JVC HXZ-1 Service manual
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
HX-Z1
Tentative
HX-Z1
HX-Z1
Contents
Safety precautions
Preventing static electricity
Important for laser products
Importance administering
point on the safety
Disassembly method
S
1-2
1-3
1-4
1-5
1-6
COMPACT
DIGITAL AUDIO
E
M
D
N
O
U
D
O
E
S
E
E
R
T
P
M
U
L
O
V
Area Suffix
J ------------------------- U.S.A.
C ----------------------- Canada
Adjustment method
1-24
Flow of functional operation
until TOC read (CD)
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
1-29
1-30
1-30
1-31~41
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
No.21088
Jun. 2002
1-1
HX-Z1
1. This design of this product contains special hardware and many circuits and components specially for safety
purposes. For continued protection, no changes should be made to the original design unless authorized in
writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services
should be performed by qualified personnel only.
2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product
should not be made. Any design alterations or additions will void the manufacturer`s warranty and will further
relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special safety-related characteristics. These
characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily
be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in the Parts List of Service Manual. Electrical
components having such features are identified by shading on the schematics and by ( ) on the Parts List in
the Service Manual. The use of a substitute replacement which does not have the same safety characteristics
as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or
other hazards.
4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be
separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of
electric shock and fire hazard. When service is required, the original lead routing and dress should be
observed, and it should be confirmed that they have been returned to normal, after re-assembling.
5. Leakage currnet check (Electrical shock hazard testing)
After re-assembling the product, always perform an isolation check on the exposed metal parts of the product
(antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the
product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage
current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more
sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor
between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal part,
particularly any exposed metal part having a return path to
the chassis, and meausre the AC voltage across the resistor.
Now, reverse the plug in the AC outlet and repeat each
measurement. Voltage measured any must not exceed 0.75 V
AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).
0.15 F AC TYPE
1500 10W
Good earth ground
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
Place this
probe on
each exposed
metal part.
!
1. This equipment has been designed and manufactured to meet international safety standards.
2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
3. Repairs must be made in accordance with the relevant safety standards.
4. It is essential that safety critical components are replaced by approved parts.
5. If mains voltage selector is provided, check setting for local voltage.
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.
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the
parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " "
mark nearby are critical for safety.
(This regulation does not correspond to J and C version.)
1-2
HX-Z1
Preventing static electricity
1. Grounding to prevent damage by static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,
can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
2. About the earth processing for the destruction prevention by static electricity
In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of
the work environment.
Be careful to use proper grounding in the area where repairs are being performed.
2-1 Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over
it before placing the traverse unit (optical pickup) on it.
2-2 Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
3. Handling the optical pickup
1. In order to maintain quality during transport and before installation, both sides of the laser diode on the
replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power
source can easily destroy the laser diode.
4. Handling the traverse unit (optical pickup)
1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific
details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse
unit. Be careful not to take too long a time when attaching it to the connector.
3. Handle the flexible cable carefully as it may break when subjected to strong force.
4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for pick-up and how to
detach the CD traverse mechanism.
1. Remove the disk stopper and T. bracket on the CD changer mechanism
assembly.
2. Disconnect the harness from connector on the CD motor board.
3. CD traverse unit is put up as shown in Fig.1.
4. Solder is put up before the card wire is removed from connector CN601
on the CD servo control board as shown in Fig. 2.
(When the wire is removed without putting up solder, the CD pick-up
assembly might destroy.)
5. Please remove solder after connecting the card wire with CN601 when
you install picking up in the substrate.
CD changer
mechanism
assembly
CD traverse
unit
Flexible cable
Fig.1
Soldering
Fig.2
1-3
HX-Z1
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.
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.
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.
CAUTION
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
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
CLASS 1
LASER PRODUCT
1-4
Importance administering point on the safety
HX-Z1
Caution: For continued protection against risk of
fire, replace only with same type 2.5A/125V for
F103, 5A/125V for F001 and 6A/125V for F101, F102.
