Y/C Circuit - Toshiba SD-K530SU Service Manual

5. Y/C CIRCUIT

(1) No Video in EE Mode,
No Video in EE Mode
Does the Video signal
appear at the IC301
Pin15?
YES
Is 5.0V applied to the
IC301Pins4, 22, 47, 60, 84?
YES
Does the Video signal
appear at the IC301
Pin29?
YES
Does the Video signal
appear at the IC501
Pin52?
YES
Does the Video signal
appear at the IC602
Pin7?
NO
Check the Tuner Pin16V
NO
Check the SW 5V, 5.3VA
Line.(Power Circuit)
NO
Is I C BUS signal applied
2
to the IC301 Pins73, 74?
YES
Check the path of the sig-
NO
nal between the IC301 Pin
29 and IC501 Pins50.
NO
Is there Vcc 5V on the
IC602 Pin6
YES
Does the Video signal appear at
the IC602 Pin1(DVD MODE)
YES
Replace the IC602.
3-11
NO
Check the System Circuit.
Check the C327.(AGC)
NO
Check the 5V.
(Power Circuit)