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