JVC KD-R420, KD-R421, KD-R422, KD-R424, KD-R425 Service manual

SERVICE MANUAL

CD RECEIVER

MA478<Rev.001>201011SERVICE MANUAL

KD-R420J, KD-R421E, KD-R421EU, KD-R421EY,
KD-R422E, KD-R422EU, KD-R422EY, KD-R424UI,
KD-R425U, KD-R425UH, KD-R425UN, KD-R426U,

KD-R426UH, KD-R426UN, KD-R426UT,

KD-R427EE, KD-R428J, KD-R428UF, KD-R45E,

KD-R45EY, KD-R47EE, KD-R527EE

KD-R421,KD-R422

KD-R427, KD-R45,

KD-R47, KD-R527

ONLY

KD-R420,KD-R424,
KD-R425,KD-R426,

KD-R428

ONLY

KD-R420,KD-R428

ONLY

COPYRIGHT © 2010 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

COPYRIGHT © 2010 Victor Company of Japan, Limited

No.MA478<Rev.001>

2010/11

SPECIFICATION

[KD-R424, KD-R425, KD-R426]

AUDIO AMPLIFIER SECTION

Maximum Power Output 50 W per channel
Continuous Power Output(RMS)
Signal-to-Noise Ratio 70 dB

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Frequency Response 40 Hz to 20 000 Hz

Line-Out or Subwoofer-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Output Impedance 1 kΩ

Other Terminal

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

FM Tuner Usable Sensitivity 9.3 dBf (0.8 µV/75 Ω)

AM Tuner Sensitivity/Selectivity 20 µV/40 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
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

USB SECTION

USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Max. 12 Mbps
Compatible Device Mass Storage Class
Compatible File System FAT 32/16/12
Playable Audio Format MP3/WMA
Max. Current DC 5 V 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):(approx.) Installation Size 182 mm × 52 mm × 159 mm

Mass 1.2 kg (excluding accessories)

• 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.

®

Audio) Decoding Format Max. Bit Rate 192 kbps

20 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 1% total harmonic distortion.

USB input terminal, Front auxiliary input jack, Rear auxiliary/Bluetooth adapter input
jack, Antenna terminal

AM 531 kHz to 1611 kHz

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 40 dB

Panel Size 188 mm × 59 mm × 9 mm

1-2 (No.MA478<Rev.001>)

SPECIFICATION

[KD-R420,KD-R428]

AUDIO AMPLIFIER SECTION

Power Output 20 W RMS × 4 Channels at 4 Ω and ≤ 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)

Frequency Response 40 Hz to 20 000 Hz

Line-Out or Subwoofer-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Output Impedance 1 kΩ

Other Terminal

TUNER SECTION

Frequency Range FM with channel interval set to 200 kHz 87.9 MHz to 107.9 MHz

FM Tuner Usable Sensitivity 9.3 dBf (0.8 µV/75 Ω)

AM Tuner Sensitivity/Selectivity 20 µV/40 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
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format

(MPEG1/2 Audio Layer 3)
WMA (Windows Media

Decoding Format

USB SECTION

USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Max. 12 Mbps
Compatible Device Mass Storage Class
Compatible File System FAT 32/16/12
Playable Audio Format MP3/WMA
Max. Current DC 5 V 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):(approx.) Installation Size 182 mm × 52 mm × 159 mm(7-3/16” × 2-1/16” × 6-5/16”)

Mass 1.2 kg (2.8 lbs) (excluding accessories)

• Subject to change without notice.

• If a kit is necessary for your car, consult your telephone directory for the nearest car audio speciality shop.

