JVC HX-Z7V Service Manual
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
2203520036
HX-Z7V
COMPACT
DIGITAL VIDEO
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COMPACT
DIGITAL VIDEO
CA-HXZ7V
Area Suffix
US ------------ Singapore
TABLE OF CONTENTS
1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-39
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.22035
2003/6
SPECIFICATION
Amplifier section Output Power (IEC 268-3) MAIN SPEAKERS 100 W per channel, min. RMS, both
channels driven into 6 Ω at 1kHz with no
more than 0.9% total harmonic distortion.
Audio input sensitivity/Impedance (Measured at 1 kHz, with tape recording signal 300 mV)
AUX 390 mV/50 kΩ
MIX 1/2 1.5 mV/5 kΩ
Speakers/Impedance MAIN SPEAKERS 6 Ω - 16 Ω
SURROUND SPEAKERS 16 Ω - 32 Ω
Tuner FM tuning range 87.50 MHz - 108.00 MHz
AM tuning range At 9 kHz intervals 531 kHz - 1 710 kHz
At 10 kHz intervals 530 kHz - 1 710 kHz
CD player CD capacity 3 CDs
Dynamic range 85 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 110 V / AC 127 V / AC 220 V /AC 230 V - AC 240 V (adjustable with
the voltage selector), 50 Hz / 60 Hz
Power consumption 185 W (in operation) 25 W (on standby with Ecology Mode off)
Less than 3.5 W (on standby with Ecology Mode on)
Dimensions (approx.) 205 mm × 370 mm × 370 mm (W/H/D)
Mass (approx.) 10.0 kg
Design and specifications are subject to change without notice.
1-2 (No.22035)
1.1 Safety Precautions
Good earth ground
d
AC VOLTMETER
SECTION 1
Precautions
(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 manufacturers 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 reassembling.
(5) Leakage shock hazard testing
After reassembling 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
in the following manner. Connect a 1,500
paralleled by a 0.15
exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
Ω per volt or more sensitivity
Ω 10W resistor
µF AC-type capacitor between an
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure 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.).
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
1.2 Warning
(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.
1.3 Caution
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.
1.4 Critical parts for safety
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. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
each expose
metal part.
(No.22035)1-3
µ
1.5 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.
1.5.1 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.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron palate
(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.
1.6 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.
1.7 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 CN101 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.
1-4 (No.22035)
CD traverse
mechanism unit
Flexible cable
Fig.1
Soldering
Fig.2
SECTION 2
AA
Disassembly method
2.1 Main body
2.1.1 Removing the metal cover
(See Fig.1~3)
(1) Remove the six screws A on the back of the body.
(2) Remove the screw B on 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.
Metal cover
A
Metal cover
B
Fig.2
Metal cover
Fig.1
B
Fig.3
(No.22035)1-5
2.1.2 Removing the CD changer mechanism assembly
(See Fig.4, 5)
• Prior to performing the following procedure, remove the metal
cover.
(1) Disconnect the card wires from connector CN151 and
CN651 on the CD servo control board on the right bottom
of the CD changer mechanism assembly.
(2) Remove the four screws C attaching 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.
CD changer
mechanism assembly
Front panel assembly
C
CD servo control board
CN651
Fig.4
CN151
C
1-6 (No.22035)
CD changer mechanism assembly
Fig.5
2.1.3 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, disconnect the flat wire from connector CN922 on
the main board on the right side of the body. Remove the
screw D attaching the wire from extending from the underside of the front panel assembly.
(2) Disconnect the wire from connector CN701 on the bridge
board.
(3) Cut the band.
(4) Disconnect the wires from connector CN231 and CN232
on the primary board on the left side of the body.
(5) Remove the plastic rivet attaching the inner bar in the cen-
ter of the front panel assembly.
REFERENCE:
Keep the plastic rivet for reuse.
(6) Remove the three screws E attaching the front panel as-
sembly at the bottom of the body.
(7) Disconnect the ground wire extending from the phone
board from bottom chassis.
(8) 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 little bit as release from bottom
chassis.