This symbolspecifies type of fast operating fuse.
Precaution: Pour evitisques de fer reux, remplacez
le fusible de surete de F103 comme le meme type
que 2.5A/125V, et 5A/125V pour F001 et 6A/125V
pour F101, F102.
Ce sont des fusibles suretes qui functionnes rapide.
^
1-5
Removing the CD Servo control board
(See Fig.1)
1.Remove the metal cover.
2.Remove the CD changer mechanism assembly.
3.From bottom side the CD changer mechanism assembly,
remove the four screws A retaining the CD servo control
board.
4.Absorb the four soldered positions "a" of the right and
left motors with a soldering absorber.
5.Pull out the earth wire on the CD changer mechanism
assembly.
6.Disconnect the connector CN854 on the CD servo
control board.
7.Disconnect the card wire CN601 and the connector
CN801 on the CD servo control board.
HX-Z1
A
a
a
CN854
A
CN651
CD servo control board
CN652
CN801
CN601
CN151
Removing the CD tray assembly
(See Fig.2~4)
Remove the front panel assembly.
1.
Remove the CD changer mechanism assembly.
2.
Remove the CD Servo control board.
3.
Remove the screw B' retaining the lod stopper.
4.
From the T.bracket section "b" and clamper base
5.
section "c" , remove both of the edges fixing the
rod(See Fig.2 and 3).
Remove the screw B retaining the disc stopper
6.
(See Fig.3).
Remove the three screws C retaining the T.bracket
7.
(See Fig.3).
Remove the screw D retaining the clamper assembly
8.
(See Fig.3).
From the left side face of the chassis assembly, remove
9.
the one screw E retaining both of the return spring and
lock lever(See Fig. 4).
10.
By removing the pawl at the section "d" fixing the return
spring, dismount the return spring(See Fig.4).
11.
Remove the three lock levers(See Fig.4).
T.Braket
Disc stopper
B
Earth
wire
Fig.1
A
Clamper base
A
b
Rod
c
T.Braket
Fig.2
d
CC
B'
a
Lod stopper
(C/J version only)
C
D
b
Lock lever
Clamper ass'y
Fig.3
Fig.4
Return spring
E
1-15
HX-Z1
11.
Check whether the lifter unit stopper has been caught
into the hole at the section "e" of CD tray assembly as
shown in Fig.5.
Make sure that the driver unit elevator is positioned as
12.
shown in Fig.6 from to the second or fifth hole on the
left side face of the CD changer mechanism assembly.
[Caution]
13.
14.
15.
Chassis assembly
In case the driver unit elevator is not at above
position, set the elevator to the position as
shown in Fig.7 by manually turning the pulley
gear as shown in Fig.8.
Manually turn the motor pulley in the clockwise
direction until the lifter unit stopper is lowered from the
section "e" of CD tray assembly(See Fig.8).
Pull out all of the three stages of CD tray assembly in
the arrow direction "f" until these stages stop
(See Fig.6).
At the position where the CD tray assembly has
stopped, pull out the CD tray assembly while pressing
the two pawls "g and g' " on the back side of CD tray
assembly(See Fig.9). In this case, it is easy to pull out
the assembly when it is pulled out first from the stage
CD tray assembly.
Stopper
e
CD tray
assembly
Fig.5
Refer to Fig.7
Pulley gear
Pawl
Fig.6
CD tray assembly
g
CD
CD
CD
f
Drive unit of elevator
Fig.7
3
2
1
CD tray assembly
1-16
Motor pulley
Fig.8
Pawl ,
g
Fig.9
g'
HX-Z1
Removing the CD loading mechanism
assembly(See Fig.10)
1.2.While turning the cams R1 and R2 assembly in the
arrow direction "h" ,align the shaft "i" of the CD loading
mechanism assembly to the position shown in Fig.10.
Remove the four screws F retaining the CD loading
mechanism assembly.
