Read Sharp VC-M522HM (serv.man8) Service Manual online
43
VC-M522HM
VC-MH722HM
VC-MH732HM
VC-MH722HM
VC-MH732HM
Is there picture signal inputted
at pins(28) and (31) of IC201?
Is there picture signal outputted
at pin(52) of IC201?
*Check line between DECODER block and pin(31) of IC201.
See FLOW CHART NO.23 DECODER TROUBLESHOOTING.
*Check line between front video input terminal and pin(28) of IC201.
Check PC 5V line.
FLOW CHART NO.18 E-E MODE TROUBLESHOOTING
No picture E-E signal.
Is there picture signal outputted
at emitter of Q211?
Is there picture signal inputted
at pin(49) of IC701?
Is there picture signal outputted
at pin(47) of IC701?
Is there picture signal outputted
at emitter of Q709?
Is there picture signal outputted
at emitter of Q708?
(1)RF output : Is there picture
signal inputted at RF video in-
put terminal of tuner?
(2)Line output : Is there picture
signal inputted at pin(19) of
IC2501?
Is there picture signal outputted
at pins(20),(23) of IC2501?
Check the line between IC2501
peripheral and output terminal
periphery.
Is the supply voltage of 5V(Y-
Vcc) fed to pin(12) of IC201?
Is there Y/C serial data and
Y/C clock signal applied to pins
(63) and (62) of IC201?
Replace IC201.
Check line between pin(52) of
IC201 and Q211.
Check line between Sync tip
clamp circuit, and pin(49) of
IC701?
Is the supply voltage of 5V
(OSD Vcc) fed to pin(51) of
IC701?
Check peripheral circuit of
Q709.
Check line between Q709 and
Q708.
RF output : Check the line between Q708 peripheral and RF
video input terminal of tuner(TU1551) periphery.
Check line between Q708 and IC2501.
Check peripheral circuit of
IC2501.
Check line between pins
(63),(62) of IC201, and pins
(56),(57) of IC701.
Check PC 5V line.
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
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