Read Sharp VC-M315HM (serv.man7) Service Manual online
48
VC-M305HM/LM
VC-M315HM/LM
FLOW CHART NO.22 LINEAR SOUND MODE TROUBLESHOOTING(2)
No linear sound recording (E-E mode is possible)
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Replace IC201.
Check M 12V line.
Check peripheral circuits of T601.
Check the MH-AA harness and A/C
head.
head.
Is there signal (Bias + Audio sig)
at pin (6) of T601?
at pin (6) of T601?
Check the AUDIO MUTE (H) line
between pin (99) of IC201 and pin
(81) of IC701.
between pin (99) of IC201 and pin
(81) of IC701.
Is "L" level applied at pin(99) of
IC201?
IC201?
Is there signal at pin (4) of IC201?
Is the supply voltage of 12V fed to
pin (2) of T601?
pin (2) of T601?
Is there signal (Bias) at pin (5) of T601?
Check the Bias oscillation circuit (T601,
Q602,Q603) and A-ERASE CTL line.
Q602,Q603) and A-ERASE CTL line.
Is there audio signal inputted at input
terminal as shown in table?
terminal as shown in table?
Decoder or aux signal input terminal.
Pin (8) of IC201
Pin (8) of IC201
Is there audio signal outputted at pin (11)
of IC201?
of IC201?
Does the trap circuit operate normally?
Check line ranging from SCART input
terminal.
terminal.
Check PC 5V lines.
Is there "L" level at pin(99) of IC201?
Check AUDIO MUTE (H) line between pin
(99) of IC201 and pin (81) of IC701.
(99) of IC201 and pin (81) of IC701.
Check the trap circuit. (Q601, Q613).
YES
YES
YES
NO
No E-E sound
FLOW CHART NO.21 LINEAR SOUND MODE TROUBLESHOOTING(1)
Is the supply voltage of 5V fed to pin (96)
of IC201?
of IC201?
YES
NO
NO
NO
YES
NO
To Output Terminal
Check line between Q601, Q602 of
IC 201 and Audio Output Terminal.
IC 201 and Audio Output Terminal.
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