Sanyo VHR-H803E Service Manual page 28

3. Y/C CIRCUIT
(4) When the Video signal doesn't appear on the screen in REC Mode,
Is the EE signal normal?
YES
Is 5.2VT/5.4VA applied to the
IC301 Pins 24,42,55,72,91?
YES
Does PB Mdoe operate
normally?
YES
Does the RF signal appear
at the IC301 Pin 78?
YES
Does the REC RF signal
appear at the IC301
Pins 88,89,94,95?
YES
Check the Drum &
Drum Connector
NO
Check EE Mode.
NO
Check the line of the 5.2VT/
5.4VA Line.(Power Circuit)
NO
Check PB Mode.
Is the REC 'H' signal
NO
(about 4V) applied to the
IC301 Pin 80?
Check REC Luminance
Pass & Color Pass.
NO
Check the circuit of the
IC301 Pins 85, 86.
3-15
NO
YES
YES
YES
Check the System of REC
'H'. (the IC501 Pin 47
/ the D301)
Replace the IC301.