JVC UXA-7-DVD Service manual
22013200303
UX-A7DVD
SERVICE MANUAL
MICRO COMPONENT SYSTEM
UX-A7DVD
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TABLE OF CONTENTS
1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 Adjustment method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34
4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-41
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
No.22013
2003/03
UX-A7DVD
Important Safety Precautions
1.1 Safety Precautions
(1) This d esign of this product co ntains 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) Alteratio ns of the design or circuitry of the p roduct 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, watt age, etc. Replacement parts which have these specia l safety
characteristics are identified in the Parts List of Service Manual. Electrical components having such feat ures are iden tified 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 origin al 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 ohms per volt or more sensitivity in
the following manner. Connect a 1,500 ohm 10W resistor
paralleled by a 0.15 µF AC-type capacitor between an
SECTION 1
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 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.).
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the leg al 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 a re 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 o f the same type
and rating as specified by the manufacturer. (Except the JC version)
1-2 (No.22013)
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 preve nt damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD 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 conducti ve sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Grou nd yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
UX-A7DVD
(3) Handling the optical pickup
• In order to maintain quality during transport and before installatio n, both sides of the laser diod e on the replacement opti cal
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 replace-
ment procedure in the text. Remove the anti-static pin whe n replac ing the traverse un it. 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.
1.7 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the DVD pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connector CN101 on the DVD servo board.
(If the flexible wire is disconnected without applying solder, the DVD 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.
Short lands
DVD mechanism assembly
Flexible wire
Connector
CN202
CN201
DVD servo board
(No.22013)1-3
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1.8 Important for laser products
(1) CLASS 1 LASER PRODUCT
(2) DAN GER : 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) CAU TION : The compact disc player uses invisible laser
radiation and is equipped with safety switches which
prevent 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.
CAUTION
Please use enough caution not to see the beam directly
or touch it in case of anadjustment or operation check.
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.
REPRODUCTION AND POSITION OF LABELS
ADVARSEL
Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er
ude af funktion. Undgå udsasttelse for stråling.
ADVARSEL
Usynlig laserstråling ved åpning, når sikkerhetsbryteren er avslott. unngå utsettelse for stråling.
Caution label
1-4 (No.22013)
SECTION 2
A
A
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) Detach the rear side of the metal cover upward while pull-
ing the lower sides outward.
A
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Metal cover
Fig.1
B
Fig.2
Metal cover
B
Fig.3
(No.22013)1-5
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2.1.2 Removing the DVD mechanism assembly
(See Fig.4, 5)
• Prior to performing the following procedure, remove the metal
cover.
(1) Remo ve the three screws C attaching the DVD mecha-
nism assembly on top of the body.
(2) Disconnect connector CN502 and CN503 on the DVD ser-
vo board upward at the bottom of the DVD mechanism assembly.
Bring up the DVD mechanism assembly and remove backward.
DVD mechanism assembly
CC
CN502
CN503
C
Fig.4
DVD mechanism assmbly
Fig.5
1-6 (No.22013)
2.1.3 Removing the front panel assembly
r
(See Fig.6~9)
• Prior to performing the following procedure, remove the metal
cover and the DVD mechanism assembly.
(1) Disconnect the card wire from connector CN705 on the mi-
crocomputer board in the center of the right side of the
body.
(2) Disconn ect the card wire from connector CN301,and the
wires from connector CN300 and CN710 on the main
board in the center of the left side of the body.
(3) Disconn ect the card wire from connector CN704, and the
wire from CN703 on the microcomputer board.
ATTENTION:
When disconnecting the wires from CN703 and CN710,
remove the spacer attaching the wires.
(4) Disconnect the card wire from connector CN442 on the FL
connection board on top of the body.
(5) Remove the screw D on each side of the body.
(6) Remove the two screws E on the bottom of the body.
(7) Release the joint a on the bottom and the two joints b on
the right and left sides of the body using a screwdriver. Re-
move the front panel assembly toward the front.
Front panel assembly
Main board
CN710
CN301 CN300
Front panel assembly
CN703
Fig.7
FL connection board
CN442
Micro computer board
b
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Spacer
D
CN704
D
Space
D
CN710
b
Micro computer board
CN705
Fig.6
Fig.8
E
CN703
Front panel assembly
CN704
a
Fig.9
(No.22013)1-7
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2.1.4 Removing the rear cover / rear panel
(See Fig.10~14)
• Prior to performing the following procedure, remove the metal
cover and the DVD mechanism assembly.
