TROUBLESHOOTING GUIDE
E-11
Yes
No
No
Yes
RECORDING MECHANISM
WORKS, BUT NO VIDEO AND
AUDIO RECORDED FROM
INPUT JACK OR TUNER
Does AUDIO signal
appear at pins 76, 78
and 80 of IC4501 ?
Check the circuit from AUDIO input
jack to IC4501 and from Tuner Pack
to IC4501.
Is there FM signal at
pin 73 of IC4501 ?
Replace IC4501.
Check CYLINDER UNIT.
Yes
NO E-E (NO VIDEO AND
AUDIO FROM TUNER)
Check Y/C BLOCK.
Yes
No
Check POWER BLOCK.
Is there AUDIO signal
at pin 15 of TU001 ?
Is there VIDEO signal at
pin 16 of TU001 ?
No
Yes
No
Do the following voltages
appear on TU001, 30V at pin
11 and 5V at pin 1,9 and 17 ?
Replace TU001.
