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3-2-3.
REVIEW Torque Check
Procedure :
1. Turn on the power switch and insert FWD torque
meter TW- 7131.
2.
Put the set into the TEST mode'
3.
Put the set into the REVIEW ( >
+ 11 ) mode'
(Press the REW (<<) button continuouslv in the FWD
mode.)
4.
Check that the rewinding torque at the supplv
side is
15 to l8g cm.
5.
If the torque value does not satisfy the specification'
short the tap of RVSUP or RVSDN and recheck'
6.
After check, cancel the TEST mode'
Check Point :
Servo board (soldering side)
g'2-4. FF,/REW Torque Check
Procedure :
1. Turn on the power switch and insert FF'IREW
torque
meter TW-7231.
2. Put the set into the TEST mode'
3. put the set into the FF (}})
and REW (<<) modes
and check that the torque value is 30 to 45g cm
or
more.
4. After check, cancel the TEST mode'
DTC-
3-2-5. Tracking Voltage Adiustment
Adjustment :
1. Connect a digital tester between pin 6 of
IC525 and
GND.
2.
Turn on the power switch, insert blank tape
TY-308'
and put the set into the STOP
( I ) mode'
3.
Àdjust RV509 so that the tester reading is 2'9V
* SmV'
Note : When performing the tracking voltage adjustment'
be sure to adjust the capstan speed at x 1 and
x1'5'
Adjustment Location :
Servo board (soldering side)
3-2-6. Capstan Speed Adiust."nl
(x l)
Adjustment :
1. Connect a frequencv counter to pin ?
(CFG) of IC516'
2.
Turn on the power switch, insert blank tape TY-30B'
and put the set into the PLAY ( ) ) mode'
3.
Adjust RV508 so that the frequency counter reading
is
674 X lHz.
Note : When performing the capstan speed adiustment
(x 1), be sure to adjust the capstan speed at (x 1'5)'
Adjustment Location :
Servo board (soldering side)
- 13-
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