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TC-D3/WM-D3
SECTION
3
ADJUSTMENTS
3-1.
MECHANICAL ADJUSTMENTS AND
MEASUREMENT
PRECAUTION
. Clean
the
following
parts
with
a
danatured-
alcohol-moistened swab:
record/play back head
pinch roller
erase head
rubber belts
capstan
. Demagnetize
the
record/playback
head
with
a
head demagnetizer.
(Do not bring the head de-
magnetizer close to the erase head.)
. Do
not
use
a
magnetized
screwdriver
for
the
adjustments.
. After
the
adjustments,
apply
suitable
locking
compound to the parts adjusted.
. The
adjustments
should
be performed
with the
rated
power
supply
voltage
unless
otherwise
noted.
Perform with 2.5 V DC power
Torque Measurement
Torque
Meter Reading
Torque Meter
22 — 46 g-cm
CO-102C
Fast Forward
More than 65 g-cm
and Rewind
(More than 0.89 oz-inch)
eOe0re
;
1—3g-cm
Each Temson||
(O.014. 10.04 orinehye |)
Tape Tension Measuremerit
Meter Reading
CQ-403A
100 — 150 g (3,53 — 5.29 oz)
Pinch Roller Pressure Measurement
Procedure:
— playback mode --
1. Pull the spring scale in the direction of the arrow.
2. Slowly return the pinch roller and read the spring
scale just when
the pinch roller starts to rotate.
Specifications:
150 + 20g
Head Height Adjustment
Procedure:
1. Prepare
an
adjustment
cassette
as shown
below.
Cut out hatched
tape cassette
portions.
2. In
record
mode
and
viewing
from
the
front,
adjust
the head
heights
to eliminate
tape
curl
and tape twist at arrowed portions.
erase head
record/playback
head
3-578-138-0171 (t=0.1)
3-578-138-1171 (t=0.2)
Shim, head height adjustment
3. If necessary,
adjust
the height
of the erase
head
by turning the adjustment screw.
adjustment screw
4. Apply
locking
compound
on
adjustment
screw.
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