JVC CH-X400 Service Manual page 11

Pickup assembly
1. Remove the three mechanism PCB fixing screws (6) located
on the back of the traverse mechanism.
2. 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
PCB assembly.
3. Short-circuit the grounding point on the mechanism PCB
assembly, and lift it with the flexible PCB attached to
connector CN501.
Next, short-circuit the grounding point on the pickup unit
and disconnect CN501.
4. Remove the screw (7) to remove the feed motor assembly.
5. Remove the screw (8) to remove the shaft holder retaining
the feed slide shaft assembly and the middle gear.
6. Remove the middle gear.
7. Move the pickup assembly upward from the gear section
and remove it from the traverse chassis assembly.
8. Remove the two screws (9) to remove the rack arm.
9. Pull out the feed slide shaft assembly.
10. Remove the screw (10) to remove the spring.
Note: Before replacing the pickup, be sure to short-circuit the
grounding points. First short-circuit the PCB section and
then immediately short-circuit the pickup section.
Grounding point
Feed motor
Remove gears and
motors only when
required.
Pickup assembly
Fig. 24
Pickup flexible PCB
Pickup: Remove
after shorting
6
Feed motor
8
Shaft holder
Feed slide shaft assembly
Middle gear
Chassis
7
Rack arm
CH-X400/CH-X450
CN501
Tray motor wire
Spindle motor
Grounding point
Fig. 23
10
Pull out
9
Fig. 25
6
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