Sanyo M2422F - Torque Adjustment

-ECIFICATIONS
.PE RECORDER SECTION
cording system: AC bias, double track
. rasing system:
Tape speed:
Recording time:
DC erase
1-7/8 ips. (4.75cm/sec.)
60 min. (C-60 cassette)
Rewind & Fast forward time: 90 sec. (C-60 cassette)
Frequency response: 50 ~ 10,000Hz
Wow & Flutter: 0.3% RMS
Signal to noise ratio: 40 dB
Input: EXT MIC: 680 ohm
AUX: 220K ohm
Output: EXT SP: 8 ohm
RADIO TUNER SECTION
Frequency range: MW: 530 ~ 1,605kHz
GENERAL
Output power:
Power source:
Speaker:
Dimensions:
Weight:
FM: 88 ~ 108MHz (M2422F)
SW1: 2.3 ~ 7.3MHz (M2422H)
SW2: 7.3 ~ 22MHz {M2422H)
2.2W maximum
DC: 6V (UM-1 x 4)
AC: 120/200/240V
4-3/4" (12cm) P.D.S.
8-5/16''(H) x 4-1/32'(D) x 13-7/32"'(W)
(211 x 102 x 335mm)
6 Ibs. approx.
ADJUSi MENT OF PINCH ROLLER
oh
Set the unit to the PLAY mode.
2. Apply a tension gauge to the pinch roller. Read the gauge at the
precise moment when the pinch roller separates from the capstan.
3. If the gauge reading is within a range of 450 - 650 g, no adjustment
is necessary,
if otherwise, make adjustment by changing the force of
the spring coil. (See exploded view No. 21)
TUNER ADJUSTMENT
AW ADJUSTMENT (M2422F & M2422H) ;
PREPARE:
Adjusting
ccs
0.8. C.
3
4
6 |
FT
AERIAL
Repeat adjustments.
Connect sweep
generator to test
loop.
Connect oscilloscope
to EXT. SP terminals.
Connect AM SG to | Connect VTVM to
test loop. speaker terminals.
Connect AM SG to | Connect VIVM to
test loop. speaker terminals.
1. Variable Capacitore completely closed.
2. Set the dial pointer to very left line of dial scale.
3. Connect sweep generator, AM SG, VTVM and oscilloscope.
SG frequency | Position of tuning dial | Adjustment ve
Oscilloscope
455
KHz
(400
Hz
Low
end
of
dial
scale.
30%
modulation)
S03 nedlton 108 a
eee eee ee
30% modulation)
30% modulation)
TORQUE ADJUSTMENT
1. Set the unit to the PLAY, FAST FORWARD or REWIND mode.
2. Measure the each torque with a torque gauge. They should be as
following;
PLAY 30 - 60 g/cm
FAST FORWARD 60 - 130 g/cm/cm
REWIND 60 - 130 g/cm/cm
3. If the each torque fails to reach the standard value. Clean the drive
belt, flywheel, motor pulley, take-up reel, idler and rewind roller
with a cotton swab soaked in alcohol. ~
ADJUSTMENT OF HEAD “AZIMUTH
1. Connect the unit to a power source and insert a test cassette tape
(7K Hz pre-recorded) in the cassette compartment.
2. Connect an 8 ohm dummy load with the VTVM across it to the
EXT. SP jack on the unit.
3. Set the unit into the PLAY mode and turn the tone contro! knob
untill maximum.
4. Turn the head azimuth adjusting screw until the maximum valu
with reading on the VIVM.
5. Fasten the adjusting screw securely by applying paint or glue.
SCREW ORIVER
COUNTERCLOCKWISE
CLOCK WISE
AZIMUTH ALIGNMENT
ERASE HEAD TEST TAPE iC ASSET TE)
Hepes RECORD ‘PLAY HEAD
mh dy
RPL
THESE ARE NOT ADJUSTING SCREWS HEAD @
LEAVE THEM UNTOUCHED
Clockwise GouNTER
COCKWISE
PERPENDICULARLLY INCLINATION
OF R P HEAD
Fig. 2
At position of no MAX.
untequired signal. (
4. Selector switch to “AM".
5. Use a screwdriver with plastic grip for all adjustments.