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WM-DDIII
SECTION 3
PRECAUHON
ADJUSTMENTS
1.
Clean the following parts with a denatured-
alcohol-moistened swab:
playback hcad
pinch roller
capstan
Head Height Adjustment
1.
Prepare an adjustment cassette as shown below.
2.
Demagnctize the playback head with a head
demagnetizer.
3.
Do not use a magnetized screwdriver for the
adjustments.
7/////.
5/'///.
4.
After the adjustments, apply suitable locking
compound to the parts adjusted.
C-120
Cut out hatched
tape cassette
D0"/OHS.
5.
The adjustments should be performed with the
rated power supply voltage unless otherwise
noted_
In playback mode and viewing from the front,
adjust the head heights to eliminate tape curl
3_1_
MECHANICAL ADJUSTMENT
and tape twist at portions shown by the arrow.
Torque Measurement
Perform with 2.5 V DC power.
Meter reading
raps guide
fl -22 — 46 g~cm
CQ"°2C
(0.3—0.63oz-inch)
playback head
More than 65 g-cm
CQ'201B
(More than 9.04 oz-inch)
Back
1 — 3.5 g-cm
Tension
(0.01 - 0.05 oz-inch)
Tape Pun.
More than 80 g-cr_n
jug Force
(More titan ll.l2 oz-mch)
3-578-138-01 (r = 0.1)
3-578-138-17 (t = 0.2}
Shim, head height adjustment
if necessary, adjust the height of the tape-guide
by turning the adjustment screw.
adjustment screw
Pinch Roller Pressure Adjustment
_ Hayback Mode _.
Apply locking compound on adjustment screw.
1.
Pull the spring scale in the direction shown by
the arrow.
Slowly return the pinch roller and read the
spring scale just when the pinch roller starts
rotating.
Specification:
170 1' 70g (5.3 '''6.7 oz)
Page 4 of 14
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