Sony M-101 User manual

M-101 (Panel: Silver)
Power Requirements:
Power Consumption:
Power Output:
Recording System:
Tape Speed:
Fast Winding Time:
5 W ac with Sony AC Power Adaptor
AC-31 (US, Canadian model)
7.2 Wac (50Hz) 6.8 Wac (60Hz)
with Sony AC Power Adaptor
AC-32
(E model)
150 mW (max.)
2-track l-channel monaural
2.4 cm/s
(1716 ips)
Approx. 1 minute 30 seconds
with Sony Micro cassette MC-60
Frequency Response: 200
- 7,000 Hz
Battery Life: Continuous recording hours:
Approx. 2 hours with Sony
long-life battery size-AA
Approx. 4 hours with Eveready
Heavy Duty Battery No. 1215
Approx. 7.5 hours with Eveready
Alkaline Batterv No.
E91
US Model
Canadian Model
E Model
M-101B (Panel: Black)
US Model
MICRO CASSETTE-CORDER
SPECIFICATIONS
3V dc
Battery size-AA Input:
(IEC Designation
R6). 2 pcs
Rechargeable Battery Pack BP-31 (optional)
120 V ac, 60 Hz with Sony AC Power
Adaptor AC-31 (optional) (US, Canadian model)
110, 120, 220 or 240 V ac, 50160 Hz with
Sony AC Power Adaptor AC-32 (optional)
(E model)
output:
Speaker:
Dimensions:
Weight:
Approx.
64(w) x 26 (h) x 143 (H) mm
29/h (w) x 11/16 (h) x 5l1/16 inches
not including projecting parts and controls
Approx. 350 g, 13
oz
including batteries
SONY
SERVICE MANUAL
MIC (mini jack)
Maximum sensitivity: 0.2 mV
(-72dB)
Impedance: Low-impedance
microphone
EARPHONE (mini jack)
Load impedance:
8a earphone or
more than 10 kn
4.5 cm (1 3/4 inches) dia.

7 M-101/101B
3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION
Clean the following parts with a
denatured-alcohol-
moistened swab:
Record/Playback head Pinch roller
Erase head Rubber belts
Capstan Idlers
Demagnetize the record/playback head with a
head demagnetizer.
(Do not bring the head demagnetizer close to
the erase head, and do not use a magnetized screw-
driver for adjustments).
After the adjustments, apply the locking com-
pound to the adjusted parts.
The adjustments should be performed in the order
listed in this service manual.
1. Tape Speed Adjustment
Setting:
Power source: 2.5 V dc
Procedure:
1. Mode: playback
rest rape
WS-24
13 kHz, 0 dB)
speed checker (SONY L FM-30
or digital frequency counter
EARPHONE
1) Adjust R18 for 0 % on the speed checker or
3000 Hz on the digital frequency counter.
2) Following specifications should be satisfied with
the power source from 2 V dc to 3.5 V dc.
3) Specifications:
Speed checker Digital frequency counter
+3%
- 2.5 %
2925 Hz ~ 3090 Hz
Frequency difference between beginning and
end of tape should be within 1 % (30 Hz).
Adjustment Location:
R18
-6-