JVC UX-A10DVD User manual

SERVICE MANUAL
MICRO COMPONENT MD SYSTEM
No.22011
Jan. 2003
COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.
UX-A10DVD
UX-A10DVD
Contents
Safety precaution
Preventing static electricity
Disassembly method
Adjustment method
Maintenance of MD pickup
1-2
1-3
1-4
1-39
1-47
Procedures of changing the
MD pickup
Maintenance of DVD pickup
Procedures of changing the
DVD pickup
Description of major ICs
1-47
1-48
1-48
1-49~88
Area suffix
UB ----------- Hong Kong

1-2
UX-A10DVD
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.).
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.
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
!
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.)

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UX-A10DVD
CN101
Sorting round point
CN101
Flexible wire
Servo control board
DVD mechanism assembly
MD mechanism assembly
CN321
Pickup Soldering
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
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.
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.
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.
Attention when traverse unit is decomposed
1.Solder is put up before the card wire is removed from connector on the CD substrate as shown in Figure.
(When the wire is removed without putting up solder, the pick-up assembly might destroy.)
2.Please remove solder after connecting the card wire with
when you install picking up in the substrate.
*Please refer to "Disassembly method" in the text for pick-up and how to
detach the substrate.
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate

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UX-A10DVD
Remove the six screws Aon the back of the body.
Remove the screw Bon each side of the body.
Detach the rear side of the metal cover upward while
pulling the lower sides outward.
1.
2.
3.
Disassembly method
<Main body>
Removing the metal cover (See Fig.1~3)
Fig.1
Fig.2
Fig.3
A
A
A
Metal cover
Metal cover
Metal cover
B
B

1-5
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Prior to performing the following procedure, remove
the metal cover.
Remove the three screws Cattaching the DVD
mechanism assembly on top of the body.
Disconnect connector CN502 and CN503 on the
DVD servo board upward at the bottom of the DVD
mechanism assembly.
Bring up the DVD mechanism assembly and remove
backward.
1.
2.
Removing the DVD mechanism assembly
(See Fig.4~6)
Fig.4
Fig.5
Fig.6
C
C
C
DVD mechanism assembly
DVD mechanism assembly
CN503
CN502
DVD mechanism assembly

1-6
UX-A10DVD
Prior to performing the following procedure, remove
the metal cover and the DVD mechanism assembly.
Disconnect the card wire from connector CN705 on
the microcomputer board in the center of the right
side of the body.
Disconnect the card wire from connector CN301 on
the main board in the center of the left side of the
body.
Disconnect the card wire from connector CN704,
and the wires from CN703 and CN710 on the
microcomputer board.
1.
2.
3.
Removing the front panel assembly
(See Fig.7~10)
Disconnect the card wire from connector CN442 on
the FL connection board on top of the body.
Remove the screw Don each side of the body.
Remove the two screws Eon the bottom of the
body.
Release the joint aon the bottom and the two joints
bon the right and left sides of the body using a
screwdriver. Remove the front panel assembly
toward the front.
4.
5.
6.
7.
When disconnecting the wires from
CN703 and CN710, remove the
spacer attaching the wires.
ATTENTION:
Fig.7
Fig.8
Fig.10Fig.9
Front panel assembly
D
D
Microcomputer board
CN705
Microcomputer board
CN704
b
Front panel assembly
b
CN703
CN710
Main board
CN301
FL connection board
CN442 Front panel assembly
Microcomputer board
CN704
Spacer
Spacer
CN710 CN703
E
E
a
Front panel assembly

1-7
UX-A10DVD
Prior to performing the following procedure, remove
the metal cover and the DVD mechanism assembly.
Remove the two screws Fon the back of the body.
Disconnect the wire from connector CN1 on the
tuner pack on the right side of the body.
Remove the thirteen screws Gon the back of the
body.
Release the two joints con the lower right and left
sides of the rear panel.
1.
2.
3.
4.
Removing the rear cover/ rear panel
(See Fig.11~15)
The rear panel with the tuner pack
comes off.
REFERENCE:
Fig.15Fig.14
FIg.13
Fig.11
Fig.12
Rear panel
Tuner pack
CN1 Rear panel
G
F
F
G
G
G
G
G
Rear panel
cc
Rear panel
Rear panel
Rear cover

