Kenwood KDC-W4031 User manual

© 2004-12 PRINTED IN JAPAN
B53-0230-00 (N)1813
CD RECEIVER
KDC-W4031/Y
KDC-W409/Y
KDC-W431GY
KDC-W4531/Y
KDC-WF431A
SERVICE MANUAL
* Depends on the model. Refer to the parts list.
PANEL ASSY
KDC-W4031/Y (A64-3455-02) PANEL ASSY
KDC-W409/Y (A64-3456-02)
ANTENNA ADAPTOR
(T90-0523-05)
SPARE TDF PANEL
MAIN UNIT NAME TDF PARTS No. TDF NAME
KDC-W4031/Y Y33-2140-60 TDF-W4531
KDC-W409/Y Y33-2140-65 TDF-W409
KDC-W431GY Y33-2140-61 TDF-W431GY
KDC-W4531/Y Y33-2140-60 TDF-W4531
KDC-WF431A Y33-2140-63 TDF-WF431
MENU
/ PTY
VOL
AUD
FF
SET UP
SCAN RDM REP F.SEL
MENU
VOL
AUD
FF
SET UP
SCAN RDM REP F.SEL
/ PTY
MENU
VOL
AUD
FF
SET UP
SCAN RDM REP F.SEL
VOL
AUD
FF
SET UP
MENU
SCAN RDM REP F.SEL M.RDM
External Media Control
/ PTY
/ PIY
MENU
VOL
AUD
FF
SET UP
SCAN RDM REP F.SEL
PANEL ASSY
KDC-W431GY (A64-3457-02) PANEL ASSY
KDC-W4531/Y (A64-3454-02)
PANEL ASSY
KDC-WF431A (A64-3466-02)
MOUNTING HARDWARE ASSY
(J21-9716-03)
PLASTIC CABINET ASSY
(A02-2736-03)
DC CORD
(E30-6413-05)
LEVER
(D10-4589-04) x2
* ESCUTCHEON
(B07-xxxx-xx)
This product uses Lead Free solder.

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KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
BLOCK DIAGRAM
MECHA
CD or MD
CHANGER
J2
E-VOL
IC10
&
AM AGC
Q501
FM AGC
L506
J4
TUNER
IC11
E2PROM
SYSTEM u-COM
IC1
IC7
RDS
DECODER
RST IC
IC8
PRE MUTE
Q351,352
IC4
POWER IC
MUTE LOGIC
IC6
SURGE DET
BU DET
ACC DET
Q51
Q52
Q53
J1
PAN5V
Q151
Q72,73
SERVO
VFD REG
IC15
POWER SUPPLY IC
IC3
ED1
VFD
with
VFD DRIVER
IC1 REMOTE
IC3
VOL
S11 KEY MATRIX
DSIQ155
.......
.......
J6
SERVO
A8V
BU5V
AUDIO OUT
AM+B
ANT
MPX OUT
MPX IN
800mV
1200mV
AUDIO OUT
BU5V
A8V
BACK-UP
SP OUT
BACK-UP
ACC
TEL MUTE
P-ANT
P-CON
PAN5
SERVO P-ANT SW5V
AM+B
A8V
BU5V
P-CON
SW5V
AM+B
AUDIO+B
VCC
ILLUMI
BU5V
ILLUMI
PAN5V BU5V
PRE OUT
KEY
:CHANGER
CD/MD RECEIVER
FM (E Type)
FM (J/K Type)
AM (J/K Type)
AM (E Type) : :
:
:
: 1800mV
1372mV
600mV
855mV
3600mV
3600mV
ELECTRIC UNIT (X34-)
SWITCH UNIT (X16-)
S7V
A8V
BU5V
D5V
A3.3V
SW3.3V
BU3.3V
BU2.5V
CD PLAYER UNIT (X32-5500-00)
IC1
MECHANISM
CONTROL
Q8
APC
Q9,10
SW
IC4
4ch BTL
DRIVER
M
M
DM1
DM2
SPINDLE
MOTOR
LOADING
MOTOR
& SLED
S1
S2
IC9
DAC 3.3V
AVR
Q3,5,6
S3 LEVEL SHIFT
Q7
Q1,4
LEVEL
SHIFT
MICROPROCESSOR
AVR
BU 3.3V
IC6 DAC 3.3V
AVR
IC7
SW 3.3V
AVR
IC5
LEVEL
SHIFT
IC3
MP3/WMA
DECODER
IC2
PROCESSOR
RF AMP/SERVO
CD SIGNAL
BUFFER
IC8
FO COIL
TR COIL
(OPTICAL PICKUP)
AC
F
B
E
DPU1
LD
PD
CN2
CN1
15
14
13
12
DGND
DATA
CLK
MUTER
MUTEL
MSTOP
MRST
10
LOS
20
19
18
17
16
1
A8V
L
AGND
DOUT
R
MOTOR
LO/EJ 5
4
3
2
9
8
7
6
SGND
S7V
12EJE
LOE/LIM
X2
16.00MHz
16.898MHz
X1
OPEN
D5
DGND
D5
24
23
22
21
BU5
3
3
8
1
2
4
4
4
4
VREF
SLD
TRK
FCS
SPD
516
PON

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KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
COMPONENTS DESCRIPTION
●ELECTRIC UNIT (X34-3402-7x)
Ref. No. Application / Function Operation / Condition
IC1 SYSTEM µ-COM System control.
IC3 POWER SUPPLY DC5Vx2, 7.9Vx1, 8.1Vx1, 10.3V, P.CON, P-ANT output.
IC4 POWER IC Audio signal amplifier.
IC6 MUTE LOGIC Mute control.
IC7 RDS DECODER RDS decode.
IC8 RESET “L” when detection voltage goes below 3.6V.
IC10 E-VOL & TUNER E-VOL, Tuner, Stereo decode.
IC11 E2PROM Saves and writes tuner adjustment data.
IC15 VFD REGULATOR 11.3V output voltage for LED and VFD.
Q51 SERGE DET “ON” when the base goes “H”.
Q52 BU DET “ON” when the base goes “H”.
Q53 ACC DET “ON” when the base goes “H”.
Q71 SERVO+B CONTROL SW “ON” when the base goes “H”.
Q72,73 SERVO+B AVR Output voltage level : 7.5V.
Q74 IC3 CONTROL SW “ON” when the base goes “H”(Output voltage :10.3V).
Q151 PANEL 5V SW “ON” when the base goes “L”.
Q155 DSI ILLUMI SW “ON” when the base goes “L”.
Q252 IC4 STBY SW “ON” when the base goes “L”.
Q330 Q351, 352 MUTE DRIVER “ON” when the base goes “L”.
Q351 Lch PRE MUTE SW Pre-output is muted when the base goes “H”.
Q352 Rch PRE MUTE SW Pre-output is muted when the base goes “H”.
Q501 AM RF AMP Adjusts for AM-RF gain.
●CD PLAYER UNIT (X32-5500-00)
Ref. No. Application / Function Operation / Condition
Focusing, tracking, sled and spindle servo processing.
IC1 MECHANISM CONTROL Automatic adjustment (Focusing, tracking, gain, offset and balance) operations.
MICROPROCESSOR Digital signal processing (DSP, PLL, sub-codes, CIRC error correction, audio data
interpolation) operations, and microcomputer function.
Generation of RF signal based on the signals from the APC circuit and pickup, and
IC2 RF AMP/SERVO CD generation of servo error (Focusing error and tracking error) signals.
SIGNAL PROCESSOR Detection of dropout, anti-shock, track crossing and off-track conditions, included
gain control function during CD-RW.
IC3 MP3/WMA DECODER
IC4 4ch BTL DRIVER Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and
eject operation.
IC5 SW 3.3V AVR
IC6 BU 3.3V AVR 3.3V power supply for back-up.
IC7 BU 2.5V AVR 2.5V power supply for back-up.

