KENWOOD KDC-W4031Y Service Manual
CD RECEIVER
KDC-W4031/Y
KDC-W409/Y
KDC-W431GY
KDC-W4531/Y
KDC-WF431A
SERVICE MANUAL
© 2004-12 PRINTED IN JAPAN
B53-0230-00 (N) 1813
PANEL ASSY
KDC-W4031/Y (A64-3455-02)
VOL
AUD
SET UP
FF
MENU
SCAN RDM REP F.SEL
PANEL ASSY
KDC-W431GY (A64-3457-02)
VOL
AUD
SET UP
FF
MENU
SCAN RDM REP F.SEL
PANEL ASSY
KDC-WF431A (A64-3466-02)
VOL
AUD
SET UP
FF
MENU
SCAN RDM REP F.SEL
PANEL ASSY
KDC-W409/Y (A64-3456-02)
VOL
/
PTY
AUD
SET UP
FF
MENU
SCAN RDM REP F.SEL
/
PTY
PANEL ASSY
KDC-W4531/Y (A64-3454-02)
External Media Control
VOL
AUD
SET UP
FF
MENU
SCAN RDM REP F.SEL M.RDM
/
PTY
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
/
PIY
KDC-W431GY Y33-2140-61 TDF-W431GY
KDC-W4531/Y Y33-2140-60 TDF-W4531
KDC-WF431A Y33-2140-63 TDF-WF431
LEVER
(D10-4589-04) x2
ANTENNA ADAPTOR
(T90-0523-05)
DC CORD
(E30-6413-05)
* ESCUTCHEON
(B07-xxxx-xx)
* Depends on the model. Refer to the parts list.
PLASTIC CABINET ASSY
(A02-2736-03)
MOUNTING HARDWARE ASSY
(J21-9716-03)
This product uses Lead Free solder.
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
BLOCK DIAGRAM
J4
ANT
CD or MD
MECHA
AUDIO OUT
J2
CHANGER
AUDIO OUT
BACK-UP
SWITCH UNIT (X16-)
ED1
S11
VOL
AM+B
AM AGC
VFD
Q501
SERVO
A8V
BU5V
.......
L506
FM AGC
800mV
1200mV
RDS
DECODER
IC1
VFD DRIVER
KEY MATRIX
ELECTRIC UNIT (X34-)
IC10
MPX OUT
MPX IN
E-VOL
&
TUNER
IC11
E2PROM
IC7
PAN5V BU5V
REMOTE
with
KEY
ILLUMI
IC8
RST IC
SYSTEM u-COM
IC3
.......
BU5V
IC1
A8V
Q155
DSI
Q351,352
PRE MUTE
IC6
MUTE LOGIC
PAN5
SERVO
Q151
PAN5V
Q72,73
Q51
SURGE DET
Q52
BU DET
Q53
ACC DET
SERVO
VFD REG
IC4
IC15
POWER IC
SW5V
AM+B
A8V
BU5V
J6
FM (J/K Type)
FM (E Type)
AM (J/K Type)
AM (E Type)
CD/MD RECEIVER
J1
IC3
POWER SUPPLY IC
P-CON
P-ANT
SW5V
AM+B
AUDIO+B
VCC
BU5V
ILLUMI
PRE OUT
: 1800mV
:
1372mV
:
600mV
:
855mV
:
3600mV
:CHANGER
3600mV
SP OUT
BACK-UP
ACC
TEL MUTE
P-ANT
P-CON
CD PLAYER UNIT (X32-5500-00)
CN1
DOUT
12EJE
DATA
AGND
MUTER
MUTEL
MRST
MSTOP
LOE/LIM
DGND
DGND
LO/EJ
MOTOR
SGND
LOS
CLK
A8V
BU5
D5
D5
S7V
OPEN
24
S2
23
S1
22
21
20
IC9
A8V
19
18
L
17
16
R
15
14
13
12
DAC 3.3V
AVR
3
Q3,5,6
LEVEL
SHIFT
Q1,4
LEVEL
SHIFT
A3.3V
Q7
LEVEL SHIFT
S3
10
BU5V
9
8
7
D5V
6
5
4
3
2
1
IC5
SW 3.3V
AVR
2
IC1
MECHANISM
CONTROL
MICROPROCESSOR
SW3.3V
S7V
PON
IC6
BU 3.3V
AVR
BU3.3V
IC4
X2
IC7
DAC 3.3V
AVR
4ch BTL
DRIVER
8
1
IC3
MP3/WMA
DECODER
16.00MHz
3
IC2
RF AMP/SERVO
CD SIGNAL
PROCESSOR
BU2.5V
4
FCS
4
TRK
SPD
4
SLD
4
IC8
BUFFER
X1
16.898MHz
Q8
Q9,10
SW
516
VREF
APC
(OPTICAL PICKUP)
CN2
DM1
SPINDLE
M
MOTOR
DM2
LOADING
& SLED
M
MOTOR
DPU1
LD
PD
E
A
B
C
F
TR COIL
FO COIL
2
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
IC2
IC3 MP3/WMA DECODER
IC4 4ch BTL DRIVER
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.
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
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.
Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and
eject operation.
3
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
COMPONENTS DESCRIPTION
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”.
MICROCOMPUTER’S TERMINAL DESCRIPTION
● SYSTEM µ-COM : IC1 on X34- (ELECTRIC UNIT)
Pin No.
