Sony BVW-55 Maintenance Manual page 350

5-2. S Tension Regulator Offset/Gain Adjustment
1. S tension regulator offset check
(1) Put the unit into the unthreading end state by
pressing the EJECT button.
(2) Adjust the output level at TP700 on the SV-
206 board for 0 V using RV1 on the SR-65
board, when the S tension requlator arm is in
the unthreading end state.
(3) Put the unit into threading end state by
pressing the STOP button.
(4) Passing the parallel pin (d = 2 mm) through
the square hole on the S tension regulator arm
and the round hole on the mechanical deck.
(5) While keeping the state of step (3), check that
the output level at TP700 meets the specifica-
tion 1.
Specification 1: 0.00 ± 0.02 V
If the specification is met, perform step 3 and
later.
If not, perform step 2 and later.
2. S tension regulator offset adjustment
(1) While keeping the previous step, loosen the
two screws fixing the SR-65 board about one
or two turn.
(2) Insert the flatbladed screwdriver (3 mm) into
the notch of the SR-65 board, adjust the
position of the board to meet the specification
1.
(3) Tighten the two screws loosened in step (1).
Tightening torque:
_2
20 x 10 N.m {2.0 kgf.cm}
(4) Recheck the output level at TP700 to meet
the specification referring to step 1.
5-8
RV1(offset VR)
SR-65 board
Parallel pin
Square
hole
Screws
SR-65 board Notch
Spec. 1 : 0.00 ±0.02 V
S tension regulator arm
Specified sensor
BVW-55 P2