Sony WM-AF59 Service Manual

WM-AF59/BF59
SECTION 4
ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured
alcohol-moistened swab:
rubber belts
idlers
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 (3.0V) unless
otherwise noted.
Playback Head Height Adjustment
(Note on Playback Head Replacement)
tape guide
direction
(FWD)
1 [ on] t— 71
stl f ea
et 1 Shag
ans = \
RT a
Sa C}
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 @),
(By) using a mirror cassette, turn the screw M2 x 5
to eliminate the tape curl.
For example in the figure:
Co curl marked O is eliminated by cae)
clockwise the screw M2 x 5 (right).
3. Check in the REV mode by the same way as in the
FWD mode.
4-1. MECHANICAL ADJUSTMENT
Torque Measurement
j
25
to
55
g-cm
FWD
(0.35
to
0.76
oz-inch)
CQ-102C
FWD Back
Tension
REV Back
Tension
1.5 to 4.5 g-cm
(0.02 to 0.06 oz-inch)
25 to 55 g-cm
(0.35 to 0.76 oz-inch)
CQ-102RC
1.5 to 4.5 g-cm
(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)
CQ-201B
Tape Pulling Force Measurement
:
more
than
45
g
CQ403A
(more
than
1.6
02)
(more than 1.6 oz)
TEST TAPE
WS-48A | 3 kHz,0dB Tape Speed Adjustment
Dolby NRHead Azimuth

Sony WM-AF59 Specifications

General

Brand	Sony
Model	WM-AF59
Category	Cassette Player
Language	English