1-8
UX-A10DVD
Prior to performing the following procedure, remove
the metal cover.
Disconnect the card wire from connector CN1 on the
tuner pack on the right side of the body.
Remove the two screws Hon the back of the body.
1.
2.
Removing the tuner pack (See Fig.16)
Prior to performing the following procedure, remove
the metal cover, the DVD mechanism assembly, the
rear cover/rear panel and the DVD relay board.
Disconnect the wire from connector CN711 on the
microcomputer board on the right side of the body.
Remove the three screws Iattaching the fan bracket
on top of the body and release the joint d.
Remove the two screws Jattaching the fan.
1.
2.
3.
Removing the fan (See Fig.17,18)
Fig.17
Fig.18
Fig.16
Tuner pack
CN1
H
CN711
Fan bracket
Fan bracket
d
I
J
I
Fan

1-9
UX-A10DVD
Prior to performing the following procedure, remove
the metal cover, the DVD mechanism assembly and
the front panel assembly.
Remove the two screws Kattaching the DVD
mechanism attaching bracket.
Remove the two screws Lon each side of the MD
mechanism assembly and remove the MD
mechanism assembly toward the front.
Disconnect the card wire from connector CN521 on
the MD mechanism assembly board.
1.
2.
3.
Removing the MD mechanism assembly
(See Fig.19~21)
Prior to performing the following procedure, remove
the metal cover, the DVD mechanism assembly and
the front panel assembly.
Disconnect the wire from connector CN310 on the
main board on the left side of the body.
Release the wires from the two clamps on the
bottom chassis.
Remove the screw Mattaching the headphone
board on the right side of the body.
1.
2.
3.
Removing the headphone board
(See Fig.22,23)
Fig.21
Fig.23
Fig.22
Fig.20
Fig.19
MD mechanism assembly
MD mechanism assembly
MD mechanism assembly
CN521
DVD mechanism attaching bracket
DVD mechanism
attaching bracket
L
L
K
Headphone board
Clamp
Main board
CN310 Headphone board M

1-10
UX-A10DVD
Prior to performing the following procedure, remove
the metal cover, the DVD mechanism assembly, the
front panel assembly and the rear cover/ rear panel.
Remove the two screws Nand the three screws O.
Remove the heat sink.
Disconnect the wires from connector CN307 and
CN310, the card wire from CN312 on the main board
on the left side of the body.
Remove the screw Pand Qattaching the main
board.
Disconnect connector CN303, CN304, CN305 and
CN306 on the main board. Release the two joints e
at the bottom.
Draw out the main board and disconnect the card
wire and the wire from connector CN302 and
CN311.
1.
2.
3.
4.
5.
Removing the main board
(See Fig.24,25)
Prior to performing the following procedure, remove
the metal cover, the DVD mechanism assembly and
the rear panel/ rear cover.
Disconnect the card wire from connector CN515 on
the DVD relay board.
Remove the screw Rattaching the DVD relay board
on top of the body.
Disconnect connector CN511 and CN512 on the
DVD relay board.
1.
2.
3.
Removing the DVD relay board
(See Fig.26)
Fig.26
Fig.25
Fig.24
CN307
CN312
CN310
CN302
CN311
e
eQ
P
Heat sink
Main board CN303 CN304
CN305
CN306
Main board
N
O
Heat sink
R
CN515
CN511
CN512
DVD connector board
Main board

1-11
UX-A10DVD
Prior to performing the following procedure, remove
the metal cover, the DVD mechanism assembly, the
front panel assembly, the rear cover/ rear panel, the
main board and the DVD relay board.
Removing the MD base chassis/
microcomputer board (See Fig.27~29)
Disconnect the wire from connector CN701 on the
microcomputer board in the center of the right side of
the body.
Remove the two screws Sattaching the MD base
chassis on top of the body.
Disconnect connector CN706 and CN707 on the
microcomputer board from the main board.
1.
2.
3.
Remove the two screws Tattaching the
microcomputer board and release the two joints f.
4.
The MD base chassis with the MD
mechanism assembly comes off.
REFERENCE:
It is not necessary to remove the DVD
mechanism assembly.
REFERENCE:
Fig.29
Fig.28
Fig.27
MD mechanism assembly
MD mechanism assembly MD base chassis
Fan bracket
MD base chassis
Main board
CN706
CN707
CN706
CN707
Microcomputer board
CN701
S
T
Microcomputer
board
f

