JVC LT-19D200 - Page 26

1-26 (No.YA711<Rev.002>)
[ Audio Signal Section ]
Check SP861,SP862 and their periphery circuit,
and service it if defective.
Are the audio(L/R) signals inputted to Pin(1, 9)
of IC801?
Ye s
Ye s
Ye s
Audio is not outputted normally.(Audio input)
FLOW CHART NO.1
Are the audio(L/R) signals inputted to Pin(2, 15)
of IC771?
Check the line between Pin(2, 15) of IC771 and input
terminal(JK753, JK754), and service it if defective.
No
No
Are the audio(L/R) signals outputted to Pin(4, 6)
of IC801?
Check IC801 and their periphery circuit, and
service it if defective.
No
Ye s
Are the audio(L/R) signals inputted to Pin(6, 8) of
CN301?
Replace Digital Main PWB Unit.
Check the line between Pin(1, 7) of IC803 and
Pin(1, 9) of IC801, and service it if defective.
Are the audio(L/R) signals inputted to Pin(3, 5)
of IC803?
No
Ye s
Check the line between Pin(6, 8) of CN301 and
Pin(3, 5) of IC803, and service it if def
ective.
Are the audio(L/R) signals outputted to Pin(1, 7)
of IC803?
No
Ye s
Replace IC803
No
Check SP861,SP862 and their periphery circuit,
and service it if defective.
Are the audio(L/R) signals inputted to Pi
n(1, 9)
of IC801?
Ye s
Ye s
Ye s
Audio is not outputted normally.(Component Audio input)
FLOW CHART NO.2
Are the audio(L/R) signals inputted to Pin(4, 11)
of IC771?
Check the line between Pin(4, 11) of IC771 and input
terminal(JK741, JK742), and service it if defective.
No
No
Are the audio(L/R) signals outputted to Pin(4, 6)
of IC801?
Check IC801 and their periphery circuit, and
service it if defective.
No
Ye s
Are the audio(L/R) signals inputted to Pin(6, 8) of
CN301?
Replace Digital Main PWB Unit.
Check the line between Pin(1, 7) of IC803 and
Pin(1, 9) of IC801, and service it if defective.
Are the audio(L/R) signals inputted to Pin(3, 5)
of IC803?
No
Ye s
Check the line between Pin(6, 8) of CN301 and
Pin(3, 5) of IC803, and service it if defective.
Are the audio(L/R) signals outputted to
Pin(1, 7)
of IC803?
No
Ye s
Replace IC803
No