Technics RS-M10 - Page 4

MEASUREMENT AND
ADJUSTMENT METHOD
NOTE:
1. Make sure heads are clean.
2. Make sure capstan and pressure roller are clean.
3. Judgeable room temperature: 20+5°C (68+9°F).
4. Dolby NR switch: OUT.
5. Tape selector: Normal.
Pressure of pressure roller
Equipment:
* Tension gauge (max. 500 gr)
Takeup tension
Equipment:
* Cassette torque meter
-+- QZZSRKCT
Head azimuth adjustment
Equipment:
*VTVM
* Oscilloscope
* Test tape (azimuth)
«++ QZZCFM
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 rolier moves
away from the capstan.
Standard value: 350+50gr
l
Adjustment method
Bend the part (A) of the pressure roller spring in either direction shown
by the arrow until the correct pressure is attained.
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.
= ee en
' Standard value: 50+15 gr-cm
REMARKS
* Playback mode
~ Tension
gauge
Pressure
roller
spring (A)
* Playback mode
Record/playback head adjustment
1. Test equipment connection is shown below.
LINE OUT
Test tape Playback mode VTVM Oscilloscope
Fig. 10
. Playback azimuth tape (QZZCFM 8kHz).
. Adjust record/playback head angle adjustment screw (B) in fig. 11 so
that output level at LINE OUT becomes maximum.
. Measure both channels, and adjust levels for equal output.
. After adjustment lock head adjustment screw with lacquer.
* Playback mode
Recori/playback
head