JVC EX-A1 User manual

SERVICE MANUAL
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MB150
2004/3
COMPACT COMPONENT SYSTEM
MB15020043
EX-A1
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
Area suffix
J ----------------------------- U.S.A.
C -------------------------- Canada
CA-EXA1SP-EXA1 SP-EXA1

1-2 (No.MB150)
SPECIFICATION
Designs and Specifications are subject to change without notice.
General Power source AC 120 V 60 Hz
Power consumption 24 W (in operation)
0.8 W (on standby)
Weight 3.0 kg (6.7 lbs)
External dimensions (W ×H ×D) 232 mm ×100 mm ×269 mm (9 3/16 inches ×3 15/16 inches ×10 5/8 inches)
DVD player Playable discs DVD VIDEO, DVD AUDIO, VCD, Super VCD, CD, CD-R/RW (CD, VCD, MP3, JPEG
format), DVD-R/ RW (video format)
Video output Color system NTSC
Horizontal resolution 500 lines
Composite ×1 1.0 V (p-p)/75 C, synchronization negative
S-video ×1 Y output: 1.0 V (p-p)/75 Ω, synchronization negative
C output: 0.286 V (p-p)/75 Ω
Component ×1 Y output: 1.0 V (p-p)/75 Ω
PB/PR output: 0.7 V (p-p)/75 Ω
Audio output Analog sound output Speakers ×2
Output power 30 W per channel, min. RMS, at 4 C at 1 kHz with no more than
10% total harmonic distortion
Fitting impedance 4 Ωto 16 Ω
Headphones ×1 11 mW/32 Ω
Fitting impedance 16 Ωto 1 kΩ
Subwoofer ×1 500 mVrms/10 kΩ
Digital sound output Optical ×1 -21 dBm to -15 dBm
Other output AV COMPU LINK ×2 (Ø3.5)
Audio input Sound input AUX ×1
Level 1 250 mV/50 kΩ
Level 2 500 mV/50 kΩ
Tuner FM tuner Receiving frequency 87.5 MHz to 108.0 MHz
Antenna 75Ω- unbalanced type
AM tuner Receiving frequency 530 kHz to 1710 kHz
Antenna External antenna jack (loop antenna)
Speaker Type 1-way bass-reflex type
Magnetically shielded type
Speaker 8cm (3 3/16 inches) cone M 1
Power handling capacity 30 W
Impedance 4Ω
Sound pressure level 81 dB/W m
Dimension (W ×H ×D) 120 mm ×161 mm ×239 mm (43/4 inches ×6 3/8 inches ×9 7/16 inches)
Weight (1 unit) 1.6 kg (3.6 lbs)

(No.MB150)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. 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 per-
formed 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 characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice 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 charac-
teristics 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 reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna 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, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent 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, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-
posed 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 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 pre-
forming 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)
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

1-4 (No.MB150)
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 laser products.
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.
1.6 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 pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible
wire is disconnected without applying solder, the 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
Traverse mechanism assembly
Pickup
Short land section
Card wire
Connector

(No.MB150)1-5
1.8 Importance administering point on the safety
Caution: For continued protection against risk of
fire, replace only with same type 6A/125V for
F2401.
This symbol specifies type of fast operating fuse.
Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F2401 comme le meme type
que 6A/125 V.
Ce sont des fusibles suretes qui functionnes rapide.
^
Main board
6A-125V
F2401

1-6 (No.MB150)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB150)1-7
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the top cover
(See Fig.1)
(1) From the top side of the main body, remove the four screws
Aattaching the top cover.
Fig.1
3.1.2 Removing the AL panel L and AL panel R
(See Figs.2 to 7.)
• Remove the top cover.
(1) Remove the two screws B, screw Cand screw C' attaching
the bridge A. (See Fig.2.)
Reference:
When attaching the screw C' attach the lug wire with it.
(See Fig.2.)
(2) Remove the two screws Cattaching the bridge B. (See
Fig.2.)
(3) Remove the screw Cand screw C' attaching the bridge C.
(See Fig.2.)
Reference:
When attaching the screw C' attach the lug wire with it.
(See Fig.2.)
(4) From the back side of the main body, remove the three
screws Dattaching the bridge C. (See Fig.3.)
(5) From the top side of the main body, remove the two screws
Eattaching the AL panel L and AL panel R. (See Fig.4.)
(6) From the bottom side of the main body, remove the three
screws Fattaching the wood bar. (See Fig.5.)
(7) Remove the six screws Gand two screws Hattaching the
AL panel L and AL panel R. (See Fig.6.)
(8) Remove the AL panel L and AL panel R in the direction of
the arrow 2 while extending the back section of the AL pan-
el L and AL panel R in the direction of the arrow 1. (See
Fig.7.)
Fig.2
A A
A
Top cover
Lug wire
BBridge A
C
C'
C'
C
C
C
Bridge B
Bridge C

