Pioneer cx 652 service manual

Page 2

CX-B52

1. SERVICING PRECAUTIONS

1)Do not carry out any work holding the upper surface
of the magazine insert slot on the mechanism,
marked by an arrow, since it deforms easily.

2)When the Stage Mechanism is positioned below the
5th level, it protrudes below the chassis. Do not
leave it in this position as it may become damaged.

2. DISASSEMBLY

. Removing the Pick-up Unit

1.Attach the Short Pin onto the Flexible P.C.Board of
the Pick-up Unit.(Fig.Zl

2. Remove the Flexible P.C.Board from the connector.(Fig.2)

3. Remove the Torsion Spring which is pressed against
the leading edge of the Feed Screw.(Fig.3)

4. Remove the Screw and Pulley Cover.(Fig.3)

5. Remove the Belt and the Pick-up Unit with the Feed
Screw still attached.lFig.3)

6. Lift the Tabs of the rack section of the Holder and re-
move the Feed Screw. While doing so, be careful not to
lose the Bearings on the ends of the Feed Screw.(Fig.3)

O Removing the CD Core Unit (Fig.2)

l.After procedures 1 and 2 for removing the Pick»up
Unit, remove the connector.

2. Remove the Elevation Motor Assy lead wires marked
with an arrow which are soldered onto the CD Core
Unit.

3. Remove screw (A), screw (B) and screws (CH2 screws),
then remove the CD Core Unit.

. Precautions for Installing the CD Core Unit

If the sensor lever of the Linear Position Sensor (Slide
Volume: VR801) of the CD Core Unit is not inserted
properly in the U-shaped Groove the elevation opera»
tion may not function properly. When installing the CD
Core Unit in the CD Mechanism Unit insert the Linear
Position Sensor (Slide Volume: V8801) securely in the
U-shaped Groove.

. Removing the Carriage Motor Assy (Fig.3)
1.After procedures 3 and 4 for removing the Pick-up
Unit, remove the Belt, and the Carriage Motor Assy.

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CD Mechanism Module

Fig.1

Short Pin

CD Core Unit

Q) .
i Pick-up Unit

sens Lever Slide Volume:VR801

Fig.2

Bearing Feed

Bearing

/Carriage Motor Assy

Fig.3