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

®

Audio)

USB input terminal, Front auxiliary input jack, Rear auxiliary/Bluetooth adapter input jack,
Antenna terminal

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 1700 kHz

with channel interval set to 9 kHz 531 kHz to 1611 kHz

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 40 dB

Max. Bit Rate 320 kbps

Max. Bit Rate 192 kbps

Panel Size 188 mm × 59 mm × 9 mm(7-7/16” × 2-3/8” × 3/8”)

65 dB

(No.MA478<Rev.001>)1-3

SPECIFICATION

[KD-R421, KD-R422, KD-R45]

AUDIO AMPLIFIER SECTION

Maximum Power Output Front/Rear 50 W per channel

Continuous Power Output(RMS)

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out or Subwoofer-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Output Impedance ≤ 600 Ω

Other Terminal

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

FM Tuner Usable Sensitivity 9.3 dBf (0.8 µV/75 Ω)

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

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

(R)

WMA (Windows Media

Audio) Decoding Format Max. Bit Rate 192 kbps

USB SECTION

USB Standard USB 1.1, USB 2.0

Data Transfer Rate (Full Speed) Max. 12 Mbps

Compatible Device Mass Storage Class

Compatible File System FAT 32/16/12

Playable Audio Format MP3/WMA

Max. Current DC 5 V 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):(approx.) Installation Size 182 mm × 52 mm × 159 mm

Mass 1.2 kg (excluding accessories)

• 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.

Front/Rear 20 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more

than 1% total harmonic distortion.

USB input terminal, Front auxiliary input jack, Rear auxiliary/Bluetooth adapter input
jack, Antenna terminal

AM MW 531 kHz to 1611 kHz

LW 153 kHz to 279 kHz

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

Alternate Channel Selectivity

65 dB

(400 kHz)

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 40 dB

MW Tuner Sensitivity/Selectivity 20 µV/40 dB
LW Tuner Sensitivity 50 µV

Panel Size 188 mm × 59 mm × 9 mm

1-4 (No.MA478<Rev.001>)

SPECIFICATION

[KD-R427, KD-R47, KD-R527]

AUDIO AMPLIFIER SECTION

Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output(RMS)

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB

Line-Out or Subwoofer-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Output Impedance ≤ 600 Ω

Other Terminal

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

FM Tuner Usable Sensitivity 9.3 dBf (0.8 µV/75 Ω)

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
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

(R)

WMA (Windows Media

Audio) Decoding Format Max. Bit Rate 192 kbps

USB SECTION

USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Max. 12 Mbps
Compatible Device Mass Storage Class
Compatible File System FAT 32/16/12
Playable Audio Format MP3/WMA
Max. Current DC 5 V 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):(approx.) Installation Size 182 mm × 52 mm × 159 mm

Mass 1.2 kg (excluding accessories)

• 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.

Front/Rear 20 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more

than 1% total harmonic distortion.

USB input terminal, Front auxiliary input jack, Rear auxiliary/Bluetooth adapter input
jack, Antenna terminal

FM-LO 65.0 MHz to 74.0 MHz
AM MW 531 kHz to 1611 kHz

LW 153 kHz to 279 kHz

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

Alternate Channel Selectivity

65 dB

(400 kHz)
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 40 dB

MW Tuner Sensitivity/Selectivity 20 µV/40 dB
LW Tuner Sensitivity 50 µV

Panel Size 188 mm × 59 mm × 9 mm

(No.MA478<Rev.001>)1-5

SECTION 1

PRECAUTION

1.1 Safety Precautions

(1) This design of this product contains special hardware and

many circuits and components specially for safety purpos­es. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be per­formed by qualified personnel only.

(2) Alterations of the design or circuitry of the product should

not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.

(3) Many electrical and mechanical parts in the products have

special safety-related characteristics. These characteris­tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us­ing replacement components rated for higher voltage, watt­age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser­vice Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac­teristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.

(4) The leads in the products are routed and dressed with ties,

clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassem­bling.

(5) Leakage shock hazard testing

After reassembling the product, always perform an isola­tion check on the exposed metal parts of the product (an­tenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.

• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particular­ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur­rent must not exceed 0.5mA AC (r.m.s.).

• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an

AC voltmeter having, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-

posed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC

voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).

AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)

0.15 F AC TYPE

Place this
probe on

1500 10W

Good earth ground

1.2 Warning

(1) This equipment has been designed and manufactured to

meet international safety standards.

(2) It is the legal responsibility of the repairer to ensure that

these safety standards are maintained.

(3) Repairs must be made in accordance with the relevant

safety standards.

(4) It is essential that safety critical components are replaced

by approved parts.

(5) If mains voltage selector is provided, check setting for local

voltage.

1.3 Caution

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.

1.4 Critical parts for safety

In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)

each exposed
metal part.

1-6 (No.MA478<Rev.001>)

1.5 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.

1.5.1 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

1M

Conductive material
(conductive sheet) or iron palate

(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.

1.6 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) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1.7 Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for the pickup unit.

• Apply solder to the short land sections before the card wire is disconnected from the connector on the servo board. (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 sections after connecting the card wire.

SOLDER

(No.MA478<Rev.001>)1-7

1.8 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.MA478<Rev.001>)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

SECTION 3

DISASSEMBLY

3.1 Main body (Used model: KD-R421)

3.1.1 Removing the Bottom chassis (See Fig.1)

(1) Disengage the seven hooks a engaging the Bottom chas-

sis.

(2) Slide the Bottom chassis backward to remove it.

3.1.3 Removing the Main board (See Fig.3, 4 and 5)

(1) Remove the one screw A attaching the Rear Bracket. (See

Fig.3)

A

hook a

hook a

hook a

Fig.1

3.1.2 Removing the Front chassis (See Fig.2)

(1) Disengage the four hooks b engaging both sides of the

Front chassis.

hook b

Fig.2

Fig.3

(2) Remove the two screws B attaching both sides of the Side

panel. (See Fig.4)

B

Fig.4

(3) Remove the three screws C attaching the Main board. (See

Fig.5)

(4) Disconnect the board to board connector CN502

ing the Main board and the CD mechanism. (See Fig.5)

connect-

C

Fig.5

CN502

(No.MA478<Rev.001>)1-9

3.1.4 Removing the CD mechanism (See Fig.6)

(1) Remove the three screws D attaching the CD mechanism.

D

D

Fig.6

3.1.5 Removing the Switch board (See Fig.7)

(1) Remove the Volume knob.
(2) Remove the four screws E attaching the Rear cover.
(3) Disengage the twelve hooks c engaging the Rear cover.

hook c

D

BLACK

RED

WHITE

YELLOW

ORANGE

ORANGE

WHITE

YELLOW

Fig.2

(3) Disconnect the flexible wire from the pickup connected to

the connector CN102

on the Mecha control board. (See

Fig.3)

(4) Remove the two screws A attaching the Mecha control

board. (See Fig.3)

A

CN102

hook c

EE

Fig.7

3.2 CD mechanism assembly section

3.2.1 Removing the Mecha control board

(1) Solder the short land on the pickup. (See Fig. 1)

SOLDER

3.2.2 Removing the Traverse mechanism (See Fig.4, 5)

(1) Remove the five springs from the traverse mechanism.

(See Fig.4)

Fig.1

(2) Remove the eight wires from the Mecha control board.

(See Fig.2)

Fig.3

Fig.4

1-10 (No.MA478<Rev.001>)

(2) Remove the three screws B attaching the bottom frame as-

sembly. (See Fig.5)

(3) Remove the three dumpers from the bottom frame assem-

bly. (See Fig.5)

B

B

Fig.5

3.2.3 Removing the Pickup (See Fig.6, 7)

(1) Remove the two screws C attaching the feed bracket as-

sembly. (See Fig.6)

CC

(2) Remove the shaft from the TM base. (See Fig.7)
(3) Disengage the hook a on the pickup from the TM base.

