Service manual

8-6 FL10.5TR
[ Audio Signal Section ]
Check SP2801,SP2802 and their periphery circuit,
and service it if defective.
Are the audio(L/R) signals inputted to Pin(19, 32)
of IC2801?
Ye s
Ye s
No
Are the audio(L/R) signals outputte
d to CN2801 and
CN2802?
Check IC2801 a
nd their periphery circuit, and
service it if defective.
No
Ye s
Ye s
Ye s
Ye s
Check the line b
etween Pin(26, 28) of CN2103 and
Pin(19, 32) of IC2801, and service it if def
ective.
Replace Digital Main CBA Unit.
Is 5V voltage supplied to the Pin(2, 29, 33, 39, 44) of IC2701?
Is 8V voltage supplied to the Pin(12) of IC2701?
Replace IC2701.
Check P-ON+5V, P-ON+8V line
and service it if defective.
Ye s
No
Yes
(Output to speakers)
Ye s
(Output to audio
output terminal)
FLOW CHART NO.1
Audio is not outputted. (EXT. input)
Are the audio(L/R) signals inputted to each pin of
IC2701?
Check the line between audio input terminal and
each pin of IC2701.
Are the audio(L/R) signals outputted to Pin(27, 28) of
IC2701?
Are the audio(L/R) signals outputted to Pin(26, 28) of
CN2103?
Ye s
No
No
No
No
Replace Digital Main CBA Unit.
Are the audio(L/R) signals outputted to Pin(4, 6) of
CN2103?
No
IC2701 AUDIO(L/R)-IN 1
AUDIO(L/R)-IN 2
COMPONENT AUDIO(L/R)-IN
HDMI AUDIO(L/R)-IN
AUDIO(L/R)-IN 1
AUDIO(L/R)-IN 2
COMPONENT AUDIO(L/R)-IN
HDMI AUDIO(L/R)-IN
14,15PIN
IC2701 16,17PIN
IC2701 18,19PIN
IC2701 24,25PIN
14,15PIN
16,17PIN
18,19PIN
24,25PIN
IC2701
IC2701
IC2701
IC2701
→ JK2704, JK2705
→ JK2708, JK2709
→ JK2710, JK2711
→ JK2720, JK2721
Are the audio(L/R) signals inputted to Pin(3, 5)
of IC2802?
Check the line b
etween Pin(4, 6) of CN2103 and
Pin(3, 5) of IC2802, and
service it if defective.
No
Are the audio(L/R) signals outputte
d to Pin(1, 7)
of IC2802?
Check the line betw
een Pin(1, 7) of IC2802 and audio
output terminal(JK2801
, JK2802) and service it if defective.
Replace IC2802