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 48?
Is 5V applied to the IC301
Pins 18, 24, 42, 55, 72, 91?
Does the Video signal
appear at the IC301 Pin 65?
Does the Video signal
appear at the IC501 Pin 19?
Does the Video signal
appear at the Emitter termi-
nal of the Q307, Q308?
Check the 5.2VT, 5.4VA
Line. (Power Circuit)
Is I
2
C BUS signal applied to
the IC301 Pins 68, 69?
Check C316. (AGC)
Chck the path of the signal
between the IC301 Pin 5
and IC501 Pin 17.
Replace the IC301.
Does the 12VT, 5.4VA
appear at the Emitter termi-
nal of the Q307, Q308.
Replace the Q307, Q308.
Check the 12VT, 5.4VA
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
3-12
Summary of Contents for VHR-H803E
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