(See Fig.7)

shaft

Fig.6

Fig.7

3.2.4 Removing the Spindle motor (See Fig.8. 9)

(1) Remove the HC CL. Spring from the HC CL. base and the

TM base, and then lift up the HC CL. base. (See Fig.8)

HC CL. spring

[ SIDE VIEW ]

Fig.8

(No.MA478<Rev.001>)1-11

(2) Remove the HC CL. base from th holes on the TM base.

(See Fig.9)

Fig.9

(3) Remove the two screws D attaching the spindle motor.

(See Fig.10)

D

3.2.5 Removing the Loading motor

(1) Remove the roller arm assembly from the bottom frame as-

sembly. (See Fig.11)

Fig.11

(2) Remove the two screws E attaching the loading motor as-

sembly, and then remove the loading motor assembly in
the direction of the arrow. (See Fig.12)

Fig.10

E

Fig.12

1-12 (No.MA478<Rev.001>)

SECTION 4

ADJUSTMENT

4.1 Test instruments required for adjustment

(1) Digital oscilloscope (100MHz)
(2) Digital tester
(3) Test Disc

4.2 Standard measuring conditions

Power supply voltage DC14.4V(10.5 to 16V)
Load impedance 20K ohm (2 Speakers connection)
Output Level Line out 2.5V (Vol. MAX)

4.5 4.5 How to connect the 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.

4.3 Standard volume position

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

4.4 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 sincedirect reading of
figures are applied in this working standard.

Original cable

(No.MA478<Rev.001>)1-13

4.6 Service mode

Operating Key : [MENU] → [DOWN] (7sec)

4.6.1 Mode content

Syscon shall display the information after entering this mode. The operation shown below shall be workable.

Display content Detail

S R V T E S T

The display is released when another operation is executed.

4.6.2 Common operation mode for all sources.

Operation Display content Detail

EQ CD error

information
display mode

MENU Syscon

UP Syscon

UP Power ON

DOWN Disc

DOWN Disc

BRIGHTNESS Disc eject



BRIGHTNESS

I<< Force

I<< Force Power

version
display

version
display

duration
clear

operation
duration
display

operation
duration clear

number of
times

Disc eject
number of
times clear

Power OFF
information
display

OFF
information clear

Transit CD error information display mode

S Y S #

@ @ @

P O N T M 0 H X X

P O N T M 0 X X X X

P O N T M 0 H 0 0

C D T M 0 H X X

C D T M X X X X X

C D T M 0 H 0 0

E J C N T X X X X X

E J C N T 0 H 0 0

P O F F - - -

P O F F P N L

P O F F - - -

# = Display of destination.
J = USA, R = EUROPE, E = EASTERN-EUROPE
U = OTHERS(eq. ASIS), @@@ = Syscon version

00~50 are displayed in " X X ".
For less than 1 hour, the display is indicated
per 10 minutes.

00001~10922 are displayed in " X X X X X ".
MAX 10922 (hours).

Clear Power ON duration by pressing for 2
seconds when Power ON duration is dis­played.

00~50 are displayed in " X X ".
For less than 1 hour, the display is indicated
per 10minutes.

00001~10922 are displayed in " X X X X X ".
MAX 10922 (hours).

Clear Disc operation duration by pressing
for 2 seconds when it is displated (Only the
displayed media is cleared).

Display Disc Eject number of times.
MAX 65535 (times)

Clear Disc Eject number of times by press­ing for 2 seconds when it is displayed.

No force Power OFF

Force Power OFF due to Syscon-Panel
commnication error.

Clear force Power OFF information by
pressing for 2 seconds when it is displayed.

1-14 (No.MA478<Rev.001>)

4.6.3 CD error information display mode

Opera­tion

Move

between

DISP

(Forward

search)
i t e m w i t h
I<< / >>I

EQ CD error

EQ Mode release CD error information display mode release Back to default status, All lights on

Display content Detail

CD
mecha error log
display

CD
load error
informationdisplay

CD
load error
informationdisplay

CD
time code
error count
informationdisplay
(count skip)

CD
time code error
count information
display
(no count update)

informationclear

M E C H E R #AXX

L O A D E R # X X

E J E C T E R # X X

C N T L O S E

C D D A XX

C D R O M X X

C N T S T A Y

C D D A XX

CD error information all clear

C D R O M X X

M E C H A E R 1 - -

Mecha error history 1,2,3 (latest)
# = History No. (1,2,3)
X X : number of errors, " -- " when there is none.

