PIONEER DEH- 2750, DEH-2770 Service Manual

ORDER NO.

CRT3396

DEH-2790MP/XN/ID

HIGH POWER CD/MP3/WMA PLAYER WITH FM/AM TUNER

DEH-2790MP/XN/ID

DEH-2750MP/XN/GS

DEH-2770MP/XN/CS

This service manual should be used together with the following manual(s):

Model No.	Order No.					Mech.Module					Remarks
CX-3158	CRT3394					S10.1AAC					CD Mech. Module : Circuit Description, Mech. Description, Disassembly

For details, refer to "Important Check Points for Good Servicing".

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium

PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION 2004

K-ZZA. NOV. 2004 Printed in Japan

1

2

3

4

SAFETY INFORMATION

This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.

AQualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual.

Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician.

- Service Precaution

1.You should conform to the regulations governing the product (safety, radio and noise, and other B regulations), and should keep the safety during servicing by following the safety instructions

described in this manual.

2.Before disassembling the unit, be sure to turn off the power. Unplugging and plugging the connectors during power-on mode may damage the ICs inside the unit.

3.To protect the pickup unit from electrostatic discharge during servicing, take an appropriate treatment (shorting-solder) by referring to "the DISASSEMBLY".

4.After replacing the pickup unit, be sure to check the grating.

C

D

E

F

2		DEH-2790MP/XN/ID
1	2		3	4

5

6

7

8

[Important Check Points for Good Servicing]

In this manual, procedures that must be performed during repairs are marked with the below symbol.

Please be sure to confirm and follow these procedures.

1. Product safety

Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by following the safety instructions described in this manual.

1 Use specified parts for repair.

Use genuine parts. Be sure to use important parts for safety.

2 Do not perform modifications without proper instructions.

Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as radio/TV interference and foreign noise.

3 Make sure the soldering of repaired locations is properly performed.

When you solder while repairing, please be sure that there are no cold solder and other debris.

Soldering should be finished with the proper quantity. (Refer to the example)

4 Make sure the screws are tightly fastened.

Please be sure that all screws are fastened, and that there are no loose screws.

5 Make sure each connectors are correctly inserted.

Please be sure that all connectors are inserted, and that there are no imperfect insertion.

6 Make sure the wiring cables are set to their original state.

Please replace the wiring and cables to the original state after repairs.

In addition, be sure that there are no pinched wires, etc.

7 Make sure screws and soldering scraps do not remain inside the product.

Please check that neither solder debris nor screws remain inside the product.

8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.

Damaged power cords may lead to fire accidents, so please be sure that there are no damages.

If you find a damaged power cord, please exchange it with a suitable one.

9 There should be no spark traces or similar marks on the power plug.

When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure connections and suitable usage. Please exchange the power cord if necessary.

0 Safe environment should be secured during servicing.

When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.

Please pay attention to your surroundings and repair safely.

2. Adjustments

To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification. Adjustments should be performed in accordance with the procedures/instructions described in this manual.

3. Lubricants, Glues, and Replacement parts

Use grease and adhesives that are equal to the specified substance.

Make sure the proper amount is applied.

4. Cleaning

For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper cleaning should be performed to restore their performances.

5. Shipping mode and Shipping screws

To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be installed before shipment. Please be sure to follow this method especially if it is specified in this manual.