1-8 (No.MB150)
Fig.3
Fig.4
Fig.5
Fig.6
Fig.7
D
E
AL panel R
A
L panel L
F
Wood ba
r
AL panel L
GG
H H
AL panel R
AL panel LAL panel R
1
1
11
1
1
2 2

(No.MB150)1-9
3.1.3 Removing the front panel assembly
(See Fig.8)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
(1) Removing the three screws Jattaching the front panel as-
sembly. (See Fig.8.)
(2) Release the claws aattaching the front panel assembly
and remove the front panel assembly in the direction of the
arrow. (See Fig.8.)
Note:
When attaching the front panel assembly, confirm that the con-
nector CN804 on the front board is disconnected in the con-
nector CN704 on the micom board certainly.
Fig.8
3.1.4 Removing the rear panel
(See Fig.9.)
(1) From the back side of the main body, remove the sixteen
screws Kand screw Lattaching the rear panel.
3.1.5 Removing the switching power unit
(See Figs.9 and 10)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
Reference:
Remove the rear panel as required.
(1) From the back side of the main body, remove the screw L
attaching the switching power unit. (See Fig.9.)
(2) From the right side of the main body, remove the wire from
the connector CN201 on the main board. (See Fig.10.)
(3) Remove the screw Mattaching the switching power unit.
(See Fig.10.)
(4) Take out the switch power supply unit from the main body
in the direction of the arrow. (See Fig.10.) Fig.9
Fig.10
J
Claw aClaw a
Front panel assembly
J
CN804
CN704
K
KL Rear panel
MSwitching power unit
CN201 Main board
Wire

1-10 (No.MB150)
3.1.6 Removing the tuner
(See Figs.11 and 12)
• Remove the top cover.
• Remove the rear panel.
(1) From the top side of the main body, remove the screw N
and screw N' attaching the bridge C. (See Fig.11.)
Reference:
When attaching the screw N', attach the lug wire with it.
(See Fig.11.)
(2) Release the claws band take out the tuner from the main
body. (See Fig.12.)
(3) Disconnect the card wire from the connector CN1 on the
tuner. (See Fig.12.)
Fig.11
Fig.12
3.1.7 Removing the headphone board
(See Fig.13)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
• Remove the front panel assembly.
(1) From the left side of the main body, disconnect the wire
from the connector CN401 on the main board.
(2) Remove the screw Pattaching the headphone board.
(3) Remove the engagement section ctoward you, remove the
headphone board from the joint cin the direction of the ar-
row.
Fig.13
Lug wire Bridge C
N
N'
Claw bTuner Claw b
Card wire
CN1
Joint d
Headphone
board
CN401
Main board
P
c

(No.MB150)1-11
3.1.8 Removing the main board
(See Figs.14 and 15)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
• Remove the rear panel.
• Remove the switching power unit.
Reference:
Remove the front panel assembly as required.
(1) From the top side of the main body, disconnect the card
wires from the connectors CN202 and CN204 on the main
board. (See Fig.14.)
(2) Disconnect the wires from the connectors CN205 and
CN401 on the main board. (See Fig.14.)
(3) Disconnect the wire from the connector CN706 on the mi-
com board. (See Fig.14.)
(4) Disconnect the wires from the connectors CN310 and
CN312 on the digital amplifier board assembly. (See
Fig.14.)
(5) Remove the screw Qattaching the lug wire to the bracket
A. (See Fig.14.)
(6) Remove the spacer fixing the lug wire. (See Fig.15.)
(7) Remove the four screws Rattaching the main board and
remove the main board from the main body. (See Fig.15.)
Reference:
When attaching the main board, attach the screw Rafter fitting
the hole of the main board to the joints eand f of the main
body. (See Fig.15.)
Fig.14
Fig.15
Main board
Micom board
CN204
CN205
CN202
CN401
CN312
CN310
Wire
Card wire
Card wire
Wire
Wires
Digital amplifier
board assembly
CN706
Lug wire
Q
Bracket
A
Main board
R
R
R
Spacer
Joints f
Joints e
Lug wire