(1) Remove the two screws F on the back of the body.
REFERENCE:
There is no need to remove the metal cover.
(2) Disconnect the card wire from connector CN1 on the tuner
pack on the right side of the body.
(3) Remove the twelve screws G and the two screws H on the
back of the body.
(4) Release the two joints c on the lower right and left sides of
the rear panel.
REFERENCE:
The rear panel with the tuner pack comes off.
G
Rear cover
G
G
Rear panel
Rear cover
Fig.10
F
H
G
c
Fig.12
Rear panel
Fig.13
1-8 (No.22013)
Tuner pack
CN1
Fig.11
Rear panel
Rear panel
Fig.14
c
2.1.5 Removing the tuner pack
(See Fig.15)
• Prior to performing the following procedure, remove the metal
cover.
(1) Disconnect the card wire from connector CN1 on the tuner
pack on the right side of the body.
(2) Remove the two screws I on the back of the body.
2.1.6 Removing the fan
(See Fig.16,17)
• Prior to performing the following procedure, remove the metal
cover, the DVD mechanism assembly, the rear cover/rear panel and the DVD relay board.
(1) Disconn ect the wire from connector CN711 on the micro-
computer board on the right side of the body.
(2) Remove the three screws J attaching the fan bracket on
top of the body and release the joint d.
(3) Remove the two screws K attaching the fan.
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Tuner pack
I
CN1
Fig.15
Micro computer board
CN711
J
Fan bracket
Fan bracket
J
d
J
Fig.16
K
Fan
Fig.17
(No.22013)1-9
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2.1.7 Removing the headphone board
(See Fig.18, 19)
• Prior to performing the following procedure, remove the metal
cover, the DVD mechanism assembly and the front panel assembly.
(1) Disco nnect the wire from connector CN310 on the main
board on the left side of the body.
(2) Release the wires from the two clamps on the bottom chas-
sis.
(3) Remov e the screw L attaching the headphone board on
the right side of the body.
Headphone board
Clamp
Main board
CN310
Fig.18
Headphone board
Fig.19
L
1-10 (No.22013)
2.1.8 Removing the main board
(See Fig.20, 21)
• Prior to performing the following procedure, remove the metal
cover, the DVD mechanism assembly, the front panel assembly and the rear cover/ rear panel.
(1) Remove the two screws M and the three screws N, and
then remove the heat sink.
(2) Disconn ect the wires from connector CN307 and CN310,
the card wire from CN312 on the main board on the left side
of the body.
(3) Remove the screw O and P attaching the main board.
(4) Disconnect connector CN303, CN304, CN305 and CN306
on the main board. Release the two joints e at the bottom.
(5) Draw out the main board and disconnect the wire from con-
nector CN311.
Heat sink
Main board
CN303
O
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CN304
CN305
CN306
N
M
Fig.20
2.1.9 Removing the DVD relay board
(See Fig.22)
• Prior to performing the following procedure, remove the metal
cover, the DVD mechanism assembly and the rear cover/ rear
panel.
(1) Disconnect the card wire from connector CN515 on the
DVD relay board.
(2) Remove the screw Q attaching the DVD relay board on top
of the body.
(3) Disconnect connector CN511 and CN512 on the DVD relay
board.
CN311
e
DVD relay baoard
CN512 CN511
P
e
Fig.21
CN312
CN307
CN310
CN515
Q
Fig.22
(No.22013)1-11
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2.1.10 Removing the base chassis / microcomputer board
(See Fig.23~25)
• 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.
(1) Di sconnect the wires from connector CN701 and CN711
on the microcomputer board in the center of the right side
of the body.
(2) Remove the screw R attaching the voltage selector board.
(3) Re move the two screws S attaching the ba se chassis on
top of the body.
(4) Remo ve the two screws T attaching the microcomputer
board and release the two joints f .
Base chassis
Base chassis
S
Microcomputer board
CN701
CN711
Fig.23
Voltage selector board
R
Fan bracket
Microcomputer
board
Fig.24
T
1-12 (No.22013)
f
Fig.25
2.1.11 Removing the power transformer assembly
r
(See Fig.26, 27)
• rior 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 base
chassis.
(1) Mo ve 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.
REFERENCE:
The power cord can be removed alone.
(2) Remove the four screws U and release the wires from the
two clamps on the bottom chassis.
