Kenwood Kdcf 331 Manual

							© 2006-12 PRINTED IN JAPAN
B53-0483-00 (
N )
 229
CD RECEIVER
KDC-W237AY/W237GY
KDC-W3037AY/W3037GY
KDC-W311AY/W311GY
KDC-W3537AY/W3537GY/W4037Y
SERVICE MANUAL
This product uses Lead Free solder.
* Depends on the model. Refer to the parts list.
SPARE TDF PANEL
MAIN UNIT NAME TDF PARTS No. TDF NAMEKDC-W237AY Y33-2660-60 TDF-W237A
KDC-W237GY Y33-2660-61 TDF-W237G
KDC-W3037AY Y33-2650-63 TDF-W3037A
KDC-W3037GY Y33-2650-64 TDF-W3037G
KDC-W311AY Y33-2650-65 TDF-W311A
P anel assy
KDC-W3537AY/W3537GY (A64-4042-12)
P anel assy
KDC-W4037Y (A64-4038-12)
KDC-W311GY Y33-2650-66 TDF-W311G
KDC-W3537AY Y33-2650-61 TDF-W3537A
P
anel assy
KDC-W311AY/W311GY (A64-4057-12)
AUTO AME
DISP/KDC-W237
AMSCAN RDM REP F.SEL
FMSCRL
VOL
AT T
AUDSET UP
MENU
B
.BOOSTKDC-W3037
AMSCAN RDM REP F.SEL
FMSCRLDISP/PTY
VOL
AT T
AUD
SET UPTIAME
MENU
B
.BOOST
KDC-W311
AMSCAN RDM REP F.SEL
FMSCRLDISP/PTY
VOL
AT T
AUD
SET UPTIAME
MENU
B
.BOOSTKDC-W3537
AMSCAN RDM REP F.SEL M.RDM
FMSCRLDISP/PTYVOL
AT T
AUDSET UPTIAME
MENU
B
.BOOST
KDC-W4037
AMSCAN RDM REP F.SEL M.RDM
FMSCRLDISP
SW
/PTYVOL
AT T
AUDSET UPTIAME
MENU
B
.BOOST
Panel assy
KDC-W237AY/W237GY (A64-4058-02)P anel assy
KDC-W3037AY/W3037GY (A64-4056-12)
KDC-W3537GY Y33-2650-62 TDF-W3537G
KDC-W4037Y Y33-2650-60 TDF-W4037
Antenna adaptor
(T90-0523-05)
DC cord
(E30-6427-05)Lever
(D10-4589-04) x2
* Escutcheon
(B07-xxxx-xx)Mounting hardware assy
(J21-9716-03)
Carrying case
(W01-1685-05)* Remote controller assy (RC-557)
(A70-2087-05)
Battery
(Not supplied) 
						

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W311AY/W311GY/W3537AY/W3537GY/W4037Y
BLOCK DIAGRAM
216
1
FRONT/
P.ON FL
BU 
DET
PHONE
A CC DET
RST
PHONE
A CC DET / BU DET
PS1-1 / PS1-2 / PS1-3 P. ON FL
PS2-1 / PS2-2
9
5
9 BU 
DET
11 3
MUTE
8
R11-15
12
3 3
31
ROM CORRECTION (NOT USED) 1
1
REAR/SW
1
1
1
1
R80-82 P-ANT
P-CON B.U. ACC PHONE
SP-OUT
PS2-1 / PS2-2 PS1-1 / PS1-2 / PS1-3 R103
1
FL+B
2
LX-BUS
E-VOL
IC2 or IC3
A8V
SYSTEM u-COM BU
POWER DC-DET
Q701-704 PRE-OUT PHONE
A CC-DET
Q101
SURGE-
Q103
BU- DET
Q102
SW14V
Q1 Q2 DC-CN
A8V
SERVO+B D5
BU5
SW5 DET
BU
DC-CN etcBU5
P
AN5V
WIRED
REMOTE RESET IC
IC8
ILLUMI+B
CN
RESET ENCODER ROTARY
REMOTE ILLUMI
KEY
MATRIX KEY VFD
IC1
SW5 IC6
IC2 J1
+B ILLUMI
ILLUMI+B AM+B
S1 ED1CN4,J5
MUTE Q705
J4
J2
A1
SERVO+BA8V
Q302
BU5
1/2W
Rx5
Q301
BU5
BU5 Q901-903
DME1
BU5
SW5 CD
SERVO
SW5
IC
CN3
to GND
S3 J1
SW5 AM+B
A8V
TUNER
FRONT-END ANT.
DECODER RDS
IC7
SW5 ANALOG
SW
IC9
E2PROM
SW5 BU
MECHA CD
CONT SW
Q401
A8V A8V
PRE-OUT
MUTE
BU5
SW5
DSI
F-AUX
J2
P
ANEL DET
Rx3 1/2W
IC1 BU5
SW5 SW14V
FL+B
IC4
POWER
SUPPLY
IC
FL+B
J3 BU5
IC10
VFD
DRIVER Q8,9
Q7
ELECTRIC UNIT (X34- )
SWITCH UNIT (X16- ) 
						

