JVC KD-DV4200J User manual

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited No.MA248
2006/2
DVD/CD RECEIVER
MA24820062
KD-DV4200J,KD-DV4201E,KD-DV4201EU,
KD-DV4202E,KD-DV4202EU,KD-DV4203UI,
KD-DV4204UI,KD-DV4205U,KD-DV4205UN,
KD-DV4205UT,KD-DV4205A,KD-DV4206U,
KD-DV4206UN,KD-DV4206UT,KD-DV4206A,
KD-DV4207EE
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

1-2 (No.MA248)
SPECIFICATION
KD-DV4200
AUDIO AMPLIFIER SECTION
Power Output 17 W RMS ×4 Channels at 4 Ωand 1% THD+N
Signal to Noise Ratio 80 dBA (reference: 1 W into 4 Ω)
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Tone Control Range Bass ±10 dB at 100Hz
Treble ±10 dB at 10kHz
Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length : 660 nm
Output level : -21 dBm to -15 dBm
Line-Out Level/Impedance 2.0 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Color System NTSC
Video Output (composite) 1 Vp-p/75 Ω
Other Terminals CD changer
TUNER SECTION
Frequency Range FM 87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz)
87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz)
AM 530 kHz to 1 710 kHz (with channel interval set to 10 kHz)
531 kHz to 1 602 kHz (with channel interval set to 9 kHz)
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 35 dB
AM Tuner Sensitivity 20 µV
Selectivity 35 dB
DVD/CD PLAYER SECTION
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response DVD, fs=48 kHz 16 Hz to 22 000 Hz
DVD, fs=96 kHz 16 Hz to 44 000 Hz
VCD, CD, MP3, WMA 16 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 (MPEG Audio Layer 3) Bit Rate 32 kbps - 320 kbps
Sampling frequency MPEG-1 : 48 kHz, 44.1 kHz, 32 kHz
MPEG-2 : 24 kHz, 22.05 kHz, 16 kHz
WMA (Windows Media® Audio) Bit Rate 32 kbps -192 kbps
Sampling frequency 48 kHz, 44.1 kHz, 32 kHz
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C (32°F to 104°F)
Dimensions (W ×H ×D) Installation Size (approx.) 182 mm ×52 mm ×158 mm
(7-3/16" ×2-1/16" ×6-1/4")
Panel Size (approx.) 188 mm ×58 mm ×11 mm
(7-7/16" ×2-5/16" ×7/16")
Mass (approx.) 1.7 kg (3.7 lbs) (excluding accessories)

(No.MA248)1-3
KD-DV4201/KD-DV4202
AUDIO AMPLIFIER SECTION
Maximum Power Output Front/Rear 45 W per channel
Continuous Power Output
(RMS)
Front/Rear 17 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8% total har-
monic distortion
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Tone Control Range Bass/Treble ±10 dB at 100 Hz/±10 dB at 10 kHz
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length : 660 nm
Output level : -21 dBm to -15 dBm
Line-Out Level/Impedance 2.0 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Color System PAL
Video Output (composite) 1 Vp-p/75 Ω
Other Terminals CD changer, Steering wheel remote input
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz
AM (MW) 522 kHz to 1 620 kHz
(LW) 144 kHz to 279 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
MW Tuner Sensitivity/Selectivity 20 µV/35 dB
LW Tuner Sensitivity 50 µV
DVD/CD PLAYER SECTION
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response DVD, fs=48 kHz 16 Hz to 22 000 Hz
DVD, fs=96 kHz 16 Hz to 44 000 Hz
VCD/CD/MP3/WMA 16 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Bit Rate 32 kbps - 320 kbps
Sampling Frequency 48 kHz, 44.1 kHz, 32 kHz
WMA Bit Rate 32 kbps - 192 kbps
Sampling Frequency MPEG-1 : 48 kHz, 44.1 kHz, 33 kHz
MPEG-2 : 24 kHz, 22.05 kHz, 16 kHz
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C
Dimensions (W ×H ×D) Installation Size (approx.) 182 mm ×52 mm ×158 mm
Panel Size (approx.) 188 mm ×58 mm ×11 mm
Mass (approx.) 1.6 kg (excluding accessories)