1-12 (No.MB150)
3.1.9 Removing the micom board
(See Figs.16 and 17)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
• Remove the front panel assembly.
• Remove the rear panel.
• Remove the switching power unit.
• Remove the main board.
(1) From the top side of the main body, disconnect the card
wires from the connectors CN631 and CN701 on the mi-
com board. (See Fig.16.)
(2) Disconnect the wire from the connector CN703 on the mi-
com board. (See Fig.16.)
(3) Disconnect the card wire from the connector CN705 on the
micom board and take out the tuner after releasing the
claws gof the tuner holder. (See Fig.16.)
Reference:
Remove the tuner as required.
(4) Disconnect the wire from the connector CN311 on the dig-
ital amplifier board assembly. (See Fig.16.)
(5) Disconnect the card wire from the connector CN601 on the
main board. (See Fig.17.)
(6) Remove the two screws Sand screw S' attaching the mi-
com board. (See Fig.17.)
Reference:
• When attaching the screw S', attach the bracket D with it.
(See Fig.17.)
• When attaching the micom board, attach the screw Sand
screw S' after fitting the hole of the main board to the joints
(h,i,j,k) of the main body. (See Fig.17.)
Fig.16
Fig.17
Card wires Wire
Card wire
CN631
CN703
CN701
CN311
Wire
Tuner
CN705
Joints g
Tuner holder
Digital amplifier board assembly
Micom board
Micom board
Bracket D
Joints h
S'
Micom
board
Joint i
Micom board
Joint j
S
S
Micom board
Joint k
CN601
Card wire

(No.MB150)1-13
3.1.10 Removing the digital amplifier board
(See Figs.18 to 20)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
• Remove the front panel assembly.
• Remove the rear panel.
• Remove the switching power unit.
• Remove the main board.
• Remove the micom board.
(1) From the back side of the main body, disconnect the card
wire from the connector CN313 on the digital amplifier
board assembly. (See Fig.18.)
Reference:
When connecting the wire, connect the wire to connector
CN313 on the digital amplifier board assembly after pass
it through the section mof the side cover L. (See Fig.18.)
(2) From the top side of the main body, remove the two screws
Tand two screws Uattaching the bracket C. (See Fig.18.)
(3) Take out the bracket C with the headphone board from the
main body.
Reference:
When attaching the bracket C to the bottom chassis, at-
tach it after fitting the hole to the projections nof the bot-
tom chassis. (See Fig.18.)
(4) Take out the digital amplifier board assembly.
(5) Release the joints (p,q,r) of the deus case A and deus case
B, and remove the deus case A in the direction of the ar-
row. (See Fig.19.)
(6) Remove the screw Vattaching the heat sink. (See Fig.20.)
(7) Remove the solder from the soldered sections (s,t) attach-
ing the digital amplifier board to the deus case B and bend
the joints (u,v) in the direction of the arrow. (See Fig.20.)
(8) Take out the digital amplifier board from the deus case B.
Reference:
When attaching the digital amplifier board to the deus case B,
fit the joints (u,v,w,x) of the deus case B to the hole of the dig-
ital amplifier board. (See Fig.20.)
Fig.18
Fig.19
Fig.20
CN313
Wire
m
Side cover L T
T
U
Digital amplifier board assembly
Bracket C
U
Headphone board
Projections n
Bottom chassis
Joints p
Joints r
Joints q
Deus case A
Deus case B
V
Digital amplifier board
Heat sink
Solder
section s
Joint u
Joint v
Joint x
Deus case B
Solder
section t
Joint w

1-14 (No.MB150)
3.1.11 Removing the speaker terminal board
(See Fig.21.)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
• Remove the front panel assembly.
• Remove the rear panel.
• Remove the switching power unit.
• Remove the main board.
• Remove the micom board.
(1) From the back side of the main body, disconnect the wire
from the connector CN313 on the digital amplifier board as-
sembly.
Reference:
When connecting the wire, connect the wire to connector
CN313 on the digital amplifier board assembly after pass
it through the section mof the chassis. (See Fig.18.)
(2) From the top side of the main body, remove the screw W
attaching the speaker terminal board.
Reference:
• When attaching the speaker terminal board, attach the
screw Wafter fitting the hole of the speaker terminal board
to the joint yof the side cover R.
• After attaching the speaker terminal board, fix the wire and
fan motor wire with the wire holder.
3.1.12 Removing the component video terminal board
(See Fig.21)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
• Remove the front panel assembly.
• Remove the rear panel.
• Remove the switching power unit.
• Remove the main board.
• Remove the micom board.
(1) From the top side of the main body, remove the screw Xat-
taching the component video terminal board.
Reference:
When attaching the component video terminal board, at-
tach the screw Xafter fitting the hole of the component
video terminal board to the joint zof the side cover L.
Fig.21
3.1.13 Removing the DVD mechanism assembly
(See Fig.22.)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
• Remove the front panel assembly.
• Remove the rear panel.
• Remove the switching power unit.
• Remove the main board.
• Remove the micom board.
(1) From the top side of the main body, remove the three
screws Yattaching the DVD mechanism assembly.
(2) Take out the DVD mechanism assembly from the bottom
chassis.
Fig.22
W
Side cover R
X
Side cover L
Digital amplifier board assembly
Joint z
Speaker terminal board
Joint y
Wire holder
Fan motor wire
m
Component video terminal board
CN313
Wire
Y
Y
DVD mechanism assembly
YBottom chassis

