Read Sharp VC-S2000 (serv.man2) Service Manual online
49
VC-S2000HM
FLOW CHART NO.27 DECODER TROUBLESHOOTING
<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
Front video input
→
pin7
pin28
pin13
pin25
→
E1(L1) video output
21PIN CONNECTOR
(B)
(C)
→ →
(A)
(B)
(C)
Pin58 of IC6301(Audio output L-ch)
E2(L2) audio input(L-ch)
Front audio input(L-ch)
→
pin2
pin33
pin11
pin42
→
E1(L1) audio output(L-ch)
21PIN CONNECTOR
→ →
(A)
Pin56 of IC6301(Audio output R-ch)
E2(L2) audio input(R-ch)
Front audio input(R-ch)
→
pin1
pin34
pin10
pin43
→
E1(L1) audio output(R-ch)
21PIN CONNECTOR
(B)
→
(C)
→
(A)
Tuner video output
E1(L1) video input
Pin47 of IC701(Y/C video output)
→
pin18
pin23
pin7
pin26
→
E2(L2) video output
21PIN CONNECTOR
(B)
→
(C)
→
(A)
MPX output(L-ch)
E1(L1) audio input(L-ch)
Pin58 of IC6301(Audio output L-ch)
→
pin16
pin36
pin2
pin30
→
E2(L2) audio output(L-ch)
21PIN CONNECTOR
(B)
→
(C)
→
(A)
MPX output(R-ch)
E1(L1) audio input(R-ch)
Pin56 of IC6301(Audio output R-ch)
→
pin15
pin37
pin1
pin31
→
E2(L2) audio output(R-ch)
21PIN CONNECTOR
(B)
→
(C)
→
(A)
(B)
(C)
(D)
E2(L2) video input
E1(L1) video input
Tuner video input
Front audio input(L-ch)
→
pin28
pin23
pin18
pin13
pin5
→
Pin31 of IC201
Y/C video input
(Tuner/Aux. input)
→ → →
(A)
(B)
(C)
(D)
E2(L2) audio input(L-ch)
E1(L1) audio input(L-ch)
MPX output(L-ch)
Front video input
→
pin33
pin36
pin16
pin11
pin39
→
Pin61 of IC6301
Audio input(L-ch)
→ → →
(A)
(B)
(C)
(D)
E2(L2) audio input(R-ch)
E1(L1) audio input(R-ch)
Tuner audio output
Front audioinput (R-ch)
→
pin34
pin37
pin15
pin10
pin40
→
Pin52 of IC6301
Audio input(R-ch)
→ → →
NO
NO
NO
YES
YES
YES
Check STBY 5V line.
Check STBY 12V line.
Check line between pins(21), (22)
of IC2501 and pins(17), (18) of
IC701.
Is voltage 5V applied to the video
section power terminal at pins(24),
(29) of IC2501?
Is voltage 12V applied to the
audio section power terminal at
pin(14) 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(21) and (22) of
IC2501?
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