FLOW CHART NO.
CAPSTAN SERVO TROUBLESHOOTING
I
Capstan servo does not function.
I
0
A
Only
mode inoperative.
Are
and /or
Only
mode inoperative.
0
B
mode inoperative ?
YES
Is there
oscillation at
and
of
I
YES
Is
at pin
of
MC connector ?
YES
I
Check
and
Check
pins
and
of
and all the way
up to the
line.
I
.
Check the capstan
signal line between EC
connector and
(through
NO
Is there
Does there appear the
r
capstan
signal at
YES
signal output at pin
pin
of
?
of
?
YES
Is there capstan
control signal at pin
N O
Replace
of
?
I
I
Does
signal
appear at pins
and
of
?
,
Does
amplifier circuit
of
(pins
to
operate normally ?
(Does the noise appear
at pin
when touch
by hand
YES
Are pins(S),
and
of
normal ?
Replace
Check the composite
sync. signal line
between pin
of
and
up
to pin
of
Replace
I
YES
Is pin
of
normal ?
Replace
I
Is the harness
normal ?
I
NO
Replace the harness
I
Check
YES
Does the A/C head
operate normally ?
I
N O
Replace
head.
I
Check
I
YES
Adjust the height of the
head.
In case of NO GOOD
Replace the capstan
motor.
I
-
-
Summary of Contents for VT-3428X
Page 78: ...m 3428X VT 51 28X IF Pack Unit RiWOOl7CEZZ 1 4 11 l e i t 1 I 2 I 3 I 4 I 5 I 6 1 78 ...
Page 82: ...VT 3428X VT 5128X I AWIO m I Au 10 f X I 7 I 8 I 9 I 10 I 11 I 12 I 82 ...
Page 90: ...VT 3428X VT 51 28X I t 7 I 8 I 9 I 10 I 11 I 12 I ...
Page 94: ...VT 3428X W 5128X 3 7 I 8 I 9 I 10 I 11 I 12 I 94 ...
Page 96: ...VT 3428X VT 51 28X TO Y C AUDIO CIRCUIT NCR 21 I I I I 7 I 8 I 9 I 10 I 11 I 12 I 96 ...
Page 100: ...m 3428X VT 51 28X Wiring Side f r 7 I 8 I 9 I 10 I 11 I 12 1 100 ...
Page 102: ...VT 3428X VT 51 28X I 7 I 8 I 9 I 10 I 11 102 1 12 I ...
Page 104: ...VT 3428X I m 5128X 1 7 I 8 I 9 I 10 I 11 I 12 I ...
Page 123: ...MECHANISM CHASSIS PARTS G F E I i 1 I 2 I 3 I 4 I 5 I 6 I 123 ...
Page 125: ...CASSETTE HOUSING CONTROL PARTS i T 3428X VT 51 28X 1 I 2 I 3 I 4 I 5 I 6 I 125 ...
Page 127: ...VT 3428X W 51 28X MODIEL VT 3428X CABINET AND MECHANICAL PARTS 1 I 2 I 3 I 4 I 5 I 6 127 ...
Page 128: ...W 3428X VT 51 28X I IO 9 0 3 7 128 ...
Page 130: ...VT 3428X VT 5128X I 0 I 0 ...
Page 132: ...MODELS VT 3428X AND VT 51 28X CABINET AND MECHANICAL PARTS I i 1 I 2 I 3 I 4 I 5 I 6 I 132 ...
Page 136: ...S H A R P TQ0023 S Printed in Japan 0 w s MW KD ...
