Kenwood KDC-W6027Y, KDC-W6027, KDC-MP6026 Service Manual

CD RECEIVER

KDC-MP425/MP6026 /W6027/W6027Y

SERVICE MANUAL

© 2003-12 PRINTED IN JAPAN B53-0116-00 (N) 2704

CD MECHANISM EXTENSION CORD (24P) : W05-0934-00

KDC-MP425

Panel assy (A64-3187-12)

KDC-MP6026

Panel assy (A64-3194-12)

KDC-W6027 /W6027Y

Panel assy (A64-3197-12)

Plastic cabinet assy	Mounting hardware assy	Lever	DC cord	DC cord
(A02-1486-13)	(J22-0011-03)	(D10-4589-04) x2	(E30-6295-05)	(E30-4958-05)

Escutcheon	Screw set	Screw set	Remote controller assy (RC-505)	Antenna adaptor
(B07-3098-02):KDC-MP425	(N99-1719-05)	(N99-1730-15)	(A70-2040-05)	(T90-0523-05)
(B07-3083-02):Others			Size AA battery
			(Not suplied)

	TDF PANEL INFORMATION
	MODEL	TDF PANEL No. TDF NAME
	KDC-MP425	Y33-1920-61	TDF-44D
	KDC-MP6026	Y33-1920-64	TDF-MP6026
Depends on the model. Refer to the parts list.	KDC-W6027/W6027Y	Y33-1920-65	TDF-W6027

2

TUNER

AUDIO OUT

S-METER

PLL-DATA

PLL-CLK

IFC OUT

AM+B

SW5V

A8V

Q101

BUFFER

CD

MS DATA

MS CLK

SW1

SW2

SW3

SW4

M MUTE R

M MUTE L

M RST

MSTOP LO/EJ

MOSW

SERVO+B

A8V

BU5V

CD MECHA+B

SW5V
IC7
RDS		Q201
DECODER
		BUFFER
IC1
S-METER	RDATA RCLK QUAL	NOISE

SYSTEM

MICROPROCESSOR

		A8V
	IC2	AUX
	FM		FREE
	AM
	MP IN	E-VOL
	LEVEL		REAR
		&
	CD
		MPX
	CH
	AFS		FRONT
	QUAL

PRE MUTE

MUTE

P-MUTE

BEEP

EXT.AMP.CON

DIMMER

PHONE

ACC DET

								B.U DET
									PS1-0
	BU5V								PS1-1
									PS1-2
	PANELDET	EJECT DSI	DATASL CLKL CEL DATALL	AVOL BVOL	REMO	DATAV CLKV	DATA-O	CLK-O CE-O	PS2-0
									PS2-2
									RST

CH

REQ C

CH CLK

DATA H

CH-CON

REQ H

DATA C

CH RST

CH MUTE

			IC1	DA CONVERTER
			LCD DRIVER	(V-ILL ONLY)
	BACK UP		WITH		IC2
		PANEL DET	KEY MATRIX	REMOCON

DAUGHTER UNIT (X89- )

	S1	S1
		RESET SW
	EJECT SW	ROTARY
		ENCODER
	DSI	LCD
	EJECT ILLUMI
		SWITCH UNIT (X16- )

IC6

MUTE

DRIVER

		AUX IN
	PRE MUTE	PRE OUT
		(REAR/NF)
	PRE MUTE	PRE OUT
		(REAR) 3PRE
	PRE MUTE	PRE OUT
		(FRONT)
		IC4

MODE	K,M-TYPE	E-TYPE
CD,MP3	3600mV	3600mV
FM	1800mV	1372mV
AM	600mV	855mV
CH	3600mV	3600mV

BU5V	POWER	SP OUT
	IC

	THERMAL	BACK UP
	PROTECT
	SW5V
	EXT AMP	EXT.AMP.CON
	DIMMER	DIMMER
	TEL MUTE	TEL MUTE
	ACC DET	ACC
	B.U DET	BACK UP
	SURGE DET	BACK UP
	Q21
SERVO+B	SERVO	SW 14V
	IC9
CD MECHA+B	SW REG
		WIRED REMO/
		OPEL DISP I/F

IC8 RESET

Q152 PANEL 5V

BU5V

IC3

AM+B
FM+B
A8V
ILLUMI
BU5V
	Q4
BU5V	SW 5V

POWER	ANT CON
SUPPLY
IC	P CON
SW5V

MP425/MP6026-KDC

W6027/W6027Y-KDC

DIAGRAM BLOCK

KDC-MP425/MP6026

KDC-W6027/W6027Y

DISASSEMBLY FOR REPAIR

How to Disassemble (PANEL ASSY)

1)Remove four screws (A).