Bottom chassis
Inner bar
Plastic rivet
Joint a
Ground wire
Fig.7
Front panel assembly
Front panel assembly
Joint a
Bridge board
CN701
D
Fig.6
Main board
CN870
CN922CN44
Bridge board
CN701
Primary board
CN231,CN232
Band
Fig.8
E
Fig.9
(No.22035)1-7
2.1.4 Removing the antenna board
(See Fig.10, 11)
• Prior to performing the following procedure, remove the metal
cover.
(1) Disconnect the card wire from connector CN1 on the an-
tenna board on the right side of the body.
(2) Remove the band attaching the antenna board.
(3) Remove the two screws F on the rear panel on the back of
the body.
Antenna board
CN1
Band
Fig.10
Rear panel
Rear panel
F
Fig.11
1-8 (No.22035)
2.1.5 Removing the rear panel
(See Fig.12~16)
• Prior to performing the following procedure, remove the metal
cover and the CD changer mechanism assembly.
(1) Remove holding board by remove two plastic rivets and
then slide out the holding board as shown in fig.12.
(2) Disconnect fan wire from connector CN206 on the bridge
board.
(3) Disconnect the flat wire from connector CN91 on the sur-
round speakers jack board.
(4) Cut off the band that fixing fan wire on inner bar.
(5) Remove ten screws G from rear panel.
(6) Detach joint b to release rear panel from inner bar.
(7) Release joints c which 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 surround speaker jack board will come off
with rear panel.
Rear panel
G
G
Rear panel
Joint b
Inner bar
Holding board
Fig.12
Band
Plastic rivets
Inner bar
Joint c
Rear panel
G
G
Fig.14
Rear panel
Fig.15
Surround speakers
jack board
CN91
Bridge board
CN206
Fig.13
Joint c
Fig.16
(No.22035)1-9
2.1.6 Removing the T.flux board
r
(See Fig.17, 18)
• Prior to performing the following procedure, remove the metal
cover and the CD changer mechanism assembly .
(1) Disconnect the card wire from connector CN102 on the
T.flux board.
(2) Remove the two plastic rivets attaching the T.flux board.
(3) Remove the T.flux board from the bracket which is located
on the inner bar. (two joints d)
Front panel assembly
T.flux board
Fig.17
Plastic rivet
d
Fig.18
T.flux board
CN102
Plastic rivet
Inner ba
1-10 (No.22035)
2.1.7 Removing the fan assembly
(See Fig.19, 20)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and the rear panel.
(1) Remove two screws H on the rear panel.
(2) Rotate fan assembly in clockwise direction to release fan
assembly from rear panel (joints e).
H
Rear panel
Fig.19
e
2.1.8 Removing the main board
(See Fig.21)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly, the antenna
board and the rear panel.
(1) Disconnect the card wires from connector CN44, CN504
and CN870 on the main board.
(2) Disconnect the flat wire from connector CN922 on the main
board.
(3) Remove the screw D attaching the main board.
(4) Disconnect connector CN217 and CN311 on the main
board outward and release from the base chassis (joint f)
upward.
CN870
CN922
CN44
D
Fig.20
CN311
Fig.21
Fan assembly
e
CN217
f
CN504
Main board
(No.22035)1-11
2.1.9 Removing the bridge board / regulator board / heat sink
r
(See Fig.22~27)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly, the rear panel,
the antenna board and main board.
(1) Remove the plastic rivet attaching the stay inner bar and
remove the screw I on the bridge board.
(2) Move the inner bar forward and upward to release from the
front section (joint g) and from the bridge board (two joints
h) respectively.
(3) Disconnect the wires from connector CN212, CN213 and
CN214 on the primary board respectively and remove the
band fixing the wires.
(4) Disconnect the wire from connector CN701 on the bridge
board.
(5) Remove the two screws J attaching the heat sink bracket
and move the heat sink in the direction of the arrow to release from the base chassis. The bridge board and the reg-
ulator board come off with the heat sink.
(6) Remove the two screws K attaching the heat sink bracket.