1-4 (No.MA248)
KD-DV4203/KD-DV4204/KD-DV4205/KD-DV4206
AUDIO AMPLIFIER SECTION
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output
(RMS)
Front/Rear 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8%
total harmonic distortion
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Tone Control Range Bass/Treble ±10 dB at 100 Hz/±10 dB at 10 kHz
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length : 660 nm
Output level : -21 dBm to -15 dBm
Line-Out Level/Impedance 2.0 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Color System PAL/NTSC
Video Output (composite) 1 Vp-p/75 Ω
Other Terminal CD changer
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz
AM 531 kHz to 1 602 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
AM Tuner Sensitivity/Selectivity 20 µV/35 dB
DVD/CD PLAYER SECTION
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response DVD, fs=48 kHz 16 Hz to 22 000 Hz
DVD, fs=96 kHz 16 Hz to 44 000 Hz
VCD/CD/MP3/WMA 16 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Bit Rate 32 kbps - 320 kbps
Sampling Frequency 48 kHz, 44.1 kHz, 32 kHz
WMA Bit Rate 32 kbps - 192 kbps
Sampling Frequency MPEG-1 : 48 kHz, 44.1 kHz, 33 kHz
MPEG-2 : 24 kHz, 22.05 kHz, 16 kHz
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C
Dimensions (W ×H ×D) Installation Size (approx.) 182 mm ×52 mm ×158 mm
Panel Size (approx.) 188 mm ×58 mm ×11 mm
Mass (approx.) 1.6 kg (excluding accessories)

(No.MA248)1-5
KD-DV4207
AUDIO AMPLIFIER SECTION
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output
(RMS)
Front/Rear 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8%
total harmonic distortion
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Tone Control Range Bass/Treble ±10 dB at 100 Hz/±10 dB at 10 kHz
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length : 660 nm
Output level : -21 dBm to -15 dBm
Line-Out Level/Impedance 2.0 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Color System PAL
Video Output (composite) 1 Vp-p/75 Ω
Other Terminals CD changer
TUNER SECTION
Frequency Range FM1 /FM2 87.5 MHz to 108.0 MHz
FM3 65.00 MHz to 74.00 MHz
AM (MW) 522 kHz to 1 620 kHz
(LW) 144 kHz to 279 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
MW Tuner Sensitivity/Selectivity 20 µV/35 dB
LW Tuner Sensitivity 50 µV
DVD/CD PLAYER SECTION
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response DVD, fs=48 kHz 16 Hz to 22 000 Hz
DVD, fs=96 kHz 16 Hz to 44 000 Hz
VCD/CD/MP3/WMA 16 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Bit Rate 32 kbps - 320 kbps
Sampling Frequency 48 kHz, 44.1 kHz, 32 kHz
WMA Bit Rate 32 kbps - 192 kbps
Sampling Frequency MPEG-1 : 48 kHz, 44.1 kHz, 33 kHz
MPEG-2 : 24 kHz, 22.05 kHz, 16 kHz
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C
Dimensions (W ×H ×D) Installation Size (approx.) 182 mm ×52 mm ×158 mm
Panel Size (approx.) 188 mm ×58 mm ×11 mm
Mass (approx.) 1.6 kg (excluding accessories)

1-6 (No.MA248)
• "DVD Logo" is a trademark of DVD Format/Logo Licensing Corporation registered in the US, Japan and other countries.
• Microsoft and Windows Media are either registered trademarks or trademarks of Microsoft Corporation in the United States and/
or other countries.
• Manufactured under license from Dolby Laboratories. Dolby and the double-D symbol are trademarks of Dolby Laboratories.
• "DTS" and "DTS 2.0 + Digital Out" are registered trademarks of Digital Theater Systems, Inc.
• iPod is a trademark of Apple Computer, inc., registered in the U.S. and other countries.
• "SIRIUS" and the SIRIUS dog logo are registered trademarks of SIRIUS Satellite Radio Inc.
• XM and its corresponding logos are registered trademarks of XM Satellite Radio Inc.
• "SAT Radio," the SAT Radio logo and all related marks are trademarks of SIRIUS Satellite Radio Inc., and XM Satellite Radio, Inc.
• Design and specifi cations are subject to change without notice.

(No.MA248)1-7
SECTION 1
PRECAUTIONS
1.1 Safety Precautions
!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.
!Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.

1-8 (No.MA248)
1.2 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.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as 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 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.
1.3 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) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.4 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 before the flexible wire is disconnected from the connector on the DVD pickup unit.
(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 after connecting the flexible wire.
1M
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
Mechanism control board
CN101
Flexible wire
Short-circuit points

(No.MA248)1-9
1.5 Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : 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.CAUTION : The CD,MD and DVD 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 defeated. 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 here in may result in
hazardous radiation exposure.
REPRODUCTION AND POSITION OF LABELS
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
WARNING LABEL
CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
CLASS 1
LASER PRODUCT

1-10 (No.MA248)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MA248)1-11
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the front panel assembly
(See Fig.1)
Push the detach button in the lower left part of the front panel as-
sembly and remove the front panel assembly.
Fig.1
3.1.2 Removing the bottom cover
(See Fig.1)
Reference:
Remove the front panel assembly as required.
(1) Release the two joints a, two joints band joint c.
(2) Remove the bottom cover from the main body.
Caution:
Do not damage the main board when releasing the joints using
a screwdriver or a similar tool.
Fig.2
3.1.3 Removing the front chassis assembly
(See Fig.3)
• Remove the front panel assembly and bottom cover.
(1) From the both sides of the main body, remove the two
screws Aattaching the front chassis assembly.
(2) Release the two joints dand two joints e.
Fig.3
Detach button
Front panel assembly
Bottom cover
b
b
a
a
c
d
d
Front chassis assembly
A
e
e
A

