JVC CHX-200 Service manual

Removal of Main Parts

Disassembling Procedures

Perform operations according to the items to be disassembled.

Replacement of the Pickup

1. After removing the exterior (top and bottom)...

2. Proceed to the "Pickup Replacement" section.

3. When applying grease, refer to the Exploded View.
Use new grease.



Mechanism Section

1. Remove the exterior (required section only).

2. The mechanism section is designed so that each unit can be
removed separately.

3. When re-assembling, refer to the assembling precautions.
(Use new grease when applying grease.)

*Exterior Section
Removing the Bottom Cover and Front Panel
Assembly

1. Remove the screw (1-a) to unlock the mounting direction

knob located on the side of the main unit.

2. Turn the mounting direction knob in the direction of the arrow

using a coin, etc. to remove it. (The knob can be removed
only when it is set to this position.)

3. Remove the four top cover fixing screws (1) at the triangle

(A) marks on the side of the main unit. (Perform the same
operation on both sides.)

4. Turn the unit upside down so the bottom surface is facing

upward.

5. Lift the rear edge of the bottom cover slightly and lift the side

by grasping the DIN jack section on the side panel, then
turn it toward the front (raise upward) to remove the bottom
cover.

6. Unhook the four catches located on both sides of the front

panel, and turn the front panel toward the top cover (lower
down) to remove the front panel.

1 1

1

Remove 1-a and
turn in the
direction of the
arrow

1

1-a

Fig. 1

1 1

Fig. 2

Remove 1-a and
turn in the direction
of the arrow.

111-a

The front panel can be
separated by raising the
cover.

Fig. 3

Unhook catches

Unhook catches

Fig. 4

Slightly lift the
jack section to
remove.

Removing the Top Cover

1. Remove the four damper bracket fixing screws (2) to remove

the damper brackets.

2. Pull out the dampers, being careful not to damage them.

When re-attaching a damper, insert your finger to push out the

center of the damper to mount it on the damper shaft, as
shown in Fig. 6-1.

3. Turn the damper spring bracket toward the top at a right angle

as shown in Fig. 7, then push down the lower side of the
damper spring bracket to lift it off.

4. Remove the three fixing screws (3) and (4) on the DIN jack

PCB assembly.

5. Lift the changer unit upward.

6. Remove the damper springs from the mechanism chassis if

required. To reassemble, refer to the diagram below.

Apply alcohol to the shaft then
immediately attach the damper. (After
attaching, check that the shaft is
correctly inserted.)

Fig. 5

2

2

Fig. 6-1

Lift the changer unit upward

Fig. 8

Push out with your
finger before
attaching

2

2

Turn to the top position (at a right angle),

Remove the flexible ribbon
wire if required

Fig 6

then push down to lift off.

Fig. 7

4

4

Mechanism

Chassis

Silver

(mechanism side)

How to Attach the Damper Springs

Fig. 8-1

Black

(magazine side)

3

Fig. 9

Removing the Fittings

1. Remove the fixing screw (5).

2. Unhook the two catches (a) on the top edge of the fitting,

then unhook the catches (b) at the left/right bottom edges.

Catches (a)

Catches (b)

Fitting

Removing the Main PCB Assembly

1. Remove the power IC fixing screw (6).

2. Remove the four screws (7) securing the main PCB

assembly.

3. Disconnect position motor wire connector CN504 from the

main PCB assembly.

4. Disconnect sensor PCB assembly wire connector CN601

from the main PCB assembly.

5. Remove the flexible ribbon wire from CN502 on the traverse

mechanism PCB assembly.
When re-installing the PC boards, refer to the reassembling
procedures for protecting switches, etc.

CN502

7 CN601

5

Fig. 10

7

7

Fig. 11

CN504

6

*Changer Mechanism Section

Sensor Assembly Unit

1. Remove the two screws (1) securing the sensor assembly

unit.

2. Unhook the springs on the back of the sensor assembly unit

from the holes on the chassis.

1

Sensor

Assembly

Magazine Lock Arm

1. Remove the magazine lock spring from the front side of the

chassis.

