Sharp VC-A30G Serviceanleitung Seite 22

VC-A30G(BR) VC-A30S(BR)
VC-A30GM(BR) VC-A30SM(BR)
VC-A30Q0MI(BR) VC-A30SV(BR}
CHECKING AND ADJUSTMENT OF RECORD
/ PLAYBACK BACK TENSION
@ Remove the cassette housing control assembly.
@ Checking Vinyl tape
Open here
Figure 1-42. Not used.
Push the record button
to place the unit
in the record mode.
Figure 1-40.
1. Put a cassette torque meter into the unit.
2. Push the record button to place the unit in the
record mode.
3. Check that the back tension indicated by the
gauge is within the set range 23 to 28 g.cm.
Notes :
1. Make sure that the video cassette tape is over
the retaining guide.
2. Make sure that the tape is not slack nor
damaged at either end.
© Adjustment CHECKING THE BRAKE TORQUE
. If the reading of the cassette torque meter is less @ Checking the brake torque at the supply side
than specified, move the tip of the tension spring
hook plate toward the hole A.
2. If the reading of the cassette torque meter is
more than specified, move the tip of the tension
spring hook plate toward the hole B.
* Put a thin screw driver (-) in the shaft hole, lean
it toward you, and turn it for easier shift of the
tension spring hook plate in the direction of A or
B.
—
'el
i Tension spring
\
Cn
VK
Supply reel
. disk
Hole B-. As Hole A
CW: 280-720 g.cm
CCW: 90-230 g.cm
Tension spring
hook plate
Tension spring hook plate Adjust the idler gear
in the center.
Figure 1-41. Mechanism chassis Figure 1-43.
22