Load error switch 1,2
# = History No. (1,2)
X X : number of errors, " -- " when there is none.

Eject error switch 1,2,3,4
# = History No. (1,2,3,4)
X X : number of errors, " -- " when there is none.

CD time code error count information (count up­dated) mode display

CD-DA error count numbers
X X : numbers of errors and " -- " when there is
none

CD-ROM (compressed file) error count numbers
X X : numbers of errors and " -- " when there is none

CD time code error count information (count not
updated) mode display

CD-DA error count numbers
X X : numbers of errors and " -- " when there is none

CD-ROM (compressed file) error count numbers
X X : numbers of errors and " -- " when there is none

Clear CD error information by pressing for 2
seconds when it is displayed.

(No.MA478<Rev.001>)1-15

4.7 Service information clear mode

* The receiver is connected with the DC power supply (with the power supply turned off).

Operating Key : [BACK] → [POWER] → [DC power supply turned ON]

Mode content
After entering this mode, Syscom shall clear the information stored for service an output to the display.

Display content Detail

D A T A C L R O K

D A T A C L R N G

When normal end

When error end

4.7.1 The following table shows the data that is cleared.

Information for data clearing Detail

CD mecha information CD mecha log display

CD load error information display

CD eject error information display

CD time code error count information display (count skip)

CD time code error count information display (no count update)

Service information Power ON duration display

CD operation duration display

CD eject number of times display

Force power OFF information display

DC error information DC error 1 display (wrong connection and other detection

information in detectiong duration)

DC error 2 display (capacitor leakage detection number
information)

4.8 DC error information mode

* The receiver is connected with the DC power supply (with the power supply turned off).

Operating Key : [MENU] → [UP] → [DC power supply turned ON]

4.8.1 Mode content

Syscon shall display the following after entering this mode. The operation shown below shall be workable.

Display content Detail

D C E R R

D C O K

When DC error is detected (in case that one of capacitor
leakage, wrong connection or other detection is found).

When DC error is not detected (in case that none of capacitor
leakage, wrong connection or other detection is found).

4.8.2 Mode operation specification

Operation Display content Detail

UP DC ERR1

display

UP DC ERR1

clear

DOWN DC ERR2

display

DOWN DC ERR2

clear

D C 1 E R R

D C 1 O K

D C 1 O K

D C 2 4

D C 2 0

When wrong connection & DC error in other detection
duration is detected.

When wrong connection & DC error in other detection
duration is not detected.

Clear detection information when wrong connection & DC er­ror in other detection duration is displayed.(Clear data flash)

Display detecting number of times in capacitor leakage
detection duration (0~4)

Clear number of times for detection information in ca­pacitor leakage detection duration.(Clear data flash)

1-16 (No.MA478<Rev.001>)

