CH-X460 Removing the mechanism board / pickup assembly (See Fig.23 to 26)
1. Remove the three screws N fixing the mechanism board 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 board. 3. Short-circuit the grounding point on the mechanism board. Move the mechanism board without disconnecting the wire from connector CN501. Solder the short circuit round on the pickup assembly. 4. Disconnect the wire from connector CN501 on the mechanism board. 5. Remove the screw O assembly. to remove the feed motor
Flexible wire CN501 Brown and black
Red and black
N N
Mechanism board
Blue and white
Fig. 23
6. Remove the screw P to remove the shaft holder retaining the feed slide shaft assembly and the middle gear. 7. Move the middle gear.
Pickup
8. Move the pickup assembly upward from the gear section and remove it from the traverse chassis assembly. 9. Remove the two screws Q to remove the rack arm. 10. Pull out the feed slide shaft assembly. 11. Remove the screw R to remove the spring. CAUTION: To reattach the mechanism board, connect the pickup flexible wire to connector CN501 on the mechanism board before unsoldering the short circuit round. Subsequently, fix the mechanism board using screws.
Short circuit round (Grounding point)
Fig. 24
Pickup assembly
Grounding point
P
Shaft holder Feed slide shaft assembly
R
Spring
Feed motor
Middle gear
Chassis Rack arm Pull out Remove gears and motors only when required.