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B

C

D

E

F

		DEH-	2790MP/XN/ID				3
5	6				7	8

	1	2	3	4
	CONTENTS
	SAFETY INFORMATION.....................................................................................................................................			2
	1. SPECIFICATIONS ............................................................................................................................................			5
A	2. EXPLODED VIEWS AND PARTS LIST ............................................................................................................			8
	2.1 PACKING			8
	2.2 EXTERIOR...............................................................................................................................................			10
	2.3 CD MECHANISM MODULE.....................................................................................................................			12
	3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ..........................................................................................			14
	3.1 BLOCK DIAGRAM ...................................................................................................................................			14
	3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)..............................................................................			16
	3.3 KEYBOARD UNIT....................................................................................................................................			22
	3.4 CD MECHANISM MODULE(GUIDE PAGE) ............................................................................................			24
	4. PCB CONNECTION DIAGRAM .....................................................................................................................			34
	4.1 TUNER AMP UNIT...................................................................................................................................			34
	4.2 KEYBOARD UNIT....................................................................................................................................			38
B	4.3 CD CORE UNIT(S10.1) ...........................................................................................................................			40
	5. ELECTRICAL PARTS LIST ............................................................................................................................			42
	6. ADJUSTMENT ...............................................................................................................................................			46
	6.1 CD ADJUSTMENT...................................................................................................................................			46
	6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT ....................................................			48
	6.3 ERROR MODE ........................................................................................................................................			50
	6.4 SYSTEM MICROCOMPUTER TEST PROGRAM ...................................................................................			51
	7. GENERAL INFORMATION.............................................................................................................................			52
	7.1 DIAGNOSIS .............................................................................................................................................			52
	7.1.1 DISASSEMBLY .....................................................................................................................................			52
	7.1.2 CONNECTOR FUNCTION DESCRIPTION..........................................................................................			55
C	7.2 PARTS......................................................................................................................................................			56
	7.2.1 IC ..........................................................................................................................................................			56
	7.2.2 DISPLAY ...............................................................................................................................................			64
	7.3 OPERATIONAL FLOW CHART ...............................................................................................................			65
	7.4 CLEANING...............................................................................................................................................			66
	8. OPERATIONS ................................................................................................................................................			67

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4		DEH-2790MP/XN/ID
1	2		3	4

5

6

7

8

1. SPECIFICATIONS

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B

C

D

E

F

		DEH-	2790MP/XN/ID				5
5	6				7	8

1

2

3

4

A

B

C

D

E

F

6		DEH-2790MP/XN/ID
1	2		3	4

5

6

7

8

A

B

C

D

E

F

		DEH-	2790MP/XN/ID				7
5	6				7	8

1	2	3	4
2. EXPLODED VIEWS AND PARTS LIST
NOTES : • Parts marked by " * " are generally unavailable because they are not in our Master Spare Parts List.

• The > mark found on some component parts indicatesthe importance of the safety factor of the part.

A	Therefore, when replacing, be sure to use parts of identical designation.
	• Screw adjacent to"mark on the product are used for disassembly.

•For the applying amount of lobricants or glue, follow the instructions in this manual. (In the case of no amount instructions,apply as you think it appropriate.)

2.1PACKING

B

3

1

15

4 2

8

C

D

E

F

8		DEH-2790MP/XN/ID
1	2		3	4

		5	6		7	8
(1) PACKING SECTION PARTS LIST
Mark No.		Description	Part No.	Mark No.	Description	Part No.
	1	Accessory Assy	CEA4850
	2	Screw Assy	CEA3849	11	Carton	See Contrast table(2)	A
				12	Contain Box	See Contrast table(2)
	3	Screw	CBA1650
*	4	Polyethylene Bag	CEG-127	13	Protector	CHP2664
	5	Screw	CRZ50P090FTC	14	Protector	CHP2868
				15-1	Owner's Manual	See Contrast table(2)
	6	Screw	TRZ50P080FTC
*	7	Polyethylene Bag	CEG-158	15-2	Installation Manual	See Contrast table(2)
	8	Handle	CNC5395	15-3	Caution Card	CRP1310
	9	Bush	CNV3930	16	Case Assy	CXB3520
	10	Polyethylene Bag	CEG-162	17	Cord Assy	XDE7008
(2) CONTRAST TABLE							B

DEH-2790MP/XN/ID, DEH-2750MP/XN/GS and DEH-2770MP/XN/CS are constructed the same except for the following:

Mark	No.	Description	DEH-2790MP/XN/ID	DEH-2750MP/XN/GS	DEH-2770MP/XN/CS
	11	Carton	CHG5470	CHG5434	CHG5435
	12	Contain Box	CHL5470	CHL5434	CHL5435
	15-1	Owner's Manual	CRD3939	CRD3939	CRD3937
	15-2	Installation Manual	CRD3940	CRD3940	CRD3938

Owner's Manual,Installation Manual

	Part No.	Language
			C
	CRD3939	English, Traditional Chinese, Arabic
	CRD3940	English, Traditional Chinese, Arabic
	CRD3937	English, Spanish, Portuguese(B)
	CRD3938	English, Spanish, Portuguese(B)