2)While holding the section (B) indicated with arrows, pull and remove PANEL ASSY.

A x2

A x2

How to install knob (SRC)

1)Place knob (F) and knob (G) in the positions indicated in the diagram below.

2)While keeping these positions, use a piece of adhesive tape

(H) to hold knobs in position, as shown in the diagarma.

3)Set the rotary (J) position as shown in the diagram.

4)While keeping the letters “SRC” horizontally in position, set it to the rotary on the panel.

5)Remove the adhesive tape (H).

F

G

H

B B

B B

J

3)Pull SWITCH UNIT (C) as indicated in the diagram and remove knob (D).

(The knob (D) is attached to the rotary with hook (E) and it is not possible to remove hook (D) only.)

D

E

C

3

KDC-MP425/MP6026

KDC-W6027/W6027Y

COMPONENTS DESCRIPTION

● SWITCH UNIT (X16-2490-10)

Ref. No.	Application / Function	Operation / Condition / Compatibility
IC1	LCD Driver	Drives LCD
IC2	Remote Control IC	Controls the unit
Q2	REMO ON SW	The power supply of IC2 is turned on when base level goes “L”
Q3	Key Illumination SW (Green)	Lights Green key-illumination when base level goes “H”
Q4	Key Illumination SW (Red)	Lights Red key-illumination when base level goes “H”
Q5	Dimmer Control	Lights LCD Back Light when base level goes “H”

● ELECTRIC UNIT (X34-308x-xx)

	Ref. No.	Application / Function			Operation / Condition / Compatibility
	IC1	System -COM	Controls FM/AM tuner, the changer, CD mechanism, Panel, volume and tone.
	IC2	E.Vol & N.C.MPX	Controls the source, volume, tone and FM multiplex detector.
			Bu5V (5V), Audio8V (8V), FM+B (8V), AM+B (8V), P-CON, ANT-CON
				SW1	OUT
				1.5~3.0	Audio ON
				3.5~5.0	Audio P-CON ON
	IC3	Power Supply IC
				7.0~	Audio P-CON, P-ANT ON
				SW2	OUT
				2.0~3.0	ILL FM ON
				4.0~	ILL AM ON
	IC4	Power IC	Amplifies the front L/R and the rear L/R to 50W maximum.
	IC6	Muting logic IC	Controls logic for muting.
	IC7	RDS decoder
	IC8	Reset IC	“L” when detection voltage goes below 3.6V or less.
	IC9	SW Regulator	Power Supply for MP3
	Q1	Serge Detection	“L” when the back-up voltage becomes more than 24V (momentary power down).
			“H” when the back-up voltage becomes less than 24V.
	Q2	BACK-UP Detection	“L” when B.u is present.
			“H” when B.u is absent or momentary power down is detected.
	Q3	ACC Detection	“L” when Acc is present.
	Q4	SW 5V	ON when the base is “L”.
	Q21	Servo Regulator
	Q22	Servo SW
	Q23	Control Power Supply IC
	Q31	Dimmer Control	Dimmer ON when the base is “H”.
	Q41	SW Regulator Control
	Q101	Composite signal buffer

4

KDC-MP425/MP6026

KDC-W6027/W6027Y

COMPONENTS DESCRIPTION

	Ref. No.	Application / Function	Operation / Condition / Compatibility
			DSI lights when the base is “L”.
	Q151	DSI Driver	DSI turns off when the base is “H”.
			DSI turns on and off when panel is taken off.
	Q152	Panel 5V SW	When the panel is attached, the base goes “L”, turning the Tr ON to supply 5V to the panel.
			When panel is taken off, panel 5V cut off.
	Q153,154	ILL Control	ILL lights when the base of Q153 is “H”.
	Q201	Noise buffer
	Q350	Pre and NF Mute SW	Drives the Pre and NF Mute sw (Q351,355) when the base is “L”.
		(not always Pre and NF)
	Q351	Pre / NF Mute SW	Mutes the Pre Rear Lch or NF Lch when the base is “H”.
	Q352	Pre / NF Mute SW	Mutes the Pre Rear Rch or NF Rch when the base is “H”.
	Q354	Pre and NF Mute SW	Drives the Pre and NF Mute sw (Q352,356) when the base is “L”.
		(not always Pre and NF)
	Q355	Pre Mute SW	Mutes the Front Lch when the base is “H”.
	Q356	Pre Mute SW	Mutes the Front Rch when the base is “H”.

