– 18 –
5-1. MECHANICAL ADJUSTMENTS
TAPE RECORDER SECTION
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 demag-
netizer.
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 sup-
ply voltage unless otherwise noted.
Torque Measurement
Torque
Torque Meter
Meter Reading
3.54 to 5.98 mN • m
Forward
CQ-102C
(36 to 61 g • cm)
(0.5 to 0.84 oz • inch)
0.2 to 0.58 mN • m
Forward
CQ-102C
(2 to 6 g • cm)
Back Tension
(0.028 to 0.083 oz • inch)
3.54 to 5.98 mN • m
Reverse
CQ-102RC
(36 to 61 g • cm)
(0.5 to 0.84 oz • inch)
0.2 to 0.58 mN • m
Reverse
CQ-102RC
(2 to 6 g • cm)
Back Tension
(0.028 to 0.083 oz • inch)
5.99 to 14.02 mN • m
FF/REW
CQ-201B
(61 to 143 g • cm)
(0.85 to 1.98 oz • inch)
Tape Tension Measurement
Mode
Tension Meter
Meter Reading
FWD
CQ-403A
more than 100g
(more than 3.53 oz)
REV
CQ-403A
more than 100g
(more than 3.53 oz)
SECTION 5
ADJUSTMENTS
z
TRAVERSE SIGNAL check
Test mode PLAY status
Connection Point : CD board (Conductor side)
Press the
M
or
m
from test mode PLAY status.
Check to see that the traverse signal level is between 200 to
500mVp-p.
Note:
Extend the sweep time
for easier view.
200 – 500mVp-p
A
A
B
B
A = B
0V
0V
TP(RF)
IC701
[CD BOARD]
(Conductor side)
oscilloscope
(AC range)
IC701
rg
pin(TO)
JW741 (VC)
