JVC HX-Z10 User manual

SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED No.MB014
2003/9
COMPACT COMPONENT SYSTEM
MB01420037HX-Z10
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37
5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-41
B -------------------------- U.K.
E ------ Continental Europe
EN ------- Northern Europe
Area Suffix

1-2 (No.MB014)
SPECIFICATION
CA-HXZ10
SP-HXZ10
Design and specifications are subject to change without notice.
Amplifier section Output Power (IEC 268-3)
Subwoofer 125 W per channel, min. RMS, driven into 6 Ωat 63 Hz with no more than
10% total harmonic distortion.
Main Speaker 35 W per channel, min. RMS, driven into 6 Ωat 1 kHz with no more than 10%
total harmonic distortion.
Audio input sensitivity/impedance (Measured at 1 kHz, with tape recording signal 300 mV)
AUX 300 mV/47 kΩ
Speakers/impedance Subwoofer 6 Ω- 16 Ω
Main Speaker 6 Ω- 16 Ω
Tuner FM tuning range 87.50 MHz - 108.00 MHz
AM tuning range 522 kHz - 1 629 kHz
CD player Disc capacity 5 discs
Dynamic range 87 dB
Signal-to-noise ratio 90 dB
Wow and flutter Immeasurable
MP3 recording format MPEG 1/2 Audio Layer 3
Max. Bit rate 320 kbps
Cassette deck Frequency response Normal (type I) 50 Hz - 14 000 Hz
Wow and flutter 0.15% (WRMS)
General Power requirement AC 230 V , 50 Hz
Power consumption 165 W (in operation)
27 W (on standby with Ecology Mode off)
1.2 W (on standby with Ecology Mode on)
Dimensions (approx.) 205 mm ×370 mm ×380.5 mm (W/H/D)
Mass (approx.) 10.5 kg
Type 3-way 4-speaker Bass-Reflex Type Twin Hyper Power-Drive Subwoofer and Front Twin
Woofer
Speakers Subwoofer 16.0 cm (6-5/16 in.) cone ×1
Main woofer 10.0 cm (3-15/16 in.) cone ×2
Tweeter 5.0 cm (2 in.) cone ×1
Power Handling Capacity Subwoofer 165 W
Main Speaker 75 W
Impedance Subwoofer 6 Ω
Main Speaker 6 Ω
Frequency Range Subwoofer 30 Hz ~ 325 Hz
Main Speaker 70 Hz ~ 32 000 Hz
Sound Pressure Level 78 dB/W·m
Subwoofer 86 dB/W·m
Main Speaker 220 mm ×432 mm ×357 mm
Dimensions (W ×H ×D) 8-11/16 in. ×17-1/16 in. ×14-1/16 in.)
Mass 8.2 kg (18.1 lbs) each

(No.MB014)1-5
1.6 Preventing 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.
1.6.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.
Be careful to use proper grounding in the area where repairs are being performed.
(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) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• 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.)
• 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.
1.7 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) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.8 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the CD pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connector CN231 on the CD servo board.
(If the flexible wire is disconnected without applying solder, the CD pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Front panel assembly
Primary board
CN231
Band
a

(No.MB014)1-7
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the metal cover
(See Fig.1~3)
(1) Remove the six screws Aon the back of the body.
(2) Remove the screw Bon each side of the body.
(3) Remove the metal cover from the body by lifting the rear
part of the cover.
CAUTION:
Do not break the front panel tab fitted to the metal cover.
Fig.1
Fig.2
Fig.3
A
AA
Metal cover
Metal cover
B
Metal cover
B

1-8 (No.MB014)
3.1.2 Removing the CD changer mechanism assembly
(See Fig.4, 5)
• Prior to performing the following procedure, remove the metal
cover.
(1) Disconnect the card wire from connector CN651 on the CD
servo control board on the right bottom of the CD changer
mechanism assembly.
(2) Remove the four screws Cattaching the CD changer
mechanism assembly on top of the body.
(3) Remove the CD changer mechanism assembly while lifting
the rear part.
CAUTION:
Do not damage the CD fitting when removing the CD changer
mechanism assembly.
Fig.4
Fig.5
CD changer mechanism assembly
CD servo control board
CN651
Front panel assemby
CD changer
mechanism assembly
CC