MICROCOMPUTER’S TERMINAL DESCRIPTION

● SYSTEM MICROCOMPUTER : UPD703030GC044 (X34 : IC1)

	Pin No.	Pin Name	I/O	Application	Truth	Processing Operation Description
					value table
	1	PLL CLK	I/O	CLK output terminal to F/E
	2	Not used	O
	3	PANEL-DET	I	Panel DET terminal		No panel DET : L, Panel DET : H
	4	IC2 SDA	I/O	DATA input/output terminal with E-VOL
	5	IC2 SCL	I/O	CLK output terminal to E-VOL
	6	VDD	-
	7	VSS	-
	8	FLIP-DET	I	Flip DET terminal		L : Panel DET, H : Panel flippable
	9	BEEP	O	BEEP output terminal
	10	REMO	I	Remote control input
	11	R QUAL	I	RDS decoder QUAL input terminal
		Not used	O	Destination other than E and E2

5

KDC-MP425/MP6026

KDC-W6027/W6027Y

MICROCOMPUTER’S TERMINAL DESCRIPTION

	Pin No.	Pin Name	I/O	Application	Truth	Processing Operation Description
					value table
	12	R DATA	I	RDS decoder DATA input terminal
		Not used	O	Destination other than E and E2
	13	L CE	O	CE output terminal for LCD driver
	14	Not used	O	Non variable illumination switch destination
	15	Not used	O	Non variable illumination switch destination
	16	DSI	I/O	EJECT KEY ILL, GUIDE ILL,		FLIP-DET “H” and PANEL-DET is “L” : “H” / “L”
				DSI control terminal		FLIP-DET “H” and PANEL-DET is “H” : “L”
	17	DIM CON	O	Dimmer control terminal		50ms interval : “H” / “L”
	18	TEST	-
	19	ILL CON	O	During FLIP DET ILL+B OFF		During FLIP DET “L” : H
	20	VOL A	I	Volume key input		When looking at VOL, also look at FLIPDET
	21	VOL B	I	Volume key input		When looking at VOL, also look at FLIPDET
	22	MOSW	O	CD mechanism MOTOR IC SW		Loading, Eject, Brake : H
	23	LO/EJ	I/O	CD mechanism LOADING, EJECT switching		STOP, Brake : Hi-Z, Loading : L, Eject : H
	24	M STOP	O	STOP request to CD mechanism
	25	M RST	O	Reset output terminal to CD mechanism		Normal : H, Reset : L
	26	MUTE	I/O	MUTE terminal		Hi-Z : Mute ON, L : Mute OFF
	27	LOE/LIM SW	I	CD DOWN SW DET terminal		H : Chucking
	28	M-MUTE L	I	MUTE request terminal from CD mechanism		L : Mute request
	29	M-MUTE R	I	MUTE request terminal from CD mechanism		L : Mute request
	30	PANEL 5V	I/O	Panel 5V control terminal		Panel DET : L, Detached, Momentary power down : H
	31	RESET	I			Normal : H, Reset : L
	32	XT1	I			32kHz
	33	XT2	I			32kHz
	34	REGC	-			Connect 1 F condenser to GND
	35	X2	I			20MHz
	36	X1	I			20MHz
	37	VSS	-
	38	VDD	-
	39	CLKOUT	-
	40	IC2 TYPE1	I	E-VOL setting switching terminal
	41	IC2 TYPE0	I	E-VOL setting switching terminal
	42~44	TYPE2~TYPE0	I	Destination switching terminal	e
	45	CD MECHA+B	I/O	Power supply control terminal for MP3		ON : L, OFF : Hi-Z
	46	SW5V	I/O	Control terminal for SW5V		ON : L, OFF : Hi-Z
	47,48	PS2-0, PS2-1	O	Control terminal for power supply IC	w
	49~51	PS1-0~PS1-2	O	Control terminal for power supply IC	q
	52	B.U-DET	I	Momentary power down DET terminal		BU DET : L, BU no DET (momentary power down) : H
	53	ACC-DET	I	ACC DET terminal		ACC DET : L, ACC no DET : H

