Read Sharp VC-ME80HM Service Manual online
49
VC-ME80GM
VC-ME80HM
VC-ME80HM
YES
YES
NO
NO
NO
NO
YES
FLOW CHART NO.25 NICAM/IGR TROUBLESHOOTING <Except IGR only models>
NO
NO
YES
YES
YES
YES
YES
Is 5V supplied at pins(6), (16), (46)
of IC1701?
Check PC 5V line.
Is 8V supplied at pin(33) of IC1701?
Check the REG. circuit of Q1703
and Q1704.
Check STBY 10.5V line.
Check peripheral circuit of IC1701.
Replace IC1701.
Check peripheral circuit of X1701.
Is there NICAM/IGR audio signal
at pins(31), (30) of IC1701?
Is there NICAM/IGR audio signal
at emitter of Q1705, Q1706?
YES
YES
Check peripheral circuit of IC1602.
Check between pin(13) of IC1602
and pin(47) of IC1701. (Q1615)
Check serial data and clock at
pins(8) and (7) of IC1701.
Is there oscillated 18.432MHz at
pins(51), (52) of IC1701?
No NICAM/IGR sound.
Is there base band signal at
pin(47) of IC1701?
Is there base band signal at pin(13)
of IC1602?
Check line between emitter of
Q1705, Q1706 and pins(8), (13) of
IC6651.
YES
YES
YES
NO
NO
NO
Is there REC FM signal(L-ch
600mVp-p) outputted to the pin(21)
of IC6651?
Is there REC FM signal outputted to
the IC6651 pins(21) to (24)(ch-1)/
pins(21) to (22) (ch-2)?
Check the Hi-Fi CTL (L) line between
pin(29) of IC6651 and pin(20) of IC701.
Check the record current setting
resistor R6670 at pin(37) of IC6301.
Check AH-MZ harness.
Replace IC6301.
Is there "L" level at pin(29) of IC6651?
FLOW CHART NO.23 Hi-Fi SOUND MODE TROUBLESHOOTING(2)
No Hi-Fi sound recording(E-E mode is possible)
YES
YES
NO
NO
FLOW CHART NO.24 Hi-Fi SOUND MODE TROUBLESHOOTING(3)
Is there playback envelope signal
(approx. 300mVp-p) outputted to the
pins(29), (30) of IC6651?
Check the AUDIO MUTE (H) line
between pin(27) of IC6651 and
pin(26) of IC701.
Replace IC6301.
Replace IC6301.
Is there A-H.SW.P. signal at pin(27)
of IC6651?
No Hi-Fi sound playback(E-E mode is possible)
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