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KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
Ref. No. Application / Function Operation / Condition
IC8 SELECTOR (SERIAL DATA) Serial audio data switch.
IC9 DAC 3.3V AVR 3.3V power supply for IC2.
Q1 LEVEL SHIFT 3.3V to 5.0V.
Q3~7 LEVEL SHIFT 3.3V to 5.0V.
Q8 AUTOMATIC POWER CONTROL LD driver.
Q9,10 SWITCH Switch for anticipation sub-beam delay.
●SWITCH UNIT (X16-2932-7x)
Ref. No. Application / Function Operation / Condition
IC1 VFD DRIVER
IC3 REMOTE SENSOR
Q1 GREEN LED SW “ON”when the base goes “H”.
Q2 RED LED SW “ON” when the base goes “H”.
Q21 PAN SW5V “ON” when the base goes “H”.
COMPONENTS DESCRIPTION
MICROCOMPUTER’STERMINAL DESCRIPTION
●SYSTEM µ-COM : IC1 on X34- (ELECTRIC UNIT)
Pin No. Active Pin Name I/O Application Processing Operation
(H/L)
1 DC ERR I DC offset detection input
2LINE MUTE I Phone detection NAVI MUTE : Over 2.5V, TEL MUTE : Below 1V
3ROTARY CW I Rotary encoder input
4AVSS -
5TUN TYPE1 I E-VOL setting switch Refer to “TUN TYPE” on the TRUTH TABLE
6TUN TYPE2 I E-VOL setting switch Refer to “TUN TYPE” on the TRUTH TABLE
7AVREF1 -
8VFD DATAF I Data input from VFD driver
9 VFD DATAS O Data output to VFD driver
10 VFD CLK O Clock output toVFD driver

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KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
MICROCOMPUTER’STERMINAL DESCRIPTION
Pin No. Active Pin Name I/O Application Processing Operation
(H/L)
11 L VFD RST O Reset output to VFD driver Display OFF, Key reset, TDF panel OFF : L
Display ON, Key scan :H
12 VFD CE O Chip enable output toVFD driver
13 ROTARY CCW I Rotary encoder input
14 L TDF DET I TDF panel detection TDF panel OFF : H,TDF panel ON : L
15 PWIC BEEP O Beep output
16 LX DATA S I Data from slave unit
17 LX DATA M O Data to slave unit
18 LX CLK I/O LX-BUS clock
19 RDS AFSL O Tuner RDS mute output Refer to “RDS AFSL” on the TRUTH TABLE
20 L TUN ADJ I For adjusting IC10 Adjustment=H, PS1-1,2=L, PS1-3=Hi-Z,
PS2-1,2=Hi-Z, TUN DATA, CLK=Hi-Z
21 TUN SD I Tuner search stop output H : Station exists, L : Station does not exist
22 H LX RST O Hard reset to slave unit H : Reset, L : Normal condition
23 H LX CON O Start-up request to slave unit H : Slave unit ON, L : Slave unit OFF
24 LX REQ M O Communication request to slave unit
25 AUD SDA I/O Volume + tuner I2C data input and output
26 AUD SCL I/O Volume + tuner I2C clock input and output
27 H PWIC STBY O Power IC standby output Power IC ON : H, Power IC OFF : L
28 H VOL MUTE O E-VOL mute output L : Mute OFF, Hi-Z : Mute ON
29 L PWIC MUTE O Power IC mute output Power OFF : L, Standby : L,Tel mute :L
30 TUN FANC OUT O Tuner block (inside the µ-com) check OK : L, NG : H
31 RESET2 O Mute for reset Output L
32 RDS DATA I RDS decoder data input
33 VSS1 -
34 RDS QUAL I RDS decoder QUAL input
35 L ACC DET I ACC detection ACC exists : L, ACC does not exist :H
36 L BU DET I Momentary power-down detection BU exists : L
BU does not exist (Momentary power-down) : H
37 NC -
38 PS2-2 O Power supply control output Refer to “POWER IC CONTROL” on the TRUTH TABLE
39 PS2-1 O Power supply control output Refer to “POWER IC CONTROL” on the TRUTH TABLE
40 PS1-1 O Power supply control output Refer to “POWER IC CONTROL” on the TRUTH TABLE
41 PS1-2 O Power supply control output Refer to “POWER IC CONTROL” on the TRUTH TABLE
42 PS1-3 O Power supply control output Refer to “POWER IC CONTROL” on the TRUTH TABLE
43,44 NC -
45 CD MUTE I CD mute request L : Mute request
46 L CD MSTOP O CD mecha u-com stop H : mecha µ-com operates, L :mecha µ-com is stopped
47 CD LOE LIM SW I CD detection (chucking switch) H : Loading is finished, L : Disc does not exist

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KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
Pin No. Active Pin Name I/O Application Processing Operation
(H/L)
48 CD LOEJ I/O CD motor control Refer to “CD MECHA CONTROL OPERATION”
on the TRUTH TABLE
49 CD MOTOR O CD motor control Refer to “CD MECHA CONTROL OPERATION”
on the TRUTH TABLE
50 NC -
51 L CD MRST O CD mecha µ-com reset H : Normal condition, L : Reset
52 CD SCL I/O CD mecha I2C clock output
53 CD DISC12 SW I 12cm CD detection
54 CD LOS SW I CD loading detection
55 CD SDA I/O CD mecha I2C data input and output
56 OEM DISP CE I/O External display chip enable External display
57 OEM DISP CLK I/O External display clock External display
58 OEM DISP DATA I/O External display chip data External display
59 DSI O DSI control DSI ON : H, DSI OFF : L, TDF DET=H (DSI blinks)
60 L RESET I
61 NC -
62 L PON FL O VFD power supply ON VFD ON : H,VFD OFF : L
TDF DET H (DSI blinks) : L, TDF DET L : H
63 KEY REQ I Communication request fromVFD driver L : Key input
64 RDS CLK I RDS decoder clock input
65 REMOTE I Remote control input
66 LX REQ S I Communication request from slave unit
67 VSS0 -
68 VDD1 -
69 X2 -
70 X1 -
71 TEST -
72 XT2 -
73 XT1 -
74 VDD0 -
75 AVDD -
76~78 TYPE 3~TYPE 1 I Destination switch
79 RDS NOISE I Tuner quality (Noise) input
80 TUN SMETER I Tuner S-meter input
MICROCOMPUTER’STERMINAL DESCRIPTION

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KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
MICROCOMPUTER’STERMINAL DESCRIPTION
●TRUTHTABLE
•TUNTYPE
TYPE 1 TYPE 2
General models commercially-designated as pure KENWOOD brand (Initial value) LL
Initial value setting
• RDS AFSL (AF search)
High Normal condition communication (IC10 side : High)
(Quality time constant long / Stereo Decoder PLL : Not hold)
Low AF search (IC10 side : Middle)
(Quality time constant short / Stereo Decoder PLL : Hold)
• POWER SUPPLY IC (IC3) CONTROL
SEL1 (Pin No. 11)
PS1-2 PS1-3 PS2-1 ILLUMI P-CON P-ANT
LLLOFF OFF OFF
LLHONOFF OFF
HLHONONOFF
HHHONONON
SEL2 (Pin No. 12)
PS1-1 PS2-2 AUDIO SW5 AM
LLOFF OFF OFF
HLONON OFF
HHONON ON
• CD MECHA CONTROL OPERATION
CD LOEJ CD MOTOR CD MECHA OPERATION
LH Load
HH Eject
Hi-Z L Stop
Hi-Z H Brake

