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M-540V
SECTION 3
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback/erase head
rubber belts
2. Demagnetize the record/playback/erase head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Power supply voltage : 3 Vdc
TAPE SPEED switch : 2.4cm
Torque Measurement
Mode
Torque Meter
Forward
CQ-103M
Fast Forward
CQ-201M
Rewind
CQ-201M
Tape Tension Measurement
Mode
Tension Meter
Forward
CQ-403M
8
pinch roller
capstan
Meter Reading
0.49 – 1.27 mN • m
(5 – 13 g • cm)
(0.07 – 0.180 oz • inch)
more than 2.94 mN • m
(more than 30 g • cm)
(more than 0.42 oz • inch)
more than 2.94 mN • m
(more than 30 g • cm)
(more than 0.42 oz • inch)
Meter Reading
more than 1.96 mN • m
(more than 20 g • cm)
(more than 0.28 oz • inch)
SECTION 4
ELECTRICAL ADJUSTMENTS
Test Tape
Type
Signal
S-2-A030
3 kHz, – 20 dB
Head Azimuth Adjustment
WS-24
3 kHz, – 10 dB
Tape Speed Adjustment
WS-12
Record/Playback/Erase Head Azimuth Adjustment
Setting:
VOL control
: mechanical mid
TAPE SPEED switch : 2.4cm/s
VOR switch
: OFF
Procedure:
1. Mode : Playback
test tape
S-2-A030
(3 kHz, –20 dB)
set
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 cover (AZ).
Remove the
cover (AZ).
Tape Speed
Used for
(cm/s)
2.4
2.4
1.2
level meter
16 Ω
EAR jack (J101)
head azimuth
adjustment screw
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