Sony WALKMAN WM-F31 User Manual

| WM-F31 /F41/F41SS
SECTION 2
ADJUSTMENTS
2.1 MECHANICAL ADJUSTMENTS
PRECAUTION
Clean the following parts with a denatured-
alcohol-moistened swab:
playback head pinch roller
capstan
rubber belts
Demagnetize the playback head with a head
demagnetizer.
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.
A NE nh et Rt A UT LD NL CLL QLD RQ LE RA RC Rt RR TE a UY at ll dt wd
2-2. ELECTRICAL ADJUSTMENTS
CASSETTE Section
Tape Speed Adjustment
Setting:
VOL control: mechanical mid
Procedure:
Mode: playback
Function: Tape
Specifications:
Digital frequency counter
2,985 — 3,015 Hz
Frequency difference between beginning and
end tape should be within + 1% (30 Hz). Adjust RV601
Playback Head Azimuth Adjustment
Procedure:
1. Mode: playback
Function: tape
test tape
P-4-A063
(6.3 kHz, —10 dB)
HEADPHONES
Adjustment Location:
RV301
TAPE speed
adjustment screw.
azimatch adjustment screw.
|
Torque Measurement
22-45g-cm |
Porward :
oer (0:32-0:630e4nen).| 2 197"
§5-150g°cm
Fast F d :
ae NEES) (0.77-2.10z+inch) Epon
55-150g+cm
Rewind
j
(0.77-2.1o0z+inch)
CQ-201B
0.5—2 g-cm
(0.007-0.03 oz-inchy | ©2102
Tape Tension Measurement
CQ403A more than 120 g (4.3 oz)
test tape
WS-48A
{3 kHz, 0 dB)
HEADPHONES
2. Turn the adjustment screw for the maximum
output levels. If these levels do not match, turn
the adjustment screw until both of output
levels match together within 2 dB.
L-CH
output
peak level
R-CH
eak
Screw se
position
L-CH R-CH
peak peak
frequency
counter
within
2dB
—-e angle
— Continued 0 page 4 —

Sony WALKMAN WM-F31 Specifications

General

Brand	Sony
Model	WALKMAN WM-F31
Category	Cassette Player
Language	English