(No.MB014)1-9
3.1.3 Removing the front panel assembly
(See Fig.6~9)
• Prior to performing the following procedure, remove the metal
cover and the CD changer mechanism assembly.
(1) Disconnect the card wires from connector CN44 and
CN870 on the main board on the right side of the body.
(2) Disconnect the wire from connector CN701 on the bridge
board.
(3) Cut the band.
(4) Disconnect the wire from connector CN231,CN232 on the
primary board on the left side of the body and remove the
band fixing the wire.
(5) Disconnect the ground wire extending from phones board
from bottom chassis.
(6) Remove the three screws Dattaching the front panel as-
sembly at the bottom of the body.
(7) Release the two joints a on the lower left and right sides of
the front panel assembly using a screwdriver, and remove
the front panel assembly toward the front.
REFERENCE:
Front panel need to be tilt a little bit as release from bottom
chassis.
Fig.6
Fig.7
Fig.8
Fig.9
Front panel assembly
Bridge board
CN701
Main board
CN870
CN44
a
Front panel assembly
Primary board
CN231,CN232
Band
a
Ground wire
Band
Primary board
CN231,CN232
Front panel assembly
Front panel aeembly
D

1-10 (No.MB014)
3.1.4 Removing the tuner pack assembly
(See Fig.10, 11)
• Prior to performing the following procedure, remove the metal
cover and the CD changer mechanism assembly.
(1) Disconnect the card wire from connector CN1 on the tuner
pack assembly on the right side of the body.
(2) Remove the two screws Eon the rear panel on the back of
the body.
Fig.10
Fig.11
Tuner pack assembly
CN1
ERear panel

(No.MB014)1-11
3.1.5 Removing the rear panel
(See Fig.10, 12~16)
• Prior to performing the following procedure, remove the metal
cover and the CD changer mechanism assembly.
(1) Remove holding board by remove a plastic rivet and then
slide out the holding board as shown in fig. 12.
(2) Disconnect the fan wire extending from the fan assembly
from connector CN206 on the bridge board.
(3) Disconnect the card wire from connector CN1 on the tuner
pack.
(4) Remove four screws Ffrom rear panel.
(5) Release joints bwhich on right bottom and left bottom of
rear panel. The joint can be release by pull outward the
side of rear panel.
REFERENCE:
Fan assembly and tuner pack will come off with rear panel.
Fig.12
Fig.13
Fig.14
Fig.15
Fig.16
Plastic rivet
Holding board
Rear panel
Bridge board
CN206
Fan assembly
FF
F
Rear panel
Rear panel
b
Rear panel
b

1-12 (No.MB014)
3.1.6 Rmoving the fan assembly
(See Fig.17, 18)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and the rear pan-
el.
(1) Cut the band with for fan wire holder.
(2) Remove two screws Gon the rear panel.
(3) Rotate fan assembly in clockwise direction to release fan
assembly from rear panel (joints c).
Fig.17
Fig.18
3.1.7 Removing the main board
(See Fig.19)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and the rear pan-
el.
(1) Cut off the band.
(2) Disconnect the card wires from connector CN44 and
CN870 on the main board.
(3) Remove the screw Hattaching the main board.
(4) Disconnect connector CN217 and CN311 on the main
board outward and release from the base chassis (joint d)
upward.
Fig.19
G
Rear panel
c
cFan assembly
Band
CN870
CN44 CN311
Main board
CN217
Band
Hd

(No.MB014)1-13
3.1.8 Removing the bridge board / regulator board / heat sink
(See Fig.20~23)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly, the rear panel
and main board.
(1) Disconnect the wire from connector CN212, CN213 and
CN214 on the primary board respectively and remove the
band attaching the wires.
(2) Disconnect the wire from connector CN701 on the bridge
board.
(3) Disconnect the ground wire extending from the bridge
board from bottom chassis
(4) Remove the two screws Iattaching the heat sink bracket
and move the heat sink in the direction of the arrow to re-
lease from the base chassis. The bridge board and the reg-
ulator board come off with the heat sink.
(5) Remove the two screws Jattaching the heat sink bracket.
(6) Remove the two screws M, detach bridge board from reg-
ulator board by disconnect connector CN205.
(7) Remove the two screws Kand two screws Lto detach
regulator board from heat sink.
CAUTION:
As assembly back the regulator board and bridge board to
heat sink.
Regulator board must be assembly to heat sink first and
screws Kand Lmust be screwed before bridge board attach
to regulator board.
Fig.20
Fig.21
Fig.22
Fig.23
Band
CN212
Primary board
CN213
CN214
CN701
Bridge board
Bridge board
Ground wire
Regulator board
Heat sink
I
IHeat sink bracket
J
Heat sink
Bridge board
Regulator board
Heat sink bracket
Heat sink bracket
Heat sink
Regulator board
Bridge board
CN215
CN205
L
K
ML

