JVC KD-BT11J, KD-BT11E, KD-BT11EU, KD-BT11U, KD-BT11EE Service Manual

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SERVICE MANUAL

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

for J/U/UT/UR

for

E/EX/EY/EU/EE

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 EE

for J/UR

No.MA387<Rev.003>

2008/9

SPECIFICATION

J / UR

AUDIO AMPLIFIER SECTION

Power Output 20 W RMS × 4 Channels at 4 Ω and < or = 1% THD+N Signal-to-Noise Ratio 80 dBA (reference: 1 W into 4 Ω) Load Impedance 4 Ω (4 Ω to 8 Ω allowance) 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 kΩ load (full scale) Subwoofer-Out Level/Impedance 2.5 V /20 kΩ load (full scale) Output Impedance 1 kΩ Other Terminal CD changer jack AUX (auxiliary) input jack Antenna input

TUNER SECTION

Frequency Range FM

AM with channel interval set to 10 kHz: 530 kHz to 1 710 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) 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

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

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.) Mass 1.3 kg (2.9 lbs) (excluding accessories)

Design and specifications are subject to change without notice.

Installation Size Panel Size 188 mm × 58 mm × 6 mm (7-7/16” × 2-5/16” × 1/4”)

with channel inter val set to 100 k Hz or 200 kH z: 87.5 MH z to 107.9 MH z

with channel interval set to 50 kHz: 87.5 MHz to 108.0 MHz

with channel interval set to 9 kHz: 531 kHz to 1 602 kHz

65 dB

BLUETOOTH

GENERAL

182 mm × 52 mm × 160 mm (7-3/16” × 2-1/16” × 6-5/16”)

1-2 (No.MA387<Rev.003>)

E/EX/EY/EU

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 Ω to 8 Ω allowance) 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-O ut Level/Impedance 2.5 V /20 kΩ load (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 Sel ectivity (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

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 Negat ive 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 accessor ies)

Design and specifications are subject to change without notice.

(No.MA387<Rev.003>)1-3

AUDIO AMPLIFIER SECTION

Maximum Power Ou tput Front/Rear 50 W per channel Continuous Power Output

(RMS)

Front/Rear 19 W per channel into 4 Ω, 40 Hz to 20 000 H z at no more than 0.8%

total harmonic distortion. Load Impedance 4 Ω (4 Ω to 8 Ω allowance) 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 kΩ load (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 Channe l Selec tivity (40 0 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

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 (exclu ding accessories)

Design and specifications are subject to change without notice.

1-4 (No.MA387<Rev.003>)

U/UT

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 Ω to 8 Ω allowance) 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 kΩ load (full scale) Subwoofer-Out Level/Impedance 2.5 V /20 kΩ load (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

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 groun d 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)

Design and specifications are subject to change without notice.

(No.MA387<Rev.003>)1-5

1.1 Safety Precautions

SECTION 1

PRECAUTION

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.

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

1.2 Preventing static electricity

Electrostatic discharge (ESD), w hi ch occurs w hen sta tic ele ct ricit y sto red i n the bod y, fa bric , etc. is discharged, ca n de stroy 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.

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

(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 che ck the con dition of th e laser dio de in the opt ical pick up. The tes ter's internal power so urce can ea sily 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 nip pers, etc. afte r replacing th e optical pi ckup. For speci fic details, refe r to the

replacement procedure in th e t ext . R em ove the anti-static pin w he n re pla cing the traverse unit. Be c arefu l not to tak e to o l on g 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.

Pickup

Wires

Push switch

Base board

Frame

Flexible wire

Connector

CD mechanism assembly

Pickup

(No.MA387<Rev.003>)1-7

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.

Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

REPRODUCTION AND POSITION OF LABELS and PRINT

WARNING LABEL and PRINT

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

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 a engaged the both side of the

FRONT CHASSIS assembly.

hook

Fig.1

3.1.2 Removing the HEAT SINK (See Fig.2, 3)

(1) Remove the three screws A and the two screws B attaching

the HEAT SINK. (See Fig.2)

(2) Remove the two screws C and the one screw D attaching

the HEAT SINK. (See Fig.3)

Fig.2

Fig.3

(No.MA387<Rev.003>)1-9

3.1.3 Removing the BOTTOM COVER (See Fig.4)

(1) Remove the one screw E attaching the BOTTOM COVER. (2) Slide the BOTTOM COVER to backward.

3.1.4 Removing the MAIN BOARD assembly (See Fig.5, 6)

(1) Remove the two screws F and the one screw G attaching

the MAIN BOARD assembly. (See Fig.5)

(2) Remove the two screws H attaching the MAIN BOARD assembly.

(See Fig.6)

(3) Disconnect the connector CN501

BOARD assembly and CD MECHANISM assembly. (Se e Fig.6)

connected to MAIN

Fig.4

Fig.5

CN501

1-10 (No.MA387<Rev.003>)

Fig.6

3.1.5 Removing the CD MECHANISM assembly (See Fig.7)

(1) Remove the three screws J attaching the CD MECHANISM

assembly.

3.1.6 Removing the SWITCH BOARD assembly (See Fig.8)

(1) Remove the VOLUME KNOB. (2) Remove the four screws K attaching the REAR COVER. (3) Disengage the nine hooks b engage d the REAR COVER.

Fig.7

hook

Fig.8

hook

(No.MA387<Rev.003>)1-11

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 A attaching 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.)

Top cover

Fig.1

Top cover

Fig.2

1-12 (No.MA387<Rev.003>)

3.2.2 Removing the push switch

(See Figs.3)

(1) From the bottom side of the CD mechanism assembly, re-

move the screw B attaching the push switch.

(2) Take out the push switch from the CD mechanism assem-

bly.

Reference:

Remove the wires fro m solder ed sections b of the push sw itch as required.

3.2.3 Removing the base board

(See Figs.3 and 4)

Caution:

Solder the short land c before the f lexib le wire is disc onnec ted from the connector on the pic ku p. If the f lex ible 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, re-

move the scre w C attaching 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 fr om the conne ctor on the pic k-

up. (See Fig.3.) (4) Remove the base board from the joints d of the fram e in the

direction of the arrow. (See Figs.3 and 4.)

Reference:

Remove the wires from the soldered sections e on 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.)

Base board

Frame

Wires

Push switch

Flexible wire

Connector

Fig.3

Pickup

CD mechanism assembly

Pickup

Base board

Flexible wire

Frame

Fig.4

(No.MA387<Rev.003>)1-13

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 mec hanism a ssembly, r emove

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 da mpers on the f rame in

an upward direction. (See Fig.6.)

Note:

• Pay attention to misuse and loss of each spring. (See Fi g.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.)

Chassis unit

Front suspension spring

Frame

Rear suspension spring Rear suspension spring

Fig.5

Chassis unit

Shaft

Damper F

Damper R

Frame

Shaft

Fig.6

1-14 (No.MA387<Rev.003>)

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 f from the chassis unit.

Chassis unit

Clamper assembly

Chassis unit

Fig.7

Fig.8

(No.MA387<Rev.003>)1-15

3.2.6 Removing the loading/feed motor assembly (See Fig.9)

• Remove the top cover, base board and cha ss is 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 th e sold ered sec tions g of the lo ading / feed motor assembly as required.

Loading/feed motor assembly

Chassis unit

Loading/feed motor assembly

Fig.9

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

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

E attaching the pu. shaf t ho lder B an d pull the pu . shaft out of the pu. shaft holder A. (See Fig.10.)

(2) Remove the screw F attaching the pu. sh aft hol der A. (See

Fig.10.)

(3) Take out the pickup with pu. shaft holder A an d feed s crew

assembly from the chassis unit. (See Fig.11.)

