JVC KD-R440JW User manual

SERVICE MANUAL
COPYRIGHT © 2013 JVC KENWOOD Corporation No.MA538<Rev.003>
2013/5
CD RECEIVER
MA538<Rev.003>20135SERVICE MANUAL
KD-R440J, KD-R440JW, KD-R441E, KD-R441EN, KD-R441EU,
KD-R441EY, KD-R442E, KD-R442EN, KD-R442EY, KD-R443E,
KD-R443EN, KD-R443EY, KD-R444UI, KD-R445U, KD-R445UN,
KD-R446EU, KD-R446U, KD-R446UN, KD-R446UP, KD-R446UT,
KD-R447EE, KD-R449E, KD-R449EE, KD-R449UR, KD-R540J,
KD-R541E, KD-R541EN, KD-R541EY, KD-R547EE
COPYRIGHT © 2013 JVC KENWOOD Corporation
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)
* It uses it by some models.
Refer to the parts list.
Hook
Mounting sleeve DC cord *
DC cord * Remocon unit (RM-RK52) *
(RM-RK52xx)
(GE20316-001A) (QAM13xx-001)
(QAM1344-00x)
Hard case assy *
(GE32320-001A)
Tap screw (2x8) *
Trim plate *
(QYSDSF2008ZA)
(GE40643-001A) x2 (GE2031x-001A)
DETACHABLE PANEL
Model ModelParts number
For Erope
(RU,UK)
KD-R440J
KD-R440JW
KD-R441E
KD-R441EY
KD-R441EN
KD-R441EU
KD-R442E
KD-R442EY
KD-R442EN
KD-R443E
KD-R443EY
KD-R443EN
KD-R444UI
KD-R445U
CP-R440JD
CP-R440JD
CP-R441ED
CP-R441ED
CP-R441ED
CP-R441ED
CP-R442ED
CP-R442ED
CP-R442ED
CP-R443ED
CP-R443ED
CP-R443ED
CP-R444UID
CP-R445UD
Parts number
KD-R445UN
KD-R446EU
KD-R446U
KD-R446UN
KD-R446UP
KD-R446UT
KD-R447EE
KD-R449E
KD-R449EE
KD-R540J
KD-R541E
KD-R541EY
KD-R541EN
KD-R547EE
CP-R445UD
CP-R446UD
CP-R446UD
CP-R446UD
CP-R446UD
CP-R446UD
CP-R447EED
CP-R449EED
CP-R449EED
CP-R540JD
CP-R541ED
CP-R541ED
CP-R541ED
CP-R547EED
For US
KD-R440
KD-R541
For US
For Asia,Europe

(No.MA538<Rev.003>)2/18
SPECIFICATION
For US
• Subject to change without notice.
Audio amplifier
Power Output 20 W RMS x 4 Channels at 4 Ωand ≤1% THD+N
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 80 dBA (reference: 1 W into 4Ω)
Line-Out or Subwoofer-Out Level/Impedance 2.5 V/10 kΩload (full scale)
Output Impedance ≤600Ω
Tuner
FM Frequency Range 87.9 MHz to 107.9 MHz (200 kHz step)
87.5 MHz to 108.0 MHz (50 kHz step)
Usable Sensitivity 9.3 dBf (0.8 µV/75Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75Ω)
Alternate Channel Selectivity 65 dB (at 400 kHz)
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 40 dB
AM Frequency Range 530 kHz to 1 700 kHz (10 kHz step)
531 kHz to 1 611 kHz (9 kHz step)
Sensitivity/Selectivity 20 µV/40 dB
CD 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 Below measurable limit
USB
USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Max. 12 Mbps
Compatible Devices Mass storage class
Compatible File Systems FAT 32/16/12
Playable Audio Formats MP3/WMA
Maximum Supply Current DC 5 V 1 A
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 ×53 mm ×159 mm (7-3/16” ×2-1/8” ×6-5/16”)
Panel Size (approx.) 188 mm ×59 mm ×13 mm (7-7/16" ×2-3/8" ×9/16")
Weight (excluding accessories) 1.2 kg (2.6 lbs)