2. Remove the poly-washer (b) securing the magazine lock arm.

3. Turn the magazine lock arm in the direction of the arrow until

the notch is at the "C" position to remove it from the chassis.

Positioning Motor Assembly

1. Remove the two screws (2) securing the positioning motor.

2. Slightly lift the positioning motor assembly to remove it from

the two burrs on the chassis.

1

a

Fig. 14

Magazine Lock Spring

Rear

c

Fig. 15

Poly-Washer (b)

Fig. 16

2

Positioning

Motor Assembly

Rear Slider

1. Position the unit with the front section facing down. Rotate

the third gear located on the back of the main unit in the
direction of the arrow (clockwise).

2. Shift the rear slider in the direction of the arrow and remove it

at the rear slider mounting position (at the widest hole).

Front Slider

1. Position the unit with the rear section facing down. Rotate the

third gear located on the bottom of the unit in the direction of
the arrow (clockwise) until the front slider is shifted to the
outermost position.

2. Remove the E-washer securing the front slider to remove the

front slider from the chassis.

Can be removed at the stud position
(at the widest hole)

Shift

Fig. 17

Remove

Third Gear

Top Plate

1. Remove the nine screws (3) securing the top plate.

2. Disconnect the section (e) attached to the rear of the unit,

then lift the top plate slightly.

3. Slide the top plate toward the rear of the unit to remove the

upper rod from the top plate.

3

Slide

3

Top Plate

Rod

3

Remove the E-washer

Third gear

Slide and remove the rod inside

Fig. 18

3

Remove

Fig. 19

After Lifting

3

e

Fig. 20

Lifter Unit

1. Unhook the elevator spring located on the front side of the

unit.
(Be sure to first unhook the spring from the lifter side as
shown in the upper part of the diagram.)

2. Lift the lifter unit upward, then remove the lower rod to

remove the lifter unit from the chassis.

Lifter Bracket

1. Remove the two lifter bracket fixing screws (4) located on the

back of the lifter unit.

2. Remove the lower rod.

Side Bracket and Traverse Mechanism

1. Remove the two side bracket unit fixing screws (5) to

disconnect the side bracket unit from the lifter unit.

2. Remove the three shafts on the traverse mechanism

assembly from the lifter unit.

For reassembling, refer to the reassembling
procedures.

Fig. 21

Unhook this
part first

Proper

orientation

Lift up the lifter unit

Lower Rod

4

Fig. 22

4

Fig. 23

5

Remove from the

5

lifter unit

Fig. 24

Remove from the
lifter unit

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.

Pickup: Remove
after shorting

6

Feed Motor

Pickup Flexible PCB

CN501

Tray Motor Wire

6

Spindle Motor

Grounding Point

Fig. 25

Grounding Point

Feed Motor

Remove gears and
motors only when
required.

Fig. 26

Pickup Assembly

Middle Gear

7

8

Shaft Holder

Feed Slide Shaft Assembly

10

Chassis

Pull out

Rack Arm

9

Fig. 27

Tray Motor

1. Remove the two screws (11) securing the tray motor.

2. Remove the two screws (12) to remove the tray motor

assembly from the tray motor holder.

Separation of the Chassis L Assembly and
Chassis R Assembly

1. Remove the two screws (13) retaining the chassis "L" and

"R" assemblies.

2. Slide the chassis L assembly toward the front and detach it,

then remove the chassis "L" upward.

11

11

Fig. 28

Tray Motor

Slide and remove upward as
shown by the arrow

13

Tray Motor Assembly

Tray Motor Holder

12

Fig. 29

13

Front side

Fig. 30.

Precautions On Reassembling

When reassembling, also refer to the
disassembling procedures.

Pickup Assembly

Mounting the Traverse Mechanism

1. When mounting the pickup assembly, attach the feed slide

shaft assembly to the traverse chassis.

 Apply E-JC-525 grease to the shaft.

2. Mount the middle gear and the feed slide shaft to the traverse

chassis and secure them with the screw (14) through the
shaft holder.

