Jvc Kd-g269 User manual

SERVICE MANUAL

2005/7

CD RECEIVER

MA18820057

KD-G269

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

SO

UND

VOL VOL

SO

URC

E

R

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U

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A

TT

KD

-

G

269UR

Area suffix

UR -------------------------- Brazil

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1-2 (No.MA188)

SPECIFICATION

Design and specifications are subject to change without notice.

AUDIO AMPLIFIER SECTION

Power Output 18 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

Frequency Response 40 Hz to 20 000 Hz

Line-Out Level/Impedance 2.5 V/20 kΩload (full scale)

Output Impedance 1 kΩ

Subwoofer-Out Level/Impedance 2.0 V/20 kΩload (full scale)

TUNER SECTION

Frequency Range FM 87.5 MHz to 107.9 MHz

AM 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) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 35 dB

Capture Ratio 1.5 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

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 ×150 mm (7-3/16" x 2-1/16" x 5-15/16")

Panel Size (approx.) 188 mm ×58 mm ×11 mm (7-7/16" x 2-5/16" x 7/16")

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

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(No.MA188)1-3

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.

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1-4 (No.MA188)

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 CD 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 CD pickup unit.

• Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit.

(If the flexible wire is disconnected without applying solder, the CD 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

Pickup

Short-circuit point

(Soldering)

Flexible wire

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(No.MA188)1-5

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

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1-6 (No.MA188)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

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(No.MA188)1-7

SECTION 3

DISASSEMBLY

3.1 Main body

3.1.1 Removing the front panel assembly

(See Fig.1)

Push the detach button in the lower right part of the front panel

assembly and remove the front panel assembly.

Fig.1

3.1.2 Removing the bottom cover

(See Fig.2)

From the bottom side of the main body, insert a screwdriver un-

der the joints to release the joints (a, b, c) and remove the bottom

cover from the main body.

Caution:

When releasing the joints using a screwdriver, do not damage

the main board.

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 A.

(2) Release the joints (d, e) and remove the front chassis as-

sembly toward the front.

Fig.3

Front panel assembly

Detach button

Bottom cover

Joint b

Joint c

Joint a

Joint d

Front chassis assembly

A

Joint e

Joint d Joint e

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1-8 (No.MA188)

3.1.4 Removing the heat sink

(See Fig.4)

• Remove the front panel assembly as required.

From the left side of the main body, remove the screw Band two

screws Cattaching the heat sink.

Fig.4

3.1.5 Removing the rear bracket

(See Fig.5)

• Remove the bottom cover.

Remove the three screws D, three screws Eand two screws F

attaching the rear bracket from the back side of the main body.

Fig.5

3.1.6 Removing the main board

(See Fig.6)

• Remove the front panel assembly, bottom cover, front chassis

assembly, heat sink and rear bracket.

(1) Remove the two screws Gattaching the main board.

(2) Disconnect the connector CN501 and remove the main

board.

Fig.6

Heat sink

BCC

EF

DD

E

Rear bracket F

Main board

G

CN501

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(No.MA188)1-9

3.1.7 Removing the CD mechanism assembly

(See Fig. 7)

• Remove the front panel assembly, bottom cover, front chassis

assembly, heat sink, rear bracket and main board.

Remove the three screws Hand take out the CD mechanism as-

sembly from the top chassis.

Fig.7

3.1.8 Removing the switch board

(See Figs.8 to 10)

• Remove the front panel assembly.

(1) From the back side of the front panel assembly, remove the

four screws Jattaching the rear cover. (See Fig.8.)

(2) Release the ten joints fand remove the rear cover. (See

Fig.9.)

(3) Release the joint gand take out the switch board from the

front panel assembly. (See Fig.10.)

Fig.8

Fig.9

Fig.10

H

CD mechanism assembly Top chassis

J

JRear cover

Joints f

Joint fJoints f

Joints f

Joints

f

Joint f

Rear cover

Switch board Joint g Front panel assembly

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1-10 (No.MA188)

3.2 CD Mechanism Assembly

3.2.1 Removing the top cover

(See Figs.1 and 2)

(1) Remove the two screws Aon the both side of the body.

(2) Lift the front side of the top cover and move the top cover

backward to release the two joints a.

Fig.1

Fig.2

A

Joints a

Top cover

Joints a

Top cover

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(No.MA188)1-11

3.2.2 Removing the connector board

(See Figs.3 to 5)

CAUTION:

Before disconnecting the flexible wire from the pickup, solder

the short-circuit point on the pickup. No observance of this in-

struction may cause damage of the pickup.

