Sanyo VHR-M261EV Service Manual page 28

3. Y/C CIRCUIT
(3) When the C(Color) signal doesn't appear on the screen in PB Mode,
Is 5V applied to the IC301
Pins 16, 40, 55, 58, 87?
YES
Is the Color Rotary signal
applied to the IC301
Pin 10?
YES
Is Color Rotary "H"
about 1.6V?
YES
Does the Color signal
appear at the IC301
Pin 71 ?
YES
Replace the IC301.
NO
NO
NO
NO
Does the X301(4.43MHZ)
or X302(3.58MHZ) oscillate?
Does the Color signal
appear at the IC301 Pin 61?
Check the circuit of the
IC301 35, 62.
3-13
Check the line of the 5.2V
Line. (Power Circuit)
Check the Color Rotary
Circuit. (IC501 pin 28 )
Check the Color Rotary
level.
(Check the R303)
NO
NO
Check the Color Pass.
(Check the Q304)
YES
Replace the X301 or
the X302.
Replace the IC301.