NO Is there picture signal inputted in the pins(28) and (31) sCheck line between rear video input terminal and pin(31) of IC201. Line output : Is there picture Check line between Q708 and IC2501. IC201? See FLOW CHART NO.28 DECODER TROUBLESHOOTING. NO signal inputted at pin (7) of YES YES
sCheck line front video input terminal and pin(28) of IC201. IC2501
Check peripheral circuit of Is there a picture signal outputted at pins(25), (26) of IC2501. IC2501?
NO
NO there a picture signal Is the supply voltage of 5V outputted in the pin(52) (Y-Vcc) fed to pin(12) of Check PC 5V line. IC201? Check the line between IC2501
NO YES
periphery.
NO Y/C clock signal applied to (62) of IC201 and pins(56),
YES
peripheral and output terminal YES
Is there Y/C serial data and Check line between pins(63),
pins(63) and (62) IC201? (57) of IC701.
YES
Replace IC201.
43
Check PC 5V line.
Is there a picture signal Check the line between pin (52) of IC201 and Q201 Q201?
NO outputted in the emitter of
YES (VC-MH76/761SVM)
Is there a picture signal inputted in the pin(49) of IC701? NO
Check the line between pin (52) of IC201 and pin (49) of IC701
YES
there a picture signal Is the supply voltage of 5V outputted in the pin(47) of (OSD Vcc) fed to pin (51) of IC701? NO
YES
Is there a picture signal outputted in the emitter of Q708?