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KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
●CD MECHANISM µ-COM : IC1 on X32- (CD PLAYER UNIT)
Pin No. Active Pin Name I/O Application Processing Operation
(H/L)
1VREFL - Reference power supply input terminal for ADC (L). GND
2AVSS - GND terminal for ADC. GND
3AVCC - Power supply terminal for ADC. Back-up 3.3V
4NC-
5L20RST O Reset control (Decoder). L : Reset, H :Normal condition
620ACK I Acknowledge signal input (Decoder).
7 20STBY O Standby control (Decoder). H : Standby, L : Normal condition
8,9 NC -
10 20INT I Interrupt signal input (Decoder).
11 FOGUP I Focus gain-up interrupt. H : Focus gain-up, L :Normal condition
12 LZM I 0 bit mute detection (Lch). L : MUTE OFF, H : MUTE ON
13 RZM I 0 bit mute detection (Rch). L : MUTE OFF, H : MUTE ON
14,15 NC -
16 L 20CS O Chip select signal output (Decoder).
17 L 20LP O Latch pulse signal output (Decoder).
18 20TXD0 I/O Data output for serial data (Decoder). Input condition is kept except in output condition.
19 20RXD0 I Data input for serial data (Decoder).
20 20SCLK0 O Clock output for serial data (Decoder).
21 DSPTXD1 O Data output for serial data (DSP).
22 DSPRXD1 I Data input for serial data (DSP).
23 DSPSCLK1 O Clock output for serial data (DSP).
24 AM0 - ROM mode selection terminal. H : Normal condition, L : External ROM mode
25 DVCC - Back-up 3.3V.
26 X2 O Resonator terminal. 16MHz
27 DVSS - GND.
28 X1 I Resonator terminal. 16MHz
29 AM1 I “H” condition is fixed. Back-up 3.3V
30 L RESET I Reset detection. L : Reset, H :Normal condition
31~34 NC -
35 L DSPSTB O Data strobe signal output (DSP).
36 DSPA0 O Command/Parameter identification signal output H : Parameter data output,
(DSP). L : Command data output
37 L DSPRST O Reset control (DSP).
38 DSPINT I Interrupt signal input (DSP). H : Interrupt
39 NC -
40 SEARCH O Search condition output. H : Search, L : Normal condition
41 LOE/LIM SW I Loading-end detection/Pick-up inner circumference detection H : Inner circumference
42~49 NC -
MICROCOMPUTER’STERMINAL DESCRIPTION

9
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
Pin No. Active Pin Name I/O Application Processing Operation
(H/L)
50 FLAGIN I C2Err impossibility detection. L : Correction is possible.
H : Correction is impossible.
51~61 NC -
62 DVSS - GND.
63 L NMI I Non-maskable interrupt request.
64 DVCC - Power supply terminal.
65~77 NC -
78 NC/BOOT I Mask : Not connected. Flash : For writing (Active “L”). L :Write, H : Nomal condition
79,80 NC -
81 POND3.3 O Digital 3.3V power-on control terminal. H : POWER ON
82 L MUTEL O Lch audio mute control.
83 L MUTER O Rch audio mute control.
84 SDA I/O I2C data (Main µ-com).
85 SCL I/O I2C clock (Main µ-com).
86 L MSTOP I Stand-by comeback interrupt. L : Stop, H : Stop is released.
87 NC -
88 L DMUTE O Driver mute. L : MUTE ON, H : MUTE OFF
89 DVCC - Power supply terminal.
90 NC -
91 DVSS - GND.
92,93 NC - GND.
94 MSEL I Memory capacity switching terminal. H : Capacity size down, L : Capacity size up
95 NC - GND.
96 ASEL I Audio output polarity switch. H : Reverse output, L : Non-reverse output
97 CHSEL I Changer destination terminal. H :Changer, L : Other source
98 SEL0 I µ-com destination terminal 0.
99 SEL1 I µ-com destination terminal 1.
100 VREFH I Reference power supply input terminal for ADC (H). Back-up 3.3V
MICROCOMPUTER’STERMINAL DESCRIPTION

10
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
TEST MODE
How to enter the test mode
While simultaneously press PRESET “1”key and PRESET “3”
key, press “RESET” button.
How to release the test mode
Press “RESET” button. (The release cannot be achieved in
the conditions of POWER OFF and ACC OFF.)
Initial conditions of the test mode
• The source is “STANDBY”.
• The displays all lit up.
• The volume is at –10dB (The display shows “30”.)
• LOUD is “OFF”.
• CRSC is “OFF”.
• SYSTEM Q is “NATURAL”.
• BEEP is sounded at all time with the key depressed for less
than 1 second.
Special displays when all indicator lights are lighted
When “PRESET”keys are pressed while all indicators for the
STANDBY sources are lighted, the following displays will ap-
pear.
PRESET •Version display (8 digits : month, date, hour, minute)
“1” key (Display) :x x x x x x x x
PRESET •Serial number display (8 digits)
“2” key (Display) :x x x x x x x x
PRESET •When pressed for less than 1 second : POWER ON
“3” key time display (STANDBY source time is not counted.)
(Display) : PON x x x x x MAX 60,000 (hours)
*The display is cleared by pressing the key for more
than 2 seconds.
PRESET • When pressed for less than 1 second : CD operation
“4” key time display
(Display) : PLY x x x x x MAX 60,000 (hours)
*The display is cleared by pressing the key for more
than 2 seconds.
PRESET •When pressed for less than 1 second :CD EJECT
“5” key number display
(Display) : EJC x x x x x MAX 60,000 (times)
*The display is cleared by pressing the key for more
than 2 seconds.
PRESET • When pressed for less than 1 second : Panel open/
“6” key close number display
(Display) : PNL x x x x x MAX 600,000 (times)
*The display is cleared by pressing the key for more
than 2 seconds.
“FM” • ROM CORRECTION version display
key (Display)
Effective : ROM _ Rxxx (x :number)
Not effective (When not able to read) : ROM _ R – – –
Not effective (When version is different) : ROM _ R✳✳✳
“AM” • IC10 adjustment status (Refer to“ADJUSTMENT” on
key the following page.)
(Display)
Adjustment complete : E2P _ OK _ _
Adjustment not completed : E2P _ ER _ _
Communication error : I2C _ ER _ _
*When other than “E2P _ OK _ _” , Pin No. 30 will
become “H”.
“”•Mechanism error detection status
key•Communication error →Error No. 1 →Error No. 2 →
Error No. 3 →Communication error (Error No. 1 is the
most recent error.)
(Display)
Communication OK : I2C _ OK _ _
Communication error : I2C _ NG _ _
Not detected : ERR _ n – – – (n : 1~3)
Detected : ERR _ n-✳✳ (✳✳ : error code)
*The display is cleared by pressing the key for more
than 2 seconds.

