JVC KD-APD89J User manual

SERVICE MANUAL
COPYRIGHT © 2008 Victor Company of Japan, Limited No.MA392<Rev.002>
2008/7
CD RECEIVER
MA392<Rev.002>20087SERVICE MANUAL
KD-APD89J, KD-PDR80J, KD-PDR61E,
KD-PDR61EX, KD-PDR61EY, KD-G844UI,
KD-G845U, KD-G845UN, KD-G845UT,
KD-G845UH, KD-G847EE, KD-PDR89UR,
KD-PDR62E, KD-PDR62EX, KD-PDR62EY
COPYRIGHT © 2008 Victor Company of Japan, Limited
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
(KD-APD89)
(KD-PDR80)
(KD-PDR89)
(KD-APD89)
(KD-PDR80)
(KD-PDR89)
(KD-APD89)
(KD-PDR80)
(KD-PDR89)
(KD-PDR61)
(KD-PDR62)
(KD-G847)

1-2 (No.MA392<Rev.002>)
SPECIFICATION
KD-APD89/KD-PDR80/KD-PDR89
Design and specifications are subject to change without notice.
AUDIO AMPLIFIER SECTION
Power Output 20 W RMS ×4 Channels at 4 Ωand < or = 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 ±12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz)
Mid-range ±12 dB (500 Hz, 1.0 kHz, 1.5 kHz, 2.5 kHz)
Treble ±12 dB (10.0 kHz, 12.5 kHz, 15.0 kHz, 17.5 kHz)
Frequency Response 40 Hz to 20 000 Hz
Line-Out Level/Impedance KD-APD89 5.0 V/20 kΩload (full scale)
KD-PDR80 2.5 V/20 kΩload (full scale)
Subwoofer-Out Level/Impedance KD-APD89 5.0 V /20 kΩload (full scale)
KD-PDR80 2.5 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Other Terminal
CD changer jack, AUX (auxiliary) input jack, USB input jack, Steer-
ing wheel remote input (only for KD-APD89), Antenna input
TUNER SECTION
Frequency Range FM
with channel interval set to 100 kHz or 200 kHz: 87.5 MHz to 107.9 MHz
with channel interval set to 50 kHz: 87.5 MHz to 108.0 MHz
AM with channel interval set to 10 kHz: 530 kHz to 1 710 kHz
with channel interval set to 9 kHz: 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 35 dB
AM Tuner Sensitivity 20 µV
Selectivity 35 dB
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format: (MPEG1/2 Audio Layer 3) Max. Bit Rate: 320 kbps
WMA (Windows Media® Audio) Decoding Format Max. Bit Rate: 192 kbps
USB SECTION
USB Standards USB 1.1, USB 2.0
Data Transfer Rate Full Speed Maximum 12 Mbps
Low Speed Maximum 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Playable Audio Format MP3/WMA/WAV
Max. Current 500 mA/5 V
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):
(approx.)
Installation Size 182 mm ×52 mm ×160 mm (7-3/16” ×2-1/16” ×6-5/16”)
Panel Size 188 mm ×58 mm ×6 mm (7-7/16” ×2-5/16” ×1/4”)
Mass 1.4 kg (3.1 lbs) (excluding accessories)

(No.MA392<Rev.002>)1-3
KD-PDR61/KD-PDR62
Design and specifications are subject to change without notice.
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 ±12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz)
Mid-range ±12 dB (500 Hz, 1.0 kHz, 1.5 kHz, 2.5 kHz)
Treble ±12 dB (10.0 kHz, 12.5 kHz, 15.0 kHz, 17.5 kHz)
Frequency Response 40 Hz to 20 000 Hz
Signal to Noise Ratio 70 dB
Audio Output Level Line-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Subwoofer-Out Level/Impedance 2.5 V /20 kΩload (full scale)
Other Terminals CD changer jack, AUX (auxiliary) input jack, USB input
jack, Aerial input, 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
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format: (MPEG1/2 Audio Layer 3) Max. Bit Rate 320 kbps
WMA (Windows Media® Audio) Decoding Format Max. Bit Rate 320 kbps
USB SECTION
USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Full Speed Max. 12 Mbps
Low Speed Max. 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Playable Audio Format MP3/WMA/WAV
Max. Current 500 mA/5V
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 ×160 mm
Panel Size (approx.) 188 mm ×58 mm ×12 mm
Mass (approx.) 1.4 kg (excluding accessories)

