Sony M-740V Operating Instructions
Microcassette-corder
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Also See for M-740V:
- Operating instructions (2 pages) ,
- Operating instructions (4 pages) ,
- Service manual (21 pages)
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SONY:
MICROCASSETTE™-CORDER
-740/750
OPERATING INSTRUCTIONS
Before operating the unit, please read this manual thoroughly
and retain it for future reference.
Sony Corporation
Printed in Japan © 1987
¢ Compact size and easy operation
¢ VOR (voice operated recording) system (M-750V only)
economizes on tapes, batteries and your time.
e You can start recording directly from the playback mode. This
function is convenient to correct a previously recorded
portion.
What is VOR (voice operated recording) system?
With this system, recording starts only when sound is
picked up and stops automtically when sound is no longer
detected.
On power sources
* Operate the unit only on 3V DC.
For battery operation, use two size AA (R6) batteries.
For AC operation, use the AC power adaptor recommended
for this unit. Do not use any other type.
¢ When the internal batteries are not to be used, remove them
to avoid damage caused by battery leakage and corrosion.
On location
¢ Do not leave the unit in a location near heat sources, or in a
place subject to direct sunlight, excessive dust, or mechanical
shock.
* Since a strong magnet is used for the speaker, keep personal
credit cards using magnetic coding or spring-wound watches
away from the unit to prevent possible damage from the
magnet.
On operation
¢lf the unit has not been used for a long time, set it in the
playback mode to warm
it up for a few minutes before
inserting a cassette.
© Should any solid object or liquid fall into the unit, remove the
batteries or disconnect the AC power adaptor, and have the
unit checked by qualified personnel before operating it any
further.
¢ Use only the (wicrocisseTre)" with this unit.
* Two tape speeds can be selected for recording with the TAPE
SPEED
selector: 2.4cm or 1.2cm. Match the playback speed
to the recording speed.
Select the 2.4cm tape speed for recording, if you play back
the recorded tape with another unit. Otherwise, the sound
quality may be changed.
{f you have any question or problem concerning your unit that
is Not covered in this manual, please consult the nearest Sony
dealer.
MIC (microphone) (PLUG IN POWER) jack
(M-750V only)
EAR (earphone) jack
Cassette holder
TAPE SPEED selector (left side) ——»
TAPE COUNTER (M-750V only)
DC IN 3V (external power ————--—#-
input) jack (left side)
Battery compartment (rear) ——————-p>-
Speaker
The illustration of M-750V
|
ie:
Record/playback head
Cleaning the head
Capstan
head
Pinch roller
HOG:
Trouble
Cause and/or remedy
Cassette cannot be inserted.
* Cassette is inserted improperly. See
"CASSETTE INSERTION".
* The ¥ button is depressed.
The @ button cannot be
depressed.
¢ No cassette in the cassete holder.
* The cassette inserted has had the tabs
removed. See "CASSETTE INSERTION".
Should any problem persist after you have made these checks, consult your nearest Sony service facility.
| Weak or distorted sound.
| Sound drop-outs, loss of high
| frequencies, or excessive noise.
The @ or W button cannot be
* The tape is completely rewound towards
locked.
the arrow direction on the cassette holder.
¢ After the automatic shut-off, the PAUSE
opposite direction of the arrow.
1 Tape speed is excessively fast or | * Improper setting of the TAPE SPEED
| slow while playing back.
selector.
switch is on. Slide the PAUSE switch in the |:
The @ or ¥ button is locked, but | * Slide the PAUSE switch in the opposite
playback/recording does not
direction of the arrow.
start.
* Incorrect polarity of batteries.
© Weak batteries.
BATT (battery) indicator
VOLUME control
Built-in microphone
@ (record) button
CUE ¥ (fast forward)/IREVIEW 4 (rewind) control
Vv (playback) button
g/& (stop/eject) button
PAUSE switch
VOR (voice operated recording) switch (M-750V only)
Handstrap catch
|
Handstrap
(supplied with M-750V only)
Cleaning the casing
or a mild detergent solution. Do not use alcohol, benzine or
thinner as they may mar the finish.
Cause and/or remedy
¢ The earphone is plugged in.
¢ The VOLUME
control is turned down com-
pletely.
No sound from the speaker.
© Weak batteries.
¢ Dirty heads. See "MAINTENANCE".
Recording cannot be made or is_ | ¢ Weak batteries.
unsatisfactory.
Dirty record/playback head.
See "MAINTENANCE".
¢ Improper setting of the VOR switch (M-750V
only). Set it to "H" or "OFF".
|
Unsatisfactory erasing.
Dirty erase head. See "MAINTENANCE".
Tape
(MICROCASSETTE)™ (normal position type)
Recording system
2-+track 1-channel monaural
Speaker
Approx. 4cm (1% inches) dia.
Tape speed
2.4cmis (15/16 ips), 1.2cm/s (15/32 ips)
Frequency response
250—4,000Hz {at 2.4cm position)
Input (M-750V only)
Microphone jack (minijack) (PLUG IN POWER)
sensitivity 0.3mV for 3kilohm or lower impedance
microphone
Output
Earphone jack (minijack)
for 8-300 ohm earphone
Power output
150 mW (at 10% harmonic distortion)
Battery life (recording)
Sony SUM-3 (NS): Approx. 6 hours
Sony AM3 (N): Approx. 18 hours
3V DC, two size AA (R6) batteries
DC IN 3V jack accepts:
* Sony AC-D2M AC power adaptor (optional) for
use on 120V AC, 60Hz
¢ Sony DCC-70 car battery cord (optional) for use
on 12V car battery
Approx. 66.5* 124.2x29.7 mm
(w/hid)
(2%, 5x 13/, inches)
incl. projecting parts and controis
Power requirement
Dimensions
Weight
Approx. 190g (6.802) incl. batteries
Accessory supplied (M-750V only)
Handstrap (1)
Design and specifications subject to change without notice.
OPTIONAL ACCESSORIES
Microcassette
MC-30, MC-60, 3MC-60
Earphone
ME-81, ME-L82
Connecting cord
RK-64A (miniplug to miniplug with attenuator)
Electret condenser microphone (for M-750V)
ECM-144, etc.
AC power adaptor
AC-D2M
Car battery cord
DCC-70
Note: Use only the recommended AC power adaptor or car battery cord
manufactured
by Sony. Polarity of the plugs of other manufacturers
may be different.
Polarity of the Sony plug
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