6

KDC-MP425/MP6026

KDC-W6027/W6027Y

MICROCOMPUTER’S TERMINAL DESCRIPTION

	Pin No.	Pin Name	I/O	Application	Truth	Processing Operation Description
					value table
	54	DIMMER	I	Small DET terminal		ON : L, OFF : H
	55	BVDD	-
	56	BVSS	-
	57	Not used	O	Non Ext AMP CON destination		Output “L”
	58	(SVR)	O	POWER IC SVR control terminal		Momentary power down : H
	59	P-MUTE	O	POWER IC MUTE output terminal		During POWER OFF : L, During ALL OFF : L, When TEL MUTE : L
	60	P-STBY	O	POWER IC STBY output terminal		When POWER IC ON : H, OFF : L
	61	Not used	O
	62	PRE MUTE R	O	Rch PRE MUTE output		When momentary power down : L,
						M-MUTE R : L (during CD), 2 zone : H fixed
	63	PRE MUTE L	O	Lch PRE MUTE output		When momentary power down : L,
						M-MUTE L : L (during CD), 2 zone : H fixed
	64	AFS	O	Constant switching terminal at noise DET		During FM seek and AF search : L, During reception : H
	65	O-DATA	I/O	External display DATA terminal
		Not used	O	Non external display destination		No OPEL DISP : L
	66	O-CLK	I/O	External display CLK terminal
		Not used	O	Non external display destination		No OPEL DISP : L
	67	O-CE	I/O	External display CE terminal
		Not used	O	Non external display destination		No OPEL DISP : L
	68	LX_RST	O	Reset output to external devices		Normally : L,
						System RST return, then after 400msec or more : H then L
	69	LX_CON	O	Control output to external devices		ON : H, OFF : L
	70	AVCONT	O	AD reference voltage control output		While in operation : H
	71	AVDD	-
	72	AVSS	-
	73	AVREF	-	AD reference voltage control input		Connect to 70 pin
	74	PHONE	I	PHONE DET terminal		TEL MUTE : 1V or lower,
						NAVI MUTE : 2.5V or higher
	75	TYPE3	I	Destination switching terminal
	76~81	Not used	I
	82	S-METER	I	S-meter DET terminal
	83	NOISE	I	FM noise DET terminal
	84	IFC-OUT	I	F/E IFC OUT input terminal
	85	LX_MUTE	I	MUTE request from external devices		H : MUTE ON, L : MUTE OFF
	86	LX_REQ_M	O	Request output to external devices		Request DET : L
	87	R-CLK	I	RDS decoder CLK input terminal
		Not used	O	Non RDS destination		Output L fixed
	88	LX_REQ_S	I	Request input from external devices		Request DET : L
	89	KEY-REQ	I	Communication request from LCD driver		L : KEY input

7

KDC-MP425/MP6026

KDC-W6027/W6027Y

MICROCOMPUTER’S TERMINAL DESCRIPTION

	Pin No.	Pin Name	I/O	Application	Truth	Processing Operation Description
					value table
	90	LO.S SW	I	Loading start SW DET terminal		Loading start : L
	91	12EJE SW	I	12cm DISC EJECT position DET SW terminal		12cm DISC : L
				12 or 8cm DET
	92	EJECT	I	EJECT DET terminal		L : KEY input
	93	Not used	O			Output L fixed
	94	LX_DATA_S	I	DATA input terminal from external devices
	95	LX_DATA_M	O	DATA output terminal for external devices		Last retention
	96	LX_CLK	I/O	CLK input/output terminal with external devices
	97	L DATAL	I	Data input from LCD driver
	98	L DATAS	O	DATA output terminal to LCD driver
	99	L CLK	O	CLK output terminal to LCD driver
	100	PLL DATA	I/O	DATA input/output terminal with F/E

Truth value table q

PS1-0	PS1-1	PS1-2	AUDIO	P-CON	P-ANT
L	L	L	OFF	OFF	OFF
H (L)	L (H)	L	ON	OFF	OFF
H	H	L	ON	ON	OFF
H	H	H	ON	ON	ON
w
PS2-0	PS2-1	ILLUMI	FM+B	AM+B
L	L	OFF	OFF	OFF
H (L)	L (H)	ON	ON	OFF
H	H	ON	OFF	ON

e

	MODEL	DESTINATION		TYPE
			0	1	2
	KDC-X579	K	L	L	L
	KDC-MP425	K	H	L	L
	KDC-MPV525	K	L	H	L
	KDC-MPV5025	K	L	L	L
	KDC-WV6027	E	H	L	H
	KDC-W6027	E	L	L	H
	KDC-W6027Y	E	L	L	H
	KDC-MPV7026	M	H	H	L
	KDC-MP6026	M	L	H	H

8

KDC-MP425/MP6026

KDC-W6027/W6027Y

TEST MODE

1.How to enter the test mode

•While holding the Preset 1 and Preset 3 keys, reset the unit.

