Specifications; Maintenance - Sony BM-850D Operating Instructions Manual

Specifications

Tape
y (normal position type)
Recording system
4-track 2-channel monaural
(L channel for electronic index signals, R channel for
sound signals)
Tape speed
15
2.4 cm/s ( ⁄ in./s), 1.2 cm/s (
16
Fast winding time
Approx. 1 min. 50 sec. (2.4 cm/s) with Sony
microcassette MC-60BM
Frequency response
200 – 4,000 Hz (at 1.2 cm/s)
200 – 6,000 Hz (at 2.4 cm/s)
Speaker
1
Approx. 5.7 cm (2 ⁄ inches) dia.
4
Power output
350 mW (at 10% distortion)
Input
TELEPHONE PICKUP (minijack)
Sensitivity 0.2 mV
Input impedance 10 kilohms
Output
EARPHONE (minijack)
for 8 – 300-ohm earphones
CONTROL UNIT connector
for hand control unit or foot control unit
Power requirements
9 V DC
DC IN 9 V jack accepts the supplied AC power
adaptor for use on 120 V AC, 60 Hz
Power consumption
14 W (with the supplied AC power adaptor)
Dimensions
Approx. 200 x 70.5 x 245 mm (w/h/d) (7
inches)
including projecting parts and controls
Mass
Approx. 1.2 kg (2 lb 11 oz)
Accessories supplied
AC power adaptor (1)
Hand control unit (1, BM-850D only)
Cradle for the hand control unit (1, BM-850D only)
Foot control unit (1, BM-850T only)
Earphone (1, BM-850T only)
Design and specifications are subject to change without
notice.
Optional accessories
Hand control unit HU-80
Foot control unit FS-85
Earphone DE-45
Headphones MDR-U10M
Telephone recording adaptor TL-4
Telephone pickup TP-15
Message coupler TL-2
Cleaning kit KK-31
Your dealer may not handle some of the above listed
optional accessories. Please ask the dealer for detailed
information about the optional accessories.
22 Additional Information

Maintenance

15
⁄ in./s)
32
Cleaning the heads
To produce optimum sound, clean the tape heads
after every 10 hours of use.
First, disconnect the AC power adaptor. Press EJECT
to open the cassette compartment lid. Moisten a
cotton swab or a soft cloth with alcohol, and wipe
7 7 3
⁄ x 2 ⁄ x 9 ⁄
8 8 4
the parts shown on the left.
Cleaning the cabinet
Clean the cabinet with a soft cloth slightly moistened
with a mild detergent solution. Never use strong
solvents, such as thinner or benzine, since they may
damage the finish.
Erase head
Capstan
Record/playback head
Pinch roller