Sharp VC-M23SM Servicehandbuch Seite 17

2. Visually check to see if the center of the tension pote is in
alignment with the line 1.3 mm left of the center line of the sup
guide shaft. Readjust as required in the following steps.
Sup guide shaft
1.3 Make the adjustment with the
beginning of a E-180 tape.
Figure 4-15,
@® If the center of tension pole is at the left from the dotted line:
1.3
Figure 4-16.
Put a bladed screwdriver into the tension pole ADJUSTER and
turn it clockwise. .
@ lf the end is at the right from the dotted line:
©)
O i
<
Figure 4-17..
Put a bladed screwdriver into the tension pole adjuster to turn it
counter-clockwise.
@ Adjustable range of the tension pole ajuster... — -
® Adjustable range of tension pole adjusting cam.
Tension adjusting ca
Main en pole adj g cam
chassis
Figure 4-18.
Adjust the tension pole adjuster so that the circle mark on the
cam be within 90° Jeft and right.
CHEKING AND ADJUSTMENT OF RECORD/
PLAYBACK BACK TENSION
Remove the cassette housing control assembly.
Make a short-circuit between TP5005 and TP5006, both
located at the left on your side on the main PWB. Now turn
on the power. ,
Setting
. Open the lid of cassette torque meter, and hold it with two
pieces of viny! tapes.
. Load the cassette torque meter into the unit.
. Put the weight (500g) on the cassette torque meter.
Weight to prevent
float (500g)
Cassette torque
meter
Figure 4-19. |
¢ Checking
1. Push the REC button to place the unit in the record mode.
2, Check that the back tension indicated by the gauge is within
the set range 31 to 38 g-cm.
Notes:
1. Make sure that the video cassette tape is over the retaining
i
'17
guide.
Make sure that the tape is notslack nor damaged at either end.