1-14 (No.MB014)
3.1.9 Removing the power transformer assembly
(See Fig 24, 25)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly, the rear panel,
the main board and the bridge board / regulator board.
(1) Remove the screw Nattaching the primary board.
(2) Disconnect the wire from connector CN231 on the primary
board.
(3) Remove the four screws Oattaching the power transform-
er assembly.
(4) Detach the cord stopper from the base chassis upward.
REFERENCE:
When disconnecting the power cord from connector CN250 on
the primary board, remove the fixing band.
Fig.24
Fig.25
3.1.10 Front panel assembly
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and the front
panel assembly.
3.1.11 Removing the cassette mechanism assembly
(See Fig.26)
(1) Disconnect the card wire from connector CN33 on the head
amplifier & mechanism control board.
(2) Remove the two screws P, and the two screws Qattach-
ing the cassette mechanism assembly.
3.1.12 Removing the headphone board
(See Fig.26)
(1) Remove the screw Rand pull out the headphone board
backward.
(2) Cut off the band.
Fig.26
Power transformer
assembly
Primary board
N
Primary board
CN231
CN250
Cord stopper
FIxing band
Power transformer
assembly
O
O
Head amplifier &
mechanism control board
CN33
Headphone board
PQ
QR
Band

(No.MB014)1-15
3.1.13 Rmoving the switch / micon board
(See Fig.27~29)
• Prior to performing the following procedure, disconnect the
card wire from CN43 on the micon board.
(1) Disconnect the card wire from connector CN840 on the mi-
con board.
(2) Remove the fifteen screws Sattaching the switch / micon
board.
(3) Remove the spacer fixing the wire.
(4) Move the switch /micon board in the direction of the arrow
to disconnect the wire from connector CN880 and CN900
on the micon board.
Fig.27
Fig.28
Fig.29
S
S
S
S
CN43
Micon board
CN840
Switch board
Spacer
Spacer
Switch board
CN880
Switch board
CN900
Micon board
CN43
CN840

1-16 (No.MB014)
3.1.14 Removing the FL board assembly
(See Fig.30, 31)
• Prior to performing the following procedure, remove the switch
/ micon board.
(1) Remove the five screws Tattaching the stay bracket (1).
(2) Remove the three screws Uattaching the FL board as-
sembly.
Fig.30
Fig.31
T
Stay bracket (1)
U
UU
FL board assembly

(No.MB014)1-17
3.1.15 Removing the button board
(See Fig.32~34)
• Prior to performing the following procedure, remove the switch
/micon board.
(1) Pull out the preset knob, the volume knob and the sound
mode knob.
(2) Remove the two screws Vattaching the knob holder. Re-
move the nut from the front panel.
(3) Remove the eleven screws Wattaching the button board.
Fig.32
Fig.33
Fig.34
Preset knob
Volume knob
Sound mode knob
V
Knob holder
Nut

1-18 (No.MB014)
3.2 CD changer mechanism
3.2.1 Removing the tray assembly
(See Fig.1 ~ 5)
(1) Remove the two screws Afrom the top cover and release
the two joints aon both sides of the body.
(2) Remove the top cover with the two rods attached to the top
cover and lifter assembly respectively.
(3) Remove the open det lever on the left side of the body.
(4) Push part b of the slide (R) assembly on the right side of
the body to unlock the tray assembly. Draw out the trays to-
ward the front.
Attention:
The tray can be locked if all tray assemblies are at-
tached.
(5) From top of the body, move the stopper tab c in the direc-
tion of the arrow and release. Pull out the tray assemblies
from the body.
Caution:
Remove the tray assembly from top tray 5 in order.
Attention:
When reattaching the sub tray of the tray assembly, or when
removing the CD remaining inside, refer to another section.
Fig.1
Fig.2
Fig.3
Fig.4
Fig.5
Top cover
Lifter assembly
Rod
A
a
a
A
aRod Top cover
Lifter assembly
a
Open det leve
r
b
Tray assembly
(Tray 5)
c

