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CH-X470RF
Pickup replacement procedure
Remove the bottom cover, front panel and top cover
1.
from the exterior section.
2.
Unplug the flexible ribbon wire from connector
CN502 on the traverse mechanism PC board
assembly.
3.
Turn the rear slider and third gear in the lifter section
counterclockwise until the traverse mechanism
assembly is in the lowermost (bottom) position.
4.
Unsolder the two wires (black and brown) connected
to the tray motor.
5.
Remove the two screws M from the round holes on
the chassis (R) assembly to remove the lifter bracket
(L).
6.
Remove the lower rod.
7.
Disconnect the two feed motor wires (blue and
white), two spindle motor wires (red and black) and
two tray motor wires (brown and black) that are
soldered to the mechanism board.
8.
Short-circuit the grounding point on the mechanism
board. Move
the
disconnecting the wire from connector CN501. Solder
the short circuit round on the pickup assembly.
9.
Disconnect the wire from connector CN501 on the
mechanism board.
10.
Remove the three fixing screws N from the round
holes on the chassis (R) assembly to remove the
traverse mechanism board assembly.
11.
Remove the pickup shaft holder fixing screw P to
remove the pickup assembly.
CAUTION:
When replacing the pickup, be sure to apply
countermeasures against static electricity
(grounding the operation table, wrist band
and soldering iron). To remove it, first short-
circuit
the
mechanism board, then lift the mechanism
board assembly with CN501 connected.
Next, short-circuit the grounding point on
the pickup main unit, then unplug the pickup
flexible board from connector CN501.
CAUTION:
When reassembling, perform in the reverse
order.
1-18
(See Fig.49 to 55)
mechanism
board
without
grounding
point
on
Main PCB assembly
M
Unsolder
Lifter bracket (L)
Grounding point
N
Tray motor
assembly
Traverse mechanism
board assembly
Spindle motor
Pickup assembly
the
Pickup
Short circuit round
(Drounding point)
Third gear
M
Feed motor
CN502
assembly
Fig. 49
Unsolder
N
N
CN501
Fig. 50
Shaft holder
P
Fig. 51
Flexible wire
Fig. 52
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