Sharp VC-MH80

VC-MH80
VC-MHSO
Capstan shaft
Tension gauge adapter
Figure 4-15.
1. Detach-the pinch roller from the capstan shaft.
2. Set the tension gauge by hooking the tension
gauge adapter onto the pinch roller shaft.
3. Gradually release the pressureto allow the pinch
roller to touch the capstan shaft. When the
pinch roller just touches the capstan shaft, read
the indication on the gauge.
4. Check that the reading of the tension gauge is in
the range of 900 to 1200 g.
CHECKING AND ADJUSTMENT OF TENSION
POLE POSITION
Remove the cassette housing control assembly.
Make a short-circuit between TPSOOI and
TP5002, both located on the timer PWB. Now
turn on the power.
Setting
Open the lid of cassette tape (E-180), and hold it
with two pieces of vinyl tapes.
Load the cassette tape into the unit.
Put the weight (5009) on the cassette tape.
Cassette tape
float (5009)
Figure 4-l 6.
l Checking
1. Set a cassette tape, press the REC button and get
the tape loaded. Now check the tension pole po-
sition.
2. Visually check to see if the left end of the tension
pole is in alignment with the line 0.2 mm left of
the center line of the 51 roller. Readjust as re-
quired in the following steps.
Tension pole
/
Make the adjustmentwith the
beginning of a E-180 tape.
Figure 4-17.
0 If the end is at the left from the dotted line:
1.
2.
Figure 4-18.
Remove the cassette and pressthe REC button to
make an empty loading. Put a bladed screwdriv-
er into the tension band positioning cam and
turn it clockwise.
Place the cassette in position and check the ten-
sion pole position.
8 If the end is at the right from the dotted line:
j 0
rq
+A
0.2mm
Figure 4-19.
Remove the cassette and press the REC button to
make an empty loading. Put a bladed screwdriv-
er into the tension band positioning cam to turn
it counterclockwise.
Place the cassette in position and check the ten-
sion pole position.
18