Removing the CD traverse mechanism
(See Fig.11 and 12 )
For dismounting only the CD traverse mechanism
1.
without removing the CD loading mechanism assembly,
align the shaft "j" of the CD loading mechanism
assembly to the position shown Fig.11 while turning the
cam R1 and R2 assembly in the arrow direction "k" .
By raising the CD loading mechanism assembly in the
2.
arrow direction "l", remove the assembly from the lifter
unit
Cam R1, R2 assembly
Cams R1, R2 assembly
Arrow
h
i
F
F
CD loading mechanism assembly
Fig.10
F
F
CD traverse mechanism
Arrow
k
j
Fig.11
Removing the CD pick unit
(See Fig.13 )
1.
Move the cam gear in the arrow direction "m" . Then,
the CD pickup unit will be moved in the arrow direction
"n" .
According to the above step, shift the CD pickup unit to
2.
the center position.
While pressing the stopper retaining the shaft in the
3.
arrow direction "o" , pull out the shaft in the arrow
direction "p".
After dismounting the shaft from the CD pickup unit,
4.
remove the CD pickup unit
Lifter unit
o
Stopper
Shaft
Fig.12
CD Pickup unit
n
m
Shaft
p
Stopper
Fig.13
Arrow
CD loading
mechanism
Shaft
Cam gear
l
1-17
HX-Z1
Removing the try select switch board
(See Fig.14)
1.2.Remove the two screws G retaining the tray select
switch board.
Disconnect the tray select switch board from connector
CN804 on the CD servo control board.
Removing the cam unit
(See Fig.15 ~17 )
1.
Remove the CD loading mechanism assembly.
2.
While turning the cam gear "q", align the Paul "r"
position of the drive unit to the notch position(Fig.16) on
the cam gear "q".
Pull out the drive unit and cylinder gear(See Fig.17).
3.
While turning the cam gear "q", align the Paul "s"
4.
position of the select lever to the notch position(Fig.18)
on the cam gear "q".
Remove the four screws H retaining the cam unit(cam
5.
gear "q" and cams R1/R2 assembly)(See Fig.18).
Chassis assembly
Drive unit
CN851
CN854
Fig.14
Cam gear
Tray select
switch board
CN804
q
G
Drive unit
Cylinder gear
r
Cam gear
H
s
Fig.15
H
q
Cams R1, R2 assembly
Cam unit
J
1-18
Fig.16
Select lever
Fig.17
HX-Z1
Fig.18
Fig.20
Fig.19
Fig.21
[Note]
When the chassis assembly is turned over under
the conditions wherein the gear bracket and belt
have been removed, then the pulley gear as well
as the gear, etc. constituting the gear unit can
possibly be separated to pieces. In such a case,
assemble these parts by referring to the assembly
and configuration diagram in Fig. 21.
Removing the actuator motor and belt
(See Fig.18~21)
1.
2.
3.
4.
5.
Remove the two screws I retaining the gear bracket
(See Fig.18).
While pressing the pawl "t" fixing the gear bracket in the
arrow direction, remove the gear bracket
(See Fig.18).
From the notch "u section" on the chassis assembly
fixing the edge of gear bracket, remove and take out the
gear bracket(See Fig. 19).
Remove the belts respectively from the right and left
actuator motor pulleys and pulley gears(See Fig. 18).
After turning over the chassis assembly, remove the
actuator motor while spreading the four pawls "v" fixing
the right and left actuator motors in the arrow
direction(See Fig. 20).
Pulley gear
Belt
Motor pulley
Belt
Pulley gear
Motor pulley
Gear bracket
t
I
I
Pawl
v
Actuator motor
v
Chassis assembly
u
Gear bracket
Pulley gear
Gear B
Cylinder gear
Gross gear U
Gear C
Gross gear L
Select gear
Gear B
Gear C
Pulley gear
Assembly and Configuration Diagram
1-19
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