Read Sharp VC-S2000 (serv.man2) Service Manual online
48
VC-S2000HM
FLOW CHART NO.25 LINEAR SOUND MODE TROUBLESHOOTING (2)
No linear sound playback(E-E mode is possible)
Is there signal at pin(100) of IC201?
Are the MH-AA harness and the PB AMP
peripheral parts normal?
YES
YES
YES
YES
YES
NO
Is there "L" level at pin(99) of IC201?
Check the AUDIO MUTE (H) line between pin
(99) of IC201 and pin(21) of IC701.
YES
NO
Is there audio signal inputted at pin
(54) of IC6301?
Check line between pin(11) of IC201 and pin
(54) of IC6301.
NO
Is there signal at pin(11) of IC201?
Replace IC201.
YES
NO
NO
Clean A/C head.
Readjust azimuth
Is the azimuth hight of A/C head properly
adjusted?
Replace A/C head.
Replace IC201.
YES
YES
NO
NO
NO
NO
YES
FLOW CHART NO.26 NICAM/IGR TROUBLESHOOTING
NO
NO
YES
YES
YES
YES
YES
Is 5V supplied at pins(11),(19),(1) of
IC1701?
Check PC 5V line.
Is 8V supplied at pin(33) of IC1701?
Check the REG. circuit of D9905.
Check PC MOTOR 12V line.
Check peripheral circuit of IC1701.
Replace IC1701.
Check peripheral circuit of X1701.
Is there a NICAM/IGR audio signal
at pins(31), (30) of IC1701?
Is there a NICAM/IGR audio signal
at emitter of Q1705, Q1706?
YES
YES
Check peripheral circuit of TU1401.
Check between SIF OUT of TU1401
and pin(2) of IC1701.
Check serial data and clock at
pin(12) and (13) of IC1701.
Is there oscillated 18.432MHz at
pins(5), (6) of IC1701?
No NICAM/IGR sound.
Is there a base band signal at
pin(2) of IC1701?
Is there a base band signal at SIF
out of TU1401?
Check line between emitter of
Q1705, Q1706 and pins(52), (61)
of IC6301.
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