(No.MA538<Rev.003>)3/18
SPECIFICATION
For Asia
• Subject to change without notice.
Audio amplifier
Maximum Power Output 50 W per channel
Continuous Power Output (RMS) 20 W per channel into 4Ω, 40 Hz to 20 000 Hz at less than 1% total harmonic distortion
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out or Subwoofer-Out Level/Impedance 4.8 V/10 kΩload (full scale)
Output Impedance ≤600Ω
Tuner
FM Frequency Range 87.5 MHz to 108.0 MHz (50 kHz step)
Usable Sensitivity 9.3 dBf (0.8 µV/75Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75Ω)
Alternate Channel Selectivity 65 dB (at 400 kHz)
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 40 dB
AM Frequency Range MW : 531 kHz to 1 611 kHz (9 kHz step)
SW1 : 2 940 kHz to 7 735 kHz (5 kHz step)
SW2 : 9 500 kHz to 10 135 kHz/11 580 kHz to 18 135 kHz (5 kHz step)
Sensitivity/Selectivity 20 µV/40 dB
CD 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 Below measurable limit
USB
USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Max. 12 Mbps
Compatible Devices Mass storage class
Compatible File Systems FAT 32/16/12
Playable Audio Formats MP3/WMA
Maximum Supply Current DC 5 V 1 A
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 ×53 mm ×159 mm
Panel Size (approx.) 188 mm ×59 mm ×13 mm
Weight (excluding accessories) 1.2 kg

(No.MA538<Rev.003>)4/18
SPECIFICATION
For Europe
• Subject to change without notice.
Audio amplifier
Power Output 50 W per channel
Continuous Power Output (RMS) 20 W per channel into 4Ω, 40 Hz to 20 000 Hz at less than 1% total harmonic distortion
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out or Subwoofer-Out Level/Impedance For KD-R547/KD-R541/KD-R449 : 2.5 V/10 kΩload (full scale)
Output Impedance ≤600Ω
Tuner
FM Frequency Range For KD-R541/KD-R443 /KD-R442/KD-R441/KD-R449 : FM: 87.5 MHz to 108.0 MHz
For KD-R547/KD-R449 /KD-R447 : FM: 87.5 MHz to 108.0 MHz / FM-LO: 65.0 MHz to
74.0 MHz
Usable Sensitivity 9.3 dBf (0.8 µV/75Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75Ω)
Alternate Channel Selectivity 65 dB (at 400 kHz)
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 40 dB
AM Frequency Range MW : 531 kHz to 1 611 kHz
LW : 153 kHz to 279 kHz
Sensitivity/Selectivity MW : 20 µV/40 dB
LW : 50 µV/-
CD 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 Below measurable limit
USB
USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Max. 12 Mbps
Compatible Devices Mass storage class
Compatible File Systems FAT 32/16/12
Playable Audio Formats MP3/WMA
Maximum Supply Current DC 5 V 1 A
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 ×53 mm ×159 mm
Panel Size (approx.) 188 mm ×59 mm ×13 mm
Weight (excluding accessories) 1.2 kg

(No.MA538<Rev.003>)5/18
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. 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 per-
formed 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 characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice 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 charac-
teristics 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 reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna 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, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent 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, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W 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.).
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 pre-
forming 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)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE

(No.MA538<Rev.003>)6/18
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.
(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.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
SOLDER

(No.MA538<Rev.003>)7/18
1.7 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.

