Read Sharp VC-MH834 (serv.man3) Service Manual online
47
VC-M314HM
VC-MH834HM
VC-MH834HM
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 pins(28),(30) and (31)
of IC201?
Check line between rear video input terminal and pin(30) and
Check line front video input terminal and pin(28) of IC201.
Is the supply voltage of 5V
(Y
-Vcc) fed to pin(12) of
IC201?
Check PC 5V line.
YES
Is there a picture signal
outputted in the emitter of
Q201?
NO
Check the line between pin
(52) of IC201 and Q201
Is there
Y/C serial data and
Y/C clock signal applied to
pins(63) and (62) of IC201?
Check line between pins(63),
(62) of IC201 and pins(56),
(57) of IC701.
Replace IC201.
Is there a picture signal
inputted in the pin(49) of
IC701?
YES
NO
Check peripheral circuit of
Q708.
YES
Is there a picture signal
outputted in the pin(47) of
IC701?
Is there a picture signal
outputted in the pin(52) of
IC201?
See FLOW CHAR
T
NO.28 DECODER
TROUBLESHOOTING.
Is there a picture signal
outputted in the emitter of
Q708?
Check the line between pin
(52) of IC201 and pin (49)
of IC701
Is the supply voltage of 5V
(OSD Vcc) fed to pin (51)
of IC701?
NO
Check PC 5V line.
YES
Line output : Is there picture
signal inputted at pin (7) of
IC2501
NO
YES
Is there a picture signal
outputted at pins(25), (26) of
IC2501?
Check line between Q708 and IC2501.
NO
Check peripheral circuit of
IC2501.
YES
Check the line between IC2501
peripheral and output terminal
periphery.
(31) of IC201.
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