Track 0 Sensor Removal And Installation; Collet Assembly Removal. Installation And Adjustment - Panasonic JU-475-4 Service Manual

12.3 Track 0 Sensor Assembly Removal and
Installation
(1) Remove the shield plate as described in section
12.1 step (1).
(2) Disconnect the J3 connector from PCB.
(3) Draw out the pins the track 0 sensor assembly
from the following locations on the J3
connector: N02, 4, 6.
At that time, draw out the pins with lifting the
stopper on the connector.
(4) Remove the track 0 sensor assembly mounting
screw and take out the track 0 sensor assembly.
(5) Reverse the above procedure to reinstall.
(6) After reinstallation, adjust the track 0 sensor as
described in section 9.9.
Track 0 (Blue)
Track 0 (White)
Track 0 (Yellow)
Stopper
t
-~
1)0
Fig. 12-3 Track 0 Sensor Assembly Removal
~,15 -
12.4 Collet Assembly Removal. Installation and
Adjustment
(1) Remove the cartridge guide assembly as
described in section 12.7.
(2) Remove the lifter unit as described in section
12.12
(3) Remove the collet assembly from the guide
shaft.
(4) Reverse the above procedure to reinstall.
(5) After reinstallation, perform collet assembly
center adjustment.
(6) Collet assembly center adjustment.
a) Temporarily fasten the cartridge guide
assembly.
b) Insert a diskette or dummy diskette and
clamp it.
c) Clamp repeatedly a few times to find a
good fit between the collet and the inside
diameter of the drive motor.
d) Bind the screws of the cartridge guide.
e) Check step c) again, if not good repeat step
a) through d) until the correct center
adjustment is achieved.
Collet Assem
bly
Fig.12-4 Collet Assembly Removal