5.1 16PIN CORD DIAGRAM

5.1.1 For KD-R420

SECTION 5

TROUBLESHOOTING

1

16

2

9

10

8

7

6

5

3

2

1

BK

YL

RD

GN

GN / BK

WH

WH/BK

GY/BK

NC

BL/WH

RD

BK

GN

GN/BK

VI/BK

VIGY

NC

BR

OR/WH

YL

10

11

12

134

14

15

16

9

BK

RD

BL

WH

GY

Black

Red

Blue

White

Gray

GN

Green

VI

Violet

BR Brown

OrangeOR

Yellow

YL

12

11

15

3

14

8

7

5

6

VI

VI / BK

OR / WH

BL / WH

BR

WH

WH / BK

GY

GY / BK

(No.MA478<Rev.001>)1-17

5.1.2 For KD-R421, KD-R422

8

WH

7

WH/BK

6

GY/BK

GY

5

NC

4

BL/WH

3

GN

GN/BK

VI/BK

VI

LB/YL

BR

10

11

12

13

14

White

WH

Black

BK

GY

BL

RD

Gray

Blue

Red

9

GN

VI

LB

YL

BR

OR

Green

Violet

Light Blue

Yellow

Brown
Orange

2

16

1

14

15

3

9

10

12

11

8

7

5

6

13

2

1

RD 1

YL 1

BK

BR

OR / WH

BL / WH

GN

GN / BK

VI

VI / BK

WH

WH / BK

GY

GY / BK

LB / YL

RD1

BK

OR/WH

YL1

15

16

1

VI

3

GY

5

WH

7

GN

2

4

6

8

VI/BK

GY/BK

WH/BK

GN/BK

RD 3

9

NC

10

11

13

BL/WH

RD2

15 16

NC

12

14

BR

YL2

OR/WH

BK

RD 2

15

YL 2

12

16

10

14

13

7

8

1

2

5

6

3

4

1-18 (No.MA478<Rev.001>)

5.1.3 For KD-R424, KD-R425, KD-R426, KD-R428

1

16

2

9

10

12

11

8

7

6

5

3

2

1

BK

YL

RD

GN

GN / BK

VI

VI / BK

WH

WH/BK

GY/BK

BL

BL/WH

RD

BK

GN

GN/BK

VI/BK

VIGY

NC

BR

OR/WH

YL

10

11

12

134

14

15

16

9

BK

RD

BL

WH

GY

Black

Red

Blue

White

Gray

GN

Green

VI

Violet

BR Brown

OrangeOR

Yellow

YL

15

4

3

14

8

7

5

6

OR / WH

BL

BL / WH

BR

WH

WH / BK

GY

GY / BK

(No.MA478<Rev.001>)1-19

5.1.4 For KD-R427, KD-R45, KD-R47, KD-R527

2

16

1

15

3

14

8

7

WH/BK

6

GY/BK

5

4

BL/WH

3

2

1

RD 1

YL 1

BK

OR / WH

BL / WH

BR

WH

GY

NC

RD1

BK

GN

GN/BK

VI/BK

VI

NC

BR

OR/WH

YL1

10

11

12

13

14

15

16

9

Black

BK

RD
BL

WH

GY

Red

Blue

White

Gray

RD 3

GN

VI

BR

OR

YL

Green

Violet
Brown

Orange

Yellow

1

3

5

7

RD 2

YL 2

NC

NC

BL/WH

RD2

7

4

8

6

5

2

BR

YL2

OR/WH

BK

2

4

6

8

9

10

12

11

8

7

5

6

GN

GN / BK

VI

VI / BK

WH

WH / BK

GY

GY / BK

7

8

1

2

5

6

3

4

VI/BK

VI

1

GY

3

WH

5

GN

7

GY/BK

WH/BK

GN/BK

2

4

6

8

1-20 (No.MA478<Rev.001>)

5.1.5 For KD-R428

1

16

2

9

10

12

11

BK

YL

RD

GN

GN / BK

VI

VI / BK

8

7

6

5

3

2

1

WH

WH/BK

GY/BK

NC

BL/WH

RD

BK

GN

GN/BK

VI/BK

VIGY

LB/YL

BR

OR/WH

YL

10

11

12

134

14

15

16

9

GN

VI
LB

YL

BR

OR

Green

Violet

Light Blue

Yellow

Brown

Orange

White

WH

BK

Black

GY

Gray

BL Blue

Red

RD

15

13

3

14

8

7

5

6

OR / WH

LB / YL

BL / WH

BR

WH

WH / BK

GY

GY / BK

(No.MA478<Rev.001>)1-21

Victor Company of Japan, Limited

Mobile Entertainment Division 2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525, Japan

(No.MA478<Rev.001>)

Printed in Japan

VSE