Power transformer board
CN901
Power cord
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Power amplifier board
Power cord stopper
Fig.26
U
Clamp
U
Fig.27
Bottom chassis
U
Power transforme
assembly
(No.22013)1-13
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2.1.12 Removiing the power amplifier board
(See Fig.28, 29)
• 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 base
chassis.
(1) Di sconnect the wire from connector CN111 on the power
amplifier board.
(2) Remove the band attaching the wire to the power amplifier
board.
(3) Release the wires from the clamp.
(4) Move the power amplifier board upward to release the two
joints g and remove to the right.
Band
Power amplifier board
CN111
Fig.28
Power amplifier
board
g
Clamp
Fig.29
Band
1-14 (No.22013)
2.2 Front panel assembly
• Prior to performing the following procedure, remove the metal
cover, the DVD mechanism assembly and the front panel assembly.
2.2.1 Removing the cassette mechanism assembly
(See Fig.30, 31)
(1) Remove the spring attached to the cassette door on the
back of the front panel.
(2) Remove the fo ur screws V atta ch ing th e cassette mecha-
nism assembly.
V
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Cassette mechanism
assembly
V
Spring
V
Fig.30
Cassette door
Spring
Fig.31
(No.22013)1-15
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2.2.2 Removing the key board
(See Fig.32~34)
• Prior to performing the following procedure, remove the cas-
sette mechanism assembly.
(1) Pull out the volume knob on the front side of the front panel.
(2) Remove the five screws W attaching the bracket (1) on the
back of the front panel.
(3) Remove the ten screws X attaching the key board.
Front panel assembly
X
Key board
X
X
X
Fig.34
Volume knob
Fig.32
Bracket(1)
W
WW
Front panel
Fig.33
1-16 (No.22013)
2.2.3 Removing the MIC board
(See Fig.35, 36)
• Prior to performing following procedure, remove the cassette
mechanism assembly
(1) Remove the screw Y attaching the MIC board.
(2) Pull out the mic volume knob on the front side of the front
panel.
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Y
Mic volume knob
Fig.35
Fig.36
(No.22013)1-17
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2.2.4 Removing the FL connection board
(See Fig.37~39)
(1) Remove the two screws Z and the screw AA attaching the
bracket (2) on the back of the front panel.
(2) Disconnect the card wire from connector CN441 on the FL
connection board.
(3) Push the two joint tabs h downward to release and pull out
the FL connection board.
Z
FL connection board
CN441
Front panel
Bracket(2)
Bracket(2)
Drive motor assembly
FL connection board
CN441
h
Z
Fig.37
Front panel
AA
Fig.38
h
1-18 (No.22013)
FL connection board
Fig.39
2.2.5 Removing the drive motor assembly
(See Fig.37,38,40)
(1) Remove the two screws Z and the screw AA attaching the
bracket (2) on the back of the front panel.
(2) Remove th e screw AB attaching the drive motor assem-
bly. Release the joint tab i and pull out the drive motor assembly.
2.2.6 Removing the belt / drive motor
(See Fig.41)
• Prior to performing the following procedure, remove the drive
motor assembly.
(1) Remove the belt from the pulley.
(2) Remove the two screws AC attaching the drive motor.
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AB
Drive motor assembly
i
Fig.40
Belt
2.2.7 Removing the switch board.
(See Fig.42)
• Prior to performing the following procedure, remove the brack-
et (2) / drive motor assembly.
(1) Disconnect the card wire from connector CN441 on the FL
connection board (Do not fold down the card wire).
(2) Release the joint j and k in order on the right and left sides
of the shaft gear.
(3) Remove the screw AD attaching the switch board and re-
lease the joint tab k.
Drive motor
AC
Fig.41
FL connection board
CN441
kj
Switch board
AD
Shaft gear
Tab k
Fig.42
(No.22013)1-19
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A
2.2.8 Removing the FL display section
(See Fig.43~48)
(1) Remove the four screws AE attaching the case cover on
the front panel.
(2) Pull out the FL panel from the four joint bosses m on the FL
display cover.
(3) Remo ve the four screws AF attaching the FL display cov-
er. Disconnect the card wire from connector CN451 and
CN452 on the FL relay board.
(4) Remove the two screws AG attaching the FL display on
the FL display cover.
(5) The FL boa rd and the lens come off from the FL display
section.
