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Audio problem 1 (No recording Normal Audio)
RF-INPUT
(with VT-FX340E(UK))
Change for Audio-mode(MONO) by AUDIO-
SELECT KEY of Remote Controller.
OK
Check SIF signal at pin 2 of CN701.
OK
Check Audio signal at pin 4 and 5 of CN701
or pin 4 and 50 of IC451.
OK
Check Audio signal at pin 13, pin 15 or pin 17 of IC301.
OK
Check Tape interchangeability alignment. (See page 5-5.)
OK
Cleaning the Audio Control Head. (See page 3-7.)
LINE INPUT (AV2)
(with VT-FX340E(UK))
Check Audio signal at pin 10 or pin 56 of IC451.
OK
Check Audio signal at pin 17 of IC301.
OK
Check Tape interchangeability alignment. (See page 5-5.)
OK
Cleaning the Audio Control Head. (See page 3-7.)
Audio problem 2 (No playback Normal Audio)
(RF OUTPUT/AV1)
Check Audio signal at pin 5 of IC301.
NG
Check Tape interchangeability
alignment. (See page 5-5.)
NG
Check ACE Head Assembly and service it if detective.
Check Audio signal at pin 11 of IC301 or pin 80 of IC451.
OK(with VT-MX310E(UK))
Check Audio signal at pin
(72, 74, 76) of IC451.
NG
Check IC451 and service
it if detective.
(with VT-MX310E(UK))
NG
NG
(with VT-MX310E(UK))
OK
Cleaning the Audio
OK
Control Head.
(See page 3-7.)
OK(with VT-MX310E(UK))
OK
Check TU701 or
A-OUT jack, and
service it if detective.
Check IC301 and IC451,
and service it if detective.
LINE INPUT (AV1)
(with VT-FX340E(UK))
Check Audio signal at pin 6 or 52 of IC451.
OK
Check TU701 and
service it if detective.
Check AFV CBA and
service it if detective.
NG
NG
Check IC451 and IC301, and service it if detective.
Check ACE Head Assembly and service it if detective.
NG
Check AV cable, JK102 and line between JK102 and pin
(10, 56) of IC451, and service it if detective.
NG
Check IC451 and IC301, and service it if detective.
NG
Check ACE Head Assembly and service it if detective.
(AV2)
Check Audio signal at pin 5 of IC301.
NG
Check Tape interchangeability
alignment. (See page 5-5.)
NG
Check ACE Head Assembly and service it if detective.
Check Audio signal at pin 11 of IC301 or pin 80 of IC451.
OK(with VT-MX310E(UK))
NG
Check Audio signal at pin
65 and pin 67 of IC451.
NG
Check IC451 and service
it if detective.
(with VT-MX310E(UK))
NG
Check AV cable, JK101 and
line between JK101 and pin
(6, 52) of IC451, and service
it if detective.
OK
Cleaning the Audio
OK
Control Head.
(See page 3-7.)
OK(with VT-MX310E(UK))
OK
Check A-OUT jack and
service it if detective.
Check IC301 and IC451,
and service it if detective.
NG
3-3
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