2.How to exit from the test mode

•Reset the unit, momentary power down, ACC OFF, power OFF, and Panel detached.

•(Note) The test mode cannot terminated by Panel is fall down.

3.Initial status in the test mode

• Sources	: All OFF.
• Display	: All segments are lit.
• Volume	: -10 dB (displayed as 30)
• Loudness	: OFF
• CRSC	: OFF regardless of the presence of
	switching function.
• SYSTEM Q	: Flat.
• BEEP	: When pressing any keys, the buzzer
	generates a beep at any time.

•DISPLAY TYPE : TYPE A

4.RDS automatic measurement

•An addition to disposal of substitute for visual check PS display as usual production lines.

•P-CON terminal is OFF by force, when received the PS data and in case of corrobaration PS display is “RDS_TEST”. (“_” is mean blank.)

•This disposal is test mode only.

• P-CON is switching the source or return with power on→ off.

5. Special display in Tuner mode

When any of the following messages is displayed in Tuner mode, the front end may be abnormal.

•“TNE 2P NG”: The EEPROM is set to the default (unstable values) because the F/E was shipped without passing through the adjustment process, etc.

•“TNCON NG”: Communication with the F/E is not possible.

7.CD Receiver Test Mode Specification

•When resetting to start, forced ejection of CD is prohibited. When a CD is in place, the CD is not recognized when reset.

• When this key is pressed, the mechanism jumps to

the following track.
No9 →	No15 →	No10 → No11 → No12 → No13 →
No22 →	No14 →	No9 (Return to the first track.)

• When this key is pressed, the track goes down by one from the currently played track.

•When a CD being played, by pressing [1] key intermittently, the mechanism can be made to jump to Track No. 28.

8.Audio-related specifications

•A short press of the Q key initiates the audio adjustment mode.

•Pressing the key on the remote initiates the audio adjustment mode.

•Fader is selected to the initial item.

•Continuous holding of a remote control key is inhibited.

•Bass, Middle and Treble are adjusted in 3 steps of -8/0/+8 with the Track Up/Down keys.

•Balance is adjusted in 3 steps of L15/0/R15 with the Track Up/Down keys.

•Fader is adjusted in 3 steps of F15/0/R15 with the Track Up/Down keys.

•Volume Offset is adjusted in 2 steps of -8/0 with theTrack Up/Down keys.

9.Menu-related specifications

•A short press of the MENU key initiates the Menu mode. Except, tape source is usually press and hold 1 second to enter the menu mode and short press initiates turn over.

•Pressing the DNPP/SBF key on the remote initiates the Menu mode.

•Continuous holding of a remote control key is inhibited.

•Contrast is adjusted in 3 steps of 0/5/10 (5x7dot), 0/4/7 (14seg) with the Track Up/Down keys.

6.Forced switching of K3I

•Each press of the Preset 6 key in Tuner mode should switch

K3I from AUTO → Forced Wide → Forced Middle → Forced Narrow → AUTO. The initial status is AUTO and the display shows these modes as follows.

• AUTO	: FMA
• Forced Wide	: FMW

•Forced Middle : FMM

•Forced Narrow : FMN

10. Backup current measurement

•When the unit is reset while ACC is OFF (i.e. by turning Back-Up ON), the MUTE terminal goes OFF in 2 seconds in place of 15 second.

9

KDC-MP425/MP6026

KDC-W6027/W6027Y

TEST MODE

11. Special display when the display is All ON

Pressing the Preset keys while the power is All OFF displays the following information.

[14seg 8 digits]

1key	Version display (8 digits, Month/Day/Hour/Minute)
	(Display) xxxxxxxx
2key
3key	Short press: View power ON time. (The All OFF
	period is not counted.)
	Long press/hold: Clear power ON time.
	(Display) PONxxxxx	Max. 65535 (hours)
4key	Short press: Display TAPE operation time.
	Long press/hold: Clear TAPE operation time.
	(Display) TPTxxxxx	Max. 65535 (hours)
5key	Short press: Display TAPE ejection count.
	Long press/hold: Clear TAPE ejection count.
	(Display) EJCxxxxx	Max. 65535 (times)
6key	Short press: Display Panel open/close count.
	Long press/hold: Clear Panel open/close count.
	(Display) PCxxxxx	Max. 655359 (times)
FM key	Display ROM colection version
	(Display) ROM Rxxx	Invalid :ROM R–

[15x7dot 12 digits]