AE
Case cover
AE
FL relay board
CN451
CN452
LED board
CN461
m
Fig.43
Fig.44
FL display cover
FL panel
m
FL display cover
Fig.46
FL display section
FL display cover
AG AG
Fig.47
FL display section
1-20 (No.22013)
FAF
LED board
Fig.45
FL board
Fig.48
Lens
2.2.9 Removing the FL relay board
A
(See Fig.49)
• Prior to performing the following procedure, remove the FL dis-
play cover.
(1) Disconnect the card wire from connector CN453 on the FL
relay board.
(2) Remove the two screws AH attaching the FL relay board.
FL relay board
CN453
HAH
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Fig.49
(No.22013)1-21
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A
2.3 DVD loading mechanism section
2.3.1 Removing the clamper assembly
(See Fig.1)
(1) Re move the four screws A attaching the cla mper assem-
bly.
(2) Move the clamper assembly in the direction of the arrow to
release the joint a on each side, and remove.
ATTENTION:
When reassembling, reattach the clamper assembly at the two
joints a.
2.3.2 Removing the tray
(See Fig.2, 3)
• Prior to performing the following procedure, remove the
clamper assembly.
(1) Push the part b of the slide cam through the slot on the left
side of the loading base.
(2) Draw out the tray toward the front.
ATTENTION:
When reattaching the tray, move the part c of the slide cam to
the right (See Fig.3).
A
a
a
A
Clamper
assembly
A
Fig.1
Loading base
Tray
b
Fig.2
c
Slide cam
Fig.3
1-22 (No.22013)
2.3.3 Removing the servo control board
(See Fig.4)
CAUTION:
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.
(1) Solder the sorting round point on the flexible wire connect-
ed to connector CN101 on the servo control board.
(2) Disconnect the flexible wire from connector CN101 on the
servo control board.
(3) Disconnect the card wires from connector CN201 and
CN202 on the servo control board. Release the two joints
d.
(4) Move the servo control board in the direction of the arrow
to release the joint e, and remove upward.
CAUTION:
Unsolder the sorting round point after reassembling.
2.3.4 Removing the traverse mechanism assembly
(See Fig.5, 6)
• Prior to performing the following procedure, remove the
clamper assembly, the tray and the servo control board.
(1) Remove the four screws B attaching the traverse mecha-
nism assembly.
CAUTION:
When reassembling, get the flexible wire extending from the
spindle motor board through the slot f of the elevator.
CN201
d
e
Servo control board
B
Traverse mechanism
assembly
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Sorting round point
CN101
Flexible wire
d
CN202
CN101
Fig.4
B
B
B
Traverse mechanism
assembly
B
Fig.5
B
f
Fig.6
(No.22013)1-23
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2.3.5 Removing the elevator
(See Fig.7,8)
• Prior to performing the following procedure, remove the
clamper assembly, the tray, the servo control board and the
traverse mechanism assembly.
(1) Pul l the two tabs g outward and release the two shafts of
the elevator.
ATTENTION:
When reassembling, fit the two shafts on the front side of the
elevator into the grooves h of the slide cam.
Elevator
Tab g
Elevator
Elevator
Loading base
Shaft
Fig.7
Fig.8
Elevator
Tab g
Slide cam
h
1-24 (No.22013)
2.3.6 Removing the motor assembly
(See Fig.9, 10)
• Prior to performing the following procedure, remove the
clamper assembly, the tray, the servo control board, the
traverse mechanism assembly and the elevator.
(1) Remove the belt from the pulley.
(2) Remove the screw C attaching the loading motor.
(3) Remove the screw D attachin g the motor board on the
back of the loading assembly.
(4) Release the tab i fixing the motor board and remove the
motor assembly.
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Belt
C
Loading motor pulley
Fig.9
Tab i
Motor assembly
Motor board
Fig.10
D
Loading assembly
(No.22013)1-25
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p
2.3.7 Removing the idle gear/ pulley gear/ middle gear/ slide cam
(See Fig.11~13)
• Prior to performing the following the procedures, remove the
clamper assembly, the tray, the servo control board, the
traverse mechanism assembly, the elevator and the motor assembly.
(1) Push the two tabs j attaching the idle gear inward and pull
out the idle gear.
(2) Remove the screw E attaching the pulley gear bracket.
Move the pulley gear bracket in the direction of the arrow
and remove upward.
(3) Pull out the pulley gear.
(4) Move the sli de cam in the di re ction of th e arrow to relea se
the two joints k and remove upward.