(7) Disconnect connector CN205, and then remove the bridge
board from the regulator board.
(8) Remove the two screws M and two screws N to detach
regulator board from heat sink.
CAUTION:
As assembly back the regulator board and bridge board to
heat sink.
Regulator board must be assembling to heat sink first and
screws M and N must be screwed before bridge board attach
to regulator board.
Plastic rivet
Bridge board
CN701
Regulator board
Band
Bridge board
J
Primary board
CN213
CN212
CN214
Fig.24
Heat sink
J
Heat sink bracket
Fig.25
Bridge board
Bridge board
Bridge board
Fig.22
Inner bar
Fig.23
I
Inner ba
Regulator board
Heat sink bracket
Heat sink
K
Fig.26
Plastic rivet
Heat sink
Heat sink bracket
Regulator board
N
g
CN215
M
h
N
Fig.27
CN205
Bridge board
1-12 (No.22035)
2.1.10 Removing the power transformer assembly
(See Fig.28,29)
• 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 O attaching the primary board.
(2) Disconnect the wire from connector CN231 and CN232 on
the primary board.
(3) Remove the four screws P attaching 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.
Power transformer assembly
Primary board
O
Fig.28
Power transformer
assembly
P P
Primary board
CN231,CN232
CN250
Band
Cord stopper
Fig.29
(No.22035)1-13
2.2 Front panel assembly
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and front panel
assembly.
Head amplifier & mechanism control board
CN33
2.2.1 Removing the cassette mechanism assembly
(See Fig.30)
(1) Disconnect the card wire from connector CN33 on the head
amplifier & mechanism control board.
(2) Remove the two screws Q, and the two screws R attaching
the cassette mechanism assembly.
2.2.2 Removing the headphone board
(See Fig.30)
(1) Remove the screw S and pull out the headphone board
backward.
(2) Cut off the band.
2.2.3 Removing the mic volume board
(See Fig.31, 32)
(1) Pull the mic volume knob toward the front.
(2) Remove the three screws T attaching the holding board.
(3) Remove the holding board from mic volume board.
Q
Cassette mechanism assembly
Fig.30
Front panel assembly
R
Headphone board
SR
1-14 (No.22035)
Mic volume board
T
Mic volume knob
Fig.31
T
Holding board
Fig.32
2.2.4 Removing the display system control board
(See Fig.33, 34)
(1) Remove the four screws U attaching the stay bracket (1).
(2) Disconnect the card wires from connector CN43 and
CN880 on the display system control board.
(3) Remove the ten screws V attaching the display system
control board.
Stay bracket (1)
U
V
Display system control board
CN43
Fig.33
V
CN880
V
Display system control board
CN43
Fig.34
V
CN880
(No.22035)1-15
2.2.5 Removing the button board
(See Fig.35~39)
• Prior to performing the following procedure, remove the dis-
play system control board.
(1) Pull out preset knob, sound mode knob on the front panel
toward the front.
(2) Pull out the volume knob and remove the two screws W at-
taching the knob holder. Remove the nut from the front
panel.
(3) Remove the four screws X attaching the stay bracket (2).
(4) Remove the eight screws Y attaching the button board.
Front panel assembly
Sound mode knob
Nut
Fig.37
X
Knob holder
Fig.35
Fig.36
Volume knobPreset knob
Button board
W
Y
Stay bracket (2)
Fig.38
Y
Y
Fig.39
1-16 (No.22035)
2.3 CD Changer Mechanism
A
• Remove the CD changer mechanism assembly.
2.3.1 Removing the CD Servo control board
(See Fig.1)
(1) From bottom side the CD changer mechanism assem-
bly,remove the four screws A retaining the CD servo control board.
(2) Absorb the four soldered positions a of the right and left
motors with a soldering absorber.
(3) Pull out the earth wire on the CD changer mechanism as-
sembly.
(4) Disconnect the connector CN854 on the CD servo control
board.
(5) Disconnect the card wire CN601 and the connector CN801
on the CD servo control board.
