JVC KD-BT11J User manual

SERVICE MANUAL
COPYRIGHT © 2008 Victor Company of Japan, Limited No.MA387<Rev.003>
2008/9
CD RECEIVER
MA387<Rev.003>20089SERVICE MANUAL
KD-BT11J, KD-BT11E, KD-BT11EX,
KD-BT11EY, KD-BT11EU, KD-BT11EE,
KD-BT11U, KD-BT11UT, KD-BT19UR,
KD-BT12E, KD-BT12EX
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
for
E/EX/EY/EU/EE
for EE
for J/U/UT/UR
for J/UR

1-2 (No.MA387<Rev.003>)
SPECIFICATION
J / UR
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)
Q Bass: Q1.0, Q1.25, Q 1.5, Q2.0
Mid-range: Q0.5, Q0.75, Q1.0, Q1.25
Frequency Response 40 Hz to 20 000 Hz
Line-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Subwoofer-Out Level/Impedance 2.5 V /20 kΩload (full scale)
Output Impedance 1 kΩ
Other Terminal CD changer jack AUX (auxiliary) input jack Antenna input
TUNER SECTION
Frequency Range FM
with channel interval set to 100 kHzor 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
BLUETOOTH
Version Bluetooth 1.2 certified
Power Class Class 2 Radio (possible distance 10 m)
Service Area 10 m
Profile HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3
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 1.3 kg (2.9 lbs) (excluding accessories)

(No.MA387<Rev.003>)1-3
E/EX/EY/EU
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)
Q Bass: Q1.0, Q1.25, Q 1.5, Q2.0
Mid-range: Q0.5, Q0.75, Q1.0, Q1.25
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 80 dB
Line-Out/Subwoofer-Out Level/Impedance 2.5 V /20 kΩload (full scale)
Output Impedance 1 kΩ
Other Terminal
CD changer jack Steering wheel remote input AUX (auxiliary) input jack Aerial 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: 192 kbps
BLUETOOTH
Version Bluetooth 1.2 certified
Power Class Class 2 Radio (possible distance 10 m)
Service Area 10 m
Profile HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3
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 ×13 mm
Mass 1.3 kg (excluding accessories)

1-4 (No.MA387<Rev.003>)
EE
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 19W perchannelinto 4Ω, 40 Hzto 20 000 Hz atno 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)
Q Bass: Q1.0, Q1.25, Q 1.5, Q2.0
Mid-range: Q0.5, Q0.75, Q1.0, Q1.25
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 80 dB
Line-Out/Subwoofer-Out Level/Impedance 2.5 V /20 kΩload (full scale)
Output Impedance 1 kΩ
Other Terminal AUX (auxiliary) 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: 192 kbps
BLUETOOTH
Version Bluetooth 1.2 certified
Power Class Class 2 Radio (possible distance 10 m)
Service Area 10 m
Profile HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3
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 ×13 mm
Mass 1.3 kg (excluding accessories)

(No.MA387<Rev.003>)1-5
U/UT
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 channelinto 4 Ω,40 Hz to 20000 Hzat nomore than0.8% 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)
Q Bass: Q1.0, Q1.25, Q 1.5, Q2.0
Mid-range: Q0.5, Q0.75, Q1.0, Q1.25
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 80 dB
Line-Out Level/Impedance 2.5 V/20 kΩload (full scale)
Subwoofer-Out Level/Impedance 2.5 V /20 kΩload (full scale)
Output Impedance 1 kΩ
Other Terminal CD changer jack AUX (auxiliary) 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 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
BLUETOOTH
Version Bluetooth 1.2 certified
Power Class Class 2 Radio (possible distance 10 m)
Service Area 10 m
Profile HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3
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 1.3 kg (excluding accessories)

1-6 (No.MA387<Rev.003>)
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.

(No.MA387<Rev.003>)1-7
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 checkthe condition of the laser diode in the optical pickup. Thetester's internalpower 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
Wires Push switch
Pickup
Base board
Pickup
Connector
Flexible wire
Frame CD mechanism
assembly

1-8 (No.MA387<Rev.003>)
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

(No.MA387<Rev.003>)1-9
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the FRONT CHASSIS assembly (See Fig.1)
(1) Disengage the four hooks aengaged the both side of the
FRONT CHASSIS assembly.
Fig.1
3.1.2 Removing the HEAT SINK (See Fig.2, 3)
(1) Remove the three screws Aand the two screws Battaching
the HEAT SINK. (See Fig.2)
(2) Remove the two screws Cand the one screw Dattaching
the HEAT SINK. (See Fig.3)
Fig.2
Fig.3
hook a
A
B
C
D