D

E

F

		DEH-	2790MP/XN/ID				9
5	6				7	8

1

2

3

4

2.2 EXTERIOR

A

B

C

D

E

F

10		DEH-2790MP/XN/ID
1	2		3	4

	5	6
(1) EXTERIOR SECTION PARTS LIST
Mark No.	Description	Part No.
1	Screw	BSZ26P060FTC
2	Screw	BSZ26P100FTC
3	Cable	CDE7703
4	Cord Assy	XDE7008
5	•••••
6	Case	CNB2793
7	Holder	CNC8659
8	Insulator	CNM9145
9	Tuner Amp Unit	See Contrast table(2)
10	Screw	ASZ26P060FTC
11	Screw	BMZ26P160FTC
12	Screw	BPZ26P080FTC
> 13	Fuse(10A)	CEK1208
14	Pin Jack(CN352)	CKB1059
15	Plug(CN901)	CKM1376
16	Connector(CN831)	CKS3581
17	Connector(CN651)	CKS3837
18	Antenna Jack(CN401)	CKX1056
19	Holder	CND2413
20	Holder	CND2414
21	Heat Sink	CNR1762
22	FM/AM Tuner Unit	CWE1912
23	Holder	CND1054
24	Terminal(CN402)	VNF1084
25	Button(DETACH)	CAC4836
26	Spring	CBH1835
27	Spring	CBH2208
28	Spring	CBH2367
29	Bracket	CNC6791
30	Holder	CNC8042
31	Cover	CNM6276

	7	8
Mark No.	Description	Part No.
32	Panel	CNS8044
33	Arm	CNV4692
34	Arm	CNV4728
35	Arm	CNV5576
36	Screw	IMS20P030FZK
37	Chassis Unit	CXC3600
38	Detach Grille Assy	See Contrast table(2)
39	Screw	BPZ20P100FZK
40	Button(TA, VOLUME(+/-))	CAC8924
41	Button(UP, DOWN, LEFT, RIGHT)	CAC8926
42	Button(BTB, SOURCE)	CAC8927
43	Button(1-6, LOCAL/BSM)	CAC8929
44	Button(EJECT, AUDIO)	CAC8930
45	Button(DETACH)	CAC8931
46	Button(DISPLAY, BAND)	CAC8934
47	Spring	CBH2210
48	Cover	CNS8042
49	LCD	CAW1848
50	Connector(CN1801)	CKS3580
51	Holder	CND2412
52	Sheet	CNM9144
53	Lighting Conductor	CNV8190
54	Rubber	CNV8191
55	Connector	CNV8192
56	Grille Unit	See Contrast table(2)
57	CD Mechanism Module(S10.1AACA)	CXK5663
58	Screw	ISS26P055FTC
59	IC(IC302)	PAL007A
60	Transistor(Q911, 921, 991)	2SD2396
61	Panel	See Contrast table(2)

A

B

C

D

(2) CONTRAST TABLE

DEH-2790MP/XN/ID, DEH-2750MP/XN/GS and DEH-2770MP/XN/CS are constructed the same except for the following:

Mark	No.	Description	DEH-2790MP/XN/ID	DEH-2750MP/XN/GS	DEH-2770MP/XN/CS
	9	Tuner Amp Unit	CWM9693	CWM9693	CWM9970
	38	Detach Grille Assy	CXC4395	CXC3748	CXC4391
	56	Grille Unit	CXC4239	CXC3643	CXC4236
	61	Panel	YNS5045	YNS5045	CNS8048

E

F

		DEH-	2790MP/XN/ID				11
5	6				7	8

1	2	3	4
2.3 CD MECHANISM MODULE
42	5
A	13		81
	34
5		15	22
	5		E
13			F
		93

					13		92
					A
	44				B	82
		5	C	13	86	83	68
		54	D
1			52
B		53			86		28
		37					4
				4	71	23
				1
55
	5	36				87	38
					50
		4		73
		1
2			18 29		72
		64	51		10		75
	47
C				1
		2		I	76 B		59
24		1					49
		7