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KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
SPECIAL MODE
●Security (KDC-W4531/W4531Y only)
• How to enter the forced POWER ON mode
While “– – – –” is being displayed, while simultaneously
pressing “Q” key and “4” key, press “RESET” button, With
this, it is possible to turn the power on for 30 minutes only.
•How to register the security code on the “Car
Audio Passport” sheet after replacing E2PROM
(IC11)
1. Enter the test mode.(Refer to “How to enter the test mode”.)
2. In the test mode, press “MENU” key to enter the MENU
mode.
When “SECURITY” is displayed, press “ ” key (for less
than 1 second) to enter the security registration mode.
3. Input the security code, using “FM” / “AM” / “ ” / “ ”
keys.
“FM” key :number up / “AM” key : number down
“” key : cursor to right / “ ” key : cursor to left
4. After inputting the code, press “ ” key for 3 seconds or
more which causes “RE-ENTER” to be displayed. This is
for “confirming” the code.Use the method in above No.“3”
to re-enter the code.
5. Then, press “ ” key for 3 seconds or more, which will dis-
play “APPROVED”.This completes the security code regis-
tration.
6. Release the test mode. (Refer to “How to release the test
mode” .)
* All clear cannot be used to clear the security code.
●DC offset error detection confirmation mode
Confirmation mode :
While depressing PRESET “3” key and PRESET “6” key
simultaneously, press on the “RESET” button.
(Display) Detected : DC _ ERR _ _
Not detected : DC _ OK _ _ _
* By pressing “TI” or “AUTO” key while “DC _ ERR _ _” is
being displayed, detection status is cleared. This will result
in the display of “DC _ OK _ _ _”.
Release Method : Press “RESET”button.
●Mechanism memory clear confirmation mode
Confirmation mode :
While depressing “ATT” key and “Q” key simultaneously,
press “RESET” button.
(Display) : MEM _ CLR _
*2seconds after the confirmation mode boots up, Mecha-
nism memory clear as a result is displayed.
(Display) Clear status display normal completion
: CD _ O _ _ _
Clear status display abnormal completion
: CD _ X _ _ _
Release Method : Press “RESET”button.

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KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
ADJUSTMENT
After replacing the following parts, adjust as follows.
REPLACED PARTS ADJUSTMENT ITEMS
Ref. No. Function / Parts name 1st AM MIX 2nd AM MIX FM antenna
IC10 E-VOL & TUNER YES YES YES
IC11 E2PROM YES YES YES
L507 VCO COIL YES YES YES
L508 1st AM MIX IFT YES - -
L509 2nd AM MIX IFT - YES -
L518 FM ANTENNA COIL - - YES
D504 VARIABLE YES YES YES
CAPACITANCE DIODE
D506 VARIABLE YES YES YES
CAPACITANCE DIODE
X501 CRYSTAL RESONATOR YES YES YES
●1st AM MIX / 2nd AM MIX ADJUSTMENT
ADJUSTMENT POINT : L508 (1st AM MIX) / L509 (2nd AM
MIX)
VOLTAGE VALUE CHECK POINT : S-METER check land (X34-)
Adjust so that S-METER voltage value becomes maximum.
• SG setting
DESTINATION FREQUENCY MODULATION ANTENNA INPUT
Europe 999kHz OFF 35dBµV (EMF)
Except Europe 1000kHz OFF 35dBµV (EMF)
●FM ANTENNA ADJUSTMENT
ADJUSTMENT POINT : L518
VOLTAGE VALUE CHECK POINT : S-METER check land (X34-)
Adjust so that S-METER voltage value becomes maximum.
• SG setting
DESTINATION FREQUENCY MODULATION ANTENNA INPUT
Europe 87.5MHz OFF 5dBµV (LOAD) or
11dBµV (EMF)
Except Europe 87.9MHz OFF 5dBµV (LOAD) or
11dBµV (EMF)

13
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
EDCBA
1
2
3
4
5
6
7
PC BOARD
(COMPONENT SIDEVIEW) (FOIL SIDE VIEW)
C63
C64
VO
VCC
G
EJECT
AUTO
RESET
6
6171
1866
5321SRCQ
VOL
AUD
ATT 4
D31
D32
D64
D33
D34
D35
D36
D37
D38
D39
D40
D41
D42
D43
D44
D45
D46
D47
D48
D49
D50
D51
D52
D53
D54
D61
D62
D65
D70
ED1
S12
S11
IC3
SWITCH UNIT X16-2932-7x (J76-0055-02) SWITCH UNIT X16-2932-7x (J76-0055-02)
W11
W13
W14
W12
C11
C12
C10
C15
C21
C61
CP11
R70
R1 R2
R11
R13
R14
R15
R16
R17
R18
R19
R21
R22
R31
R32
R33
R34
R62
R63
R71
R72
R74
R75 R77
R82
W1
W2
R23
R78
R61
R80
RTRY-CW
RST
KS3
ESD-GND
CLK
REMO
TDF-DET
RTRY-CCW
DATAS
ILL-D-GND
2
14
KS1
KI4
KI1
KI2
KI3
LED+B
DATAF CE
KS4
PAN5V
FL-SW9.8V
KS2
PAN-SW5V
FL+B
VFD-RST
KI5
1
80
61
60
41 40 21 20
1
15
EBEB
EB
C65
D96
D71
D72
D73
D74
D75
D76
D77
J1
Q1
Q2
Q21
IC1
X16-2932-7x
Ref. No. Address
IC3 2B
X16-2932-7x
Ref.No. Address
IC1 4D
Q1 3D
Q2 3D
Q21 5D
Refer to the schematic dia-
gram for the values of resis-
tors and capacitors.

14
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
FGHIJ
1
2
3
4
5
6
7
PC BOARD (FOIL SIDEVIEW)
J1/L51
BU+5V
LXCLK
LXDATAM
LXDATAS
DATA
CLK
R312
W322
W355
W345
L61
L3
C409
C51
C71
C78
C79 C80
C97
C117
C255
C256
C258
W340
W398
R72
R73
W337
W365
W251
X1
C1
C2
C6
C3
C5
C4
C257
W403
L51
W425
R21 R58
W388
W426
R59
W334
W330
W324
W320
W408
W378
W332
W376
W315
W402
W317
X2
X3
W419
W423
BE
W424
W351
W418
W352
W405
W406
W416
W385
W390
W377
W379
W381
W362
W357
W387
W383
W375
W393
W391
W427
W312
W335
W413
W414
W409
W415
W417
W404
W421
W422
C119
R363
L101
W395
W410
W407
W412
W401
W397
W396
W389
W374
W354
W373
W358
W318
W327
W336
W314
W353
W313
W399
R81
W380
W392
W382
W386
W349
W316
W321
W346
W331
W333
W363
W366
W319
W347
W350
W342
W359
W338
W371
W341
W360
W326
W394
W372
W420
BE
W370
W356
W329
W343
W344
W368/
W384
W323
W325
W328
W369
W364
W361
W339
W348
C201
R57
R61
R85
R364
R365C154
R366 C52
C410
R412
R414
R416
R419
R420
R441
R453
R454
C53
C69 C72
C73
C74
C75
C76
C77
C81
C82
C112
C113
C407
C408
C411
C420
C565
R130
R52
R53
R56
R82
R190
R191
R193
R194
R252
R254
R257
R367
R411
R413
R415
R417
R418
R440
L301
R456
R471
W70
C54
C55
C116
W58
W81
R51
R54
R55
R60
R75
R76
R77
R78
R83
R86
R87
R88
R89 R90
R96
R112
R113
C118
R178
R180
R181
R182
R200
R251
R255
R256
R271
R272
R273
R303
R351
R352
R353
R355
R356
R357
R358
R359
R360
R368
R369
R370
R371
R431
R432
R433
R435
R436
R437
R438
R439
R450
R451
R452
R457
R470
TH1
R131
W69
W252
W71
W67
W98
W61
C152
W59
W60
R114
R199
R372
W63
W57
W66
W62
W65
W64
W73
R480
W53
W51
226
81
1
51
51
12
12
224
123
16 9
127
R253
W72
W96
W97
W78
W91
W83 W82
R313 W80
W79
R135
W68
W99
R133
R136
R137
R138
R140
R139
R141
R100
C153
R151
C422
W102
W52
RST
SCL
TEST
BU5V
AFS
ADJ
DATA
OEM-DATA
OEM-CE
OEM-CLK
5
1
4
8
18
9
16 1
8
1
20
21
40
41
60 61
80
12
3
4
BE
BE
EB
CC
CC
BEE
BEE
BE
BE
D77
D57
D71
D302
J1/
J
5
P1
D52
D54
D203
D259
D260
Q72
Q73
D254
D73
CN2
WH1
Q155
D72
D75
D251
D252
D253
D255
D256
D257
D258
D401
Q71
Q51
Q52
Q74
Q252
D53
D55
D76
D261
Q53
D74
D402
D403
D81
IC4
IC3
IC6
IC1
IC8
IC7
IC11
ELECTRIC UNIT X34-3402-7x (J76-0048-12)

