Tuner/If Circuit - Zenith ZRY-316 Manual

VCR ELECTRICAL TROUBLESHOOTING GUIDE

7. Tuner/IF CIRCUIT

(A)
No Video on TV screen.
Is Tuner mode selected?
Is "TV" displayed on FLD displayed
Is +5V applied to TU701 Pin 3?
Is "High" applied to TU701 Pin 4?
Does the Video signal appear at Pin 16
of TU701?
Replace TU701
YES
YES
NO
YES
YES
YES
NO
changer to Tuner mode using remocon.
YES
Set TV/VCR SW to VCR using remocon.
NO
NO
Check the voltage at Pin26 of IC501.
("H" for tuner mode)
NO
Check the path form Pin23 of IC601
to the Pin 5 of TU701.
3-18
Check 5V Line.