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KDC-W237AY/W237GY/W3037AY/W3037GY/
W311AY/W311GY/W3537AY/W3537GY/W4037Y
VREF8EJE-SW 12EJE-SW LOS-SW
LOE-SW
MOTOR
LO/EJ A.GND A8V
A,B,C,E,F
TR OUT FO OUT
DM OUT
FM OUT A3.3V
LD SIGNAL
S.GND
S7.5V
FO OUT
TR OUT
DM OUT
FM OUT
DRV MUTE
SO
SRAMSTB
SI
B UCK
CCE
PIO0
R246,247 SRAMSTB
B
UCK
CCE
PIO0 SO
SI
MRST MRST C88,R82 C87,R83
R-ch L-ch L-ch
R-ch
ZDET MUTE L/R
D.GND
D GND
BU1.5V
SW1.5V SW3.3VA GND
BU5V
P. O N
E F
A
C B
TR COIL
FO COIL APC
IC4
16.934MHz CLOCK
IC3
3.3V REG
IC7
LOADING & M
OTOR
DRIVER
M OTOR
SPINDLE
S2
S4 S1
S3
(0-01)
SLED
M
OTOR
DM1
DM2
X1
Q1
RF AMP
SERVO
MP3 DECODER
WMA DECODER
1M bit SRAM PROCESSOR
AAC DECODER+ + +
+ + LEVEL
SHIFT
Q11
SHIFT LEVEL
Q12
LEVEL
SHIFT SHIFT LEVEL
Q10
CR FILTER
CR FILTER REVERSAL
CIRCUIT
Q13
BU 1.5V REG IC5
IC6
IC11 SW3.3V REGSW1.5V REG
ONLY
LOADING &
DPU1
CD PLAYER UNIT (X32-597x-xx)
BOARD MOTHER
(X34- )
BLOCK DIAGRAM 
						

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W311AY/W311GY/W3537AY/W3537GY/W4037Y
● ELECTRIC UNIT (X34-467x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 System  µ-COM Controls FM/AM tuner, the changer, CD mechanism, panel, volume and tone.
IC2,3 E-VOL Controls the source, volume and tone.
IC4 Power Supply IC Outputs 5Vx2, 8.1Vx2, 10.2V, P-CON and P-ANT.
IC6 Power IC Amplifies the front L/R and the rear L/R to 50W or 45W maximum.
IC7 RDS IC RDS decoder.
IC8 Reset IC Lo when detection voltage goes below 3.6V.
IC9 Analog SW Multiplex triple 2-channel analog SW.
Q1 SW14V ON when the base goes Hi.
Q2 Servo+B AVR When Q3’s base goes Hi, Servo+B AVR outputs 7.5V.
Q3 Control SW for Servo+B ON when the base goes Hi.
Q7 VFD+B SW ON when the base goes Hi.
Q8 VFD+B AVR When Q9’s base goes Hi, Servo+B AVR outputs 10.5V.
Q9 Control SW for VFD+B ON when the base goes Hi.
Q101 ACC DET ON when the base goes Hi during ACC is applied.
Q102 Serge DET When the base goes Hi, surge voltage is detected.
Q103 BU DET ON when the base goes Hi during BU is applied.
Q104,105 Mute Control ON when the base goes Hi.
Q301 Panel 5V SW ON when the base goes Lo.
Q302 DSI ILLUMI SW ON when the base goes Hi.
Q401 IC9 Control SWSwitches to AUX when the base goes Hi, and switches to LX-BUS (CD-CH) when the base goes Lo.
Q402 Quick Charge Voltage SW Charges voltage quickly when the base goes Hi.
Q701,702 Pre-out Mute SW When a base of the 4 transistors goes Hi, pre-out is muted.
Q705 Mute Driver for Pre-out ON when the base goes Lo.
Q901 DC Offset DET ON when the base goes Hi after Q902’s and Q903’s outputs are separated.
Q902,903 DC Offset DET SW ON when the bases go Lo after IC6’s SP-OUTs (DC) are separated.
●  SWITCH UNIT (X16-386x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 VFD Driver
IC3 Remote Control Sensor
Q1 GREEN LED SW ON when the base goes Hi.
Q2 RED LED SW ON when the base goes Hi.
● CD PLAYER UNIT (X32-5970-00)
Ref. No. Application / Function Operation / Condition / Compatibility
IC3 4ch BTL Driver Driver for focusing & tracking coil, driver for sled & spindle motor, and  operation for disc
loading & ejection.
IC4 Servo DSP with built-in Audio DAC With built-in MP3/WMA/AAC decoder and 1M-bit-SRAM.
IC5 D1.5V REG. Power supply for digital 1.5V.
COMPONENTS DESCRIPTION 
						