15
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
ONMLK
1
2
3
4
5
6
7
Refer to the schematic diagram for the values of
resistors and capacitors.
W322
R596
R598
C562
R600
C515
R601
W833
W310
C96
C97
2
55
5
6
C505
C507
C508
C512
C547
C563
C584
C600
CF51
CF52
CF53
CF54
W300
L4
L505
L506
L507
L508
L605/R607 W835/
L604/R608 W834/
L509
L518
W301
W251
C6
C303
C331 C332
W306 L501
L502
L503
L504
L520
W324
W320
R338
R339
W315
R544
R523 C542
W308
R597
W801
X501
5
W302
W304
W305
W307
W309
W314
W311
6
W319
3
W325
W303
R172
C551
C579
C556
R605
W152
C333
C334
C503
C506
C509
C510
C511
C513
C516
C517
C518
C519
C520
C623 W803
C521
C522
C526
C527
C531
C543
C545
C548
C553
C554
C559
C561
C568
C582
C583
C580
C585
C586
C587
C627
C588
R562
C589
C590
W820
C601
C604
C605
C606
C628
W92
R97
R335
R336
R504
R506
R565
C626
C301
C302
C502
C504
C514
C524
C525
C541
C544
C549
C550
C564
C581
L521
R1
R2
R96
R98
R152
R153
R156
R157
R158
R159
R160
R161
R162
R163
R164
W94
R301
R302
R303
R304
R305
R306
R307
R308
R309
R310
R311
R332
R435
R436
R501
R502
R503 R505
R507
R520
R521
R522
R543
R545
R546
R561
R566
C620
R567
R589
R590
R591
R592
R603
R594
R602
L600
W87
C602
W506
W804
W812
W814
C610
R599
W604
W611 W805
W605
W802
W832
W826
R331
W75
L
9106751
51
51
15
14
24
23481211 13 R
W93
L601
C620
W823
W76
W79
W88
W85
W89
W86
W90
L602
R99
W808
W831
W810 W806
W807
C624
C625
1
00 TUNOUT
VT
SD
S-METER
14
5
8
1
20
21
40
41
60 61
80
B
E
EB
G
SB
C
BE BE
D301
D302
D303
D304
D305
D306
J2
J5
J6
D162
J4
H
1
CN3
Q151
Q330
D3
D501
D504
D506
Q351 Q352
D502
D503
Q501
IC15
IC10
IC11
X34-3402-7x
Ref.No. Address
IC1 6I
IC3 4G
IC4 2J
IC6 4I
IC7 4I
IC8 6H
IC10 5L
IC11 4K
IC15 6K
Q51 3I
Q52 3I
Q53 3H
Q71 3G
Q72 2F
Q73 3F
Q74 5H
Q151 6L
Q155 6H
Q252 3I
Q330 3K
Q351 3L
Q352 3L
Q501 4L

16
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
PQRST
1
2
3
4
5
6
7
PC BOARD (COMPONENT SIDEVIEW)
Refer to the schematic diagram for the values of resistors and capacitors.
S
D
G
EB
C52
C44
C25 C29
C50
RFOK
R12
C3
C8
C10
C11
C13
C15
C27
C35
C37
/RESET
MIDIO
MIACK
C41
C46
C32
CP6
R27
R47
C18
CP2
CP3
CP5
CP7
CP11
R6
R13
L1
R42 R46
R48
R49
R50
R63
R38
CP12
CP15
CP13
R68
CP14
R65
R67 C69
C67
C66
R66
R69
C72
1
34
5
1
1633
48
32 17
6449
BEC
CBE
Q5
Q4
Q7
S1 S2
S3
S4
IC3
IC6
CD PLAYER UNIT X32-5500-00 (J74-1552-12)
X32-5500-00
Ref.No. Address
IC3 4Q
IC6 5R
Q4 5Q
Q5 5S
Q7 5R

17
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
YXWVU
1
2
3
4
5
6
7
PC BOARD (FOIL SIDE VIEW)
Refer to the schematic diagram for the values of resistors and capacitors.
C54
L2
R21
C24
C71
R54
R56
R53
R58
C57
C56
R57
C63
C58
R60
R62
R59
R61
R52
R5
CP1
R10
C12
C5
R70
R2
C7
R9
R34
C28
R36
R35
C6
C34
R22
R37
C30
C31
R43
C26
C21
R29
R64
C38
R45
R44
C53
R40
C51
C48
C49
R51
C36 C47
CP4
R23
C16
X2
C14
R18
CP16
R14
R11
R7
R8
R17
R15
R16
C9
C19
C4
R1
C70
C42
C20
R31
R33
R32
C22 C23
R24
R25
C17
X1
R3
R4
C1 C2
C68
C64
C43
C33
R28
C45
CP9
CP8
C59
C55
R55
CP10
C60
R39
C61
C62
C39
1
16
1
100 25
51
75
76 50
26
1
34
5
3
1
4
5
241
45
31
25
15
26 1
50
100
76
7551
16
130
BEC
CEBBEC
ECB
13
45
S
D
G
EB
EB
EB
BU5V
S.7.5V
FCS
TRK
/MUTEL
/MUTER
SLED
SD
TD
S.GND
MOTOR
SPDL MD
FD
/MSTOP
LIM-SW T2
INT
T1 /RST
T3 T4
FLAGIN
SEARCH
/RESET
BU3.3V /STB
TXD1
/MICK
CLK
A0
/BOOT
/MILP
RXD1
LZM
RZM /MIRST
/MICS
POND3.3
XI
FOGUP
/MRST
SLED IN
LD
LO/EJ
DGND
/EJECT
/LOAD DATA
SLED OUT
/MUTER
D5V
8EJE
LOE/LIM
D.GND
FCS UP
D3.3V
TRK IN
TRK OUT
FCS DOWN
LOS Lch
/MUTEL
Rch
/MSTOP
PON
T
ADCIN
/CLK
FE
D.OUT
Vref
VR
IOP-
PD
C+D
VCC
TE
RF
ARF
F
E
F
A
B
SDO
SPDL+
SPDL-
A.GND
DAVdd3.3V
12EJE
A.+8V
BU2.5V
LRCKIA
D.GND
SDIO
MIRR LOCK HOLD
TZD
BCKIA
TXO
FZD
IOP+ GND
ATEST
FLAG
TX
Vref
REQ
STBY
Q6
Q3
Q10
CN1
D3
Q8
Q9
D2
CN2
Q1
IC2
IC4
IC5
IC1
IC9
IC7
IC8
CD PLAYER UNIT X32-5500-00 (J74-1552-12)
X32-5500-00
Ref. No. Address
IC1 5X
IC2 2W
IC4 5V
IC5 3V
IC7 4W
IC8 3X
IC9 3W
Ref. No. Address
Q1 5X
Q3 5V
Q6 5W
Q8 2V
Q9 3V
Q10 3V