1-4 (No.MA392<Rev.002>)
KD-G844
Design and specifications are subject to change without notice.
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 ±12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz)
Mid-range ±12 dB (500 Hz, 1.0 kHz, 1.5 kHz, 2.5 kHz)
Treble ±12 dB (10.0 kHz, 12.5 kHz, 15.0 kHz, 17.5 kHz)
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out and Subwoofer-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Other Terminal CD changer jack, AUX (auxiliary) input jack, USB input
jack, Antenna input
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
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format: (MPEG1/2 Audio Layer 3) Max. Bit Rate 320 kbps
WMA (Windows Media ® Audio) Decoding Format Max. Bit Rate 192 kbps
USB SECTION
USB Standard USB 1.1, USB 2.0
Data Transfer Rate Full Speed: Max. 12 Mbps
Low Speed: Max. 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Playable Audio Format MP3/WMA/WAV
Max. Current 500 mA/5 V
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): (approx.) Installation Size 182 mm ×52 mm ×160 mm
Panel Size 188 mm ×58 mm ×6 mm
Mass 1.4 kg (excluding accessories)

(No.MA392<Rev.002>)1-5
KD-G845
Design and specifications are subject to change without notice.
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 ±12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz)
Mid-range ±12 dB (500 Hz, 1.0 kHz, 1.5 kHz, 2.5 kHz)
Treble ±12 dB (10.0 kHz, 12.5 kHz, 15.0 kHz, 17.5 kHz)
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out and Subwoofer-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Other Terminal CD changer jack, AUX (auxiliary) input jack, USB input
jack, Antenna input
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
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format: (MPEG1/2 Audio Layer 3) Max. Bit Rate 320 kbps
WMA (Windows Media® Audio) Decoding Format Max. Bit Rate 192 kbps
USB SECTION
USB Standard USB 1.1, USB 2.0
Data Transfer Rate Full Speed: Max. 12 Mbps
Low Speed: Max. 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Playable Audio Format MP3/WMA/WAV
Max. Current 500 mA/5 V
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System
Allowable Operating Temperature 0°C to +40°C
Dimensions (W ×H ×D): (approx.) Installation Size 182 mm ×52 mm ×160 mm
Panel Size 188 mm ×58 mm ×6 mm
Mass 1.4 kg (excluding accessories)

1-6 (No.MA392<Rev.002>)
KD-G847
Design and specifications are subject to change without notice.
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 ±12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz)
Mid-range ±12 dB (500 Hz, 1.0 kHz, 1.5 kHz, 2.5 kHz)
Treble ±12 dB (10.0 kHz, 12.5 kHz, 15.0 kHz, 17.5 kHz)
Frequency Response 40 Hz to 20 000 Hz
Signal to Noise Ratio 70 dB
Audio Output Level Line-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Subwoofer-Out Level/Impedance 2.5 V /20 kΩload (full scale)
Other Terminals CD changer jack, AUX (auxiliary) input jack, USB input
jack, Aerial input
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
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Dynamic Range 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format: (MPEG1/2 Audio Layer 3) Max. Bit Rate 320 kbps
WMA (Windows Media® Audio) Decoding Format Max. Bit Rate 320 kbps
USB SECTION
USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Full Speed Max. 12 Mbps
Low Speed Max. 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Playable Audio Format MP3/WMA/WAV
Max. Current 500 mA/5V
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 ×160 mm
Panel Size (approx.) 188 mm ×58 mm ×12 mm
Mass (approx.) 1.4 kg (excluding accessories)

(No.MA392<Rev.002>)1-7
SECTION 1
PRECAUTION
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.MA392<Rev.002>)
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 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.
1.3 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 pickup unit.
• Apply solder to the short land before the card wire is disconnected from the connector on the pickup unit.
(If the card 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 after connecting the card wire.
1M
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
B
b
Wires Push switch
Pickup
e
C
Base board
d
Pickup
c
Connector
Flexible wire
Frame CD mechanism
assembly

(No.MA392<Rev.002>)1-9
1.5 Important for laser products
1.CLASS 1 LASER PRODUCT
2.CAUTION :
(For U.S.A.) Visible and/or invisible class II laser radiation
when open. Do not stare into beam.
(Others) Visible and/or invisible class 1M laser radiation
when open. Do not view directly with optical instruments.
3.CAUTION : Visible and/or invisible laser radiation when
open and inter lock failed or defeated. Avoid direct
exposure to beam.
4.CAUTION : This laser product uses visible and/or 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 and PRINT
!Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
WARNING LABEL and PRINT

