JVC HR-XV2EX Service Manual page 17

4. 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 5V applied to the IC301
Pins4, 22, 47, 60, 84?
YES
Does the Video signal
appear at the IC301 Pin29?
YES
Does the Video signal
appear at the IC501 Pin19?
YES
Does the Video signal
appear at the Emitter termi-
nal of the Q805?
NO
Check the 24Pin of Tuner.
NO
Check the 5.2VT, 5.3VA
Line. (Power Circuit)
NO
Is I 2 C BUS signal applied to
the IC301 Pins73, 74?
YES
Chck the path of the signal
NO
between the IC301 Pin29
and IC501 Pin17.
Does the 12VT, 5.4VA
NO
appear at the Emitter termi-
nal of the Q805.
YES
Replace the Q805.
3-11
Check the System Circuit.
NO
(Refer to 'SYSTEM I
CHECK Trouble Shooting')
Check C327. (AGC)
NO
Replace the IC301.
Check the 12VT, 5.4VA
Line. (Power Circuit)
2 C BUS
YES