(4) Remove the section h of the pu. shaft holder A in th e direc-

tion of the arrow. (See Fig.11.)

(5) Remove the feed screw assembly from the section j of the

pickup in the direction of the arrow. (See Fig.11.)

(6) Remove the screw G attaching 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 th e c law k in the direction of the arrow to remove

the feed sub holder. (See Fig.12.)

Pickup

Feed screw assembly

Feed screw holder

Pu. shaft holder A

Fig.11

Feed screw holder

3.2.8 Reattachi ng the picku p

(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 m of the pickup to the rail of the chas sis unit

at first and attach the pickup to the chassis unit with the

screw F as 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 E as before. (See Fig.10.)

Chassis unit

Pu. shaft holder A

Pu. shaft

Pickup

Feed sub holder

Pickup

Rail

Feed nut spring

Fig.12

Pickup

Pu. shaft holder B

Fig.10

Chassis unit

Fig.13

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

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 directio n o f the arrow to remove them from the sections r of the chassis unit to the other side.

Note:

When releasing the claws q, t ake care n ot to break th em.

(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 s in the direction of the arrow.

(4) Remove the trigger arm from the section t.

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 H attaching the top plate assembly. (2) Move the top plate assembly in the d irection of the arr ow to

release the joints (u, v).

Reference:

Remove the wires from the soldered sections w of the top plate assembly as required.

Note:

When reassembling, solder the wires as before.

Select lock arm

Trigger arm spring

Select arm R

Chassis unit

Top plate assembly

Chassis unit

Trigger arm base

Trigger arm

Fig.14

Wire(Red)

1-18 (No.MA387<Rev.003>)

Wire(White)

Wire(Brown)

Fig.15

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 x of the link gear L and link gear R.

(2) Remove the link gear L in an upward direction whi le releas-

ing the claws y of the link gear L in the direction of the arrow.

(3) Move the mode switch in the direction of t he arrow 1 to re -

move the sections z of 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.

Top plate assembly

Link gear spring

Link gear R

ac ac

Link gear L

Fig.16

Mode switch

(No.MA387<Rev.003>)1-19

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 asse mbly. (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 in an upward direction while releas-

ing the claws ae of the lin k gear R in the dire ction of the a rrow. (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 assembly at first and remove the sections (ak, am) of th e sele ct 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 ali gn ing 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.

Select arm R

Link gear R

Select lock arm

Link gear spring

Top plate assembly

Link gear L

Link gear R

an an

Fig.17

Top plate assembly

Link gear L

1-20 (No.MA387<Rev.003>)

Select lock arm spring

Fig.18

3.2.13 Removing the loading roller assembly (See Figs.19 to 21)

• Remove the top cover, base board, chassis unit, clamper as-

sembly and top plate assembly. (1) From the left side of the chassis unit, remove the screw J

attaching the lock arm assembly. (See Fig.19.)

(2) Remove the projection ap of the lock arm assembly from

the joint aq while opening the cam plate R in the direction of the arrow. (See Fig.19.)

(3) Remove the lock arm assembly from the projection ar of

the chassis unit. (See Fig.19.)

(4) Remove the projection as of the lock arm assembly from

the joint at of the cam plate L assembly. (See Fig.19.)

(5) From the right side of the lock arm assembly, remove the

loading roller spring L from the section au. (See Fig.20.)

(6) From the top side of the lock arm assembly, remove the

loading roller spring R in the direction of the arrow and remove the loading roller assembly. (See Fig.20.)

(7) Remove the roller guide R, HL washer and roller guide L

from the both ends of the loading roller assembly. (See Fig.21.)

Lock arm assembly

Loading roller assembly

Cam plate R

Fig.19

Chassis unit

Cam plate L assembly

Loading roller spring R

Lock arm assembly

Loading roller spring L

Fig.20

Roller guide L Roller guide R

HL washer

Loading roller assembly

Fig.21

(No.MA387<Rev.003>)1-21

+ 46 hidden pages