1-10 (No.MA392<Rev.002>)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
SECTION 3
DISASSEMBLY
3.1 Main body (Used figure are KD-APD39)
3.1.1 Removing the Bottom chassis (See Fig.1)
(1) Remove the four screws A, two screws Battaching the
heat sink.
(2) Remove the one screw Cattaching the Bottom chassis.
(3) Slide to backward, and then take out the Bottom chassis.
Fig.1
3.1.2 Removing the Front chassis (See Fig.2, 3)
(1) Remove the two screws Dattaching the Front chassis.
(See Fig.2)
(2) Remove the two screws Eattaching the both side of Front
chassis. (See Fig.3)
(3) Disengage four hooks aengaged both side of Front chassis.
(See Fig.3)
Fig.2
Fig.3
AABA
ABC
D
E
hook a
hook a

(No.MA392<Rev.002>)1-11
3.1.3 Removing the Sub board (See Fig.4)
(1) Disconnect the connector CN741 of the Sub board from the
connector CN701 of the Main board.
Fig.4
Sub board
Main board CN701
CN741

1-12 (No.MA392<Rev.002>)
3.1.4 Removing the Main board (See Fig.5 to 7)
(1) Remove the two screws Fand one screw Gattaching the
Heat sink. (See Fig.5)
(2) Remove the two screws Hand one screw Jattaching the
Main board. (See Fig.6)
(3) Remove the two screws Kattaching the Main board. (See
Fig.7)
(4) Disconnect the connector CN501 connected to CD mechanism.
(See Fid.7)
Fig.5
Fig.6
Fig.7
F
G
J
H
K
CN501

(No.MA392<Rev.002>)1-13
3.1.5 Removing the CD mechanism (See Fig.8)
(1) Remove the three screws Lattaching the CD mechanism.
Fig.8
3.1.6 Removing the Switch board (See Fig.9, 10)
(1) Remove the volume knob.
(2) Remove the one screw Mattaching the Rear cover. (See
Fig.9)
(3) Remove the four screws Nattaching the Rear cover. (See
Fig.10)
(4) Disengage nine hooks bengaged Rear cover. (See Fig.10)
Fig.9
Fig.10
L
L
M
N
NN
N
hook b
hook b
hook b
hook b

1-14 (No.MA392<Rev.002>)
3.2 CD mechanism assembly
3.2.1 Removing the top cover
(See Figs.1 and 2)
(1) From the both side of the CD mechanism assembly, remove
the four screws Aattaching the top cover. (See Fig.1.)
(2) Lift the front side of the top cover and move the top cover
backward to release the two joints a. (See Figs.1 and 2.)
Fig.1
Fig.2
A
A
A
a
Top cover
A
a
Top cover

(No.MA392<Rev.002>)1-15
3.2.2 Removing the push switch
(See Figs.3)
(1) From the bottom side of the CD mechanism assembly, remove
the screw Battaching the push switch.
(2) Take out the push switch from the CD mechanism assembly.
Reference:
Remove the wires from soldered sections bof the push switch
as required.
3.2.3 Removing the base board
(See Figs.3 and 4)
Caution:
Solder the short land cbefore the flexible wire is disconnected from
the connector on the pickup. If the flexible wire is disconnected
without applying solder, the pickup may be destroyed by static
electricity. (See Fig.3.)
(1) From the bottom side of the CD mechanism assembly, remove
the screw Cattaching the base board. (See Figs.3 and 4.)
(2) Solder the short land c on the pickup. (See Fig.3.)
(3) Disconnect the flexible wire from the connector on the pickup.
(See Fig.3.)
(4) Remove the base board from the joints dof the frame in the
direction of the arrow. (See Figs.3 and 4.)
Reference:
Remove the wires from the soldered sections eon the base
board as required. (See Fig.3.)
Caution:
When reattaching the base board, be sure to remove solder
from the short land c after connecting the flexible wire. (See
Fig.3.)
Fig.3
Fig.4
B
b
Wires Push switch
Pickup
e
C
Base board
d
Pickup
c
Connector
Flexible wire
Frame CD mechanism
assembly
C
Base board
Flexible wire
Frame
d

1-16 (No.MA392<Rev.002>)
3.2.4 Removing the chassis unit
(See Figs.5 and 6)
• Remove the top cover and base board.
(1) From the top side of the CD mechanism assembly, remove
the front suspension springs and rear suspension springs
attaching the chassis unit to the frame. (See Fig.5.)
(2) Remove the chassis unit from the dampers on the frame in
an upward direction. (See Fig.6.)
Note:
• Pay attention to misuse and loss of each spring. (See Fig.5.)
• When reassembling, make sure that the three shafts on the
underside of the chassis unit are inserted to the dampers
certainly. (See Fig.6.)
Fig.5
Fig.6
Front suspension spring
Rear suspension spring Rear suspension spring
Front suspension spring
Chassis unit
Frame
Chassis unit
Shaft
Shaft
Shaft
Damper R
Damper F
Damper F
Frame

