around IC8003,
No
check the buffer circuits and
check the TUNER BOARD
ASSY.
Check the cable between the
No
AV BOARD Assy and AUDIO
AMP Assy.
No
Replace
AUDIO AMP ASSY.
PDP-5050SX
2
3
3
4
4