Sharp VT-G14, Руководство по обслуживанию

Страница: 34 / 121

34
VT-G14
VT-G21
Tension pole adjuster
Figure 1-18.
Figure 1-17.
At left side from the center line
Figure 1-15.
Figure 1-16.
• Checking
1. Set a cassette tape, push the REC button to place the
unit in the SP record mode. Now check the tension
pole position.
2. Visually check to see if the right edge of the tension
pole is within the 1.5 ± 0.25mm from the right edge of
the Sup guide shaft.
Insert the slotted screwdriver in the tension pole ad-
juster, and rotate counterclockwise.
At right side from the center line
Insert the slotted screwdriver in the tension pole ad-
juster, and rotate clockwise.
Tension pole adjuster adjusting range
Adjust so that the delta mark of tension pole adjuster
is within 90° range (left, right).
CHECKING AND ADJUSTMENT OF
RECORD/PLAYBACK BACK TENSION
• Remove the cassette housing control assembly.
• After short-circuiting TP7701 (J301) and TP7702
(J302) provided at the left on the main PWB, plug
in the power cord.
• Setting
1. Turn off the power switch.
2. Open the torque cassette meter and fix with tape.
3. Set the cassette tape in loading state.
4. Put the weight (500g) on the cassette torque meter.
5. Turn on the power switch.
• Checking
1. Push the REC button to place the unit in the SP record
mode.
2. At this time ascertain that the back tension is within
the setting (36.5 to 52g·cm) by seeing the indication
of torque cassette meter.
Make the adjustment with the beginning of a E-180 tape.
1.5 – 0.25mm
Supply guide shaft
Tension pole
1.5 – 0.25mm
1.5 – 0.25mm
90
°
90
°
500g
Cassette torque
meter
Weight to prevent
float (500g)
Figure 1-19.