1-12
UX-A10DVD
Prior to performing the following procedure, remove
the metal cover, the DVD mechanism assembly, the
front panel assembly, the rear cover/ rear panel, the
main board and the MD base chassis.
Move the power cord stopper upward on the back of
the body and remove. Disconnect the power cord
from connector CN901 on the power transformer
board.
1.
Remove the four screws Uon top of the body and
release the wires from the two clamps on the bottom
chassis.
2.
Removing the power transformer
assembly (See Fig.30,31)
Prior to performing the following procedure, remove
the metal cover, the DVD mechanism assembly, the
front panel assembly, the rear cover/ rear panel, the
main board and the MD base chassis.
Disconnect the wire from connector CN111 on the
power amplifier board.
Remove the band attaching the wire to the power
amplifier board.
Release the wires from the clamp.
Move the power amplifier board upward to release
the two joints gand remove to the right.
1.
2.
3.
4.
Removing the power amplifier board
(See Fig.32,33)
The power cord can be removed alone.
REFERENCE:
Fig.31
Fig.33
Fig.32
Fig.30
Power transformer board
CN901
Power cord stopper
Power cord
Clamp Bottom chassis
UU
U
Power transformer
assembly
Power amplifier board
CN111
Power amplifier
board
g
Band
Power amplifier board
Band
Clamp

1-13
UX-A10DVD
Prior to performing the following procedure, remove
the metal cover, the DVD mechanism assembly and
the front panel assembly.
<Front panel assembly>
Remove the spring attached to the cassette door on
the back of the front panel.
Remove the four screws Vattaching the cassette
mechanism assembly.
1.
2.
Removing the cassette mechanism
assembly (See Fig.34,35)
Prior to performing the following procedure, remove
the cassette mechanism assembly.
Pull out the volume knob on the front side of the front
panel.
Remove the five screws Wattaching the bracket (1)
on the back of the front panel.
Remove the ten screws Xattaching the key board.
1.
2.
3.
Removing the key board (See Fig.36~38)
Fig.38Fig.37
Fig.36
Front panel assembly
Volume knob
Bracket(1) W
W
X
X
X
X
W
Front panel
Key board
Fig.35
Fig.34
V
V
V
Cassette mechanism assembly
Spring
Cassette door
Spring

1-14
UX-A10DVD
Remove the two screws Yand the screw Z
attaching the bracket (2) on the back of the front
panel.
Disconnect the card wire from connector CN441 on
the FL connection board.
Push the two joint tabs hdownward to release and
pull out the FL connection board.
1.
2.
3.
Removing the FL connection board
(See Fig.39~41)
Remove the two screws Yand the screw Zattaching
the bracket (2) on the back of the front panel.
Remove the screw A' attaching the drive motor
assembly. Release the joint tab iand pull out the
drive motor assembly.
1.
2.
Removing the Drive motor assembly
(See Fig.39, 40,42)
Fig.40
Fig.42Fig.41
Fig.39
Y
Y
FL connection board
CN441 Front panel
Bracket(2)
Bracket(2) Front panel
Drive motor
h
h
FL connection board
CN441
A'
Z
i
Drive motor

1-15
UX-A10DVD
Prior to performing the following procedure, remove
the drive motor assembly.
Remove the belt from the pulley
Remove the two screws B' attaching the drive
motor.
1.
2.
Removing the belt/ drive motor
(See Fig.43)
Prior to performing the following procedure, remove
the bracket (2) / drive motor assembly.
Disconnect the card wire from connector CN441 on
the FL connection board(Do not fold down the card
wire).
Release the joint jand kin order on the right and left
sides of the shaft gear.
Remove the screw C' attaching the switch board
and release the joint tab l.
1.
2.
Removing the switch board
(See Fig.44,45)
Fig.45
Fig.44
Fig.43
Belt
Drive motor
B'
FL connection board
CN441
k
j
Switch board
Switch board
C'
l
Shaft gear