(No.MA538<Rev.003>)8/18
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 Identifying the CD Mechanism
This unit is equipped with one of the two CD mechanism types below.
• FLM-HC3-1D
• FLM-HC5-1D
Before sending the mechanism for repair, please check the following and refer to the corresponding materials.
SPECIFICATION
FLM-HC3-1D H31
MODEL NAME STAMP No.
FLM-HC5-1D H51
Chassis Stamp Print on Right Side of Mechanism

(No.MA538<Rev.003>)9/18
SECTION 3
DISASSEMBLY
3.1 Main body (Used model: KD-R441E)
3.1.1 Removing the Bottom chassis (See Fig.1)
(1) Disengage the 7 hooks aengaging the Bottom chassis.
(2) Slide the Bottom chassis backward to remove it.
Fig.1
3.1.2 Removing the Front chassis (See Fig.2)
(1) Disengage the 4 hooks bengaging both sides of the Front
chassis.
Fig.2
3.1.3 Removing the Electric unit (See Fig.3, 4 and 5)
(1)
Remove the 1 screw A attaching the Top chassis. (See Fig. 3)
Fig.3
(2) Remove the 2 screws Battaching both sides of the Top
chassis. (See Fig.4)
Fig.4
(3) Remove the 2 screws Cand 1 clamp attaching the Electric
unit. (See Fig.5)
Fig.5
(4) Disconnect the FFC wire connected to connector CN101 of
the CD mechanism. (See Fig.6)
Fig.6
a
a
a
b
A
B
C
C
Clamp
CN101

(No.MA538<Rev.003>)10/18
3.1.4 Removing the CD mechanism (See Fig.7)
(1) Remove the 2 screws Dattaching the CD mechanism.
Fig.7
3.1.5 Removing the Switch unit (See Fig.8)
(1) Remove the Volume knob.
(2) Remove the 4 screws Eattaching the Rear cover.
(3) Disengage the 12 hooks cengaging the Rear cover.
Fig.8
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)
Fig.1
(2) Remove the 8 wires from the Mecha control board. (See
Fig.2)
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 2 screws Aattaching the Mecha control board.
(See Fig.3)
Fig.3
D
EE
cc
c
c
SOLDER
BLACK
RED
WHITE
ORANGE
ORANGE
WHITE
YELLOW
YELLOW
CN102
A

(No.MA538<Rev.003>)11/18
3.2.2 Removing the Traverse mechanism (See Fig.4, 5)
(1) Remove the 5 springs from the traverse mechanism. (See
Fig.4)
Fig.4
(2) Remove the 3 screws Battaching the bottom frame as-
sembly. (See Fig.5)
(3) Remove the 3 dumpers from the bottom frame assembly.
(See Fig.5)
Fig.5
3.2.3 Removing the Pickup (See Fig.6, 7)
(1) Remove the 2 screws Cattaching the feed bracket assem-
bly. (See Fig.6)
Fig.6
(2) Remove the shaft from the TM base. (See Fig.7)
(3) Disengage the hook aon the pickup from the TM base.
(See Fig.7)
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)
Fig.8
B
B
CC
shaft
[ SIDE VIEW ]
HC CL. spring

(No.MA538<Rev.003>)12/18
(2) Remove the HC CL. base from the holes on the TM base.
(See Fig.9)
Fig.9
(3) Remove the 2 screws Dattaching the spindle motor. (See
Fig.10)
Fig.10
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 2 screws Eattaching the loading motor as-
sembly, and then remove the loading motor assembly in
the direction of the arrow. (See Fig.12)
Fig.12
D
E