1 DC ERR I DC offset detection input
2 LINE MUTE I Phone detection NAVI MUTE : Over 2.5V, TEL MUTE : Below 1V
3ROTARY CW I Rotary encoder input
4AVSS 5 TUN TYPE1 I E-VOL setting switch Refer to “TUN TYPE” on the TRUTH TABLE
6 TUN TYPE2 I E-VOL setting switch Refer to “TUN TYPE” on the TRUTH TABLE
7AVREF1 8 VFD DATAF I Data input from VFD driver
9 VFD DATAS O Data output to VFD driver
10 VFD CLK O Clock output to VFD driver
4
Active
(H/L)
Pin Name I/O Application Processing Operation
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No.
11 L VFD RST O Reset output to VFD driver
12 VFD CE O Chip enable output to VFD 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
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
37 NC 38 PS2-2 O Power supply control output
39 PS2-1 O Power supply control output
40 PS1-1 O Power supply control output
41 PS1-2 O Power supply control output
42 PS1-3 O Power supply control output
43,44 NC 45 CD MUTE I CD mute request L : Mute request
46 L CD MSTOP O CD mecha u-com stop
47 CD LOE LIM SW I CD detection (chucking switch) H : Loading is finished, L : Disc does not exist
Active
(H/L)
Pin Name I/O Application Processing Operation
Display OFF, Key reset, TDF panel OFF : L
Display ON, Key scan : H
Adjustment=H, PS1-1,2=L, PS1-3=Hi-Z,
PS2-1,2=Hi-Z, TUN DATA, CLK=Hi-Z
BU exists : L
BU does not exist (Momentary power-down) : H
Refer to “POWER IC CONTROL” on the TRUTH TABLE
Refer to “POWER IC CONTROL” on the TRUTH TABLE
Refer to “POWER IC CONTROL” on the TRUTH TABLE
Refer to “POWER IC CONTROL” on the TRUTH TABLE
Refer to “POWER IC CONTROL” on the TRUTH TABLE
H : mecha µ-com operates, L : mecha µ-com is stopped
5
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No.
48 CD LOEJ I/O CD motor control
49 CD MOTOR O CD motor control
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
63 KEY REQ I Communication request from VFD 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
Active
(H/L)
Pin Name I/O Application Processing Operation
Refer to “CD MECHA CONTROL OPERATION”
on the TRUTH TABLE
Refer to “CD MECHA CONTROL OPERATION”
on the TRUTH TABLE
VFD ON : H, VFD OFF : L
TDF DET H (DSI blinks) : L, TDF DET L : H
6
MICROCOMPUTER’S TERMINAL DESCRIPTION
● TRUTH T ABLE
• TUN TYPE
General models commercially-designated as pure KENWOOD brand (Initial value)
Initial value setting
• RDS AFSL (AF search)
High
Low
Normal condition communication (IC10 side : High)
(Quality time constant long / Stereo Decoder PLL : Not hold)
AF search (IC10 side : Middle)
(Quality time constant short / Stereo Decoder PLL : Hold)
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
TYPE 1 TYPE 2
LL
• 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
7
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
MICROCOMPUTER’S TERMINAL DESCRIPTION
● CD MECHANISM µ-COM : IC1 on X32- (CD PLAYER UNIT)
Pin No.
1 VREFL - 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
4NC5L20RST O Reset control (Decoder). L : Reset, H : Normal condition
6 20ACK 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
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
42~49 NC -
Active
(H/L)
Pin Name I/O Application Processing Operation
Command/Parameter identification signal output H : Parameter data output,
(DSP). L : Command data output
Loading-end detection/Pick-up inner circumference detection
H : Inner circumference
8
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No.
50 FLAGIN I C2Err impossibility detection.
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
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
Active
(H/L)
Pin Name I/O Application Processing Operation
L : Correction is possible.
H : Correction is impossible.
Mask : Not connected. Flash : For writing (Active “L”).
L : Write, H : Nomal condition
9
KDC-W4031/W4031Y/W409/W409Y
KDC-W431GY/W4531/W4531Y/WF431A
TEST MODE
How to enter the test mode
While simultaneously press PRESET “1” k e y 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 f or 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 appear.
PRESET
“1” key (Display) : x x x x x x x x
PRESET
“2” key (Display) : x x x x x x x x
PRESET
“3” key time display (STANDBY source time is not counted.)
PRESET
“4” key time display
•Version display (8 digits : month, date, hour, minute)
• Serial number display (8 digits)
•When pressed for less than 1 second : POWER ON
(Display) : PON x x x x x MAX 60,000 (hours)
* The display is cleared by pressing the key for more
than 2 seconds.
• When pressed for less than 1 second : CD operation
(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
“5” key number display
PRESET
“6” key close number display
•When pressed for less than 1 second : CD EJECT
(Display) : EJC x x x x x MAX 60,000 (times)
* The display is cleared by pressing the key for more
than 2 seconds.
• When pressed for less than 1 second : Panel open/
(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)
Not effective (When version is different)
“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.
: ROM _ R – – –
: ROM _ R✳✳✳
10
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 “
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 “
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 display “APPR OVED”. This completes the security code registration.
6. Release the test mode. (Refer to “How to release the test
mode” .)
* All clear cannot be used to clear the security code.
” key for 3 seconds or
” key (for less
● 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 _
*2 seconds 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.
11
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
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
1st AM MIX 2nd AM MIX FM antenna
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
Europe 999kHz OFF 35dBµV (EMF)
Except Europe 1000kHz OFF 35dBµV (EMF)
FREQUENCY MODULATION ANTENNA INPUT
● 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
Europe 87.5MHz OFF
Except Europe 87.9MHz OFF
FREQUENCY MODULATION ANTENNA INPUT
5dBµV (LOAD) or
11dBµV (EMF)
5dBµV (LOAD) or
11dBµV (EMF)
12
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