3-11
4. Y/C CIRCUIT
(1) No Video in EE Mode,
No Video in EE Mode
Check the Video Input
Jack.
(Line In Jack)
Does the Video signal
appear at the IC301 Pin 38?
Is 5V applied to the IC301
Pins 16, 40, 55, 58, 75, 87?
Does the Video signal
appear at the IC301 Pin 29?
Does the Video signal
appear at the IC501 Pin 45?
Does the Video signal
appear at the Emitter
terminal of the Q701?
Check the 5V Line.
(Power Circuit)
Is I
2
C BUS signal applied to
the IC301 Pin 23, 24?
Check C316. (AGC)
Chck the path of the signal
between the IC301 Pin 29
and IC501 Pin 43.
Replace the IC301.
Does the 5V appear at
the Emitter terminal of
the Q701.
Replace the Q701.
Check the 5V Line.
(Power Circuit)
Check the System Circuit.
(Refer to ‘SYSTEM I
2
C BUS
CHECK Trouble Shooting’)
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
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