Sharp VC-780E Service Manual page 16

| VC-790ET
Figure 1-16. Not used. . .
16
CHECKING THE BRAKE TORQUE
A) Checking the brake pergue: at the sueply side.
® Checking ee Jte
1. Remove the cassette housing. Reamibhy
2. Check that the mechanism isin the! istop mode.
Note: The stop. mode is brought 'about by
unplugging the power cord,with the
mechanism in the fast forward or yeving
mode.
3. Separate the idler gear from the supply rear disk"
and place the wae gauge. on the supply reel
disk. :
4. Slowly rotate thie torque gauge in the Ciseiies
(CW) direction ofthe supply brake so that the
reel disk and the gauge needie rotate at the
same speed. Do the same in the counterclockwise
(CCW) direction of the supply brake. Check that
the values' are within the specitied range (CW
direction = 280 to 720 g.cm, CCW direction
= 110 to 230 g. cm), and thatthe 'brake torque in
the CW direction is at least- twice as nigh as that
:a °
in the CCW direction.
Supply reel disk
_ Torque gauge. .
give Xx
Torque' gauge ' ,
head Ue 4
7 Supply fe disk vy
Reel ile
—_——SS—s— I SF Idler gear "
(center gear) » =e =
fa) top cide ' - (b) side view
Figure 1-17. ;
® Adjustment
1. If the supply brake torque is outside the specified
range (CW direction = 280 to 720 g.cm, ccw
direction = 110 to 230 g.¢m), clean the supply
reel disk and brake lever felt, then recheck the
torque. .
2. If the supply brake torque is stil! outside the
specified range, replace the main brake spring.
a Checking the brake torave at the take-up side.
e Checking
1. Rerriove the cassette housing assembly.
2. Check that the mechanism is in the stop mode.
Note: Thé stop mode is brought about by
unplugging the power cord with the
mechanism inthe fast forward to. ee
mh mode. G r e e W e ae
qu
and piace the: torque gauge. 'on the akan: réel
iOisk: -