(No.MA538<Rev.003>)13/18
SECTION 4
ADJUSTMENT
4.1 Service Test mode
4.1.1 Default status immediately after the mode activation
Operating Key: [MENU] + [] (7sec) Press and hold.
4.1.2 How to release each Test mode
• Reset
•Accoff
• Power off
• Panel Detach
4.1.3 Mode content
Syscon shall display the following information after entering this mode. The operation shown below shall be workable.
4.1.4 Common operation mode for all sources.
means Press and hold.
Display content Detail
The display is released when another operation is executed.
Operation Display content Detail
[EQ]
CD error
information display
mode
Transit to CD error information display mode
[MENU]
Syscon version
display
# = Display of destination.
J = USA
R = EUROPE
E = EASTERN-EUROPE
U = OTHERS(e.g. ASIA)
@@@ = Syscon version number
[2]
Power ON duration
display
00 - 50 are displayed in " XX ".
For less than 1 hour, the display is
indicated per 10 minutes.
00001 - 10922 are displayed in "
XXXXX ".
MAX 10922 (hours).
[1]
Disc operation
duration display
00 - 50 are displayed in " XX ".
For less than 1 hour, the display is
indicated per 10 minutes.
00001 - 10922 are displayed in "
XXXXX ".
MAX 10922 (hours).
[DISP] Disc eject number
of times
00001 - 99999 are displayed in
"XXXXX"
[DISP]
Disc eject number
of times clear
Clear Disc Eject number of times by
pressing for 2 seconds when it is
displayed.
[]
Force Power OFF
information display No force Power OFF
Force Power OFF due to Syscon-
Panel communication error.
Will not show in JK12 Models.
[]
Force Power OFF
information clear
Clear Force Power OFF information by
pressing for 2 seconds when it is
displayed.
Will not show in JK12 Models.
S R V T E S T
S Y S # @ @ @
P O N T M 0 H X X
P O N T M X X X X X
C D T M 0 H X X
C D T M X X X X X
E J C N T X X X X X
E J C N T 0 0 0 00
P O F F - --
P O F F P N L
P O F F - --

(No.MA538<Rev.003>)14/18
4.1.5 CD error information display mode
Operation Display content Detail
Move
between
[DISP]
(Forward
search)
i t e m w i t h
[] / []
CD mecha error
log display
Mecha error history 1,2,3 (latest)
# = History No. (1,2,3)
XX : kind of errors, " -- " when there is
none.
00: No Error
04: TOC read Error
05: Unknown CD
06: Heat Error
0A: Update Error
0D: Hold Error
15: Unknown Disc
99: Mecha Error
CD load error
information display
Load error switch 1,2
# = History No. (1,2)
XX: numbers of errors, " -- " when there
is none
History No. 2 is un-used
CD eject error
information display
Eject error switch 1,2,3,4
# =History No. (1,2,3,4)
XX: numbers of errors, " -- "when there
is none
History No.3 is un-used
History No.1: Eject before SW1 is on.
History No.2: Eject until SW1 and SW2
is on.
History No.3: Eject between SW2 on
and Eject end
CD time code error
count information
display (count skip)
CD-DA error count number information
CD-DA error count numbers
XX: numbers of errors and " -- " when
there is none
Can only be checked via debugger by
jap member
CD-ROM (compressed file) error count
numbers
XX: numbers of errors and " -- " when there
is none
Can only be checked via debugger by jap
member
CD time code error
count information
display (no count
update)
CD time code error count information
(count not updated) mode display
CD-DA error count numbers
XX: numbers of errors and " -- " when
there is none
CD-ROM (compressed file) error count
numbers
XX: numbers of errors and " -- " when
there is none
[EQ]
CD error
information clear
CD error information all clear Clear CD error information by pressing
for 2 seconds when it is displayed.
[EQ] Mode release CD error information display mode release Back to default status, All lights on
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
C D R O M X X
M E C H A E R 1 - -

(No.MA538<Rev.003>)15/18
4.2 Service Information Clear Mode
4.2.1 Default status immediately after the mode activation
* The receiver is connected with the DC power supply (with the power supply turned off).
Operating Key: [BACK] + [POWER] Press and hold + DC power supply turned ON
4.2.2 How to release each Test mode
• Reset
•Accoff
• Power off
• Panel Detach
4.2.3 Mode content
After entering this mode, Syscon shall clear the information stored for service and output the result to the display tube.
CD will be ejected upon process ended.
Preset Frequencies and Tagging (HD models) information shall be cleared.
The following table shows the data that is cleared.
Display content Detail
When normal end
When error end
Display blinks with 250ms interval.
D A T A C L R O K
D A T A C L R N G
Information for data clearing Detail Storage area
CD mecha information
CD mecha log display E2PROM
CD load error information display E2PROM
CD eject error information display E2PROM
CD time code error count information display (count skip) E2PROM
CD time code error count information display (no count update) E2PROM
Service information CD EJECT number of times display E2PROM
Force Power OFF information display E2PROM
DC error information DC error 1 display (wrong connection & other detection information in detecting duration) E2PROM
DC error 2 display (capacitor leakage detection number information) E2PROM
Preset information
Tuner Area Setting E2PROM
Preset Frequency E2PROM
Preset PI code E2PROM
Preset HD Station Name and Sub-Channel Number (HD models) E2PROM
Sirius XM information
(Sirius models)
SXM Preset Channel SID E2PROM
SXM Lock SID E2PROM
SXM Last Channel ID E2PROM
SXM Channel Lock Code E2PROM
Tagging information (HD models) Token data memory index E2PROM

