Technics RS-615US-D - Page 8

IV.
MEASUREMENT
&
ADJUSTMENT
METHOD
NOTE:
1. Make sure heads are clean.
2. Make sure capstan and pressure roller are clean.
4. Dolby NR switch: OUT
5. Tape selector: NORMAL
3. Judgeable room temperature: 205°C (68+9°F)
Pressure of pressure roller
Equipment:
* Tension gauge (max. 500 gr)
MEASUREMENT & ADJUSTMENT
. Place UNIT into playback mode.
. Hook the tension gauge to pressure roller lever and pull it in the direc-
tion of the arrow as shown in fig. 9.
. Measure the tension at the moment when the pressure roller moves
away from the capstan.
Standard value: 400+50gr
Adjustment method
Bend the part (A) of the pressure roller spring in either direction shown
by the arrow until the correct pressure is attained.
REMARKS
* Playback mode
i
Pressure
roller spring
Fig. 9
—_{_
Takeup tension
Equipment:
+ Cassette torque meter
(SRK-CT or RP8063)
1. Mount cassette torque meter on UNIT.
2. Place UNIT into playback mode and read takeup torque.
3. Measure several times and determine the mean value.
7
|
Standard value: 50+ 10gr-cm
If the measured value is not within standard, firstly clean the rotational
parts of the mechanism with alcohol, and if it still is not within standard,
make the following adjustment.
Adjustment method
Adjust by turning the plate spring attached in the takeup reel table (See
fig. 10).
* Playback mode
Plate spring
Fig. 10
Auto-Stop detecting piece
tension
Equipment:
* Tension gauge (max. 100 gr)
1. Place UNIT into playback mode.
2. Press part (D) of the detecting piece in a straight line in the direction
of the arrow as shown in fig. 11.
[
| Standard value: 50+10gr |
i
Adjustment method
Adjust by bending the part (E) of the detecting piece spring.
* Playback mode
(E)
Detecting “At
Piece Spring
CE+R/P Head