JVC KD-AR770J Bedienungsanleitung

SERVICE MANUAL

2006/2

CD RECEIVER

MA24720062

KD-AR770J,KD-G720J,KD-G721E,KD-G721EX,

KD-G721EY,KD-G721EU,KD-G722E,KD-G722EX,

KD-G722EY,KD-G722EU,KD-G724UI,KD-G725U,

KD-G725UN,KD-G725UH,KD-G725UT,KD-G727EE

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

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

1-2 (No.MA247)

SPECIFICATION

KD-AR770/KD-G720

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 ±10 dB at 100 Hz

Treble ±10 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Line-Out Level/Impedance KD-AR770 4.0 V /20 kΩload (full scale)

KD-G720 2.5 V /20 kΩload (full scale)

Output Impedance 1 kΩ

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

Other Terminals CD changer

LINE IN plugs (only for KD-AR770)

TUNER SECTION

Frequency Range FM 87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz)

87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz)

AM 530 kHz to 1 710 kHz

(with channel interval set to 10 kHz)

531 kHz to 1 602 kHz

(with channel interval set to 9 kHz)

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 35 dB

AM Tuner Sensitivity 20 µV

Selectivity 35 dB

CD PLAYER/USB MEMORY 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

Playable USB memory Format FAT 12/16/32

Storage Less than 4 GB (1 partition type)

Playable Audio Format MP3/WMA

Max. Current Less than 500 mA

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 ×152 mm (7-3/16" ×2-1/16" ×6")

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

Mass (approx.) 1.4 kg (3.1 lbs) (excluding accessories)

(No.MA247)1-3

KD-G722/KD-G721

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 50 W per channel

Rear 50 W per channel

Continuous Power Output (RMS) Front 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

harmonic distortion.

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 ±10 dB at 100 Hz

Treble ±10 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

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)

Other Terminals CD changer, Steering wheel remote input

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

AM (MW) 522 kHz to 1 620 kHz

(LW) 144 kHz to 279 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

MW Tuner Sensitivity 20 µV

Selectivity 35 dB

[LW Tuner] Sensitivity 50 µV

CD PLAYER/USB MEMORY 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

Playable USB memory Format FAT 12/16/32

Storage Less than 4 GB (1 partition type)

Playable Audio Format MP3/WMA

Max. Current Less than 500 mA

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 ×152 mm

Panel Size (approx.) 188 mm ×58 mm ×11 mm

Mass (approx.) 1.4 kg (excluding accessories)

1-4 (No.MA247)

KD-G724

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 50 W per channel

Rear 50 W per channel

Continuous Power Output (RMS) Front 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

harmonic distortion.

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 ±10 dB at 100 Hz

Treble ±10 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

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)

Other Terminal CD changer

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

AM 531 kHz to 1 602 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

AM Tuner Sensitivity 20 µV

Selectivity 35 dB

CD PLAYER/USB MEMORY 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

Playable USB memory Format FAT 12/16/32

Storage Less than 4 GB (1 partition type)

Playable Audio Format MP3/WMA

Max. Current Less than 500 mA

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 ×152 mm

Panel Size (approx.) 188 mm ×58 mm ×11 mm

Mass (approx.) 1.4 kg (excluding accessories)

(No.MA247)1-5

KD-G725

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 50 W per channel

Rear 50 W per channel

Continuous Power Output (RMS) Front 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

harmonic distortion.

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 ±10 dB at 100 Hz

Treble ±10 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

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)

Other Terminal CD changer

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

AM 531 kHz to 1 602 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

AM Tuner Sensitivity 20 µV

Selectivity 35 dB

CD PLAYER/USB MEMORY 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

Playable USB memory Format FAT 12/16/32

Storage Less than 4 GB (1 partition type)

Playable Audio Format MP3/WMA

Max. Current Less than 500 mA

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 ×152 mm

Panel Size (approx.) 188 mm ×58 mm ×11 mm

Mass (approx.) 1.4 kg (excluding accessories)

1-6 (No.MA247)

KD-G727

• Design and specifications are subject to change without notice.

• Microsoft and Windows Media are either registered trademarks or trademarks of Microsoft Corporation in the United States and/

or other countries.

• iPod is a trademark of Apple Computer, Inc., registered in the U.S. and other countries.

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 50 W per channel

Rear 50 W per channel

Continuous Power Output (RMS) Front 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

harmonic distortion.

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 ±10 dB at 100 Hz

Treble ±10 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

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)

Other Terminal CD changer

TUNER SECTION

Frequency Range FM1/FM2 87.5 MHz to 108.0 MHz

FM3 65.00 MHz to 74.00 MHz

AM (MW) 522 kHz to 1 620 kHz

(LW) 144 kHz to 279 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

MW Tuner Sensitivity 20 µV

Selectivity 35 dB

LW Tuner Sensitivity 50 µV

CD PLAYER/USB MEMORY 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

Playable USB memory Format FAT 12/16/32

Storage Less than 4 GB (1 partition type)

Playable Audio Format MP3/WMA

Max. Current Less than 500 mA

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 ×152 mm

Panel Size (approx.) 188 mm ×58 mm ×11 mm

Mass (approx.) 1.4 kg (excluding accessories)

(No.MA247)1-7

SECTION 1

PRECAUTIONS

1.1 Safety Precautions

!Burrs formed during molding may be left over on some parts of the chassis. Therefore,

pay attention to such burrs in the case of preforming repair of this system.

!Please use enough caution not to see the beam directly or touch it in case of an

adjustment or operation check.

1-8 (No.MA247)

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 flexible wire is disconnected from the connector on the pickup unit.

(If the flexible 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 flexible wire.

(caption)

Anti-static wrist strap

Conductive material

(conductive sheet) or iron plate

Pickup

Short-circuit point

(Soldering)

Flexible wire

(No.MA247)1-9

1.5 Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace

the complete Laser Unit if it malfunctions.

4.CAUTION : The CD,MD and DVD player uses invisible

laser radiation and is equipped with safety switches which

prevent emission of radiation when the drawer is open and

the safety interlocks have failed or are defeated. It is

dangerous to defeat the safety switches.

5.CAUTION : If safety switches malfunction, the laser is able

to function.

6.CAUTION : Use of controls, adjustments or performance of

procedures other than those specified here in may result in

hazardous radiation exposure.

REPRODUCTION AND POSITION OF LABELS

Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

WARNING LABEL

CAUTION : Visible and Invisible

laser radiation when open and

interlock failed or defeated.

AVOID DIRECT EXPOSURE TO

BEAM. (e)

VARNING : Synlig och

osynling laserstrålning när

den öppnas och spärren är

urkopplad. Betrakta ej

strålen. (s)

VARO : Avattaessa ja suojalukitus

ohitettuna tai viallisena olet alttiina

näkyvälle ja näkymättömälle

lasersäteilylle. Vältä säteen

kohdistumista suoraan itseesi. (f)

ADVARSEL : Synlig og usynlig

laserstråling når maskinen er

åben eller interlocken fejeler.

Undgå direkte eksponering til

stråling. (d)

CLASS 1

LASER PRODUCT

1-10 (No.MA247)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 DIFFERENT POINT

KD-AR770 KD-G720 KD-G721 KD-G722 KD-G724 KD-G725 KD-G727

SAT READY YES YES NO NO NO NO NO

RDS NO NO YES YES NO NO YES

LINEINplugYESNONONONONONO

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