JVC KDAR-870, KDG-820-J, KDG-821-E, KDG-821-EU, KDG-821-EX Service manual

...

SERVICE MANUAL

CD RECEIVER

MA24920062

KD-AR870J,KD-G820J,KD-G821E,

KD-G821EX,KD-G821EY,KD-G821EU,

KD-G824UI,KD-G825U,KD-G825UN,

KD-G825UH,KD-G825UT,KD-G827EE

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

No.MA249

2006/2

SPECIFICATION

KD-AR870/KD-G820

AUDIO AMPLIFIER SECTION

Power Output 20 W RMS

Signal to Noise Ratio 80 dBA (reference: 1 W into 4

Load Impedance 4

Tone Control Range Low ±12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz)

Mid ±12 dB (500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz)

High ±12 dB (10 kHz, 12.5 kHz, 15 kHz,17.5 kHz)

Frequency Response 40 Hz to 20 000 Hz

Line-In Level/Impedance KD-AR870 1.5V/20k

Line-Out Level/Impedance KD-AR870 5.0 V/20 k

KD-G820 4.0 V/20 k

Output Impedance 1 k

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

Other Terminals CD changer, LINE IN (for KD-AR870)

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

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

FM Tuner Usable Sensitivity 11.3 dBf (1.0

50 dB Quieting Sensitivity 16.3 dBf (1.8

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 35 dB

AM Tuner Sensitivity 20

Selectivity 35 dB

CD PLAYER/USB MEMORY SECTION

Type Compact disc player

Signal Detection System Non-contact optical

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

WMA (Windows Media® Audio) Decoding 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

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0

Dimensions (W

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

× H × D) Installation Size (approx.) 182 mm × 52 mm × 152 mm (7-3/16" × 2-1/16" × 6")

Panel Size (approx.) 188 mm

Ω (4 Ω to 8 Ω allowance)

Ω

TUNER SECTION

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

531 kHz to 1 602 kHz (with channel interval set to 9 kHz)

µV

Max. Bit Rate : 320 kbps

GENERAL

°C to +40°C (32°F to 104°F)

× 4 Channels at 4 Ω and [< or =] 1% THD+N

Ω)

Ω load

Ω load (full scale) Ω load (full scale)

µV/75 Ω) µV/75 Ω)

pickup (semiconductor laser)

× 58 mm × 11 mm (7-7/16" × 2-5/16" × 7/16")

1-2 (No.MA249)

KD-G821

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

harmonic distortion.

Rear 19 W per channel into 4

harmonic distortion.

Load Impedance 4

Tone Control Range Low ±12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz)

Mid ±12 dB (500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz)

High ±12 dB (10 kHz, 12.5 kHz, 15 kHz, 17.5 kHz)

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out Level/Impedance 5.0 V/20 k

Output Impedance 1 k

Subwoofer-Out Level/Impedance 2.0 V/20 kΩ load (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

FM Tuner Usable Sensitivity 11.3 dBf (1.0

50 dB Quieting Sensitivity 16.3 dBf (1.8

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

MW Tuner Sensitivity 20

Selectivity 35 dB

LW Tuner Sensitivity 50

CD PLAYER/USB MEMORY SECTION

Type Compact disc player

Signal Detection System Non-contact optical

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

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

Dimensions (W

Mass (approx.) 1.4 kg (excluding accessories)

× H × D) Installation Size (approx.) 182 mm × 52 mm × 152 mm

Panel Size (approx.) 188 mm

Ω (4 Ω to 8 Ω allowance)

Ω load (full scale)

Ω

(LW) 144 kHz to 279 kHz

µV/75 Ω) µV/75 Ω)

µV

Max. Bit Rate : 320 kbps

°C to +40°C

× 58 mm × 11 mm

Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

pickup (semiconductor laser)

(No.MA249)1-3

KD-G824

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

harmonic distortion.

Rear 19 W per channel into 4

harmonic distortion.

