Sharp VC-AA350A Service Manual page 15

• 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 position of the tension pole is
+ 0.5
within the 0 mm from the left side line.
– 0.2
Standard A = 0
A
Make the adjustment with the beginning of a E-180 tape.
Figure 4-13.
At left side from the reference line. (A).
A
Figure 4-14.
Insert the tension pole adjustment driver to main chassis
hole, and rotate clockwise.
At right side from the reference line. (A).
A
Figure 4-15.
Insert the tension pole adjustment driver to main chassis
hole, and rotate counterclockwise.
+ 0.5
mm
- 0.2
Tension pole adjustment driver adjusting direction
Figure 4-16.
4-13 CHECKING AND ADJUSTMENT OF
RECORD/PLAYBACK BACK TENSION
∗ ∗ ∗ ∗ ∗ Checking can be perform with or without
cassette housing control.
• Remove the cassette housing control assembly.
• After short-circuiting between TP803 and TP802 pro-
vided at main PWB, plug in the power cord.
• Setting (without cassette housing control)
1. Turn off the power switch.
2. Open the cassette torque meter and fix with tape.
3. Set the cassette torque meter in loading state.
4. Put the weight (500g) on the cassette torque meter.
5. Turn on the power switch.
• Setting (with cassette housing control)
1. Insert cassette torque meter.
500g
Weight to prevent
float (500g)
Figure 4-17.
• 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 3.9 to 5.5mN⋅m (40 to 56gf·cm) by seeing the
indication of torque cassette meter.
15
VC-AA350A/L/M/W
VC-AA352W,AA360A,AA370A
VC-AA550A/L/W,AA560A,AA570A
Tension pole
adjustment
driver
Cassette torque
meter