Zenith XBV613 - DVD/VCR Combination Service Manual page 23

3. Y/C CIRCUIT
(3) When the C(Color) signal doesn't appear on the screen in PB Mode,
Is SW 5V applied to IC301
Pins23, 44, 45, 52, 68, 77?
YES
Does the Color signal
appear at IC301 Pins41,
50?
YES
Replace IC301.
NO
NO
Is the oscillation frequency
of X301 (3.58MHZ) normal?
Does the Color signal
appear at IC301 Pin48?
Replace IC301.
3-12
Check the line of the REG
5V Line. (Power Circuit)
NO
NO
YES
Replace X301.
Check C342, C341, R333.