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3-5.
Adjustments
after
replacing
the cylinder
Purpose:
To eliminate
drift
in the relative
height with the guide rollers,
the X-value,
etc.
However,
this drift is very smal! when the cylinder has been replaced correctly.
Test
equipment/jig
gsetierulment:
State
of VCR
+ Oscilloscope
+ CH-1:
PB FM
+ Run the blank
tape
+ CH-2: SW25Hz or 30Hz
2
a
ee
ees Roe ee
ae
eee
+ Play alignment' tape
(Electrical adjustment)
(Stairsteps
section)
+Head
switching
point
+ X-value
Adjustment
points
«Guide rollers (precise
adjustment on page 3-4)
- Blank
tape
Adjustment procedure
Play the blank tape
Is there
curling
or
chee
thet
7
NOT SATISFIED
t
tn
;
A
<
Rear outpet
had
Adjust the height of the
(See next page)
guide rollers precisely,
SATISFIED
Adjust
switching
point
Adjust
X~value
Adjustment completed
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