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Ref. No. Application / Function Operation / Condition / Compatibility
IC6 D3.3V REG. Power supply for digital 3.3V.
IC7 A3.3V REG. Power supply for audio 3.3V.
IC11 BU1.5V REG. Power supply for back-up 1.5V.
Q1 APC (Auto Power Control) Drives LD (Laser Diode).
Q10~12 5V–3.3V Level Shift Converts signal from 5V to 3.3V, or from 3.3V to 5V.
Q13 Inverter Inverts ZDET signal.
D1 Level DownLowers signal level by about 1.2V so that Lo level signal that turns the regulator ON/OFF
surely becomes Lo judgment level of the regulator SW.
D2 Laser Diode Protection Prevents reverse bias which is applied to laser. Laser destruction prevention.
D3,4 Static Electricity Countermeasure Prevents malfunction by static electricity.
●
 SYSTEM  µ-COM: IC1 on X34- (ELECTRIC UNIT)
Pin No. Pin Name I/O ApplicationTruth ValueProcessing Operation DescriptionTa b l e
1 LX DATA M I/O Data to slave unit Pull-down (GND)
2LX CLK I/O LX-BUS clock 125k~65kHz
3~5 NC - Not used Output Lo fixed
6REMO I Remote control signal input Detects pulse width
7N C- Not used Output L fixed
8BYTE I Memory extended bus width setting Connects to VSS
9CNVSS  - Connects to VSS
10 XCIN  - 32.768kHz
11 XCOUT  - 32.768kHz
12 RESET  - L: Reset
13 XOUT  - 10.0MHz
14 VSS  -
15 XIN  - 10.0MHz
16 VCC1  -
17 NMI I Connects to VSS
18 PANEL DET I Panel communication detection H: Panel detached, L: Panel attached
19,20 NC - Not used Output L fixed
21ROMCOR DETI E2PROM writing request H: Writing
22,23 NC - Not used Output L fixed
MICROCOMPUTER’S TERMINAL  DESCRIPTION
COMPONENTS DESCRIPTION 
						

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KDC-W237AY/W237GY/W3037AY/W3037GY/
W311AY/W311GY/W3537AY/W3537GY/W4037Y
Pin No. Pin Name I/O ApplicationTruth ValueProcessing Operation DescriptionTa b l e
24 PON FL O Key illumination pow er supply control ON: H, OFF: L
25 NC - Not used
26 PON PANEL I/O Panel 5V control ON: L, Momentary power down/Panel detached
: 
Hi-Z, 11 minutes after ACC OFF: Hi-Z
27 NC - Not used Output L fixed
28 PWIC BEEP O Beep output
29 AUD SCL I/O E-VOL clock output
30 AUD SDA I/O E-VOL data input/output
31VFD SYS DATAO VFD data output
32VFD PAN DATAIVFD data input
33 VFD CLK O VFD clock output 125kHz
34 VFD BLK O VFD data blanking output
H: Reset cancelled, L: Reset, Momentary power down
/Panel detached: L, 11 minutes after ACC OFF: L
35 CD SI O CD mechanism serial output
36 CD SO I CD mechanism serial input
37 CD CLK O Serial clock output 1MHz
38 CD LOS SW I CD loading detection
39 PIO0 ICommunication request from mechanism DSPH: Data request
40 CD SRAMSTB O 1M-bit SRAM standby H: SRAM standby
41 EPM I Flash EPM input Connects to VSS
42CD LOE LIM SWICD detection (Chucking SW) H: Loading completed, L: No disc
43 PON CD O CD mechanism power supply control H: Power ON
44 CD LOEJ I/O CD motor control qRefer to the truth value table
45 CD MOTOR I/O CD motor control qRefer to the truth value table
46 VFD CE O VFD control request
47CD DRIVEMUTEOMotor driver mute output
48 CD CCE O CD mechanism chip enable
49 CD DISC8 SW I 8cm disc detection Pull-up (B.U.)
50 CD MRST O CD mechanism  µ-com reset H: Normal, L: Reset
51~53 NC - Not used Output L fixed
54 CD MUTE I CD mute request L: Mute request
55CD DISC12 SWI 12cm disc detection Pull-up (B.U.)
56 ROTARY CCW I VOL key input Detects pulse width
57 ROTARY CW I VOL key input Detects pulse width
58 NC - Not used Output L fixed
59 DSI I/O DSI control OFF: Hi-z, Panel detached: Pulse drives, ON: H
60 RDS DATA I RDS decoder data input
61 RDS QUAL I RDS decoder QUAL input
62 VCC2 -
MICROCOMPUTER’S TERMINAL  DESCRIPTION 
						

