Sony Walkman WM-DD 3 User Manual

WM-DDm
PRECAUTION
SECTION 3
ADJUSTMENTS
1. Clean the following parts with a denatured-
alcohol-moistened swab:
playback head
capstan
pinch roller
2. Demagnetize the playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the
adjustments.
4. After the adjustments, apply suitable locking
compound to the parts adjusted.
5. The adjustments should be performed with the
rated power supply voltage unless otherwise
noted.
3-1. MECHANICAL ADJUSTMENT
Torque Measurement
Perform with 2.5 V DC power.
Torque
Meter reading
meter
22-46 g•cm
FWD
CQ-102C
(0.3- 0.63 oz•inch)
FF, REW
CQ-201B
More than
65 g·cm
(More than 9.04 oz•inch)
Back
CQ-102C
1- 3.5 g•cm
Tension
(0.01- 0.05 oz•inch)
Tape Pull-
CQ-403
More than
80 g•cm
ing Force
(More than
11.12oz•inch)
Pinch Roller Pressure Adjustment
- Playback Mode -
1 . Pull the spring scale in the direction shown by
the arrow.
2. Slowly return the pinch roller and read the
spring scale just when the pinch roller starts
rotating. p
S
'f' , I • 1
pect tcahon: '~:. -:._"~ __ -~
170 ± 20 g (5.3 "'6.7 oz)
-5-
Head Height Adjustment
1. Prepare an adjustment cassette as shown below.
C-120
tape cassette
Cut out hatched
portions.
2. In playback mode and viewing from the front,
adjust the head heights to eliminate tape curl
and tape twist at portions shown by the arrow.
playback head
~-A
~
T~ ~ ~~
3-578-138-01 (t = 0.1)
3-578-138-11 (t = 0.2)
Shim, head height adjustment
3. If necessary, adjust the height of the tape-guide
by turning the adjustment screw.
adjustment screw
4. Apply locking compound on adjustment screw.
Exhibit 1010, Page 004
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Sony Walkman WM-DD 3 Specifications

General

Brand	Sony
Model	Walkman WM-DD 3
Category	Cassette Player
Language	English