18
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
ABCDE
1
2
3
4
5
6
7
X34-3402-7x (1/4)
4.7K
4.7K
22K
22K
0V
5V
5V
0V
FM : 0V
4.6V
0V
AM : 0V
0V
0V
3.3V
3.9V
8.1V
4.0V
4.7V
4.0V AM : 5.9V
FM :5.9V
0V
4.0V
2.5V
0V
8.1V
0V
0V
0V
4.0V3.0V
8.1V
4.0V
0V
5.0V
0.2V
3.4V
5.0V
3.3V
0.6V
3.8V
8.1V
3.0V
0V
5.0V
3.0V
0V
8.1V
4.3V
2.2V
1.8V
8.1V
4.3V
3.8V
2.0V
2.0V
0V
3.5V
8.2V
7.8V
0V
5V
0V
5V
0V
2.5V
5.0V
2.5V
0V
FM : 4.3V
AM : 5.5V
AM : 0V
FM : 2.4V
AM : 1.8V
FM : 0V
FM :
AM :
AM : 3.5V
FM : 0V
AM : 4.3V
FM : 3.7V
AM : 3.0V
FM : 0V
AM : 4.9V
FM : 4.5V
AM : 4.2V
FM : 0.2V AM : 3.1V
FM : 0V
AM : 0V
FM : 4.0V
AM : 4.1V
FM : 5.2V
AM : 8.0V
FM : 8.1V
8.1V
2.8V FM : 0V
AM : 3.75V
AM : 3.8V
FM : 0V
5.0V
3.0V
IC7
IC10
A
ELECTRIC UNIT (X34-3xxx-xx)
DAUGHTER UNIT (X89-2690-10)
P1
∗
D162
D506
J5
D502
D503
D501
D3
J4
Q501
REMOTE
WIRED
D504
∗
A
∗
CN3
2/2 X16-
J1
Q222
Q221
Q225
CN91
CN90
to 2-PRE OUT
KRA303-P or
RT1P241M
DTA124EUA orQ225 ::Q221,222 DTC143TUA or
RT1N430M
KRC410-P or
(X89- )
(X89-2690-10)
E-VOL & TUNER
2-PREOUT
MUTE
AM RF AMP
RDS DECODER
ANT.
MPTC
GND GND
FSU
C589
L519
4.7NH
C116
330P
10u16
8
7
6
5
4
3
2
1
C117
2.2u50
TP314 FSELFILOUT
C118 C119
0.01
9
10
11
12
13
14
15
16
OSCINMPX
EXTRES
ARI
GND
OSEL
TM
VCC
OSCOUTVREF
RDDA
QUAL T57
RDCL
4.7uH
L101
C113
10P
C112
10P
TP317
R114
R113 2.2K
R112 2.2K
TP501
R544 2.2K
R543
5.6K
C541
270P
L507
8P
C543
C610
1P
5P
C542
15P
C544
R595
10
R59
0
TP157
VFD DATAF
VFD CE
VFD CLK
VFD DATAS
REMOTE
RTRY CCW
TDF DET
ESD GND
13
14
15 10 11
12 8
9
TP166
1K
470
1K
TP164
TP163
TP162
100
1K
470 470
TP161 TP160 TP159 TP158
2.2K
470 470
470
FL+B
VFD RST
RST
5
6
7
4
R156 1K R157 1K
TP156
TP154 TP155
2.2M
100K
R193 XTALG
10.250MHz
X501
0.033
C549 2200P
R546 4.3K
R545 33K
C553 0.1
C559 3300P
C548
0.022
C547
22u10
0.01
C623
0.01
10
0.1
R604
23
22
21
26 25
24
29 28
27
VCC
LPHC
VCOE
GND
20
LP LPOUT
VCOB
WINTC2
19
18
17
16
VCC3 VREF2 ISSTC1 ISSTC2
C620
0.01
OUTRR
WININ
SSTOP
DCOUT
R567 1K R566 1K 32
31
30 35
34
33 38
37
36 40 39
IN1L SDA XTALD SCL OUTFR IN1R IN1C OUTRL OUTFL
41
42
43
44
45
TP431
TP430
4
7
R
5
2
2
R507
C504
0.01
1000P
C521
L505
0.33uH
C522
C626
1000P
R520
220 R521
1.5K
18P
C524
15P 0.33uH
C525 L520
C516 L501
10P
C503 0.1
C505
4.7u16
C502
L502
33uH
1500P
R501
6.8K
6.8uH
R502
2.2K
L518
∗C526
100P L521
10NH
∗C604
C518 C520
1
C517
0.47
∗C606
∗C605
L506
100P
R503
2.2K
C507
22u10
C506
1K
0.68
C510 100P
C509 68P
R504
4.7
C508 22u10
1K
C602 150P
L600
TP506 L4
R505
L503
1000uH
R594
10
R605
10 100uH
TP507
1K
∗R172
TP345
L602
R2 10
0
R1 10
0
C581
450.000kHz
CF54
VCCIF1
IF1AMP1OUT
IF1REF
IF1AMP1IN
GND
IF1AGCIN
FSTC
AMAGC2TC
MIX1OUT2
C519
1
0.47
C531
1
R603 56
C514
GND
FMMIX1IN2
WINTC1
FMAGCTC
TV1
15
14
13
12
FMMIX1IN1
FMPINDR
11
10
9
8
AMRFAGCOUT
4
AMPINDR
AMMIX1IN1
AMMIX1IN2
7
6
5
DEVTC
MUTETC
MIX1OUT1
3
2
1
0.47u50
C563
R599
22
C582
0.022
78 79 80 75 76 77 72 73 74
0.1
1u50
100P
C579
0.01
GND
AMMIX2OUT2
AMMIX2OUT1
VCC2
FMMIX2IN1
FMMIX2IN2
AMRFAGCTC
IF1AMP2OUT
AMDETC
AMREFDEMC
IF1AMP2IN
SMUTE
QUALITYOUT
VCC
MPXIN
MPXOUT
AMIFREE
FMREFDEMC
GND
AMIFIN
VREF1
FSW
AFS
46
47
48
49
IN2R
IN2L
50
51
52
53
C5
6
57
54
55
56
58
59
60
C5
8
C58
8
R601
1u50
0.022
3900P
0.068
69 70 71 66 67 68 63 64 65 61 62
C
5
10
u
C624
0.01
L508 10.700MHz
CF51 10.700MHz CF52 L509
10.700MHz
CF53
R591
51K C585
0.01
TP50
4
13
14
60 65
10
9 8
12
11
63
R158
∗R162
R163 R164
R178 R190
R191
R182
R181
R180R160
R161
470K
FR
FL
RL
L
R
G
R597
C551
10
R596
6800P
C545
C550
R522
22K 1000P
C527
0.01
C625
L504
R506 1M
C601
C515 C590 C583
C587 C584
RR
R
5
GND
64
32
34
2.2K
X3
4.332MHz
21
FL+B
SW5V
10
LED+B
R159
VCC1 (DIG)
C222
C221
10u16
270
R221
10u16
270
R222
R225
TP2
100
R229
R226
30K 30K
TP3 100
R230
TP1
W101
MUTE
GND
2VDD
1
5
4
3
FR
FL
1
2
3
TP8
TP6
TP5
TP4
TP7
GND
R
L
390K
R565
C554 0.33
0.01
C513
1.2K
R602
MD RECEIVER E303MD J
EKDC-2031SG/Y EKDC-2031SA/Y MKDC-229 MKDC-129/S KKDC-128/CR KKDC-1028 JRDT-101 JE202 EKDC-F331G EKDC-F331A EKDC-309G EKDC-309A EKDC-3031G/Y EKDC-3031A/Y MKDC-3029R MKDC-3029 MKDC-2029
CD RECEIVER
KKDC-228 EKDC-WF431A EKDC-W4531/Y EKDC-W431GY EKDC-W409/Y EKDC-W4031/Y MKDC-MP4029/G
DISPLAY
MKDC-MP3029
14-SEGMENT
KKDC-MP228
(MP3/WMA)
KKDC-MP2028
CD RECEIVER
JE303/S
FUNCTION MODEL NAME
CATEGORY/ DESTI-
NATION
DISPLAY
14-SEGMENT
7-SEGMENT
DISPLAY
CD RECEIVER YES
YES
YES
DAUGHTER UNIT
X89-2690-10
3P
+8V-A
1
R56
2
+
+
+
+
+
+
+
+
+
+
+
+