Load Impedance 4

Tone Control Range Low ±12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz)

Mid ±12 dB (500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz)

High ±12 dB (10 kHz, 12.5 kHz, 15 kHz, 17.5 kHz)

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out Level/Impedance 5.0 V/20 k

Output Impedance 1 k

Subwoofer-Out Level/Impedance 2.0 V/20 kΩ load (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

50 dB Quieting Sensitivity 16.3 dBf (1.8

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

AM Tuner Sensitivity 20

Selectivity 35 dB

CD PLAYER/USB MEMORY SECTION

Type Compact disc player

Signal Detection System Non-contact optical

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

WMA (Windows Media® Audio) Decoding 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

Dimensions (W

Mass (approx.) 1.4 kg (excluding accessories)

× H × D) Installation Size (approx.) 182 mm × 52 mm × 152 mm

Panel Size (approx.) 188 mm

Ω (4 Ω to 8 Ω allowance)

Ω load (full scale)

Ω

µV/75 Ω) µV/75 Ω)

µV

Max. Bit Rate : 320 kbps

°C to +40°C

× 58 mm × 11 mm

Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

pickup (semiconductor laser)

1-4 (No.MA249)

KD-G825

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

harmonic distortion.

Rear 19 W per channel into 4

harmonic distortion.

Load Impedance 4

Tone Control Range Low ±12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz)

Mid ±12 dB (500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz)

High ±12 dB (10 kHz, 12.5 kHz, 15 kHz, 17.5 kHz)

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out Level/Impedance 5.0 V/20 k

Output Impedance 1 k

Subwoofer-Out Level/Impedance 2.0 V/20 kΩ load (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

50 dB Quieting Sensitivity 16.3 dBf (1.8

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

AM Tuner Sensitivity 20

Selectivity 35 dB

CD PLAYER/USB MEMORY SECTION

Type Compact disc player

Signal Detection System Non-contact optical

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

WMA (Windows Media® Audio) Decoding 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

Dimensions (W

Mass (approx.) 1.4 kg (excluding accessories)

× H × D) Installation Size (approx.) 182 mm × 52 mm × 152 mm

Panel Size (approx.) 188 mm

Ω (4 Ω to 8 Ω allowance)

Ω load (full scale)

Ω

µV/75 Ω) µV/75 Ω)

µV

Max. Bit Rate : 320 kbps

°C to +40°C

× 58 mm × 11 mm

Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

pickup (semiconductor laser)

(No.MA249)1-5

KD-G827

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

harmonic distortion.

Rear 19 W per channel into 4

harmonic distortion.

Load Impedance 4

Tone Control Range Low ±12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz)

Mid ±12 dB (500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz)

High ±12 dB (10 kHz, 12.5 kHz, 15 kHz, 17.5 kHz)

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out Level/Impedance 5.0 V/20 k

Output Impedance 1 k

Subwoofer-Out Level/Impedance 2.0 V/20 kΩ load (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

FM Tuner Usable Sensitivity 11.3 dBf (1.0

50 dB Quieting Sensitivity 16.3 dBf (1.8

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

MW Tuner Sensitivity 20

Selectivity 35 dB

LW Tuner Sensitivity 50

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

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

Dimensions (W

Mass (approx.) 1.4 kg (excluding accessories)

× H × D) Installation Size (approx.) 182 mm × 52 mm × 152 mm

Panel Size (approx.) 188 mm

Ω (4 Ω to 8 Ω allowance)

Ω load (full scale)

Ω

(LW) 144 kHz to 279 kHz

µV/75 Ω) µV/75 Ω)

µV

Max. Bit Rate : 320 kbps

°C to +40°C

× 58 mm × 11 mm

Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

• 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.

1-6 (No.MA249)

1.1 Safety Precautions

SECTION 1

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.MA249)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.

(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 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.

Short-circuit point

(Soldering)

Flexible wire

1-8 (No.MA249)

Pickup

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.

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

WARNING LABEL

CAUTION : Visible and Invisible

CLASS 1 LASER PRODUCT

laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e)

ADVARSEL : Synlig og usynlig laserstråling når maskinen er åben eller interlocken fejeler. Undgå direkte eksponering til stråling. (d)

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)

(No.MA249)1-9

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 DIFFERENT POINT

KD-AR870 KD-G820 KD-G821 KD-G824 KD-G825 KD-G827

LINE IN YES NO NO NO NO NO

RDS NO NO YES NO NO NO

STEERING WHEEL REMOTE INPUT NO NO YES NO NO NO

1-10 (No.MA249)

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the front panel assembly (See Fig.1)

(1) Push the control panel release button in the lower left part

of the front panel assembly and remove the front panel assembly.

(2) Take out the front panel assembly.

