Checking The Tension And Torque - Sony SLV-360 Service Manual

4-1-8. CHECKING THE TENSION AND TORQUE
Purpose: To check that the tension, torque and compression
force of the tape take-up section and mobile sections
to ensure smooth tape run and achieve standard VIR
performance.
If the tape transport is not smooth or problems occur
in relation to the tape transport speed, perform the
following check.
Each operation mode without loading a
cassette tape. (Refer to section 1-3.)
Torque gauge, Torque gauge adaptor Measuring instrument
Item VTR operation mode
Main brake torque Stop
Review torque Review
Take-up torque Playback
Back tension torque Playback
[Check Method]
Measure the torque using the torque gauge and torque gauge
adaptor with the torque gauge fixed.
Torque gauge
Torque gauge adaptor
Reel disk
Fig. 4-9
Reel to be measured
Supply and take-up reels
Supply reel
Take-up reel
Take-up reel
A=
Measurement value
170 g*cm or more
180 + 30 gecm
(using the torque cassette)
95 + 25 g*cm
(using the torque cassette)
33 to 44 gecm
(using the torque cassette)