19
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
X34-3402-7x (2/4)
JIHGF
47K
10K
0V
3.4V
0.4V
1.6V
4V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
0V
5V
0V
0V
5V
0V
5V
0V
0V
5V
0V
4.9V
0V or 5V
0V
5V
0V 0V
5V
5V
0V
0V
5V 5V
0V
0V
0V
0V
0V
5V
0V
5V
0V
5V
5V
0V
0V
5V 0V
5.0V
0V
5.0V
5.0V
0V
5V
4.0V
0V
0V or 5V
4.0V
0V
5.0V
0.2V
3.4V
5.0V
3.3V
0.6V
3.8V
8.1V
3.0V
0V
5.0V
0V
5V
5.0V
0V
0V
0V
0V
0V
5V
4.5V
0V
0V
5V
5.0V
5.0V
5.0V
0V
5.0V
0V
0V or 5V
0V or 5V
5.0V
14.4V
11.4V
0V
0V
5V
5V
0V
0V
5V
5V
0V
5.0V
0.5V or
5.0V
5V
0V
1.4V
IC11
IC6
IC8
IC15
∗
IC1
CN2
∗
Q151
Q155
D403
D203
D402
VFD REGULATOR
D401
DSI
∗
C
6
-
SYSTEM u-COM
PANEL
5V SW
DSI
ILLUMI SW
E2PROM
RESET
MUTE
LOGIC
S-METER
MD RECEIVER
to CD or MD PLAYER UNIT (X32- or X33- )
RDS QUAL
TUN FUNC OUT
PWIC MUTE
PWIC STBY
PS1 3 RDS AFSL
100K
R371 4.7K
C600
L601
100u10
R590 10K
ILL D GND
PAN5V
RTRY CW
(LED+VFD)
FL+B
RST
5
62
3
41
C153
1
R153
R156 1K
TP156
TP154 TP155
TP153
R194
R152
TP152 TP151
TP510
4
1
4
2
4
3
4
4
4
5
TP431
∗W152
R200
1K
R199
240
TP375
4
1
A2 A1 A0
3
2
SCL
WP
VCC
GND SDA
TP430
47K
R592
22K
5 8 6 7
10K
R436
10K
R453
47K
42
41
40 PS1 1
PS1 2
PS2 1
PS2 2
NC
BU DET
39
38
37
L602
C564 0.47
C568
270P
R2 100
R1 100
000kHz
C
F54
4
6
4
7
4
8
4
9
5
0
5
1
5
2
5
3
C561 0.1
5
7
5
4
5
5
5
6
5
8
5
9
6
0
C586 1
C588 0.47
C512
10u16
100K
4.7K
R561
TP504
TP414
TUN ADJ
R438 1K
R437 1K
VOL MUTE
RDS DATA
ACC DET
VSS1
36
35
34
33
RESET2
32
31
30
29
LX REQ M
AUD SCL
AUD SDA
28
27
26
25
LX CON
LX RST
TUN SD
24
23
22
21
R432
4.7K
TP410
TP409
19 20 R439
∗R431
2.2K
VCC
1
2
3
4
R456
GND
8 5 7 6
∗R312
100K
∗R313
SERVO+B
2
CD/MD MUTE L
14
CD/MD SDA
CD LOS SW
CD DISC12
23
D-OUT
CD/MD SCL
21
CD/MD MUTE R
AUDIO+B
GND
17
Lch
19
Rch
15
2024 22
TP351 TP353 TP352
18 16
TP356 TP355 TP354 TP358 TP357
DGND
CD/MD LOE LIM
SW
CD/MD MSTOP
CD/MD MRST
1113
BU5V
9
CD MOTOR
CD LOEJ
D5V
5
D5V
DGND
73
812 10
TP360 TP359 TP362 TP361
64
TP365 TP364 TP363 TP367 TP366
0.47u50
470 470
R352 2.2K R351 2.2K
R370 4.7K
0.47u50
R363 4.7K R358 2.2K
∗R357 2.2K
R356 1K R355 1K R353 1K
SERVO
1
TP369 TP371 TP374 TP373 TP372 R360 2.2K
R359 100
∗R470
TP432
∗R450 470 ∗R451 470 ∗R452 470
TP406 TP405 TP407
CD LOS SW
54
53
52
51
50 49 48
47
46 45
44
43
CD LOEJ CD/MD LOE LIM SW CD/MD MSTOP CD/MD MUTE NC NC CD DISC12 SW CD/MD MRST CD DISC8 SW CD MOTOR CD/MD SCL
60 59 58
57
56 55
RESET
NC
KEY REQ
RDS CLK
OEM DISP DATA OEM DISP CLK OEM DISP CE CD/MD SDA DSI
61
PON FL
REMOTE
62
63
64
C411
R441
47K
2.2K
100K
∗R480
R96
∗R366
R365 4.7K
∗R364 4.7K
R367 100K
∗C152 0.1 ∗R372 470
27K
R100
2.7K
C97
47u16
OUT
VCC
1K
R97
3.3K 100K
R99
NC
GND
CTL
5
3
1
R98
C96
0.47u50
4
2
DC ERR
LINE MUTE
ROTARY CW
AVSS
TUN TYPE1
TUN TYPE2
AVREF1
VFD DATAF
VFD DATAS
VFD CLK
VFD RST
VFD CE
ROTARY CCW
TDF DET
PWIC BEEP
LX DATA S
LX DATA M
LX CLK
XT1
LX REQ S
X2
VSS0
VDD1
65
66
67
68
X1
TEST
XT2
69
70
71
72
RDS NOISE
TUN SMETER
TYPE 2
VDD0
AVDD
TYPE 3
73
74
75
76
TYPE 1 77
78
79
80
16 17 18 13 14 15 10 11 12 7 8 9
R433
2.2K
4 5 6 1 2 3
R440
47K
W365
10K
10.000MHz
X1
18P
C422
R457
∗R412
22P
22K
∗R414
22K
∗R416
22K
C420
1000P
∗R411
∗R471
22K
∗R413
22K
∗R415
22K
10K
TP411
22K
R417
22K
R418
L61
4.7uH
C409
100u6.3
C410
0.01
TP408
TP404
53
54
52
55
45 46
51
47 50
48 49
R
L
C2
C1
60
3
470K
470
10
RR
21
1
80
19
R435R589
2.2
R600
0.01
C562
10u10
C556
R
L
53 47
48 46 45 52
50
49
51
55
54
41
42
39
40
38
14
3NC VDD 2
VSS OUT
65
63
60
79
64
X2
32.768KHz
C408
C407
100P
0.22
1
1
80
9
14
12
13 10
11
8
18
17
16
3
22K
24
23
22
21
2
0.01
C201
19
66
27
29
R454
4.7K
34
32
+5V
SERVO+B
FL+B
+5V +5V
+8V
SW5V SW5V
+8V +8V
SW5V
7
35 36
LED+B
SW SW
CD DISC8
GND
79
2
2
15
43
3
3,43
C565
W826
R368 R369
R562 10M
PIN No.
48
54
49
PIN NAME
MD LOAD
MD EJECT
MD LOS EJE SW
MD LOS EJE
MD EJECT
MD LOAD
+
+ +
+
+
+
+
+
ECB
2SB1565 DTA114EE
DTC143TUA
2SA1576A
2SC4617
2SD1858 2SC4081 DTA124EUA