(No.MB014)1-19
3.2.2 Removing the servo control board
(See Fig.6 ~ 9)
Caution:
Solder the short-circuit point on the pickup before disconnect-
ing the card wire extending from the pickup. If you do not follow
this instruction, the pickup may be damaged.
(1) Disconnect the card wire from connector CN251 and each
wire from connector CN252, CN253 and CN602 on the ser-
vo control board on the bottom of the body. Disconnect the
wire from joint d.
(2) Solder the short round point on the flexible board of the pick
up.
(3) Remove the four screws Band turn the servo control board
as shown in the figure.
(4) Disconnect the card wire from connector CN601 on the
servo control board.Caution: Unsolder the short-circuit
point after reassembling.
Caution:
When reassembling, twist the wires to be connected to con-
nector CN252 and CN253 twice.
3.2.3 Removing the switch board
(See Fig.9)
(1) Disconnect the wires from connector CN252 and CN253
on the servo control board.
(2) Remove the screw Cattaching the switch board.
(3) Release the wires from the slot e of the switch board.
Caution:
When reassembling, let the wires through the slot eof the
switch board and twist them twice.
Fig.6
Fig.7
Fig.8
Fig.9
B
B
B
d
CN602
CN251
Switch board
Servo control board
CN252
CN253
Pickup
Flexible board
Short round
Card wire
CN601
Servo control board
Card wire
CN252
e
C
Servo control board
CN253
Switch board

1-20 (No.MB014)
3.2.4 Removing the motor board
(See Fig.10 , 11)
• Prior to performing the following procedure, remove the servo
control board.
(1) Turn over the body and remove the two screws D. Move
the CD module bkt. in the direction of the arrow to release
two joints f.
(2) Unsolder the four soldered parts on the motor of the motor
board.
Caution:
If removing the motor board with the motor, you should
remove the screws attaching the motor from top of the
body(Refer to another section).
(3) Remove the two screws Eattaching the motor board.
(4) Remove the spacer fixing the motor board and tray switch
board, and disconnect connector CN2 on the motor board.
(5) Disconnect the card wire from connector CN1 on the motor
board.
Caution:
When reconnecting the card wire, let the card wire through the
slot g of the motor board and attach it to the bottom of the body
using a double tape.
Fig.10
Fig.11
DD
f
CD Module
braket
f
E
g
CN2
Spacer
Card wire
Double
face tape
Motor
Soldering point
CN1
E

(No.MB014)1-21
3.2.5 Removing the CD tramecha assembly
(See Fig.12)
• Prior to performing the following procedure, remove the servo
control board.
(1) Turn over the body and remove the three screws Fattach-
ing the tramecha.
Fig.12
F
CD Tramecha assembly
F
F

1-22 (No.MB014)
3.2.6 Removing the pickup
(See Fig.13 , 14)
• Prior to performing the following procedure, remove the servo
control board and CD tramecha assembly.
(1) From top of the CD tramecha assembly, turn the cam gear
in the direction of the arrow to move the pickup assembly
outward.
(2) Push down the stopper hin the direction of the arrow and
pull out the shaft.
(3) Release the joint iof the pickup assembly and mecha
base.
(4) Remove the screw Gattaching the CD rack. Release the
four tabs jat the bottom of the CD rack.
Fig.13
Fig.14
h
iPickup assembly
Mecha base
Shaft
ShaftShaft
Cam gear
Stopper
Stopper
CD lack
Pickup
G
j
j
j

(No.MB014)1-23
3.2.7 Removing the side (L)/ tray switch board
(See Fig.15 ~ 17)
• Prior to performing the following procedure, remove the tray
assembly.
(1) Remove the two screws Hattaching the side (L) on top of
the body.
(2) From the side of the body, remove the spacer fixing the tray
switch board and motor board. Disconnect connector CN3
on the tray switch board and detach the side (L) upward.
(3) Remove the screw Jattaching the tray switch board.
(4) Push the joint tab kof the side (L) in the direction of the ar-
row and remove the tray switch board outward, then re-
lease joint l.
Fig.15
Fig.16
Fig.17
H
H
Side (L)
CN3
Spacer
Side (L)
H
H
k
l
J
Side (L)
Tray switch board