(No.MB150)1-15
3.1.14 Removing the fan motor
(See Figs.21,23 and 24)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
• Remove the rear panel.
• Remove the switching power unit.
• Remove the main board.
(1) From the top side of the main body, disconnect the wire
from the connector CN703 on the micom board. (See
Fig.23.)
(2) From the back side of the main body, remove the two
screws Zattaching the fan motor to the bracket B. (See
Fig.24.)
(3) Take out the fan motor from the back side of the main body.
Reference:
After attaching the fan motor, fix the wire with the wire holder.
(See Fig.21.)
Fig.23
Fig.24
Wire CN703
Micom board
Fan motor
Z
Z
Bracket B

1-16 (No.MB150)
3.1.15 Removing the front board
(See Figs.25 and 26)
• Remove the top cover.
• Remove the AL panel L and AL panel R.
• Remove the front panel assembly.
(1) From the forward side of the front panel assembly, pull out
the volume assembly. (See Fig.25.)
(2) From the reverse side of the front panel assembly, remove
the ten screws AA attaching the front board. (See Fig.26.)
(3) Release the two claws aa of the indicator attaching the
front board and take out the front board from the front panel
assembly. (See Fig.26.)
Reference:
When attaching the front board, attach the screw AA after fit-
ting the hole of the front board to the projections ab of the front
panel assembly. (See Fig.26.)
Fig.25
Fig.26
Volume assembly
Front panel assembly
Projection ab
Front board
Front panel assembly
AA AA
AA
AA
Projection ab
Projection ab
Projections ab
Claws aa

(No.MB150)1-17
3.2 DVD mechanism section
• Remove the DVD mechanism assembly from the main body.
(See "3.1.13 Removing the DVD mechanism assembly".)
3.2.1 Removing the tray assembly
(See Figs.1 to 3)
(1) From the right side of the DVD mechanism assembly, push
the slide cam and pull the tray assembly out of the DVD
mechanism assembly in the direction of the arrow. (See
Fig.1.)
(2) From the top side of the DVD mechanism assembly,
remove the two screws Aattaching the leaf spring to the
bushing and remove the leaf spring. (See Fig.2.)
(3) Remove the bushing of the tray assembly from the
projection aon the DVD mechanism assembly and move
the tray assembly in the direction of the arrow. (See Fig.3.)
(4) Remove the claw bof the tray assembly from the DVD
mechanism assembly and take out the tray assembly. (See
Fig.3.)
Fig.1
Fig.2
Fig.3
Tray assembly DVD mechanism assembly
Slide cam
Bushing
Leaf spring
A
DVD mechanism assembly
Bushing
Claw b
Projection a
Tray assembly
DVD mechanism assembly

1-18 (No.MB150)
3.2.2 Removing the traverse mechanism assembly
(See Figs.4)
(1) From the bottom side of the DVD mechanism assembly,
remove the four screws Battaching the traverse
mechanism assembly and take out the DVD traverse
mechanism assembly with the DVD servo board.
Fig.4
3.2.3 Removing the DVD servo board
(See Figs.5 and 6)
• Remove the traverse mechanism assembly.
(1) From the side of the traverse mechanism assembly, solder
the short land sections con the pickup. (See Fig.5.)
(2) From the bottom side of the traverse mechanism
assembly, release the lock of the connector CN101 on the
DVD servo board in the direction of the arrow 1 and
disconnect the card wire. (See Fig.6.)
Caution:
• Solder the short land sections con the pickup before
disconnecting the card wire from the connector CN101
on the DVD servo board. If the card wire is
disconnected without attaching solder, the pickup may
be destroyed by static electricity. (See Figs.5 and 6.)
• When attaching the DVD servo board, be sure to
remove solders from the short land sections cafter
connecting the card wire to the connector CN101 on
the DVD servo board. (See Figs.5 and 6.)
(3) Disconnect the card wire from the connector CN201 on the
DVD servo board. (See Fig.6.)
(4) Remove the two screws Cattaching the DVD servo board.
(See Fig.6.)
(5) Remove the DVD servo board from the engagement
section din an upward and remove the engagement
section fin the direction 3 while removing the engagement
section ein the direction of the arrow 2. (See Fig.6.)
Fig.5
Fig.6
DVD mechanism assembly
Traverse mechanism assembly
DVD servo board
BB
Traverse mechanism assembly
Pickup
Short land section c
Card wire Card wire
DVD servo board
Traverse mechanism assembly
CN101
CN201
11
23
C
C
f
e
d

