Sanyo MR-110 - User Manual

ANQBS
Portable AC/DC Tape Recorder
movEL fA R-1 10
SERVICE MANUAL
SANYO ELECTRIC CO., LTD.
INTERNATIONAL DIVISION : SANYO ELECTRIC TRADING CO., LTD.
OSAKA, JAPAN
SPECIFICATIONS
“ransistor complements --+--+--- 2SB303C Ist amplification stage
2SB186 2nd amplification stage
2SB186 3rd amplification stage
2SB186 4th amplification stage
2S8B272 2 Output stage
2SB187 Oscillator for recording bias
2SB217 Voltage regulator
Other elements used --+-+++++++- 18188 x2 (Diode) For level meter &
Automatic level control
SDT-06 x1 (Thermistor) For temperature
compensation
Automatic level
control
SV-30x2 (Diode)
RD-9AX1 (Zener diode)
Recording system AC biasing, double track
Erasng SYSEEM cee iece eee es eee er rete nee ete ereere nee eren neta ernest en etees DC erasing
DISASSEMBLY INSTRUCTIONS
To remove the amplifier and mechanism from the cabinet.----
1. Rotate the pinch roller fixing screw in anti-clockwise direction
and remove. Then pull the pinch roller upward and remove.
Pull the head cover and take it out.
2. Invert the tape recorder and remove four (+) screws by
rotating them anti-clockwise. Then remove the back lid.
3. Remove all 6 (+) screws coated with red paint by turning them
anti-clockwise.
4, The amplifier and mechanism can now be taken out of the
cabinet.
HOW TO ADJUST THE MECHANISM
When the tape recorder fails io respond to the movement of
controls; such as insufficient functioning of rewinding or forwarding,
slackening of recording tape when the control is moved from ‘stop’
to ‘playback’, or excessive tension is applied to tape at every
function----+- make the following adjustments.
Undistored, maximum output powers sss-sssrreesereee terres Undistorted 0.8W
Maximum 1 W
Power requirement::+:+<++--+-++- 9-volt DC (D-size flashlight battery x6)
110-117 & 220-240V, AC 50 & 60%
Tape speed and Recording time(with 5 inches reel)
1-7 in (4.75cm)/sec 2 hours
3-34 in (9.5 cm)/sec 1 hour
Tape reel ciccecssscsrerssreeseeteeseeneneeeneeeceatens Maximum 5 inches reel
Foward & Rewind time::-1:1++--ees-eerrereeee Forward Up to 3 minutes
Rewind Up to 2.5 minutes
Frequency response <--:-s1+--seeeere rere teer eet 100-7000 % at 3-% in/sec
100-4000 % at 1-7% in/sec
Loudspeakers+-++++1+-1eserreee 2-34" 4-14” permanent dynamic speaker
Voice coil impedance 8 ohms
Signal-to-noise ratio «<1: reese ert te cree errr teeter teeta tees Over than 40 db.
Dimensions: 11-14" widthx 10-14” depth x 3-54” height
Weiight-ss:srerrreerereeereeree tenes 8.6 lbs. (3.9kg) approx. (excl batteries)
Tools & Gauges Required
To make the adjustment of mechanism practically no tools are
needed. However, in order to ascertain the accuracy of
mechanism as to whether it is operating as originally designed
the following gauges are to be used:
Type of Gauges Extent of Measurement (Coverage)
Tester DC 10V, DC 300mA Range.
‘ 0—300 gr. 0-100 gr.
| Tension Gauge 0-1 Kee 0-3 Ke |

Sanyo MR-110 Specifications