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...

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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...

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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...

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● 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...

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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...

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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...

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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...

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• 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...

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■ 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....

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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...