Sony DSR-300 Service Manual page 234

4-39. FWD BACK TENSION CHECK/
ADJUSTMENT
Reel table position: Standard cassette position
Mode: PLAY
. Tool:
Torque cassette: J-6082-373-A
1. Remove the cassette compartment.
(Refer to Section 4-2.)
2. Set the torque cassette.
3. Hold the torque cassette gently so that it does not
rise, run the tape, and check that the FWD back
tension torque value (S side) satisfies the
specification.
Specification
FWD back tension torque:
If it does not, perform the following adjustment.
1) Press the EJECT key, and remove the tape.
2) Rotate the No. 1 gear, load the TR arm, and
adjust so that the TR arm hole and TC
assembly shaft hole shown in the figure lie on
a straight line.
. When the torque value is towards the + side:
Re-hook the spring at part A.
. When the torque value is towards the _ side:
Re-hook the spring at part B.
4. Perform step 3 again, and check that the torque
value satisfies the specification.
4-60
0.0011 to 0.00145 N.m
(11 to 14.5 g.cm)
S side
TC assembly
No. 1 gear
TR arm
Lie on a straight line
Part B
Part A
Spring
TR arm
DSR-300/P(E)/V1