(No.MB150)1-19
3.2.4 Removing the pickup
(See Figs.5,7 to 9)
• Remove the traverse mechanism assembly.
(1) From the side of the traverse mechanism assembly, solder
the short land sections con the pickup. (See Fig.5.)
(2) Release the lock of the connector on the pickup in the
direction of the arrow and disconnect the card wire. (See
Fig.7.)
Caution:
• Solder the short land sections con the pickup before
disconnecting the card wire from the connector on the
pickup. If the card wire is disconnected without
attaching solder, the pickup may be destroyed by
static electricity. (See Figs.5 and 7.)
• When attaching the pickup, be sure to remove solders
from the short land sections cafter connecting the
card wire to the connector on the pickup. (See Figs.5
and 7.)
(3) Remove the screw Dattaching the plate and thrust spring.
(See Fig.7.)
(4) Remove the engagement section gattaching the plate to
the feed holder and remove the plate with the thrust spring.
(See Fig.7.)
(5) Remove the shaft of the pickup from the section hon the
traverse mechanism assembly and remove the shaft from
the section iwhile moving it in the direction of the arrow.
(See Fig.8.)
(6) Remove the pickup from the section jof the traverse
mechanism assembly and take out the pickup with the
shaft. (See fig.8.)
(7) From the bottom side of the pickup, remove the two screws
Eattaching the SW actuator and LEAD spring. (See
Fig.99.)
(8) Pull the shaft out of the pickup. (See Fig.9.)
Fig.7
Fig.8
Fig.9
Thrust spring
Pickup
Connector
Plate
Card wire
Feed holder
D
g
Shaft
Pickup
Traverse mechanism assembly
h
i
j
Pickup
SW actuator
LEAD spring
E
Shaft

1-20 (No.MB150)
3.2.5 Attaching the pickup
(See Figs.5,7 to 10)
• See "3.2.4 Removing the pickup".
(1) Attach the shaft, SW actuator and LEAD spring to the
pickup. (See Fig.9.)
(2) Align the pickup to the section jof the traverse mechanism
assembly first, and set the both ends of the shaft of the
pickup in the sections gand i of the traverse mechanism
assembly. (See Fig.8.)
(3) Attach the plate and thrust spring. (See Fig.7.)
(4) Remove solders from the short land sections cafter
connecting the card wire to the connector on the pickup.
(See Figs.5 and 7.)
(5) Turn the feed gear Min the direction of the arrow 1 to move
the pickup in the direction of the arrow 2. (See Fig.10.)
Fig.10
3.2.6 Removing the feed motor
(See Figs.7,11 and 12)
• Remove the traverse mechanism assembly.
(1) From the top side of the traverse mechanism assembly,
remove the screw Dattaching the plate and thrust spring.
(See Fig.7.)
(2) Remove the engagement section gattaching the plate to
the feed holder and remove the plate with the thrust spring.
(See Fig.7.)
(3) Remove the wires from the soldered section kon the
spindle motor board. (See Fig.11.)
Reference:
When attaching the feed motor, pass the wire through
the section mon the spindle base. (See Fig.11.)
(4) Remove the feed holder, feed motor, lead screw, feed gear
Eand feed gear Mat the same time after removing the two
screws Fattaching the feed holder. (See Fig.11.)
(5) From the side of the feed holder, remove the two screws G
attaching the feed motor. (See Fig.12.)
Fig.11
Fig.12
Feed gear M
Pickup
1
2
Spindle motor board
Spindle base
Feed holder
Feed gear E
Feed gear M
Feed motor
Lead screw
Wires
F
F
m
k
Feed holder
G