20
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
KLMNO
X34-3402-7x (3/4)
4.7K 4.7K
22K
22K
22K 22K
22K
22K
22K
22K
22K
22K
2.3V
0V
4.6V
0V
10.2V
14.4V
14.4V
5.0V
8.1V
14.4V
8.1V
13.6V
5.0V
VDD
5V
0V 6.8V 0V 4.5V
0V
0V
14.4V
0V
6.8V
6.8V
0V
6.9V 2.0V
4.3V
0V
VDD
10V
14.4V
7.0V
6.8V
0V
6.8V
6.9V
7.0V
4.8V
6.9V
0V
14.4V
∗
IC4
IC3
∗D260
R
Q352
∗WH1
Q351
L
REAR
Q330
J6 LX BUS J2
D256 D258
D254
D252
Q252
D259
KP2311ETR-G:D502,503 KV1430STL-G
HVC383B-E
D504
D506 : :
D55,261 S2V60∗A
AM01ZNF or
1SR154-400
D1F60-5063 or
UDZS4.7B or
MAZ4082N-L
1SS133
RN739F
B30-1567-05
KDS121-P or
DAN202U or
02DZ4.7F-Y
MAZ4062-L
MC2848
10EDA20
D76,402,403
D203,259,260
D162,301-304
D401
D501
D81
:
:
:
:
:
:
D72,74,75,251-253,255-258
D73,77,254
D57
D71
:
:
:
:
KTA2014P(Y,GR) or
2SA1063A
RT1P241M
RT1P144M
KRA307-P or
2SA1576A or
DTA124EUA or
KRA303-P or
DTC143TUA or
UDZS6.8B or
IMSA-6801-E
02DZ6.8F-Y
MAZ4068N-M
RT1N430M
HN3G01J(BL)-F
1SS355
KRC410-P or
D52,54,305,306
D53
Q501
D3
:
:
:
:
:
Q252
Q330
Q351,352
:
:
:
D76 Q74
Q51
Q52
D55
Q53
D54
∗D81
D73
D77
BR24L04FV-W
2SD1858
2SB1565(E,F)
DTA114YUA or
2SC4081
UMC2N
S-80836CNNB-G:IC8
Q71,74
Q51-53,155
Q72
Q73
Q151
IC10
IC11
IC15
:
:
:
:
:
E-TDA7516
BA00CCWT
:
:
:
IC4
IC3
IC6
IC7
IC1 BD4912-V4
TC7W02FU-F
E-TDA7479AD
:
:
:
:
∗
:∗
Q72
D71
Q73
Q71
J1
D52
D261
D53
SERGE
DET
DET
ACC
D255 D253
D251
D257
MUTE
LINE
∗D72
BU DET
D305
D304
D302
D306 D303
D301
D57
GND LINE
SIGNAL LINE
B LINE
(X34- )
∗D74
D75
∗ B∗ B
∗ D∗ E
POWER IC
Lch
SW
PRE
MUTE
SW
Rch
MUTE
PRE
Q351,352
MUTE DRIVER
IC3
SW
CONTROL
SERVO +B
SW
CONTROL
SERVO +B
AVR
POWER
SUPPLY
IC4
SW
STBY
PRF21BE471QB2TH1 :
∗
R256
R336
30K30K
C331
10u16 R331
270
TP338
TP340
TP339
MUTE
1
GND FL VDD
432
FR
5
R339
100
R335
∗
C333
∗
C334
R305 4.7K
TP306 TP305
TP304 TP301
10u16
C332 R332
270
R304 4.7K
R303 100
TP303 TP302
R338
100
TP307
Lch
12
R309 4.7K R307 4.7K
C303
47u10 4.7
R308 4.7K
C302
0.47
10
CON
REQ M
GND
B.U.
Rch
A GND
48
0.47
R310 100
C301 10
R311 100
DATA S
RST
DATA M
CLK
REQ S
MUTE
11
102
3
6
7
15
13
9
TP308 TP310 TP309 TP312 TP311
∗
W252
TP313
∗
W251
C3 0.22u50
R252
47K
10K
R273
470K
R272
R271
100
C256
1u50
∗
C255
∗
R251
C258 1u50
C4 0.22u50 C6 0.22u50 C5 0.22u50
∗
R255
12 11
OFFDET OUT1+ OUT2+ OUT2- OUT1-
FR-
FL-
FL+
FR+ 6
4
2
10
8
9 5 3 1 7
TAB1
PWGND1
PWGND2
STBY
VCC1
OUT4+ OUT3- OUT4- SGND OUT3+
24
RL+
RL-
RR+
18 16
14
IN3 IN1
22
20
RR-
26 HSD
23 21 19 17 15 13
SVR
IN2
IN4
VCC2
PWGND3
ACGND
27 25
TAB2
PWGND4
MUTE
R138
4.7
R140
4.7
R141
2.2 R139 4.7 R136 4.7
R137
4.7 R135 4.7
R133
4.7
R131
4.7
R130
4.7
∗
R81
10K
C82 0.022
R76 10K R75 10K R78 10K R77 10K
TP26
TP25
TP30
TP27
TP31
TP28
4
.
7uH
3
TP420
R53
100K
0.01
R57 22K
R55
10K R54
20K
C55
R60
10K
0.01
∗
C81
0.01
∗
R82
R61
22K
∗
R83
R73 4.7K
∗
R72 4.7K
VDD
C79 22u10
C78 100u25 C80 100u25
C74 0.1 C76 0.1 C75 0.1 C77 0.1
L3
22uH
R87 1 R86 1 R85 1 R88 1
12
11
10
SEL2
SEL1
VCC2
47u16
TP73
TP72
∗
C73
0.1
∗
R89
1
C72
0.1
C52
1000P
R90
1
W420
GND
TP74 AM
AUDIO
SW5V
VCC1
9
8
7
6
P.CON
P.ANT
ILM
5
4
3
2
TP71 1
C69 0.47
C71
R21
1.5K
TH1
R253
4.3K
R254 10 TP316
∗
R257
R52
39K
∗
W368
C257
1u50
R51
68K C54
R58 3.3K
1/2W
R59
33K
TP315
PHONE
FRONT L+
FRONT L-
FRONT R-
FRONT R+
REAR R+
REAR L+
REAR L-
REAR R-
P-CON
RL-
FR-
RL+
FL+
FL-
FR+
RR+
RR-
11910
8671412 13
P-ANT
534
L51
140uH
FUSE
F1 10A (F52-0006-05)
15 16
GND
2
ACC
1
B.U.
C51 TP10
TP16
TP9
41
39 38
40
42
10K
R56
1000P
C53
RL
FR
FL
RR
∗
W346
3
29
15
27
24
23
G
R
L
22
17
18 16
2
66
R301
R302
R306
SW5V
+5V
+8V
SERVO+B
FL+B
+5V
680P 680P
TP344
TP343
TP342
TP341
3300u16
TP15
TP12
TP13
TP14
TP6
TP7
TP8
TP11
TP2
TP3
TP4
TP5
TP1
RL
RR
FL
FR
7
36 35
2
P-ANT
P-CON
PHONE
ACC
P-ANT
P-CON
PHONE
+5V
SW5V
43
+5V
∗
W51
ACC
BU
BU
Q351
Q352
Q74
+
+
+
+
+ + +
+
+
+
+
+
KDC-W4031/W4031Y/W409/W409Y/W431GY/W4531/W4531Y/WF431A (1/2)
UMC2N DAN202U DA204U
DTA114YUA TC7SH08FU