1key Version display (8 digits, Month/Day/Hour/Minute) (Display) SYS_xxxxxxxx

2key
3key	Short press: View power ON time. (The All OFF
	period is not counted.)
	Long press/hold: Clear power ON time.
	(Display) PonTim_xxxxx	Max. 65535 (hours)
4key	Short press: Display TAPE operation time.
	Long press/hold: Clear TAPE operation time.
	(Display) TPTim_xxxxx	Max. 65535 (hours)
5key	Short press: Display TAPE ejection count.
	Long press/hold: Clear TAPE ejection count.
	(Display) EjeCnt_xxxxx	Max. 65535(times)
6key	Short press: Display Panel open/close count.
	Long press/hold: Clear Panel open/close count.
	(Display) PnCnt_xxxxxx	Max. 655359 (times)
FM key	Display ROM colection version
	(Display) ROM Rxxx	Invalid: ROM R–

12. Other specifications

•The line mute against times are 1 second from 10 seconds when starting the test mode.

■Security

•Forced Power ON mode (All models)

Even when the security is approved, resetting the unit while holding the Q and 4 keys makes it possible to turn the power ON for 30 minutes.After 30 minutes have elapsed, it is not possible to return to the previous condition unless the unit is reset again.

•Method of registration of the security code after EEPROM (F/E) replacement (Code security model)

1.Enter the test mode. (See How to enter the test mode)

2.Press the MENU key to enter the MENU.

3.When the message “Security” is displayed, press and hold the Track Up/Down key for 1second to enter the Security registration mode.

4.Enter the code using the FM/AM/Track Down keys.

•FM key : Number up

•AM key : Number down

•Track Up key : Cursor right shift

•Track Down key : Cursor left shift

5.Hold down the Track Up key for at least 3 seconds and the message, “RE-ENTER” appears, so once again enter the code according to Step 4 above.

6.Press and hold the Track Up key for 3 seconds until “APPROVED” is displayed.

7.Exit from the test mode. (See 2 How to exit from the test mode)

(Note) All Clear is not applicable to the security code of this model.

•Simplified method of clearing the security code

1.While the code entry is requested, press and hold the Track Up key for 3 seconds while holding the AUTO key pressed. (----will dissappear.)

2.Enter “KCAR” from the remote.

•Press the 5 key on the remote twice, then press the Track Up key. (This enters “K”)

•Press the 2 key on the remote 3 times, then press the Track Up key. (This enters “C”)

•Press the 2 key on the remote once, then press the Track Up key. (This enters “A”)

•Press the 7 key on the remote twice, then press the Track Up key. (This enters “R”)

3.Security function is canceled and the unit enters the All OFF mode.

4.If you commit a mistake in the code entry, the unit enters the code request mode.

10

A

B

PC BOARD (COMPONENT SIDE VIEW)

SWITCH UNIT

X16-2490-10 (J74-1566-02)

		AM	D3	FM
						D2
RESET
KI3	SRC	S2	D1	VOL		S1
KI4
	KS5		EQ	KI5	VCC	VO
D6	D5					IC2
			D4			GND
				ED1
	KS4
1	1	KI2				69
D7
D10
2	9
D9
3
D8
4
D11	10
5
KI1
D12
6
KS3	24						X16-2490-10
						25	Ref. No.	Address
CLK							IC2	3B
D13
AUTO
		D32		D31

C

D

E

KDC-MP425/MP6026

KDC-W6027/W6027Y

(FOIL SIDE VIEW)

SWITCH UNIT

X16-2490-10 (J74-1566-02)

	AVOL C10	CP1	C11	C8		RESET	KI4
			BVOL				GND-ESD
		2			1
						DGND+ILLGND
C7	R10	ILL+B IFLIP DE 16	J1		15		KI5
R22	R21
		CE
Q2	BE				REMO
		R23	R11
		CL			PANEL 5V
				DO	R6
		DI	CP2
		R9		R8
			R7

D21

			KI1
C6			KS5
R2	C2	C3	C4
R3			R4

R5

R1

C1

1 100

25				76
26			IC1
				75
			50	51
EB
Q4			R14
				KI3
EB		R12	R25	R24 KS3
Q3
R33 R32
E	B		R31
		DIMMER
Q5
C12				C13

KS4

KI2

X16-2490-10

Ref. No.	Address
IC1	5D
Q2	3C
Q3	6C
Q4	6C
Q5	7C

Refer to the schematic diagram for the values of resistors and capacitors.

11

1

2

3

4

5

6

7