VC-MH815 (serv.man13). Adjustment and Replacement of Mechanical Parts - Sharp VCR Service Manual (repair manual). Page 6

Notes:
1. Hold the torque gauge by hand so that it is not moved.
2. Do not keep the reel disk in lock state. Do not allow long-

time measurement.

• Setting
Press the playback button and rewind button to set the
video search rewinding mode.

• Checking
Place the torque gauge on the supply reel disk, and turn it
counterclockwise very slowly (one rotation every 1 to 2
seconds) and check that the torque is within the set value
14.1 ± 3.5mN

⋅

m. (144 ± 35gf

⋅

cm)

Set value LP 6.9

          

mN

⋅

m (70 

       

gf

⋅

cm)

• Checking
1. Make sure that value is within the setting 6.9     mN·m

(70    gf·cm).

2. The winding-up torque fluctuates due to variation of

rotation torque of limiter pulley ass'y. Read the center
value of fluctuation as setting.

3. Set the LP record mode (x2) and make sure that the

winding-up torque is within setting.

• Adjustment
If the playback winding-up torque is not within the setting,
replace the limiter pulley assembly.
Note:
When the torque cassette is set, put a weight (500g) to
prevent rise.
When the cassette torque meter is taken out.
Turn off the power switch.

Note:
Surely put the torque gauge on the reel disk to measure. If
the torque gauge is raised, accurate measurement is
impossible.

• Adjustment
If the rewinding playback winding-up torque is not within the
setting, replace the limiter pulley assembly.

Note:
The winding-up torque fluctuates due to variation of rota-
tion torque of supply reel disk. Read the center value of
fluctuation as setting.

Torque gauge

Supply reel disk

CCW

+20
–25

+2.0
–2.5

+2.0
–2.5

+20
–25

500g

Cassette torque meter