Recording Mechanism Works, But No Video Recorded From Input Jack Or Tuner - JVC HR-J3009UM Service Manual

RECORDING MECHANISM WORKS,
BUT NO VIDEO RECORDED FROM
INPUT JACK OR TUNER
Does VIDEO signal
appear at pins 30 and
32 of IC4001?
Does VIDEO signal appear
at pin 26 of IC4001?
Does FM signal appear
at pin 59 to IC4001?
Does the FM current
appear at pin 59 of IC4001
during the REC?
Check CYLINDER UNIT and
IC4001 circuit.
1-42
TROUBLESHOOTING GUIDE
No
Yes
No
Yes
No
Yes
No
Yes
Is the voltage at pin
56 of IC1001 5V?
Yes
Check the circuit from
VIDEO input jack to IC4001,
from Tuner Pack to IC4001.
No
Check IC1001.
Check IC4001.
Check IC4001 and check
the peripheral circuit.