(1) Remove the screw Bfixing the connector board.

(2) Solder the short-circuit point on the connector board.

(3) Disconnect the flexible wire from the pickup.

(4) Move the connector board in the direction of the arrow to

release the two joints b.

(5) Unsolder the wire on the connector board if necessary.

CAUTION:

Unsolder the short-circuit point after reassembling.

Fig.3

Fig.4

Fig.5

B

Connector board

Pickup

Short-circuit point

Joints b

Wires

Pickup

Short-circuit point

(Soldering)

Flexible wire

B

Flexible wire

Connector board

Frame

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1-12 (No.MA188)

3.2.3 Removing the DET switch

(See Figs.6 and 7)

(1) Extend the two tabs cof the feed sw. holder and pull out

the switch.

(2) Unsolder the DET switch wire if necessary.

Fig.6

Fig.7

Connector

board

DET switch

Pickup

DET switch Tab c

Tab c

DET switch wire

Feed sw. holder

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(No.MA188)1-13

3.2.4 Removing the chassis unit

(See Figs.8 and 9)

• Prior to performing the following procedure, remove the top

cover and connector board.

(1) Remove the two suspension springs (L) and (R) attaching

the chassis unit to the frame.

CAUTION:

• The shape of the suspension spring (L) and (R) are dif-

ferent. Handle them with care.

• When reassembling, make sure that the three shafts

on the underside of the chassis unit are inserted to the

dampers certainly.

Fig.8

Fig.9

Suspension spring (L)

Suspension spring (R)

Chassis unit

Frame

Chassis unit

Frame

Shafts

Shaft

Dampe

r

Damper

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1-14 (No.MA188)

3.2.5 Removing the clamper assembly

(See Figs.10 and 11)

• Prior to performing the following procedure, remove the top

cover.

(1) Remove the clamper arm spring.

(2) Move the clamper assembly in the direction of the arrow to

release the two joints d.

Fig.10

Fig.11

Clamper arm

spring

Chassis rivet

assembly

Joint d

Joint d Clamper assembly

Clamper arm spring

Clamper

assembly

Joint d

Chassis rivet assembly

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(No.MA188)1-15

3.2.6 Removing the loading / feed motor assembly

(See Figs.12 and 13)

• Prior to performing the following procedure, remove the top

cover, connector board and chassis unit.

(1) Remove the screw Cand move the loading / feed motor

assembly in the direction of the arrow to remove it from the

chassis rivet assembly.

(2) Disconnect the wire from the loading / feed motor assembly

if necessary.

CAUTION:

When reassembling, connect the wire from the loading /

feed motor assembly to the flame as shown in Fig.12.

Fig.12

Fig.13

Loading / feed motor assembly

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1-16 (No.MA188)

3.2.7 Removing the pickup unit

(See Figs.14 to 18)

• Prior to performing the following procedure, remove the top

cover, connector board and chassis unit.

(1) Remove the screw Dand pull out the pu. shaft holder from

the pu. shaft.

(2) Remove the screw Eattaching the feed sw. holder.

(3) Move the part eof the pickup unit upward with the pu. shaft

and the feed sw. holder, then release the joint f of the feed

sw. holder in the direction of the arrow. The joint gof the

pickup unit and the feed rack is released, and the feed sw.

holder comes off.

(4) Remove the pu. shaft from the pickup unit.

(5) Remove the screw Fattaching the feed rack to the pickup

unit.

3.2.8 Reattaching the pickup unit

(See Figs.14 to 17)

(1) Reattach the feed rack to the pickup unit using the screw F.

(2) Reattach the feed sw. holder to the feed rack while setting

the joint g to the slot of the feed rack and setting the part f

of the feed rack to the switch of the feed sw. holder correct-

ly.

(3) As the feed sw. holder is temporarily attached to the pickup

unit, set to the gear of the joint g and to the bending part of

the chassis (joint h) at a time.

CAUTION:

Make sure that the part i on the underside of the feed

rack is certainly inserted to the slot j of the change lock

lever.

(4) Reattach the feed sw. holder using the screw E.

(5) Reattach the pu. shaft to the pickup unit. Reattach the pu.

shaft holder to the pu. shaft using the screw D.