A
a
CN854
CN651
CD servo control board
CN801
CN151
CN601
a
AA
Fig.1
(No.22035)1-17
2.3.2 Removing the CD tray assembly
(See Fig.2~9)
(1) Remove the CD servo control board.
(2) Remove the screw B retaining the lod stopper.
(3) From the T.bracket section b and clamper base section c ,
remove both of the edges fixing the rod.
(4) Remove the three screws C retaining the T.bracket.
(5) Remove the screw D retaining the clamper assembly.
(6) From the left side face of the chassis assembly, remove the
one screw E retaining both of the return spring and lock le-
ver.
(7) By removing the pawl at the section d fixing the return
spring, dismount the return spring.
(8) Remove the three lock levers.
(9) 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.
(10) Make sure that the driver unit elevator is positioned as
shown in Fig.6 from to the second or fifth hole on the left
side face of the CD changer mechanism assembly.
CAUTION:
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.
(11) Manually turn the motor pulley in the clockwise direction
until the lifter unit stopper is lowered from the section e of
CD tray assembly.
(12) Pull out all of the three stages of CD tray assembly in the
arrow direction f until these stages stop.
(13) 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. In this
case, it is easy to pull out the assembly when it is pulled out
first from the stage CD tray assembly.
C
Clamper assembly
T.Braket
C
B
Lod stopper
(C/J version only)
C
D
Fig.3
d
Return spring
Clamper base
Lock lever
Fig.4
Stopper
E
b
Rod
c
T.Braket
Fig.2
e
CD tray
assembly
1-18 (No.22035)
Fig.5
f
Chassis assembly
r
A
Refer to Fig.7
Pawl
g
Fig.6
Drive unit of elevato
Fig.7
CD tray assembly
Pulley gear
Motor pulley
Fig.8
CD
3
CD
2
CD
1
CD tray assembly
Pawl g, g'
Fig.9
2.3.3 Removing the CD loading mechanism assembly
(See Fig.10)
(1) 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.
(2) Remove the four screws F retaining the CD loading mech-
anism assembly.
rrow
Cams R1, R2 assembly
h
i
F
F
F
CD loading mechanism assembly
Fig.10
(No.22035)1-19
F
2.3.4 Removing the CD traverse mechanism
j
(See Fig.11 and 12)
(1) For dismounting only the CD traverse mechanism 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 .
(2) By raising the CD loading mechanism assembly in the ar-
row direction l , remove the assembly from the lifter unit.
Cam R1, R2 assembly
Fig.11
Arrow
k
CD traverse mechanism
2.3.5 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 .
(2) According to the above step, shift the CD pickup unit to the
center position.
(3) While pressing the stopper retaining the shaft in the arrow
direction o , pull out the shaft in the arrow direction p .
(4) After dismounting the shaft from the CD pickup unit, re-
move the CD pickup unit.
Lifter unit
Fig.12
CD Pickup unit
n
m
Arrow
l
CD loading
mechanism
1-20 (No.22035)
Cam gear
Shaft
Shaft
p
o
Stopper Stopper
Fig.13
Shaft
2.3.6 Removing the try select switch board
r
(See Fig.14)
(1) Remove the two screws G retaining the tray select switch
board.
(2) Disconnect the tray select switch board from connector
CN854 on the CD servo control board.
Chassis assembly
Tray select
switch board
CN854
CN851
CD servo
control board
2.3.7 Removing the cam unit
(See Fig.15 ~17)
• Remove the CD loading mechanism assembly.
(1) While turning the cam gear q , align the Paul r position of
the drive unit to the notch position on the cam gear q .
(2) Pull out the drive unit and cylinder gear .
(3) While turning the cam gear q , align the Paul s position
of the select lever to the notch position on the cam gear q .
(4) Remove the four screws H retaining the cam unit(cam
gear q and cams R1/R2 assembly).
Drive unit
Cam gear q
r
Fig.14
Drive unit
Cylinder gea
CN804
G
Fig.16
Cams R1, R2 assembly
Cam unit
Fig.15
H
Cam gear q
H
s
Select lever
Fig.17
(No.22035)1-21
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