Service manual

3-11
5. Y/C CIRCUIT
(1) No Video in EE Mode,
No Video in EE Mode
Does the Video signal
appear at IC302
Pins1, 5?
Is there 5V at IC302 Pin6?
Check the REG 5V Line.
(Power Circuit)
Replace IC302.
Does the Video signal
appear at IC301
Pins28, 30, 32?
Is REG 5.0V applied to
IC301Pins23, 44, 45, 52, 68,
77?
Does the Video signal
appear at IC301 Pin26?
Does the Video signal
appear at IC501 Pin52?
Does the Video signal
appear at IC602 Pin7?
Check the REG 5V Line.
(Power Circuit)
Is I
2
C BUS signal applied to
IC301 Pins53, 54, 55?
Replace IC301.
Check the path of the sig-
nal between IC301 Pin 26
and IC501 Pins50, 52.
Is there 5V on the plus
terminal of C614?
Check the REG 5V Line.
(Power Circuit)
Replace IC602.
Check the System Circuit.
(Refer to ‘SYSTEM I
2
C BUS
CHECK Trouble Shooting’)
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Check the REG 5V Line.
(Power Circuit)
NO
NO
YES
YES
Check DVD Video Input
(IC802, Pin29), Tuner
Video Input (TU701 Pin24),
Line Video Input (JK801),
respectively.
NO
NO
VCR ELECTRICAL TROUBLESHOOTING GUIDE