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3. Y/C CIRCUIT
(4) When the Video signal doesn’t appear on the screen in REC Mode,
Is the EE signal normal?
Is 5.2VT/5.3VA applied to the
IC301 Pins4, 22, 47, 60, 84
Does the RF signal appear
at the IC301 Pin76?
Check EE Mode.
Check the System of REC
‘H’. (the IC501 Pin47)
Replace the IC301.
Check the line of the 5.2VT/
5.3VA Line.(Power Circuit)
Check PB Mode.
Is the REC ‘H’ signal
(about 4V) applied to the
IC301 Pin80?
Check REC Luminance
Pass & Color Pass.
Does PB Mdoe operate
normally?
Does the REC RF signal
appear at the IC301
Pins80, 90?
Check the Drum &
Drum Connector
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
YES
YES
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