3.1.2 Removing the bottom cover (See Fig.2)

(1) Turn the main body up side down. (2) Insert a screwdriver under the joints to release the joints a

on the left side, joints b on the right side and joint c on the back side of the main body, then remove the bottom cover from the main body.

Caution:

When releasing the joints using a screwdriver, do not damage the main board.

Front panel assembly

Control panel release button

Fig.1

Bottom cover

Fig.2

(No.MA249)1-11

3.1.3 Removing the front chassis assembly (See Figs.3 and 4)

• Remove the front panel assembly and bottom cover.

(1) Remove the two screws A on the front side of the main

body. (See Fig.3)

(2) Remove the two screws B on the both sides of the main

body. (See Fig.4)

(3) Release the joints d and joints e on the both sides of the

main body, and then remove the front chassis assembly toward the front. (See Fig.4)

Front chassis assembly

Fig.3

3.1.4 Removing the side panel (See Fig.5)

Reference:

Remove the front panel assembly as required. (1) Remove the two screws C and three screws D attaching

the side panel on the left side of the main body.

(2) Take out the side panel from the main body.

Front chassis assembly

C C

Side panel

Fig.4

Fig.5

1-12 (No.MA249)

3.1.5 Removing the rear bracket

(See Fig.6) [For KD-AR870, KD-G820 and KD-G821]

• Remove the bottom cover.

(1) Remove the four screws E, two screws F and two screws

G attaching the rear bracket on the back side of the main body.

(2) Take out the rear bracket.

3.1.6 Removing the rear bracket

(See Fig.6) [For KD-G824, KD-G825 and KD-G827]

• Remove the bottom cover.

(1) Remove the three screws E, three screws F and two

screws G attaching the rear bracket on the back side of the main body.

(2) Take out the rear bracket.

3.1.7 Removing the main board

(See Figs.6 to 8)

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

assembly and side panel. (1) Remove the four screws E for KD-AR870, KD-G820 and

KD-G821 or three screws E for KD-G824, KD-G825 and KD-G827 attaching the rear bracket on the back side of the main body. (See Fig.6.)

(2) Remove the three screws H attaching the main board. (See

Fig.7)

(3) Disconnect the connector CN501

board. (See Fig.7)

(4) Remove the one screw J attaching the USB board. (See

Fig.8)

Reference:

Remove the rear bracket as required.

and take out the main

for KD-AR870, KD-G820, KD-G821

Rear bracket

E EE

for KD-G824, KD-G825,KD-G827

Rear bracket

E E

Fig.6

Main board

CN501

CD mechanism assembly

Rear bracket

Fig.7

Main board

Fig.8

(No.MA249)1-13

3.1.8 Removing the CD mechanism assembly (See Fig.9)

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

assembly, side panel, main board and CD mechanism control board. (1) Remove the three screws K attaching the top chassis. (2) Take out the CD mechanism assembly.

3.1.9 Removing the switch board (See Figs.10 to 13)

• Remove the front panel assembly.

(1) Release the main volume knob from the front panel assem-

bly. (See Fig.10)

(2) Remove the five screws L and one screw M attaching the

front panel assembly. (See Fig.11)

(3) Release the nine joints f and take out the rear cover. (See

Fig.12)

(4) Lift the switch board from the front panel assembly little by

little and take out the switch board. (See Fig.13)

CD mechanism assembly

Volume knob

Front panel assembly

Rear cover

Fig.9

Fig.10

Fig.11

Rear cover

Top chassis

3.2 CD mechanism section

For the CD mechanism, please refer the mechanism manual TN2001-1118 (No.MY004).

1-14 (No.MA249)

Fig.12

Switch board

Fig.13

SECTION 4

ADJUSTMENT

4.1 Adjustment method

 Test instruments required for adjustment

(1) Digital oscilloscope (100MHz) (2) Electric voltmeter (3) Digital tester (4) Tracking offset meter (5) Test Disc JVC :CTS-1000 (6) Extension cable for check

EXTSH002-22P × 1

 Standard volume position

Balance and Bass &Treble volume : lndication"0" Loudness : OFF

 How to connect the extension cable for adjusting

Caution:

Be sure to attach the heat sink and rear bracket onto the power amplifier IC and regulator IC respectively, before supply the power. If voltage is applied without attaching these parts, the power amplifier IC and regulator IC will be destroyed by heat.

