28
MDS-SE9
Record/Playback Head Azimuth Adjustment
Procedure:
1.
Mode : Playback
2.
Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1 dB of peak.
L-CH peak
R-CH peak
screw position
output
level
within
1 dB
L-CH peak
R-CH peak
screw position
within 1dB
TAPE SECTION
0 dB=0.775V
1.
Demagnetize the record/playback head with a head demagne-
tizer.
2.
Do not use a magnetized screwdriver for the adjustments.
3.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
4.
The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit ad-
justment.)
5.
The adjustments should be performed for both L-CH and R-
CH.
6.
Switches and controls should be set as follows unless other-
wise specified.
test tape
P-4-A100
(10kHz, –10dB)
level meter
set
+
–
MD/TAPE OUT (J401)
Tape
P-4-A100
WS-48B
10 kHz, –10 dB
3 kHz, 0 dB
Azimuth Adjustment
Tape Speed Adjustment
Signal
Used for
SECTION 6
ELECTRICAL ADJUSTMENTS
SECTION 5
MECHANICAL ADJUSTMENTS
PRECAUTION
1.
Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head rubber belts
capstan
2.
Demagnetize the record/playback head with a head demagne-
tizer.
(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
supply voltage unless otherwise noted.
Torque Measurement
Torque
Torque Meter
Meter Reading
FWD
CQ-102C
2.94 to 7.74mN •m
(30 to 79g •cm)
FWD
CQ- 102C
0.20 to 0.59mN •m
back tension
(2 to 6g •cm)
REV
CQ- 102RC
2.94 to 7.74mN •m
(30 to 79g •cm)
REV
CQ-102RC
0.20 to 0.59mN •m
back tension
(2 to 6g •cm)
FF,REW
CQ- 201B
6.86 to 17.64mN •m
(70 to 179g •cm)
FWD
CQ-403A
9.80mN •m or more
tension
(100g •cm or more)
REV
CQ-403R
9.80mN •m or more
tension
(100g •cm or more)
tape mechanism deck
adjustment screw
