Sharp DV-NC55S Service Manual page 22

DV-NC55S/H
DV-NC60H
• 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 2.3 ± 0.25 from the right edge of the Sup
guide shaft.
Tension pole
2.3 ± 0.25
Make the adjustment with the beginning of a E-180 tape.
At left side from the center line
Insert the slotted screwdriver in the tension pole adjuster,
and rotate counterclockwise.
At right side from the center line
2.3 ± 0.25
Insert the slotted screwdriver in the tension pole adjuster,
and rotate clockwise.
Sup guide shaft
Figure 8-15.
2.3 ± 0.25
Figure 8-16.
Figure 8-17.
Tension pole adjuster adjusting range
Tension pole adjuster
Figure 8-18.
Adjust so that the delta mark of tension pole adjuster is
within 90° range (left, right).
8-16.CHECKING AND ADJUSTMENT OF
RECORD/PLAYBACK BACK TENSION
• Remove the cassette housing control assembly.
• After short-circuiting between TP5102 and TP5103
provided goes left at VCR display PWB, plug in the
power cord.
• Turn off the power switch.
• Setting
1. Open the torque cassette meter and fix with tape.
2. Set the cassette tape in loading state.
3. Put the weight (500g) on the cassette torque meter.
4. Turn on the power switch.
Weight to prevent
float (500g)
Figure 8-19.
• 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.
26
500g
Cassette torque
meter