Hitachi VT-FX795A Service Manual page 15

Audio problem 3 (No recording Hi-Fi Audio)
RF INPUT
Check SIF signal at pin
57 of IC451.
OK
Check signal at pin 26 of IC451.
OK
Cleaning the Video Head. (See page 3-6.)
NG
Check Cylinder Assembly.
Audio problem 4 (No playback Hi-Fi Audio)
Check signal at pin 24(and pin27) of IC451.
OK
Check Audio signal at pin 80(or pin78 or pin2) of IC451.
OK
Check TU701 or A-OUT jack.
NG Check TU701.
LINE INPUT
Check Video signal at pin
69(or pin71) or pin 7
(or pin9) of IC451.
NG
Check IC451.
NG
Cleaning the Video Head. (See page 3-6.)
Check Cylinder Assembly.
NG
Check IC451.
NG Check A/V cable.
OK
NG
3-3