							7
KDC-W237AY/W237GY/W3037AY/W3037GY/
W311AY/W311GY/W3537AY/W3537GY/W4037Y
Pin No. Pin Name I/O ApplicationTruth ValueProcessing Operation DescriptionTa b l e
63 NC - Not used Output L fixed
64 VSS -
65 RDS AFS M I/O Noise detection time constant switching wRefer to the truth value table
66 TUN IFC OUT I Front-end IFC-OUT input H: Station found, L: No station
67
PON EXT GNDI/O IC2 external input quick charge controlL: OFF, Hi-Z: Quick charge, When IC2 is in source select:
Hi-Z, Mute L: L, Momentary power down/Power OFF: L
68 MUTE I/O Mute L: Mute OFF, Hi-Z: Mute ON
69
ANALOG CONOAUX/LX audio switching A
UX: H (Switches after 100ms after first-out mutebegins to work), LX/Other source: L
70 LX RST O Forced reset to slave unit H: Reset, L: Normal
71 LX CON O Start-up request to slave unit H: Slave unit ON, L: Slave unit OFF
72 LX MUTE I Mute request from slave unit H: Mute ON, L: Mute OFF
73 LX REQ M O Communication request to slave unit
74 RDS CLK I RDS decoder clock input
75 LX REQ S I Communication request from slave unit Pull-down (GND)
76 PWIC SVR O SVR discharging circuit During 500ms after momentary power down: H,
Since then: L
77 PWIC STBY O Power IC standby control Power ON: H, Power OFF: L
78 PWIC MUTE O Power IC muteSTANDBY source/Momentary power down: L,
TEL mute: L
79 ACC DET I ACC power supply detection ACC found: L, No ACC: H
BU found: L, No BU/Momentary power down: H
80 BU DET I Detection of momentary power down (Operates after less than 4ms after momentary
power down is detected)
81,82 NC O Not used Output L fixed
83 RDS NOISE I FM noise detection
84 TUN SMETER I S-meter input
85 TYPE1 I Destination switching eRefer to the truth value table
86 TYPE2 I Destination switching eRefer to the truth value table
87
PWIC DC DETI DC offset detectionIf DC offset is found 20 times in 100ms with condition
of over 1.0V, it will be judged as DC offset detected.
88 LINE MUTE I Line mute selection TEL mute: Below 1V, NAVI mue: Over 2.5V
89 OFFSET DET I Power IC offset detection
90 PS2 2 O Power supply IC control rRefer to the truth value table
91 PS2 1 O Power supply IC control rRefer to the truth value table
92 PS1 1 O Power supply IC control rRefer to the truth value table
93 PS1 2 O Power supply IC control rRefer to the truth value table
94 PS1 3 O Power supply IC control rRefer to the truth value table
95 PON - Not used POWER ON: H, POWER OFF: L
MICROCOMPUTER’S TERMINAL  DESCRIPTION 
						

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KDC-W237AY/W237GY/W3037AY/W3037GY/
W311AY/W311GY/W3537AY/W3537GY/W4037Y
• Truth value table
q CD motor control
CD motor CD loading/eject
Stop L L
Load H L
Eject H H
Brake H Hi-z
w  AFS control
RDS AFS MCondition
AFS MID LExcept AF search, seeking or tuner source
AFS HIGH Hi-Z Normal reception
e  Destination switching
TYPE 2 TYPE 1 Model
(Pin 86) (Pin 85)
3.6V 0V KDC-W3037AY/W3037GY/
W311AY/W311GY/W4037Y
3.6V 1.2V KDC-W3537AY/W3537GY
3.6V 2.4V KDC-W237AY/W237GY r
 Power supply IC (IC4) control
SEL1 (Pin 10)
PS1-2 PS1-3 PS2-1 ILLUMI P-CON P-ANT
LLL OFF OFF OFF
LLHON OFF OFF
HLHONO NOFF
HHHONONON
SEL2 (Pin 11)
PS1-1 PS2-2A UDIO/SW5AM
LL OFF OFF
HLON OFF
HHON ON
Pin No. Pin Name I/O Application
T
ruth ValueProcessing Operation DescriptionTa b l e
96 AVSS -
97 REF CON O VREF control Connects to VREF
98 VREF -
99 AVCC -
100 LX DATA S I Data from slave unit Pull-down (GND)
MICROCOMPUTER’S TERMINAL  DESCRIPTION 
						

