SERVICE MANUAL - Encompass Imaging

[ Audio Signal Section ]
FLOW CHART NO.1
Audio is not outputted normally.(Audio input)
Are the audio(L/R) signals inputted to Pin(2, 15)
of IC771?
Yes
Are the audio(L/R) signals inputted to Pin(6, 8) of
CN301?
Yes
Are the audio(L/R) signals inputted to Pin(3, 5)
of IC803?
Yes
Are the audio(L/R) signals outputted to Pin(1, 7)
of IC803?
Yes
Are the audio(L/R) signals inputted to Pin(1, 9)
of IC801?
Yes
Are the audio(L/R) signals outputted to Pin(4, 6)
of IC801?
Yes
Check SP861,SP862 and their periphery circuit,
and service it if defective.
FLOW CHART NO.2
Audio is not outputted normally.(Component Audio input)
Are the audio(L/R) signals inputted to Pin(4, 11)
of IC771?
Yes
Are the audio(L/R) signals inputted to Pin(6, 8) of
CN301?
Yes
Are the audio(L/R) signals inputted to Pin(3, 5)
of IC803?
Yes
Are the audio(L/R) signals outputted to Pin(1, 7)
of IC803?
Yes
Are the audio(L/R) signals inputted to Pin(1, 9)
of IC801?
Yes
Are the audio(L/R) signals outputted to Pin(4, 6)
of IC801?
Yes
Check SP861,SP862 and their periphery circuit,
and service it if defective.
No
No
No
No
No
No
No
No
No
No
No
No
Check the line between Pin(2, 15) of IC771 and input
terminal(JK753, JK754), and service it if defective.
Replace Digital Main CBA Unit.
Check the line between Pin(6, 8) of CN301 and
Pin(3, 5) of IC803, and service it if defective.
Replace IC803
Check the line between Pin(1, 7) of IC803 and
Pin(1, 9) of IC801, and service it if defective.
Check IC801 and their periphery circuit, and
service it if defective.
Check the line between Pin(4, 11) of IC771 and input
terminal(JK741, JK742), and service it if defective.
Replace Digital Main CBA Unit.
Check the line between Pin(6, 8) of CN301 and
Pin(3, 5) of IC803, and service it if defective.
Replace IC803
Check the line between Pin(1, 7) of IC803 and
Pin(1, 9) of IC801, and service it if defective.
Check IC801 and their periphery circuit, and
service it if defective.
8-7 A91N3TR