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MECHANICAL ADJUSTMENT
Item to be
Step
Tape
Adjusted
1
Check each
CT-160L (FF, REW)
torque
TW-2111A (FWD)
TW-2121A (RVS)
2
Check FF, REW
AC-514 (C-60)
take up time
3
Azimth
MTT-114N
10kHz, –10dB
4
Tape Speed
MTT-111N
3kHz, –10dB
5
Wow/ Flutter
MTT-111N
3kHz, –10dB
ELECTRICAL ADJUSTMENT
G Use 560 mV (250 nwb/m) for 0 dB as the standard level of the unit.
0 dB = 250 nwb/m (315 Hz) = –7 dBV (Rec out level)
<Playback section>
Item to be
Step
Adjusted
1
Playback
MTT-212N
level
315Hz,
(315Hz)
250nwb/m
Confirmation
2
Test tape for frequency check.
of playback
3180µs + 120µs (LH) (MTT-256)
frequency
3180µs + 70µs (CrO
response
G PLAYBACK FREQUENCY RESPONSE
± 3dB
± 4dB
50
250
315
1k
Fig. C
Instrument
Mode
required
Torque meter
FF REW
PLAY
FF REW
ACVM
PLAY
oscilloscope
Frequency
PLAY
counter
Wow/Flutter
PLAY
meter
Instrument
Tape
required
ACVM
ACVM
oscilloscope
) (MTT-356)
2
± 3dB
± 3.5dB
3k
10kHz
12.5kHz
Adjustment
Rating
part
FF, REW torque : within 70 ~ 150g/cm.
Take up torque : 30 ~ 70g/cm.
Back tension : 1.5 ~ 6g/cm.
80 to 120 seconds.
Azimuth
Playback output of L and R is
adjustment
maximum and phase difference should
screw.
be minimum both directions. (Fig. B)
(Fig. B)
2980 Hz ±15 Hz
VR101
Less than 0.19% (WRMS)
Points of
Adjustment
Mode
measurement
parts
PLAY
LINE OUT
VR201 (L ch)
VR202 (R ch)
PLAY
LINE OUT
KX-E100
Remarks
After the adjustment
make sure to apply screw
lock paint.
Perform adjustment at
the center of the test
tape, if possible.
Confirm at center of the
test tape, if possible.
Rating
– 5 dBV ± 0.3 dBV
Check that the 10kHz playback level
is within 0 ± 3 dB of the 1kHz
playback level. (Fig. C)
8
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