Read Sharp VC-M332HM (serv.man15) Service Manual online
51
VC-M332HM
VC-MH742HM
VC-MH742HM
FLOW CHART NO.31 DECODER TROUBLESHOOTING (VC-M332HM)
<Hi-Fi Audio Double scart>
MODE
SIG.
DECODER CIRCUIT
SELECT
INPUT SIGNAL
FLOW
SIG.
FLOW
INPUT
(switch)
OUTPUT
OUTPUT SIGNAL
(A)
Pin47 of IC701(Y/C video output)
E2(L2) video input
→
pin19
pin18
pin20
→
E1(L1) video output
21PIN CONNECTOR
(B)
→
(A)
Pin11 of IC201(Audio output)
E2(L2) audio input(L/R-ch)
→
pin36
pin1
pin35
→
E1(L1) audio output(L/R
-ch)21PIN CONNECTOR
(B)
→
(A)
Tuner video output
E1(L1) video input
Pin47 of IC701(Y/C video output)
→
pin16
pin14
pin19
pin23
→
E2(L2) video output
21PIN CONNECTOR
(B)
→
(C)
→
(A)
Tuner audio output(L-ch)
E1(L1) audio input(L/R-ch)
Pin11 of IC201(Audio output)
→
pin9
pin5
pin36
pin29
→
E2(L2) audio output(L/R
-ch)21PIN CONNECTOR
(B)
→
(C)
→
(A)
E2(L2) video input
E1(L1) video input
Tuner video output
→
pin18
pin14
pin16
pin21
→
Pin31 of IC201
Y/C video input
(Tuner/Aux. input)
(B)
→
(C)
→
(A)
E2(L2) audio input(L/R-ch)
E1(L1) audio input(L/R-ch)
Tuner audio output
→
pin1
pin5
pin9
pin31
→
Pin9 of IC201
Audio input
(B)
→
(C)
→
NO
NO
NO
YES
YES
YES
Check STBY 5V line.
Check STBY 11V line.
Check line between pins(25), (26)
of IC2501 and pins(27), (28) of
IC701.
Is voltage 5V applied to the video
section power terminal at pins(15),
(17) of IC2501?
Is voltage 11V applied to the
audio section power terminal at
pins(8), (10) of IC2501?
Check signal line from video and
audio function logic table as shown
below.
Not output from 21pin connector in video and audio signal.
Is there SDA and SCL signal
applied to pins(25) and (26) of
IC2501?
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