1-12 (No.MA248)
3.1.4 Removing the side heat sink
(See Fig.4)
Reference:
Remove the front panel and front chassis assemblies as re-
quired.
From the left side of the main body, remove the two screws Band
three screws Cattaching the side heat sink.
Fig.4
3.1.5 Removing the rear bracket
(See Fig.5)
• Remove the bottom cover.
(1) From the back side of the main body, remove the screws
D, screw E, tow screws F, three screws Gand screw Hat-
taching the rear bracket.
(2) Remove the rear bracket.
Reference:
The quantity of screws Ddiffers by each model.
Fig.5
B
CSide heat sink
Rear bracket
F
G
E
G
G
DH
D
Rear bracket
F
G
D
Cable holder
E
G
G
DH
D
(For KD-DV4201 and KD-DV4202)

(No.MA248)1-13
3.1.6 Removing the main board
(See Figs.5 and 6)
• Remove the front panel assembly, bottom cover, front chassis
assembly and side heat sink.
Reference:
Remove the rear bracket as required.
(1) From the back side of the main body, remove the three
screws Gattaching the main board. (See Fig.5.)
(2) From the bottom side of the main body, remove the three
screws Jattaching the main board. (See Fig.6.)
(3) Disconnect the connector CN961 on the main board from
the DVD mechanism assembly and take out the main
board from the main body. (See Fig.6.)
Fig.6
3.1.7 Removing the DVD mechanism assembly
(See Fig.7)
• Remove the front panel assembly, bottom cover, front chassis
assembly, side heat sink and main board.
(1) From the inside of the top chassis, remove the three
screws Kattaching the DVD mechanism assembly.
(2) Take out the DVD mechanism assembly from the top chas-
sis.
Fig.7
CN961
J
J
Main board
J
KK
K
DVD mechanism assembly
Top chassis

1-14 (No.MA248)
3.1.8 Removing the main sub board
(See Figs.8 to 10)
• Remove the front panel assembly, bottom cover, front chassis
assembly, side heat sink, main board and DVD mechanism as-
sembly.
(1) From the top side of the DVD mechanism assembly, re-
move the two screws Mattaching the dust cover. (See
Fig.8.)
(2) Remove the dust cover from the DVD mechanism assem-
bly. (See Fig.8.)
Reference:
When attaching the dust cover, align the joints fin the
holes of the dust cover before attaching the screws M.
(See Fig.8.)
(3) Release the lock of the connector CN962 on the main sub
board and disconnect the card wire. (See Fig.9.)
(4) Bend the joint gin the direction of the arrow. (See Fig.9.)
(5) Remove the two screws Nattaching the main sub board
and remove the main sub board from the DVD mechanism
assembly. (See Fig.9.)
Reference:
• When attaching the main sub board, align the joints hin the
holes of the main sub board before attaching the screws N.
(See Fig.9.)
• When the resolution of DVD mechanism assembly is done
sequentially, remove the two screws Pattaching the support
bracket. (See Fig.10.)
• Remove the card wire from the connector CN401 as re-
quired. (See Fig.10.)
Fig.8
Fig.9
Fig.10
M
M
DVD mechanism assembly
Dust cover
f
f
g
N
h
h
CN962
Lock
Main sub board
DVD mechanism assembly
P
Support bracket
CN401

(No.MA248)1-15
3.1.9 Removing the switch board
(See Figs. 11 to 13)
• Remove the front panel assembly.
(1) From the back side of the front panel assembly, remove the
four screws Qattaching the rear cover. (See Fig.11.)
(2) Release the joints jattaching the rear cover to the front
panel assembly. (See Fig.12.)
(3) Release the joint kand take out the switch board while lift-
ing the switch board from the front panel assembly little by
little. (See Fig.13.)
Reference:
Remove the volume knob from the front side of the front panel
assembly at the same time.
Note:
Do not lose the compression springs when removing the
switch board. (See Fig.13.)
Fig.11
Fig.12
Fig.13
Q
Q
Q
Joints jJoints j
Joints j
Joints j
Rear cover
Switch board Joint k
Front panel assembly

