JVC CH-X1000RF User manual

SERVICE MANUAL
No.49594
Feb. 2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
This service manual is printed on 100% recycled paper.
CH-X1000 /X000RF
CH-X1000 / CH-X1000RF
Contents
Safety precaution
Important for laser products
Location of main parts
Removal of main parts
Pickup replacement procedure
JC 12 Forced eject procedures
1-2
1-3
1-4
1-5
1-20
Troubleshooting
Wiring connections
Description of major ICs
1-21
1-27
1-28
CH-X1000RF is a combination of CH-X1000 and KS-RF37.
KS-RF37 is a combination of Remote control and the RF unit.
KS-RF37
CH-X1000
Area Suffix
J Northern America
1-18
COMPACT DISC AUTOMATIC CHANGER

!Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
Safety precaution
!Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
1‑2

Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The compact disc player uses invisible
laserradiation and is equipped with safety switches
whichprevent emission of radiation when the drawer is
open and the safety interlocks have failed or are de
feated. It is dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
VARNING : Osynlig laserstrålning är denna del är öppnad
och spårren är urkopplad. Betrakta ej strålen.
VARO : Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle lasersäteilylle.Älä katso
säteeseen.
ADVARSEL : Usynlig laserstråling ved åbning , når
sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.
ADVARSEL : Usynlig laserstråling ved åpning,når
sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
DANGER : Invisibie laser radiation
when open and interlock or
defeated.
AVOID DIRECT EXPOSURE TO
BEAM (e)
VARNING : Osynlig laserstrålning är
denna del är öppnad och spårren är
urkopplad. Betrakta ej strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettaessa olet alttiina
näkymättömälle lasersäteilylle.Älä
katso säteeseen. (d)
ADVARSEL :Usynlig laserstråling
ved åbning , når
sikkerhedsafbrydere er ude af
funktion. Undgå udsættelse for
stråling. (f)
!
CAUTION
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
Caution.
This production
contains laser
component
of higher laser class
than Class 1.
Top panel of the unit
Gerateoberseite
Panneau superieur de l"appereil
1-3

Location of main parts
Bottom view
Top side view
Remove the main board view
Main board ass'y Mechanism ass'y wire
Jack board ass'y
Mechanism board ass'ySensor board ass'y
Positioning
motor ass'y
Mechanism &
lifter unit
Positioning
motor ass'y
Feed motor
Spindle motor
Tray motorSensor board ass'y
Third gear
Magazine house
section
1‑3

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.
Remove 1-a and
turn in the direction
of the arrow.
Fig. 1
Fig. 2
Fig. 3 Fig. 4
Exterior Section
Removing the Bottom Cover and Front Panel
Assembly 11
111-a
11
1
11-a
Remove 1-a and
turn in the
direction of the
arrow
Unhook catches
Unhook catches
The front panel can be
separated by raising the
cover.
Slightly lift the
jack section to
remove.
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.)
Removal of Main Parts
1‑4

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. Fig. 5
Fig 6
Fig. 6-1
Fig. 7
Fig. 8
Fig. 8-1
Fig. 9
Apply alcohol to the shaft then
immediately attach the damper. (After
attaching, check that the shaft is
correctly inserted.)
Push out with your
finger before
attaching
Turn to the top position (at a right angle),
then push down to lift off.
Lift the changer unit upward
How to Attach the Damper Springs
Silver
(mechanism side) Black
(magazine side)
Mechanism
Chassis
Remove the flexible ribbon
wire if required
2
2
2
2
4
4
3
1‑5

Fig. 14
Fig. 15
Fig. 16
Sensor
Assembly
1
1
a
Rear
Magazine Lock Spring
Poly-Washer (b)
c
Positioning
Motor Assembly
2
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.
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.
1‑6

Can be removed at the stud position
(at the widest hole) Remove
Shift
Third Gear
Fig. 17
Fig. 18
Fig. 19
Fig. 20
Remove the E-washer
Third gear
Slide and remove the rod inside
Slide
Rod
Top Plate
Remove
After Lifting
3
3
3
3
3
e
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.
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.
1‑7

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
Fig. 22
Fig. 23
Fig. 24
Unhook this
part first
Proper
orientation
Lift up the lifter unit
Lower Rod
Remove from the
lifter unit
Remove from the
lifter unit
5
5
4
4
1‑8

Fig. 25
Fig. 26
Fig. 27
Pickup Flexible PCB
Pickup: Remove
after shorting Tray Motor Wire
CN501
Feed Motor
Spindle Motor
Grounding Point
Grounding Point
6
6
Pickup Assembly
Shaft Holder
Feed Slide Shaft Assembly
Middle Gear
Feed Motor
Remove gears and
motors only when
required.
Rack Arm Pull out
10
9
8
7
Chassis
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.
1‑9

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.
Fig. 28
Fig. 29
Fig. 30.
Tray Motor Assembly
Tray Motor
Tray Motor Holder
Slide and remove upward as
shown by the arrow
Front side
11 11
12
13
13
1‑10

Precautions On Reassembling
When reassembling, also refer to the
disassembling procedures.
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).
Fig. 34
Fig. 33
Fig. 32
Fig. 31
Pickup Assembly
Attached to chassis
Shaft Holder
Feed Slide Shaft (half
coated with grease)
Middle Gear
Motor
Chassis
Mounting the
Feed Motor Assembly
Feed Motor
Shaft Holder Spindle Motor
Mechanism PCB Assembly Rack Arm
Move the pickup to the
middle position
15
15
15
16
14
1‑11

