8-6
PL10.5TR
[ 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?
Yes
Yes
No
Are the audio(L/R) signals outputted to CN2801 and
CN2802?
Check IC2801 and their periphery circuit, and
service it if defective.
No
Yes
Yes
Yes
Yes
Check the line between Pin(26, 28) of CN2103 and
Pin(19, 32) of IC2801, and service it if defective.
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.
Yes
No
Yes
(Output to speakers)
Yes
(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?
Yes
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 between Pin(4, 6) of CN2103 and
Pin(3, 5) of IC2802, and service it if defective.
No
Are the audio(L/R) signals outputted to Pin(1, 7)
of IC2802?
Check the line between Pin(1, 7) of IC2802 and audio
output terminal(JK2801, JK2802) and service it if defective.
Replace IC2802