1-10 (No.MA387<Rev.003>)
3.1.3 Removing the BOTTOM COVER (See Fig.4)
(1) Remove the one screw Eattaching the BOTTOM COVER.
(2) Slide the BOTTOM COVER to backward.
Fig.4
3.1.4 Removing the MAIN BOARD assembly (See Fig.5, 6)
(1) Remove the two screws Fand the one screw Gattaching
the MAIN BOARD assembly. (See Fig.5)
(2) RemovethetwoscrewsHattachingtheMAINBOARDassembly.
(See Fig.6)
(3) Disconnect the connector CN501 connected to MAIN
BOARD assembly and CD MECHANISM assembly. (See
Fig.6)
Fig.5
Fig.6
E
FG
H
CN501

(No.MA387<Rev.003>)1-11
3.1.5 Removing the CD MECHANISM assembly (See Fig.7)
(1) Remove the three screws Jattaching the CD MECHANISM
assembly.
Fig.7
3.1.6 Removing the SWITCH BOARD assembly (See Fig.8)
(1) Remove the VOLUME KNOB.
(2) Remove the four screws Kattaching the REAR COVER.
(3) Disengage the nine hooks bengaged the REAR COVER.
Fig.8
J
J
hook b
hook b
K
K

1-12 (No.MA387<Rev.003>)
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, re-
move 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.MA387<Rev.003>)1-13
3.2.2 Removing the push switch
(See Figs.3)
(1) From the bottom side of the CD mechanism assembly, re-
move the screw Battaching the push switch.
(2) Take out the push switch from the CD mechanism assem-
bly.
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 discon-
nected without applying solder, the pickup may be destroyed
by static electricity. (See Fig.3.)
(1) From the bottom side of the CD mechanism assembly, re-
move 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 fromthe connector on thepick-
up. (See Fig.3.)
(4) Remove the base board fromthe 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

1-14 (No.MA387<Rev.003>)
3.2.4 Removing the chassis unit
(See Figs.5 and 6)
• Remove the top cover and base board.
(1) From the topside ofthe 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 lossof 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.MA387<Rev.003>)1-15
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 re-
lease the joints ffrom the chassis unit.
Fig.7
Fig.8
ff
Clamper assembly
Chassis unit
f
f
Clamper assembly
Chassis unit

1-16 (No.MA387<Rev.003>)
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.MA387<Rev.003>)1-17
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 direc-
tion 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

1-18 (No.MA387<Rev.003>)
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
qof the trigger arm base in the direction of the arrow to re-
move 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 re-
move the trigger arm base from the section sin the direc-
tion 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 as-
sembly 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

(No.MA387<Rev.003>)1-19
3.2.11 Removing the mode switch
(See Fig.16)
• Remove the top cover, base board, chassis unit, clamper as-
sembly, trigger arm and top plate assembly.
(1) From the top side of the top plate assembly, remove the
link gear spring from the sections xof the link gear L and
link gear R.
(2) Remove the linkgear L in an upward directionwhile releas-
ing the claws yof the link gear L in the direction of the ar-
row.
(3) Move the mode switch in the direction of the arrow 1 to re-
move the sections zof the top plate assembly.
(4) Move the mode switch in the direction of the arrow 2 and
remove the mode switch from the sections (aa, ab).
Note:
When reattaching the link gear L, attach it after aligning the
hole ac of the link gear L to the hole ac of the link gear R.
Reference:
When reassembling, reverse the above removing procedure.
Fig.16
1
2
Link gear L
Link gear R
Top plate assembly
Link gear spring
Mode switch
xy
y
ab
aa
ac ac
Link
gear R Link gear L
z

1-20 (No.MA387<Rev.003>)
3.2.12 Removing the select arm R and select lock arm
(See Figs.17 and 18)
• Remove the top cover, base board, chassis unit, clamper as-
sembly, trigger arm and top plate assembly.
(1) From the top side of the top plate assembly, remove the
link gear spring from the sections ad of the link gear L and
link gear R. (See Fig.17.)
(2) Remove the link gear R inan upward directionwhilereleas-
ing the claws ae of the link gear R in the direction of the ar-
row. (See Fig.17.)
(3) Move the select arm R in the direction of the arrow 1 to re-
move the sections af of the top plate assembly. (See
Fig.17.)
(4) Move the select arm R in the direction of the arrow 2 and
remove the select arm R from the sections ag. (See
Fig.17.)
(5) From the bottom side of the top plate assembly, remove
the select lock arm spring from the section ah. (See
Fig.18.)
(6) From the top side of the top plate assembly, remove the
section aj of the select lock arm from the top plate assem-
bly at first and remove the sections (ak, am) of the select
lock arm from the top plate assembly. (See Fig.18.)
Note:
• When removing the select lock arm spring, be careful not to
lose it. (See Fig 18.)
• When reattaching the link gear R, attach it after aligning the
hole an of the link gear R to the hole an of the link gear L.
(See Fig.17.)
Reference:
When reassembling, reverse the above removing procedure.
Fig.17
Fig.18
1
2
Link gear L
Link gear R
Top plate assembly
Link gear spring
ad
ae
ae
an an
Link
gear R Link gear L
ag
af
Select arm R
aj
ak
Select lock arm
Top plate assembly
am
ah
Select lock
arm spring