Fig.14

Fig.15

Fig.16

Fig.17

Fig.18

Feed sw. holder

E

D

Joint g

Joint f

Part e

Pickup unit

Pu. shaft holder

Pu. shaft

Feed sw. holder

Part e

Pickup unit

Feed rack

Feed sw.

holder

D

E

Joint f

Pu. shaft

holder

Pu. shaft

Pickup unit

Joint h

Part i

Slot j

Joint g

FFeed rack

Pickup unit

Joint f

Joint g

Feed rack

Pickup unit

Feed sw. holder

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA188)1-17

3.2.9 Removing the trigger arm

(See Figs.19 and 20)

• Prior to performing the following procedure, remove the top

cover, connector board and clamper unit.

(1) Turn the trigger arm in the direction of the arrow to release

the joint kand pull out upward.

CAUTION:

When reassembling, insert the part m and n of the trigger

arm into the part pand qat the slot of the chassis rivet

assembly respectively and join the joint k at a time.

Fig.19

Fig.20

3.2.10 Removing the top plate assembly

(See Fig.21)

• Prior to performing the following procedure, remove the top

cover, connector board, chassis unit, and clamper assembly.

(1) Remove the screw H.

(2) Move the top plate assembly in the direction of the arrow to

release the two joints r.

(3) Unsolder the wire marked s if necessary.

Fig.21

Joint k

Trigger arm

Chassis rivet assembly

Trigger arm

Chassis rivet

assembly

Part p

Part m

Part n

Part q

Top plate assembly

Joints

r

s

H

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-18 (No.MA188)

3.2.11 Removing the mode sw. / select lock arm

(See Figs.22 and 23)

• Prior to performing the following procedure, remove the top

plate assembly.

(1) Bring up the mode sw. to release from the link plate (joint t)

and turn in the direction of the arrow to release the joint u.

(2) Unsolder the wire of the mode sw. marked s if necessary.

(3) Turn the select lock arm in the direction of the arrow to re-

lease the two joints v.

(4) The select lock arm spring comes off the select lock arm at

the same time.

Fig.22

Fig.23

Mode sw.

Select lock arm

Joint t

Link plate

Joint u s

Top plate

Select lock arm

Select lock

arm spring

Select lock arm

Link plate

Joints v

Hook w

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

(No.MA188)1-19

3.2.12 Reassembling the mode sw. / select lock arm

(See Figs.24 to 26)

REFERENCE:

Reverse the above removing procedure.

(1) Reattach the select lock arm spring to the top plate and set

the shorter end of the select lock arm spring to the hook w

on the top plate.

(2) Set the other longer end of the select lock arm spring to the

boss x on the underside of the select lock arm, and join the

select lock arm to the slots (joint v). Turn the select lock

arm as shown in the figure.

(3) Reattach the mode sw. while setting the part t to the first

peak of the link plate gear, and join the joint u.

CAUTION:

When reattaching the mode sw., check if the points y and

z are correctly fitted and if each part operates properly.

Fig.24

Fig.25

Fig.26

Select lock arm

Hook w

Boss x

Select lock arm spring

Joint v

Link plate

Joint t

Point z

Point y

Select

lock arm

Mode sw.

Joint t

Joint u

Link plate

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

1-20 (No.MA188)

3.2.13 Removing the select arm R / link plate

(See Figs.27 and 28)

• Prior to performing the following procedure, remove the top

plate assembly.

(1) Bring up the select arm R to release from the link plate

(joint a') and turn as shown in the figure to release the two

joints b' and joint c'.

(2) Move the link plate in the direction of the arrow to release

the joint d'. Remove the link plate spring at the same time.

REFERENCE:

Before removing the link plate, remove the mode sw..

Fig.27

Fig.28

3.2.14 Reattaching the Select arm R / link plate

(See Figs.29 and 30)

REFERENCE:

Reverse the above removing procedure.

(1) Reattach the link plate spring.

(2) Reattach the link plate to the link plate spring while joining

them at joint d'.

(3) Reattach the joint a' of the select arm Rto the first peak of

the link plate while joining the two joints b' with the slots.

Then turn the select arm R as shown in the figure. The top

plate is joined to the joint c'.

CAUTION:

When reattaching the select arm R, check if the points e'

and f' are correctly fitted and if each part operates prop-

erly.

Fig.29

Fig.30

Joint r

Link plate

Joint b'

Joint c'

Select arm R

Joint a'

Top plate

Link plate

Link plate spring

Joint d'

Select arm R Joint c'

Joint d'

Link plate spring

Joint b'

Joint b' Joint a'

Link plate

Joint a'

Point e' Point f'

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

JVC KD-G269 User manual

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