1-16 (No.MA248)
3.2 DVD mechanism assembly
3.2.1 Removing the mechanism control board
(See Fig.1)
Caution:
Before disconnecting the flexible wire extending from the DVD
pickup, solder the short-circuit point on the flexible wire using
a grounding soldering iron. If you do not follow this instruction,
the DVD pickup may be damaged.
(1) Turn over the body, and solder the short-circuit points on
the flexible wire extending from the DVD pickup.
(2) Disconnect the flexible wire from connector CN101 on the
mechanism control board.
(3) Disconnect the card wire from connector CN201 on the
mechanism control board.
(4) Disconnect the flexible wire from connector CN202 on the
mechanism control board.
(5) Unsolder two soldered points aon the mechanism control
board and remove the wire extending from the feed motor.
(6) Remove the screw Aattaching the lug wire.
(7) Remove the two screws Band screw Cattaching the
mechanism control board.
Caution:
• As the flexible wire to be connected to CN101, make sure to
attach it to the mechanism control board using a double
tape.
• After reassembling, unsolder the short-circuit points.
Fig.1
Double tape
Feed motor
Mechanism control board
CN202
CN101
B
a
C
B
CN201
Flexible wire
Short-circuit points
A
Lug wire

(No.MA248)1-17
3.2.2 Removing the top cover
(See Fig.2)
(1) Remove the two screws Dattaching the top cover on the
back of the body.
(2) Remove the top cover upward.
Reference:
When reassembling, set part bof the top cover under the
bending part cof the chassis frame.
3.2.3 Removing the mechanism section
(See Fig.2 to 4)
• Remove the top cover.
(1) From the bottom of the body, remove the screw Eattaching
the lug wire. (See Fig.2.)
(2) Remove the two screws Fattaching the right and left stop-
pers on the front side. (See Fig.2.)
(3) Remove the two floating springs on the bottom of the body.
(See Fig.3.)
(4) Move the mechanism section upward and remove from the
chassis frame.
The three damper springs come off from the dampers.
(See Fig.4.)
Caution:
• When reassembling, reattach the damper spring to the
damper respectively and insert the three shafts on the bot-
tom of the mechanism to the dampers.
• Before inserting the shaft to the dampers, apply IPA to the
hole of damper.
Fig.2
Fig.3
Fig.4
D
Top cover
Stopper
Stopper
F
F
b
cE
Lug wire
D
Floating spring
Mechanism section
Damper (R)
(Purple)
Damper (F)
(Black)
Damper (F)
(Black)
Chassis frame
Damper SP.(F)
(Silver)
Damper SP.(F)
(Silver)
Damper SP.(R)
(Red)

1-18 (No.MA248)
3.2.4 Removing the clamper unit
(See Fig.5 to 7)
• Remove the top cover and the mechanism section.
(1) Remove the clamper2 spring on the bottom of the mecha-
nism section. (See Figs.5.and 6.)
(2) Release the part dof the clamper spring from the bending
part of the chassis base assembly. (See Fig.7.)
(3) Move the clamper unit in the direction of the arrow and turn.
Release the two joints eand f, then remove the clamper
unit upward. (See Fig.6.)
3.2.5 Reattaching the clamper unit
(See Fig.5 to 9)
(1) Attach the clamper spring to the clamper unit. (See Fig.8.)
(2) Move the clamper unit to set the side joints eand f to each
boss of the chassis base assembly. Make sure that part g
is inserted to the notch of the chassis base assembly. (See
Figs.5 and 9.)
(3) Move the part dof the clamper spring to the outside of the
bending part of the chassis base assembly. (See Fig.7.)
(4) Attach the clamper2 spring to the chassis base assembly.
(See Figs.5 and 6.)
Caution:
When reattaching, temporarily hook the end of the clamper
spring as shown in the figure to make the work easy. (See
Fig.8.)
Fig.5
Fig.6
Fig.7
Clamper unit
Clamper spring
Clamper2 spring
g
f
e
Chassis base assembly
Clamper2 spring
Chassis base assembly
Clamper spring
Chassis base assembly
d

(No.MA248)1-19
Fig.8
Fig.9
Clamper unit
Clamper spring
Notch
g
Clamper unit

1-20 (No.MA248)
3.2.6 Removing the front unit
(See Fig.10 to 12)
• Remove the top cover and the mechanism section.
(1) Disconnect the flexible wire from connector CN202 on the
mechanism control board at the bottom of the body. (See
Fig.10.)
(2) Remove the screw Gattaching the front unit on the top of
the body. (See Fig.11.)
(3) Move the front unit toward the front to release joint h, and
release two joints iand jon the right side of the chassis
base assembly. Then remove the front unit upward. (See
Figs.11 and 12.)
(4) Remove the two screws Hattaching the switch board. (See
Fig.12.)
Reference:
You can remove the switch board only without removing the
front unit.
Caution:
When reassembling, attach the flexible wire extending from
the switch board using the double tape. (See Figs.10 and 12.)
Fig.10
Fig.11
Fig.12
Mechanism control board
Flexible wire
CN202
Double tape
G
Front unit
h
h
Front unit
Switch board
j
G
H
i
Double tape