3. Before mounting the mechanism PCB assembly, move the

pickup to the outer edge position, then secure the PCB
assembly using the screw (15).
At this time, check that the rest switch is correctly placed.

4. To mount the rack arm, first move the pickup to the middle

position and secure it with the screws (16).

Motor

Feed Motor

Fig. 31

Attached to chassis

14

Shaft Holder

Feed Slide Shaft (half
coated with grease)

Middle Gear

Chassis

Mounting the
Feed Motor Assembly

Mechanism PCB Assembly

15

15

Fig. 33

15

Shaft Holder

Spindle Motor

Fig. 32

16

Rack Arm

Move the pickup to the
middle position

Fig. 34

Mounting the Lifter unit

1. Insert the shafts (B) of the traverse mechanism assembly into

the slide grooves (F) on the lifter unit.

2. Shift the hook of the lifter unit to the edge, and shift the

sliding lever inside the side bracket unit to the edge as well.

3. With each hole and lever shifted to the edge, mount the lifter

unit and side bracket unit from the side.
(Check each attached section, and check that the two shafts
(C) of the lifter unit are correctly inserted into the holes (g) of
the side bracket unit. After mounting, check that the levers
move together. )

4. Turn the lifter unit upside down.

As shown in Fig. 37, slide the lever 30 mm away from the
edge, then mount the lifter bracket L assembly.

Attach

(C)

Fig. 35

(B)

(F)

(B)

(F)

(g)

(F)

(B)

Fig. 36

Fig. 37

Shift inside by approx. 30 mm

Expanded View

Connection of the Chassis "L" Assembly
and Chassis "R" Assembly

1. Attach the lower rod to the chassis "R" assembly. While

shifting the rod toward the front side, mount the rod on the
lifter unit.

 With the rod mounted, place the lifter unit on the chassis "R"

assembly.

2. Combine the chassis "L" and "R" assemblies so that the hook

section (h) of the chassis "L" assembly is inserted into the
notch of the chassis "R" assembly by sliding it from the front
side.

3. After engaging, secure with the two screws (18).

4. Attach the tension spring between the lifter unit and the

chassis.

Lower Rod

Fig. 38

Set last (lifter side)

18

h

Slide to engage

Notch

Attached

Fig. 39

i

Combine with R chassis

i

Set first
(chassis side)

Tension Spring

Proper
orientation

Fig. 40

Mounting the Top Plate

1. Mount the upper rod on the lifter side (j) and set it on the rear

of the top plate, then mount the other end of the upper rod to
(k).

2. Check that the five points (l, m, n, o and p) are correctly

positioned.
When mounting section (q), set it so that section (D) of the
lifter unit is pinched by the bending section of the top plate.

3. Secure the top plate with six fixing screws (19).

k

Upper Rod

Fig. 41

19

19

Expanded view of mounting "q"

(D)

Lifter Unit

Section "p"

Fig. 43

19

Fig. 42

p

l

m n

q

Fig. 44

Mounting the Front Slider and Rear Slider

1. Position the unit with the rear side facing down, then rotate

the third gear in the direction of the arrow (clockwise) until the
lift arm comes to the position at which the holes are exposed,
as shown in Fig. 45-1.

2. Mount the front slider from the top.

Rotate the third gear counterclockwise until the hole of the
slider is lined up with the right hole of the stud, as shown in
Fig. 45-2.

3. Mount the E-washer on the shaft.

4. Position the unit with the front side facing down, then mount

the rear slider. Check that the (r), (s) and (t) positions are
correctly mounted as shown in Fig. 46.

5. Rotate the third gear in the direction of the arrow

(counterclockwise) until the lifter unit is at the top position.

Check after mounting

Front Slider

E-Washer

Stud

Position so that the
stud and right hole
are lined up

Fig. 45-2

Rotate the third gear to
move the slider

Fig. 45-1

Fig. 45

Set so the holes
are exposed

Rotate until the

holes are lined up

r s t

Fig. 46

Rotate the third
gear to move the
slider