Sony DNW-A100 Maintenance Manual page 314

5-19. Gear Box Assembly and Threading Motor Replacement
9. Threading Motor Installation
(1) Put portion A of the M gear into the
photointerrupter on the PTC-54 board.
(2) Pass the motor shaft through the hole of the
motor base and align the reference hole
position of the motor with that of the motor
base.
(3) Slightly apply the locking compound to the
motor fixing screws and tighten them.
n
Take care that the screwdriver does not strike
against the M gear.
(4) Put the thickness gauge (1.0 mm thick)
between the M gear and motor base.
(5) Tighten the set screw while slightly pushing
the M gear toward the motor base.
(6) Pull out the thickness gauge.
(7) Confirm that the clearance between the M
gear and motor base satisfies the specification
when the M gear is pushed toward the motor
base.
(8) Confirm that the M gear smoothly rotates
when manually rotating the M gear. More-
over, confirm that the M gear does not touch
the photointerrupter.
5-130
. M gear installation
M gear
Portion A
Photointerrupter
PTC-54 board
Set screw
Screw
(B3 x 4)
M gear
PTC-54 board
A
M gear
Spec. : 0.8 mm < A < 1.2 mm
Threading Motor Installation
Reference hole
Reference
hole
Threading motor
Screw (B3 x 4)
Motor base
Motor base
DNW-A100/A50/A45
DNW-A100P/A50P/A45P