(No.MA538<Rev.003>)16/18
4.3 DC error information mode
4.3.1 Default status immediately after the mode activation
* The receiver is connected with the DC power supply (with the power supply turned off).
Operating Key: [MENU] + [] Press and hold + DC power supply turned ON
4.3.2 How to release each Test mode
• Reset
•Accoff
• Power off
• Panel Detach
4.3.3 Mode content
Syscon shall display the following information after entering this mode. The operation shown below shall be workable.
4.3.4 Mode operation specification
means Press and hold
Display content Detail
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 leak-
age, wrong connection or other detection is found).
D C E R R
D C O K
Operation Display content Detail
[]
DC ERR1
display
When wrong connection & DC error in other de-
tection duration is detected.
When wrong connection & DC error in other de-
tection duration is not detected.
[]
DC ERR1
clear
Clear detection information when wrong con-
nection & DC error in other detection duration is
displayed.(Clear data flash)
[]DC ERR2
display
Display detecting number of times in capacitor
leakage detection duration (0 - 4)
[]
DC ERR2
clear
Clear number of times for detection information
in capacitor leakage detection duration.(Clear
data flash)
D C 1 E R R
D C 1 O K
D C 1 O K
D C 2 4
D C 2 0

(No.MA538<Rev.003>)17/18
4.4 DC offset error description
4.4.1 DC offset detection circuit design
•Purpose:
To prevent breakdown, burning and emitting smoke from cus-
tomer's car speaker when occur DC offset between speaker
output "+" and "-".
• Target:
Detect DC offset, then stop the Power Amp operation and shift
to specified condition.
4.4.2 Possible causes of DC offset at speaker output lines
(1) Mis-connection for speaker output for example touch to car
body or battery line.
(2) Current leak of coupling capacitor for Power IC input.
(3) Current leak of Ac-GND capacitor for Power IC Ac-GND.
(4) Capacitor shorted of above parts due to foreign object.
4.4.3 Type of checking
4.4.3.1 To detect DC offset Error
• Mis-connection
- Short any one speaker out line to GND or Vcc
• Capacitor leak
- Parallel 330kΩto either any one of coupling cap or Ac-GND
cap (to simulate current leakage of capacitor)
- Shorted either any one of coupling cap or Ac-GND cap.
4.4.4 Detection Timing chart
4.4.5 Manipulate after detect DC offset
• If detected error 10 consecutive times, and 10th error occurred
in "Mis-connect detection period", judge as "Mis-connect".
• If detected error 10 consecutive times, and 10th error occurred
in "Capacitor leak detection period", judge as "Capacitor leak ".
• If detected error 10 consecutive times, and 10th error occurred
in "Other detection period" and detected another 10 errors con-
secutively, then judge as "Other".
• If judge as "Mis-connect".
- turn off speaker output.
- display "MIS WIRING" →"CHK WIRING" →"THEN RESET"
→"UNIT".
- key access disable except button of Eject, Reset and service
mode
- record error in EEPROM "DC1 ERR"
- Set is able to be recovered by Reset button.
• If judge as "Capacitor leak ".
- turn off speaker output.
- display "WARNING" →"CHK WIRING" →"THEN RESET"
→"UNIT".
- key access disable except button of Eject, Reset and service
mode
- record error in EEPROM "DC2 #" (# means counter number)
- Set can be recovered by pressing the Reset button before
the capacitor leak error counter reach "DC2 4".
After that, only clear the counter back to "0" can recover the
set.
• If judge as "Other" (manipulation same as mis-connect)
SECTION 5
TROUBLESHOOTING
5.1 How to cancel DC offset error
Check to be sure the terminals of the speaker leads are covered
with insulating tape properly, then reset the unit.
If an error message does not disappear even after a reset, there
is a need for internal repair.
5.2 How to clear DC offset error recorded in EEPROM
DC Error Information Mode is started.
[MENU] + [] Press and hold + DC power supply turned ON
DC1 ERR →[] Press and hold.→DC1 OK
DC2 1-4 →[] Press and hold.→DC2 0
E-Vol Audio Pwr Amp
Micon
In 1
In 2
In 3
In 4
AcGnd
Offset Detect
Out
ADC In
R4
C3
R3
R1
R2
Sw5V
C-ac2C-ac1
C-tc
Win_TC
Win_In
DC Error
C-in
C-in
C-in
C-in
PWIC_STBY
PWIC_MUTE
A
UD_MUTE
1.5sec or more
0.7sec or more
1.0sec
50ms
or more
Missconnect
detection period
Capacitor leak
detection period
Other (miss detection etc.)
detection period
2.0sec or more
0.8sec

