Sony WM-A53 User Manual

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WM-A53/B53
SECTION 4
ADJUSTMENTS
pReCnei
ers
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4-1.
MECHANICAL
ADJUSTMENT
Meter Reading
Torque Measurement
[Mode | Torave Mew
I. Clean the following parts with a denatured
alcohol-moistened swab:
playback
head
rubber
belts
:
25
to
55
g-cm
|
|
:
(0.35
to
0.76
oz-inch)
capstan
_idlers
CQ-102C
:
pinch
roller
1.5
to
4.5
g-cm
WD
FWD Back
| Tension | (0.02 to 0.06 oz-inch)
| a | 25 to 55 g-cm
‘ (0.35 to 0.76 oz-inch)
+ CQ-102RC
°F ‘ ,
REW
2. Demagnetize the playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the
adjustments.
REV Back | 1.5 to 4.5 g-cm
Tension (0.02 to 0.06 oz-inch)
| 55 to 150 g-cm
(0.76 to 2.1 oz-inch)
55 to 150 g-cm
(0.76 to 2.1 oz-inch)
Tape Pulling Force Measurement |
FWD
more
than'45
g
ew
marae”
(more
than
1.6.02)
REV
more
than
45
g
ev
Pi
(more
than
1.6
02)
TEST TAPE
WS-48A
|
3
kHz,0
dB
Tape
Speed
Adjustment
‘ Dolby NR Head Azimuth
P-4-A063| 6.3kHz,-104B | Ginctment
F
F
4. After the adjustments, apply suitable locking |
compound to the parts adjusted. CQ-201B
5. The adjustments should be performed with the
rated power supply voltage (3.0V) unless
otherwise noted.
Playback Head Height Adjustment
(Note on Playback Head Replacement)
direction tape guide
1. Turn the screw M2 x 5 so that the ~ (BY line
of HEAD GUIDE becomes appraximately parallel
to the (A) — (A) line of TAPE GUIDE.
2. When there is a tape curl on HEAD GUIDE (),
) using a mirror cassette, turn the screw M2 x 5
to eliminate the tape curl. |
For example in the figure: 7
ee
curl
marked
O
is
eliminated
by
|
\clockwise the screw M2 x 5 (right). | :
3. Check in the REV mode by the same way as in the —
FWD mode. _ os 7 a

Sony WM-A53 Specifications

General

Brand	Sony
Model	WM-A53
Category	Cassette Player
Language	English