							9
KDC-W237AY/W237GY/W3037AY/W3037GY/
W311AY/W311GY/W3537AY/W3537GY/W4037Y
■ Example
Ke y Description of display Description
5Disc EJECT times displayEJCXXXXXDisc EJECT times display.  MAX 65535 (times)
■ 5 While disc EJECT times is displayed, press and hold for
2 seconds or longer to clear disc EJECT times.
A symbol “ ■” in the key column indicates that the key should be pressed and held for 1 second or longer.
■  How to enter the test mode
Procedure Note
Press and hold the [1] key and [3] key and reset. While “– – – –” is displayed, power can be turned ON for only 30 minutes. (KDC-W3537AY/W3537GY/W4037Y only)
All lamps blink when it is detected that the sub-clock resonator is disconnected.
Do not display “CODE_OFF”, “CODE_ON” or “CODE_NG” when Power is ON.
When having started up in the test mode, change the LINE MUTE inhibition time from 10 seconds to 1 second.
When operating in the test mode, even if a DC offset error occurs, detection information is not written in the E2PROM.
When operating in the test mode, CD mechanism error log information clear mode, and DC offset error detection information clear  mode, do not
perform DEMO mode operations.
Also, do not display DEMO ON/OFF option items in the MENU in STANDBY source in the above modes.
F orced disc ejection is prohibited in the test mode.
■  How to clear the test mode
Procedure Note
Reset, momentary power down, ACC OFF, Power OFF, Panel detached. Clearing the test mode
■  T est mode default condition
Description Default values
Source STANDBY
Display Display lights are all turned on.
V olume -10dB (“30” is displayed.)
Bass Boost OFF
CRSC OFF regardless of having/not having the switching function.
AU X O N
System Q NATURAL (FLAT)
Beep Sound on with a key pressed regardless of any settings.
Preout Sub Woofer
::.
TEST MODE 
						

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■ Special displays when all lights are on in STANDBY source
Ke y Description of display Description
CommonAll lights ON.All lights ON.
1 Destination terminal
TYPE:11“TYPE” indicates system  µ-com (IC1) destination, and shows
condition indication real-time condition of the destination terminal.
Development ID condition
611A2–3 .00Development ID – Version (system  µ-com: IC1)
indication
2 Serial No. display00000000Serial No. is displayed (8 digits)
3P ower ON time display
PON0HXX00~50 is displayed for “XX”.  When less than 1 hour,
displayed by displayed by increments of 10 minutes.
PONXXXXX00001~10922 is displayed for “XXXXX”.  MAX 10922 (hours)
■ 3 When Power ON time is displayed, press and hold for
2 seconds or longer to clear Power ON time.
4 Disc operation time display
CDT0HXX00~50 is displayed for “XX”.  When less than 1 hour,
displayed by increments of 10 minutes.
CDTXXXXX00001~10922 is displayed for “XXXXX”.  MAX 10922 (hours)
■ 4 While the disc operation time is displayed, press and hold for
2 seconds or longer to clear the disc operation time.
(Cleared only for displayed media.)
5Disc EJECT times displayEJCXXXXXDisc EJECT times display.  MAX 65535 (times)
■ 5 While disc EJECT times is displayed, press and hold for
2 seconds or longer to clear disc EJECT times.
6Panel open/closePCXXXXXPANEL open/close times display.  MAX 65535 (times)
■ 6 times display
Press the key for more than 2 seconds while the PANEL open/
close count is displayed and PANEL open/close count is cleared.
FM ROM correction versionRO123The number is the ROM correction version number.
displayERRWhen E2PROM is not installed.
R––––When not written in yet.
****RWhen data not matched. (due to the difference in versions)
■AM ROM data transfer
Audio data initializationANITUD IAUDIO setting value is re-set to the test mode default value.
Forced Power OFFP–––OF FNo forced power OFF
information display
PSECOF FF orced power OFF because of missing Security Code.
(Code security supporting model)
PPNLOF FForced power OFF by communication error between system
µ-com and panel.
■
While the forced power OFF data is displayed, press and
hold for 2 seconds to clear the data.
CD information displayF or the display contents, refer to “CD information display
mode ON/OFF mode” in the next section.
■
While in CD information display mode, press and hold for
2 seconds or longer to clear all CD information.
TEST MODE