Read Sharp VC-M315HM (serv.man7) Service Manual online
45
VC-M305HM/LM
VC-M315HM/LM
FLOW CHART NO.18 E-E MODE TROUBLESHOOTING
No picture E-E signal.
NO
NO
NO
NO
NO
YES
YES
YES
YES
Is there picture signal inputted
in the pin (31) of IC201?
in the pin (31) of IC201?
Check line between rear video input terminal and pin (31) of IC201.
Is the supply voltage of 5V
(Y-Vcc) fed to pin(12) of
IC201?
(Y-Vcc) fed to pin(12) of
IC201?
Check PC 5V line.
YES
Is there a picture signal
outputted in the emitter of
Q201?
outputted in the emitter of
Q201?
NO
Check the line between pin
(52) of IC201 and Q201
(52) of IC201 and Q201
Is there Y/C serial data and
Y/C clock signal applied to
pins(63) and (62) of IC201?
Y/C clock signal applied to
pins(63) and (62) of IC201?
Check line between pins(63),
(62) of IC201 and pins(84),
(85) of IC701.
(62) of IC201 and pins(84),
(85) of IC701.
Replace IC201.
Is there a picture signal
inputted in the pin(49) of
IC701?
inputted in the pin(49) of
IC701?
YES
NO
NO
Check peripheral circuit of
Q251.
Q251.
YES
Is there a picture signal
outputted in the pin(47) of
IC701?
outputted in the pin(47) of
IC701?
Is there a picture signal
outputted in the pin(52) of
IC201?
outputted in the pin(52) of
IC201?
Is there a picture signal
outputted in the emitter of
Q251?
outputted in the emitter of
Q251?
Check the line between pin
(52) of IC201 and pin (49)
of IC701
(52) of IC201 and pin (49)
of IC701
Is the supply voltage of 5V
(OSD Vcc) fed to pin (51)
of IC701?
(OSD Vcc) fed to pin (51)
of IC701?
NO
Check PC 5V line.
YES
Is there a picture signal
outputted at pin(25) ofIC2501?
outputted at pin(25) ofIC2501?
NO
Check peripheral circuit of
IC2501.
IC2501.
YES
Check the line between IC2501
peripheral and output terminal
periphery.
peripheral and output terminal
periphery.
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