Panasonic JU-475-4 Service Manual page 17

Installation Adjustment
(1) Remove the shield plate as described in section (1) Remove the cartridge guide assembiv as
12.1 step (1). described in section 12.7.
(2) Disconnect the J3 connector from PCB. (2) Remove the lifter unit as described in section
(3) Draw out the pins the track 0 sensor assemblv 12.12
from the following locations on the J3 (3) Remove the collet assembly from the guide
connector : No2, 4, 6. shaft.
At that time, draw out the pins with lifting the (4) Reverse the above procedure to reinstall.
stopper on the connector. (5) After reinstallation, perform collet assembly
(4) Remove the track 0 sensor assembiv mounting center adjustment.
screw and take out the track 0 sensor assembly. (6) Collet assembly center adjustment.
(5) Reverse the above procedure to reinstall. a) Temporarilv fasten the cartridge guide
(6) After reinstallation, adjust the track 0 sensor as assembly.
described in section 9.9. b) Inserta diskette or dummy diskette and
clamp it.
Track 0 (Blue) c) Clamp repeatedly a few times to find a
Track 0 (White) good fit between the collet and the inside
Track 0 (Yellow) 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.
Stopper 1
Collet Assembly
.12-4 Collet Assembly Removal
Fig. 12-3 Track 0 Sensor Assembly Removal
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