(No.MA538<Rev.003>)
VSE
Printed in Japan
JVC KENWOOD Corporation
Car Electronics Business Group 2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525, Japan

SCHEMATIC DIAGRAMS
CD RECEIVER
KD-R440J KD-R440JW KD-R441E
KD-R441EN KD-R441EU KD-R441EY
KD-R442E KD-R442EN KD-R442EY
KD-R443E KD-R443EN KD-R443EY
KD-R444UI KD-R445U KD-R445UN
KD-R446EU KD-R446U KD-R446UN
KD-R446UP KD-R446UT KD-R447EE
KD-R449E KD-R449EE KD-R449UR
KD-R540J KD-R541E KD-R541EN
KD-R541EY KD-R547EE
(No.MA538<Rev.003>)1/
19

■PRECAUTIONS ON SCHEMATIC DIAGRAMS
zDue to the improvement in performance, some part numbers shown in the circuit diagrams
may not agree with those indicated in the Parts List.
zThe parts numbers, values and rated voltage etc. in the Schematic Diagrams are for
reference only.
zSince the circuit diagrams are standard ones, the circuits and circuit constants may be
subject to change for improvement without any notice.
■PRECAUTIONS ON PARTS LIST
zThe parts identified by the symbol are critical for safety. Whenever replacing these parts, be sure to
use specified ones to secure the safety.
zThe parts not indicated in this Parts List and those which are filled with lines --- in the Parts No.
columns will not be supplied.
zP.W. BOARD Ass'y will not be supplied, but those which are filled with the Parts No. in the Parts No.
columns will be supplied.
zWhen ordering chips, screws etc., place bulk orders (unit of tens) whenever possible to improve
shipping efficiency.
zThere are cases where the actual implemented parts in the sets and the service parts are different.
When ordering parts, make sure to refer to the Parts List.
■PRECAUTIONS ON SERVICE
Certain parts of the power circuits and the GNDs differ according to the models. Care must be
taken for the following points as the differences are indicated separately in the LIVE GND ( ) and
the ISOLATED (NEUTRAL) GND ( ).
1. Do not touch the LIVE GND, or do not touch the LIVE GND and the ISOLATED (NEUTRAL)
GND at the same time. It may cause an electric shock.
Before pulling out the chassis or other parts, make sure to pull out the power cord from the
wall outlet first.
2. Do not short circuit between the LIVE GND and ISOLATED (NEUTRAL) GND, or never
measure the LIVE GND and ISOLATED (NEUTRAL) GND at the same time using measuring
instruments (oscilloscope, etc.). It may blow fuses or damage other parts.
■DEVIATION TOLERANCE RANGE󲩷
DEVIATION TOLERANCE RANGE
F G J K M N R H Z P
±1% ± 2% ±5% ±10% ±20% ±30% +30%
-10%
+50%
-10%
+80%
-20%
+100%
-0%
(No.MA538<Rev.003>)2/
19