(No.MA392<Rev.002>)1-17
3.2.5 Removing the clamper assembly
(See Figs.7 and 8)
• Remove the top cover.
Move the clamper assembly in the direction of the arrow to release
the joints ffrom the chassis unit.
Fig.7
Fig.8
ff
Clamper assembly
Chassis unit
f
f
Clamper assembly
Chassis unit

1-18 (No.MA392<Rev.002>)
3.2.6 Removing the loading/feed motor assembly
(See Fig.9)
• Remove the top cover, base board and chassis unit.
From the bottom side of the chassis unit, remove the screw D
and take out the loading/feed motor assembly in the direction of
the arrow.
Reference:
Remove the wires from the soldered sections gof the loading/
feed motor assembly as required.
Fig.9
D
Loading/feed
motor
assembly
g
Loading/feed motor assembly
Chassis unit

(No.MA392<Rev.002>)1-19
3.2.7 Removing the pickup
(See Figs.10 to 12)
• Remove the top cover, base board and chassis unit.
(1) From the bottom side of the chassis unit, remove the screw
Eattaching the pu. shaft holder B and pull the pu. shaft out
of the pu. shaft holder A. (See Fig.10.)
(2) Remove the screw Fattaching the pu. shaft holder A. (See
Fig.10.)
(3) Take out the pickup with pu. shaft holder A and feed screw
assembly from the chassis unit. (See Fig.11.)
(4) Remove the section hof the pu. shaft holder A in the direction
of the arrow. (See Fig.11.)
(5) Remove the feed screw assembly from the section jof the
pickup in the direction of the arrow. (See Fig.11.)
(6) Remove the screw Gattaching the feed screw holder to the
pickup. (See Fig.12.)
Reference:
Remove the feed nut spring from the feed screw holder
as required. (See Fig.12.)
(7) Release the claw kin the direction of the arrow to remove
the feed sub holder. (See Fig.12.)
3.2.8 Reattaching the pickup
(See Figs.10 to 13)
(1) Reattach the feed sub holder to the pickup. (See Fig.12.)
(2) Reattach the feed screw holder to the pickup using the
screw G. (See Fig.12.)
(3) Reattach the feed screw assembly and pu. shaft holder A
to the pickup as before. (See Fig.11.)
(4) Set the section mof the pickup to the rail of the chassis unit
at first and attach the pickup to the chassis unit with the
screw Fas before. (See Figs.10 and 13.)
(5) Attach the pu. shaft to the pickup as before. (See Fig.10.)
(6) Attach the pu. shaft holder B to the chassis unit with the
screw Eas before. (See Fig.10.)
Fig.10
Fig.11
Fig.12
Fig.13
Pu. shaft holder A
Chassis unit
Pu. shaft
Pickup
Pu. shaft holder B
E
F
Pickup
Feed screw assembly
Pu. shaft holder A
h
j
k
Pickup
Feed screw holder
Feed sub holder
GFeed screw
holder
Feed nut
spring
F
Chassis unit
Pickup
m
Rail

1-20 (No.MA392<Rev.002>)
3.2.9 Removing the trigger arm
(See Fig.14)
• Remove the top cover, base board, chassis unit and clamper
assembly.
(1) From the top side of the chassis unit, remove the trigger
arm spring from the sections (n, p).
(2) From the bottom side of the chassis unit, release the claws q
of the trigger arm base in the direction of the arrow to remove
them from the sections rof the chassis unit to the other side.
Note:
When releasing the claws q, take care not to break them.
(3) From the top side of the chassis unit, move the select arm R
and select lock arm in the direction of the arrow to remove
the trigger arm base from the section sin the direction of the
arrow.
(4) Remove the trigger arm from the section t.
Fig.14
3.2.10 Removing the top plate assembly
(See Fig.15)
• Remove the top cover, base board, chassis unit, clamper assembly
and trigger arm.
(1) Remove the screw Hattaching the top plate assembly.
(2) Move the top plate assembly in the direction of the arrow to
release the joints (u, v).
Reference:
Remove the wires from the soldered sections wof the top plate
assembly as required.
Note:
When reassembling, solder the wires as before.
Fig.15
Chassis unit q
r
Trigger arm base Trigger arm
p
t
n
Trigger arm
spring
s
Select lock arm
Select arm R
Chassis unit
H
w
Wire(Red)
Top plate assembly
Wire(White)
Wire(Brown)
u
v