1-16
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Remove the four screws D' attaching the case cover
on the front panel.
Pull out the FL panel from the four joint bosses mon
the FL display cover.
Remove the four screws E' attaching the FL display
cover. Disconnect the card wire from connector
CN451 on the FL relay board and from CN452 on
the LED board.
1.
2.
3.
Removing the FL display section
(See Fig.46~51)
Fig.47
Fig.49Fig.48
Fig.46
D'
D'
Case cover
FL panel
m
m
FL connection board
CN451 LED board
CN452
FL display cover
E' E'
FL display cover

1-17
UX-A10DVD
Remove the two screws F' attaching the FL display
on the FL display cover.
The FL board and the lens come off from the FL
display section.
4.
5.
Removing the FL relay board(See Fig.52)
Prior to performing the following procedure, remove
the FL display cover.
Disconnect the card wire from connector CN453 on
the FL relay board.
Remove the two screws G' attaching the FL relay
board.
1.
2.
Fig.51
Fig.52
Fig.50
FL display section FL display cover
F' F'
FL display section
LED board
Lens
FL connection board
CN453
G'
G'
FL board

1-18
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Remove the four screws Aattaching the clamper
assembly.
Move the clamper assembly in the direction of the
arrow to release the joint aon each side, and
remove.
1.
2.
<DVD loading mechanism section>
Removing the clamper assembly
(See Fig.1)
Prior to performing the following procedure, remove
the clamper assembly.
Push the part b of the slide cam through the slot on
the left side of the loading base.
Draw out the tray toward the front.
1.
2.
Removing the tray (See Fig.2,3)
When reassembling, reattach the
clamper assembly at the two joints a.
ATTENTION:
When reattaching the tray, move the
part c of the slide cam to the right(See
Fig.3).
ATTENTION:
Solder the sorting round point on the flexible wire
connected to connector CN101 on the servo control
board.
Disconnect the flexible wire from connector CN101
on the servo control board.
Disconnect the card wires from connector CN201
and CN202 on the servo control board.
Release the two joints d.
Move the servo control board in the direction of the
arrow to release the joint e, and remove upward.
1.
2.
3.
4.
5.
Removing the servo control board
(See Fig.4)
Solder the sorting round point before
disconnecting the flexible wire extending
from the pickup. If you do not follow this
instruction, the pickup may be damaged.
CAUTION:
Unsolder the sorting round point after
reassembling.
CAUTION:
CN101
Fig.4
Sorting round point
CN202
CN101
Flexible wire
CN201
d
Servo control board
e
d
Fig.2
Fig.3
b
Tray
Loading base
c
Slide cam
a
a
AA
A A
Fig.1
Clamper
assembly

1-19
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Prior to performing the following procedure, remove
the clamper assembly, the tray and the servo control
board.
Remove the four screws Battaching the traverse
mechanism assembly.
1.
Removing the traverse mechanism
assembly (See Fig.5,6)
Prior to performing the following procedure, remove
the clamper assembly, the tray, the servo control
board and the traverse mechanism assembly.
Pull the two tabs goutward and release the two
shafts of the elevator.
1.
Removing the elevator (See Fig.7 and 8)
When reassembling, fit the two shafts
on the front side of the elevator into
the grooves h of the slide cam.
ATTENTION:
When reassembling, get the flexible wire
extending from the spindle motor board
through the slot f of the elevator.
CAUTION:
Fig.5
Fig.6
Fig.7 Fig.8
BB
B
BB
B
Traverse mechanism
assembly
B
B
Traverse mechanism
assembly
f
Elevator
Elevator
Elevator
Tab g
Tab g
Loading base
Elevator
Shaft
Slide cam
h

1-20
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Prior to performing the following procedure, remove
the clamper assembly, the tray, the servo control
board, the traverse mechanism assembly and the
elevator.
Remove the belt from the pulley.
Remove the screw Cattaching the loading motor.
Remove the screw Dattaching the motor board on
the back of the loading assembly.
Release the tab ifixing the motor board and remove
the motor assembly.
1.
2.
3.
4.
Removing the motor assembly
(See Fig.9,10)
Fig.9
Fig.10
C
Loading motor pulley
Belt
Loading assembly
Motor board
Motor assembly
D
Ta b i