Pioneer CRT3452 Service Manual page 94

1
Precautions when making servicing works
1) Since the upper surface of the arrowed magazine slot
A
in the DVD/CD mechanism unit can be deformed
comparatively easily, do not hold this section when
making servicing work. (Refer to Fig. 6)
2) The stage mechanism projects downward beyond the
low end of the chassis when it is reset.
Consequently, the stage mechanism may be damaged
to cause functional failures when handled carelessly.
When placing the mechanism, pay great attention not
B
to damage the gear and the pickup unit.
- Removing the pickup unit(Fig. 7)
1. Set the short switch of the pickup unit to the SHORT
side.
2. Remove the flexible PCB from the connector.
3. Unscrew one screw A to remove the grease cover.
4. Unscrew one screw B to remove the plate spring A.
5. Unscrew one screw C to remove the plate spring B.
6. Remove the pickup unit together with the main shaft.
C
7. Remove the cushion from one side only to pull out
the main shaft. AT this time, pay attention not to lose
the removed cushion.
Cushion
D
Main Shaft
Pickup Unit
E
F
94
1
2
- Removing the PCB unit(B)(Fig. 7)
1. Remove soldering from the linear position sensor
2. Unscrew the two screws D to remove the PCB unit(B).
- Precautions when installing the linear position
1. If the linear position sensor (VR301) is not being
When installing the linear position sensor to the
Short Switch
C
Plate
Spring B
B
Cushion
A
Plate
Spring A
VR301
U-groove
XDV-M8357ZT/UC
2
3
(VR301).
sensor(Fig. 7)
properly inserted into the U-groove provided in the
detection lever, elevation movement failures can
occur.
DVD/CD mechanism unit, be sure to insert it into the
U-groove provided in the detection lever securely.
PCB
D
Unit(B)
Grease
Cover
Soldering
D
Detection Lever
3
4
DVD/CD Mechanism Unit
Fig. 6
Fig. 7
4