(5) Remove the middle gear.
Pulley gear bracket
Pulley gear
Motor assembly
E
Pulley gear bracket
E
Idle gear
Fig.11
Idle gear
Tab j
Pulley gear
Pulley gear
1-26 (No.22013)
OK.
YES
Fig.12
NO
Change the picku
Slide cam
Fig.13
Middle gear
Loading base
2.4 DVD traverse mechanism assembly
2.4.1 Removing the feed motor assembly
(See Fig.14)
(1) Unsolder the two soldering l on the spindle motor board.
(2) Remove the two screws F attaching the feed motor assem-
bly.
UX-A7DVD
Feed motor assembly
F
2.4.2 Removing the feed motor
(See Fig.14~16)
• Prior to performing the following procedure, remove the feed
motor assembly.
(1) Remove the screw G and the spring.
CAUTION:
When reassembling, attach the spring correctly to press
the feed gear M and E.
(2) Remove the feed gear M.
(3) Pull out the feed gear E and the lead screw.
(4) Remove the two screws H and the feed motor.
CAUTION:
When reassembling, set the two wires extending from
the feed motor to the notch m of the feed holder as
shown in Fig.14.
F
Pickup
m
l
Spindle motor board
Feed motor
Spindle motor
Fig.14
Lead screw
Feed gear M
Feed gear E
Fig.15
Spring
G
Feed motor
H
Fig.16
(No.22013)1-27
UX-A7DVD
2.4.3 Removing the pickup
(See Fig.17~19)
• Prior to performing the following procedure, remove the feed
motor assembly.
(1) Remove the screw l, the T spring(S) and the shaft holder
with the plate.
ATTENTION:
When reassembling, reattach the T spring (s) correctly to
press the shaft
(2) Detach the part n of the shaft upward and move the part o
in the direction of the arrow, then remove the shaft from the
spindle base.
(3) Release the joint p in the direction of the arrow.
(4) Pul l out the shaft from the pickup.
(5) Remove the two screws J attaching the actuator.
(6) Re lease the joint of the actuato r and the lead spring, and
pull out the lead spring.
ATTENTION:
When reattaching the pickup, attach the spring under the
shaft (See fig.19)
I
Plate
T spring(S)
p
Pickup
n
Fig.17
Spindle base
o
Shaft holder
Pickup
J
Actuator
Actuator
Lead spring
Lead spring
Shaft
Fig.18
Pickup
1-28 (No.22013)
Shaft
Spring
Fig.19
2.4.4 Removing the shaft holder/ shaft
(See Fig.20)
• Prior to performing the following procedure, remove the feed
motor assembly and the pickup.
(1) Remove the screw K attaching the shaft holder.
(2) Remove the shaft.
2.4.5 Removing the spindle motor assembly
(See Fig.21~23)
• Prior to performing the following procedure, remove the feed
motor assembly, the pickup, the shaft and the shaft holder.
(1) Turn over the mechanism base and remove the three
screws L attaching the spindle motor assembly.
ATTENTION:
When reassembling, set the card wire extending from
the spindle motor board to the notch of the spindle base.
(2) Remove the three screws M and the spindle base.
K
Shaft holder
Spindle motor board
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Shaft
Fig.20
Spindle motor assembly
L
Spindle motor
Spindle base
L
L
Fig.21
Spindle base
M
Fig.22
M
Fig.23
Mechanism base
(No.22013)1-29
UX-A7DVD
2.5 Cassette mechanism assembly section
2.5.1 Removing the Play/Record & Clear head
(See Fig.1~3)
(1) W hile moving the trigger arm o n the right side o f the head
mount in the direction of the arrow, turn the flywheel R
counterclockwise until the head mount comes ahead and
clicks.
(2) The head turns counterclockwise a s you turn the flyw heel
R counterclockwise(See Fig.2 and 3).
(3) Di sconnect the flexible wire from connector CN31 on the
head amplifier & mecha control board.
(4) Re mo v e the spring from the back of the head.
(5) Loosen the azimuth screw for reversing attaching the head.
(6) Remove the head on the front side of the head mount.
Cassette mechanism assembly
Fig.1
Head
Fly wheelR
Trigger armHead mount
Flexible wire
Fly wheel R
Fig.2
Azimuth screw
Head
for reversing
Spring
CN31
Head amplifer & mecha control board
Fig.3
1-30 (No.22013)
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