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.
Fig. 35
Fig. 36
Fig. 37
(B)
(B)
(B)
(C)
Attach
Shift inside by approx. 30 mm
Expanded View
(g)
(F)
(F)
(F)
1‑12

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.
Fig. 38
Fig. 39
Fig. 40
Lower Rod
Notch Attached
Slide to engage
Combine with R chassis
Set last (lifter side)
Proper
orientation
Tension Spring
Set first
(chassis side)
18
h
i
i
1‑13

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).
Fig. 41
Fig. 42
Fig. 43
Fig. 44
lmn q
p
Upper Rod
(D)
Lifter Unit
Section "p"
Expanded view of mounting "q"
19
19
19
k
1‑14

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.
Fig. 45-1
Fig. 45
Fig. 45-2
Fig. 46
Stud
E-Washer
Front Slider
Check after mounting
Rotate the third gear to
move the slider
Rotate until the
holes are lined up
Set so the holes
are exposed
Position so that the
stud and right hole
are lined up
Rotate the third
gear to move the
slider
rst
1‑15

Mounting the Sensor PCB Assembly
1. Attach the longer spring to the white resin, and attach the
shorter spring temporarily to the sensor assembly bracket.
2. Mount the sensor assembly so that the shaft of the lift arm is
inserted into the longer hole on the white resin located on the
back of the sensor PCB assembly.
3. Attach the shorter spring to the hook of the lift arm.
Mounting the Main PC Board Assembly
1. Rotate the third gear clockwise until section (E) of the front
slider and the third hole from the right are lined up.
(Be sure to set properly. If incorrectly set, the switches on the
PCB assembly may be damaged.)
2. After they are correctly positioned, mount the main PCB
assembly.
Fig. 47
Fig. 48
Sensor assembly fixing screws
Shorter
spring
Shorter
spring Longer
spring
Attach
temporarily
(E)
Position so that the slider hole and third hole
from the right are lined up
1‑16

1
Third Gear
Main PCB
Assembly
Feed Motor
Assembly
1
2
2
2
3
CN502
CN501
Unsolder
Lifter Bracket (L)
Fig. 49
Fig. 50
Tray Motor
Assembly
Unsolder
Traverse
Mechanism
PCB Assembly
Grounding Point
Fig. 51
Pickup Assembly
Shaft Holder
Spindle Motor
Pickup Replacement Procedure
Note: When replacing the pickup, be sure to
apply countermeasures against static
electricity (grounding the operation table,
wrist band and soldering iron). To remove
it, first short-circuit the grounding point on
the mechanism PCB, then lift the
mechanism PCB assembly with CN501
connected. Next, short-circuit the
grounding point on the pickup main unit,
then unplug the pickup flexible PCB from
connector CN501.
When reassembling, perform in the reverse order.
1. Remove the bottom cover, front panel and top cover
from the exterior section.
2. Unplug the flexible ribbon wire from connector CN502
on the traverse mechanism PC board assembly.
3.Turn the rear slider and third gear in the lifter section
counterclockwise until the traverse mechanism
assembly is in the lowermost (bottom) position.
4. Unsolder the two wires (black and brown) connected
to the tray motor.
5. Remove the two screws (1) from the round holes on
the chassis R assembly to remove the lifter bracket
(L).
6. Remove the lower rod.
7. Short-circuit the grounding point on the traverse
mechanism PCB assembly of the lifter unit. Unsolder
the wires connected to the spindle motor (red, black)
and to the feed motor (blue, white) to lift the PCB
assembly.
Next, short-circuit the grounding point on the pickup
main unit and unplug the pickup flexible PCB from
CN501.
8. Remove the three fixing screws (2) from the round
holes on the chassis R assembly to remove the
traverse mechanism PCB assembly.
9. Remove the pickup shaft holder fixing screw (3) to
remove the pickup assembly.
1‑17

Shift approx. 30 mm
Shift approx. 30 mm
Fig. 52
Grounding Point
Pickup
Feed Slide Shaft
Rack Arm
5
4
Shaft Holder
Middle Gear
3
Fig. 53
Fig. 54
Lifter Unit Lever
Enlarged
Diagram
10. Remove the two rack arm fixing screws (4).
Pull out the feed slide shaft.
Remove the shaft holder fixing screw (5).
11.When mounting the lifter bracket after replacing the pickup,
shift the lifter unit lever approx. 30 mm towards the inside,
then mount the lifter bracket.
1‑18

JC12 Forced eject procedures
Magazine eject does not function.
Completed
Completed
Press the magazine lock lever to
eject the magazine.
Rotate the third gear clockwise
until the lifter level is below the 9th
tray position.
Place the unit with its left side
facing down and apply a slight
shock, then return the tray to the
magazine.
Disconnect the tray from the hook.
Rotate the third gear clockwise and
unchuck the disc.
Remove the dampers and the top
cover to take out the mechanism.
Remove the item(s) causing the
disc-jam through the clearance at
the top of the lifter.
Remove the lifter bracket (L) and
return the tray to the magazine.
RESET (Press EJECT for 3 sec.) Completed
YES
YES
YES
NO
NO
NO
Remove the bottom cover
Is the disc set in the playing
position?
Are trays stored in
the magazine?
Check visually.
Improperly positioned
Peel off the sticker on the left side
of the unit. Insert a screwdriver
and press the internal lever to
forcibly eject the magazine.
Check that the trays remain no more
than 10 mm inside the magazine.
1‑19