Sony MICROCASSETTE DICTATOR BM-575 Service Manual

SERVICE MANUAL
US Model
BM-575/577
AEP Model
BM-577
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BM-577.
SPECIFICATIONS
Tape
GarcngcasseTT®" (normal position type)
Recording system
BM-577: 4-track 2-channel monaural
BM-375: 2-track 1-channel monaural
Speaker
Approx. 2.8 cm (14in.) dia.
Tape speed
2.4 cm/s ('%e ips), 1.2 cm/s (rips)
Frequency response
BM-577: 250 to 4,000 Hz (at 2.4 cm/s)
BM-575: 300 to 3,500 Hz (at 2.4 cm/s)
Input
Microphone jack (minijack) sensitivity 0.2 mV for low impedance
microphone
Output
Earphone jack (minijack) for 8 - 300 ohms earphone
Power output
150 mW (at 10 % harmonic distortion)
Battery life -
Continuous recording hours with the built-in microphone:
Approx. 9 hours (average) with alkaline batteries.
Approx. 2 hours with a rechargeable battery after charged for 5 hours.
Power requirements
3V DC
* Two size AAA (R03) batteries (not supplied)
*Sony BP-43 rechageable battery pack (not supplied)
DC IN 3 V jack accepts:
*Sony AC-E30HG AC power adaptor (not supplied) for use on 120 V
AC, 60 Hz (US model) or 220—-230V AC, 50/60Hz (AEP model)
*Sony DCC-E130L car battery cord (not supplied) for use on 12 V ca
battery.
Dimensions (w/h/d) (incl. projecting parts and controls)
Approx. 60 x 122x 23.4 mm (w/h/d)
(2% x4 %x Ke in.)
Mass
Approx. 155 g (5.5 02.)
Approx. 185 g (6.5 oz.) (incl. batteries and cassette)
Supplied accessory
Carrying case (1) (BM-577 only)
Design and specifications are subject to change without notice.
Use only standard Microcassettes with this unit.
Non-standard microcassettes cannot be used because their "L"
dimension (see illustration) is different.
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
Only standard
Microcassettes have
a small indentation
on side A.
Non-standard
Standard
About
Smm
Use the AC-E30HG AC power adaptor (not supplied). Connect the
adaptor to the DC IN 3V jack and to a wall outlet. Do not use any
other AC power adaptor.
NOTES ON CHIP COMPONENT REPLACEMENT
© Never reuse a disconnected chip component.
® Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Polarity of the plug
MICROCASSETTE" DICTATOR
SONY.