Sony M-200MC, Руководство по обслуживанию

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8
M-200MC
SECTION 3
MECHANICAL ADJUSTMENTS
SECTION 4
ELECTRICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback/erase head pinch roller
rubber belts capstan
2. Demagnetize the record/playback/erase head with a head de-
magnetizer. (Do not bring the head demagnetizer close to the
erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
Power supply voltage : 3 Vdc
TAPE SPEED switch : 2.4cm
Torque Measurement
Mode Torque Meter Meter Reading
0.49 – 0.98 mN • m
Forward CQ-102M
(0.07 to 0.140 oz • inch)
0.49 – 0.98 mN • m
Reverse CQ-102MR
(0.07 to 0.140 oz • inch)
more than 2.94 mN • m
Fast Forward CQ-201M
(more than 0.42 oz • inch)
more than 2.94 mN • m
Rewind CQ-201M
(more than 0.42 oz • inch)
Tape Tension Measurement
Mode Tension Meter Meter Reading
more than 25 g
Forward CQ-403M
(more than 0.35 oz)
more than 25 g
Reverse CQ-403MR
(more than 0.35 oz)
Test Tape
Type Signal Used for
Tape Speed
(cm/s)
S-2-A030A 3 kHz, – 20 dB Head Azimuth Adjustment 2.4
WS-24 3 kHz, – 10 dB Tape Speed Adjustment 1.2/2.4
Record/Playback/Erase Head Azimuth Adjustment
Setting:
VOL control : mechanical mid
TAPE SPEED switch : 2.4cm/s
VOR switch
: OFF
FAST PB switch : OFF
Procedure:
1. Mode : Playback
EAR jack (J101)
set
16
Ω
test tape
S-2-A030A
(3 kHz, –20 dB)
level meter
2. Turn the adjustment screw to obtain the maximum reading on
level meter.
Note: Several peaks may appear, but the maximum.
Adjustment Location :
First remove the lid.
Remove the lid
Tape
Head azimuth
adjustment screw
(FWD)
(REV)