 Standard measuring conditions

Power supply voltage DC14.4V(11 to 16V)

Load impedance 20KΩ(2 Speakers connection)

Output Level KD-ARXXX Line out 4.0V (Vol. MAX)

KD-GXXX Line out 2.5V (Vol. MAX)

 Dummy load

Exclusive dummy load should be used for AM,and FM. For FM dummy load,there is a loss of 6dB between SSG output and antenna input.The loss of 6dB need not be considered since direct reading of figures are applied in this working standard.

EXTSH002-22P

Side panel

CN501

Rear bracket

(No.MA249)1-15

5.1 Feed section

SECTION 5

TROUBLESHOOTING

5.2 Focus section

Is 4V present at both sides of the feed motor?

Is the voltage output at pin 4 and pin 5 of IC501?

Is the voltage input at pin 28 of IC501?

Is the voltage output at pin 12 of IC541?

Is the power supply present at pins 8,16,25, 28,32,53,71 and pin 90 of IC541?

Check the connections of CD8V power supply.

YES

Check the feed motor.

Check the connections

YES

between the feed motor and IC501.

Is the power supply

YES YES

present at pin 3, pin 12 and pin 21 of IC501?

Check the connections of CD8V power supply.

Check the connections

YES

between IC501 and IC541.

YES

Check IC541.

Check IC501.

When the lens is moving:

Does the S-search waveform appear at IC501 pins 8 and 9?

Is the voltage input at pin 15 of IC501?

Is the voltage output at pin 9 of IC541?

Is the power supply present at pins 8,16,25, 28,32,53,71 and pin 90 of IC541?

Check the connections of CD8V power supply.

YES

Check the pickup and its connections.

Is the power supply present at pin 3, pin 12 and pin 21 of IC501?

Check the connections of CD8V power supply.

Check the connections between IC501 and IC541.

Check IC541.

YES

Check IC501.

1-16 (No.MA249)

5.3 Spindle section

Is the disk rotated?

Is the voltage output at pin 6 and pin 7 of IC501?

Is the voltage input at pin 17 of IC501?

Is the voltage output at pin 13 of IC541?

Is the power supply present at pins 8,16,25, 28,32,53,71 and pin 90 of IC541?

YES

Does the RF signal appear at pin 83 of IC541?

YES

Check the spindle motor and its wiring.

Is the power supply

YES

present at pin 3, pin 12 and pin 21 of IC501?

Check the connections of CD8V power supply.

Check the connections

YES

between IC501 and IC541.

YES

Check IC541.

YES

Is the RF waveform at pin 83 of IC541 distorted?

NONO

Check the circuits in the vicinity of IC541 or the pickup.

Check IC501.

YES

Proceed to the Tracking section.

Check the connections of CD8V power supply.

5.4 Tracking section

When the disc is rotated at first:

Approx. 1.2V

Is the tracking error signal output at pin 6 of IC541?

Check the pickup and its connections.

Replace IC541 or repair

YES

the malfunction connection point.

(No.MA249)1-17

5.5 Signal processing section

Is the sound output from both channels (L, R)?

No sound from either channel.

Compare the L-ch and R-ch to locate the defective point.

5.6 Maintenance of laser pickup

(1) Cleaning the pick up lens

Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab.

(2) Life of the laser diode

When the life of the laser diode has expired, the following symptoms will appear.

• The level of RF output (EFM output: amplitude of eye pattern) will be low.

YES

Normal

YES

Is 9V present at pin 24 of IC161?

Is 9V present at pin 13 of IC901?

Check IC901 and its peripheral circuits.

Is the audio signal (including sampling

YES

output components) output to pins 1 and 7 of IC581 during playback?

Check IC581 and its peripheral circuits.

Check the connections

YES

between pin 24 of IC161 and pin 13 of IC901.

5.7 Replacement of laser pickup

Turn off the power switch and disconnect the power cord.

Replace the pickup with a normal one. (Refer to "Removing the pickup unit" on the previous page.)

Is the audio signal output

YES

at pin 18 and pin 19 of IC161 during playback?

Check IC161 and its peripheral circuits.

Check the power amplifier IC301.

YES

Is RF output

1.3 0.4Vp-p?

Replace it.

YES

(3) Semi-fixed resistor on the APC PC board

The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value, the laser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functioning normally, the laser pickup may be damaged due to excessive current.

Plug the power cord in and turn the power on. At this time, check that the laser emits for about seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at

RF test point or

ARF test point.

Finish.

