Table of Contents
Advertisement
Adjustment
l
torque is outside the range, clean
the capstan D.D. motor pulley, reel belt and reel
pulley with-cleaning liquid, then recheck the
torque.
the reel belt.
Notes:
fly off.
the reel disk locked for a longer time.
CHECKING AND ADJUSTMENT OF TAKE-UP
TORQUE IN PLAYBACK MODE
Remove the cassette housing control assembly.
Make a short-circuit between TP8804 and
on the VCR PWB, with a 22 ohm resistor. Now
plug in the power cord and turn on the power.
Open the lid of the cassette torque meter, and
hold it with two pieces of vinyl tapes.
Load the cassette torque meter into the unit.
Put the weight (5009) on the cassette torque
meter.
Press the REC button to put the unit in REC
mode.
Set value EP 8.8 + 3.8mN.m (90 f 39gf-cm)
Figure l-1 0.
Checking
Check that the torque is in the range of 8.8 +
The torque fluctuates due to the rotational
deviation of the reel pulley ass'y. Use the center
of the fluctuation as the value.
Place the ass'y in the SP record mode, and check
that the take-up torque is within the range.
Adjustment
If
the take-up torque in the playback mode is
outside the range, replace the reel pulley ass'y.
Note:
Stabilize the cassette torque meter to prevent
floating.
CHECKING AND ADJUSTMENT OF TAKE-UP
TORQUE IN VIDEO SEARCH REVERSE
MODE
Remove the cassette housing control assembly.
l
Make a short-circuit between TP8804 and
l
on the VCR PWB, with a 22 ohm resistor. Now
turn on the power.
Setting
l
playback mode.
video search reverse mode.
Checking
l
and turn it counterclockwise very slowly (one
rotation every 1 to
2 seconds) and
torque is within the set value 14.5 Ti mN*m (148
Torque gaug
Figure l-l 1.
Note:
Set the torque gauge securely on the supply reel
disk. If it is not secure, the measurement will be
incorrect.
Adjustment
l
If the take-up torque in video search reverse mode
is outside the range, replace the reel pulley ass'y.
Note:
The torque fluctuates due to the rotational
deviation of the reel pulley ass'y. Use the center of
the fluctuation at the value.
check that the
Supply reel disk
Advertisement
Table of Contents
