TCM-400DV
5
SECTION 3
MECHANICAL ADJUSTMENTS
Tape Tension Measurement
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head rubber belt
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. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage (2.5 V) unless otherwise noted.
Mode Torque Meter Meter Reading
1.97 – 3.92mN•m
FWD (20 – 40 g•cm)
CQ-102C
(0.28 – 0.55 oz•inch)
0.05 – 0.49 mN•m
Forward Back
(0.5– 5 g•cm)
Tension
(0.007 – 0.069 oz•inch)
FF, REW CQ-201B
more than 4.91 mN•m
(more than 50 g•cm)
(more than 0.69 oz•inch)
Mode Tension Meter Meter Reading
FWD CQ-403A
more than 50 g
(more than 1.76 oz)
2-4. BELT (CAP), BELT (PULLEY), M901 (CAPSTAN/REEL MOTOR),
HRP901 (REC/PB HEAD), HE901 (ERASE HEAD)
HRP901
(REC/PB head)
Attaching belt (CAP)
and belt (pulley)
z
Belt (CAP)
Belt (CAP)
Belt (pulley)
Belt (pulley)
Screws (M1.4)
3
M901
(Capstan/reel
motor)
4
1
8
7
Fly ASSY,
capstan
Washer
6
Washer
5
0
qs
9
2
Washer
(stopper N)
Screws
HE901
(Erase head)
qa
Screw
Torque Measurement
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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