1-18 (No.MA249)

5.8 16P CORD DIAGRAM (for KD-AR870)

BL/WH

BK RD

OR/WH

WH/BK

GN/BK

VI/BK

GY/BK

16 YL

8 BK

7 RD

15 OR/WH

13 BR TEL

5 BL/WH

3 GN

MEMORY

GND

ACC

ILL

REMOTE

RL+

CAUTION!

REMOTE

ONLY

OUTPUT

Black

Red

Blue

White

Brown

Green

Violet

Gray

Yellow

Orange

GND

11 GN/BK

10 VI/BK

12 WH/BK

TEL

2 VI

4 WH

1 GY

9 GY/BK

Rear Right

Front Right

Front Left

Rear Left

Telephone muting

RL-

RR+

RR-

FL+

FL-

FR+

FR-

REMOTE

ACC

MEMORY

GND

ILL

Remote out

ACC Line

Memory Backup Battery +

Ground

Illuminations Control

(No.MA249)1-19

5.9 16 PIN CORD DIAGRAM (for KD-G820)

BL/WH

BK RD

OR/WH

WH/BK

GN/BK

VI/BK

GY/BK

16 YL

8 BK

7 RD

15 OR/WH

5 BL/WH

3 GN

MEMORY

GND

ACC

ILL

REMOTE

RL+

REMOTE

CAUTION!

ONLY

OUTPUT

Black

Red

Blue

White

Green

Violet

Gray

Yellow

Orange

GND

11 GN/BK

2 VI

10 VI/BK

4 WH

12 WH/BK

1 GY

9 GY/BK

Rear Right

Front Right

Front Left

Rear Left

RL-

RR+

RR-

FL+

FL-

FR+

FR-

REMOTE

ACC

MEMORY

GND

ILL

Remote out

ACC Line

Memory Backup Battery +

Ground

Illuminations Control

1-20 (No.MA249)

5.10 16 PIN CORD DIAGRAM (for KD-G821,KD-G827)

7 6

BL/WH

4 3

7 RD

16 YL

15 OR/WH

8 BK

6 BL/WH

13 BR

OR/WH

WH/BK

GN/BK

VI/BK

GY/BK

16 15

14 13

11 10

ACC

MEMORY

ILL

GND

REMOTE

TEL

Black

Red

Blue

White

Brown

Green

Violet

Gray

Yellow

Orange

3 5

RD 7

YL 4

BL/WH

OR/WH

3 GN

11 GN/BK

2 VI

10 VI/BK

4 WH

12 WH/BK

1 GY

9 GY/BK

Rear Right

Front Right

Front Left

RL+

RL-

RR+

RR-

FL+

FL-

FR+

FR-

ANT

ACC

TEL

Auto Antenna

ACC Line

Telephone Muting

VI/BK

GY/BK

WH/BK

GN/BK

1 3

REMOTE

ILL

Rear Left

Remote

Illuminations Control

GND

MEMORY

Ground

Memory Backup Battery+

(No.MA249)1-21

5.11 16 PIN CORD DIAGRAM (for KD-G824,KD-G825)

BL/WH

OR/WH

WH/BK

GN/BK

VI/BK

GY/BK

16 YL

8 BK

7 RD

15 OR/WH

13 BR

3 GN

11 GN/BK

Black

Red

Blue

WH White

MEMORY

GND

ACC

ILL

TEL

RL+

RL-

Brown

Green

VI Violet

Gray

Yellow

OR Orange

GND

2 VI

10 VI/BK

4 WH

12 WH/BK

1 GY

9 GY/BK

5 BL/WH

6 BL

Rear Right

Front Right

Front Left

RR+

RR-

FL+

FL-

FR+

FR-

REMOTE

ANT

REMOTE

CAUTION!

POWER

ANT

ACC

ILL

OUTPUT ONLY

ANTENNA

Auto Antenna

ACC Line

Illuminations Control

REMOTE

TEL

1-22 (No.MA249)

Rear Left

Remote out

Telephone muting

GND

MEMORY

Ground

Memory Backup Battery+

(No.MA249)1-23

Victor Company of Japan, Limited Mobile Entertainment Business Group Mobile Entertainment Category 10-1,1chome,Ohwatari-machi,Maebashi-city,Gumma-ken, 371-8543,Japan

(No.MA249)

Printed in Japan

VPT

+ 55 hidden pages