61	E

2	M	1		F
63			A	Q
	1			27
2				H
		G
21	L		J

M

57	1	N	O		D
		R		16
					12
79
	58
D			1		3	78
		1			33
			P
2
62		2			20
						80

1	40	1

	1GEM1024		1	39
	2GEM1045
				1	25
	3GEM1035		P		69
		56	19	30	70
E					14
	R			41
				31
91	C			65
			1		85
F	3	2			66

26

G

I H

28

45

J

23

K

77	90
		48
		8
67
		17
	60	46
		6
N		60
		11 89
L	43	10
	K
		74
		85
C		Q
		14

35

O

31

85

12		DEH-2790MP/XN/ID
1	2		3	4

	5	6					7		8
CD MECHANISM MODULE SECTION PARTS LIST
Mark No.	Description	Part No.			Mark No.			Description	Part No.
1	CD Core Unit(S10.1)	CWX3096		50			Gear		CNV8379
2	Connector(CN101)	CKS4182
3	Connector(CN901)	CKS4017		51			Gear		CNV8380
4	Screw	BMZ20P035FTC		52			Gear		CNV8381
5	Screw	BSZ20P040FTC		53			Gear		CNV8382
				54			Gear		CNV8383
6	Screw(M2x4)	CBA1362		55			Gear		CNV8384
7	Screw(M2x3)	CBA1824
8	Screw(M2x3)	CBA1825		56			Rack		CNV8385
9	•••••			57			Arm		CNV8386
10	Washer	CBF1038		58			Arm		CNV8387
				59			Guide		CNV8388
11	Washer	CBF1060		60			Roller		CNV7218
12	Spring	CBH2390
13	Spring	CBH2606		61			Gear		CNV8389
14	Spring	CBH2607		62			Arm		CNV8391
15	Spring	CBH2608		63			Arm		CNV8390
				64			Arm		CNV8392
16	Spring	CBH2609		65			Damper		CNV7313
17	Spring	CBH2610
18	Spring	CBH2735		66			Damper		CNV7314
19	Spring	CBH2612		67			Arm		CNV8394
20	Spring	CBH2613		68			Arm		CNV8395
				69			Guide		CNV8396
21	Spring	CBH2614		70			Guide		CNV8397
22	Spring	CBH2615
23	Spring	CBH2616		71			Holder		CNV8398
24	Spring	CBH2617		72			Arm		CNV8402
25	Spring	CBH2620		73			Gear		CNV8400
				74			Damper		CNV7618
26	Spring	CBH2621		75			Motor Unit(M1)		CXC4440
27	Spring	CBH2641
28	Spring	CBH2642		76			Chassis Unit		CXC2318
29	Spring	CBH2643		77			Screw Unit		CXB8729
30	Spring	CBH2659		78			Gear Unit		CXC2397
				79			Arm Unit		CXC2316
31	Spring	CBH2688		80			Arm		CND1896
32	•••••
33	Shaft	CLA4441		81			Arm		CND1894
34	Frame	CNC9962		82			Motor Unit(M2)		CXB8933
35	Frame	CNC9963		83			Bracket		CNC9985
				84			•••••
36	Bracket	CND2712		85			Screw(M2x5)		EBA1028
37	Bracket	CND1895
38	Arm	CNC9968		86			Screw		JFZ20P020FTC
39	Arm	CND1909		87			Screw		JGZ17P022FTC
40	Lever	CND2032		88			•••••
				89			Washer		YE20FTC
41	Lever	CNC9984		90			Pickup Unit(P10)(Service)		CXX1641
42	Sheet	CNM8134
43	Collar	CNV7798		91			Screw		IMS26P030FTC
44	Guide	CNV7799		92			Spring		CBL1635
45	Arm	CNV8403		93			Clamper		CNV8372
46	Rack	CNV8374
47	Holder	CNV8376
48	Holder	CNV8377
49	Arm	CNV8378
				DEH-	2790MP/XN/ID					13
	5	6						7	8

A

B

C

D

E

F

1

2

3

4

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

A

A TUNER AMP UNIT

VDD

FM/AM TUNER UNIT

7

6

13

5

10

9

8

11

14

18

19

20

21

NC

CE2

VDD

SL

DI

CK

CE1

NC

DO

NC

NC

NC

NC

ROM_

IC 3 EEPROM

IC 5

5.0V

5V

← 3.3V

OSC

LPF

B

ANTENNA

CN401

AM ANT

FMRF

1

1

ATT

2

Rch 24

IC 2

FM ANT

IC 1

2.5V

3

ATT

3.3V

Lch 23

FMRF

MIXER, IF AMP

DET, FM MPX

RF adj

ANT adj

T51

CF52

RFGND

OSCGND

AUDIOGND

VDD 3.3

IC 4

E

DGND

VCC

3.3V

3.3V

← 2.5V 2.5V

TUN L

2

NC

I

C

2

12

15

22

16

4

17

CDL

3

I

TUN 3.3V

VCC

C CD CORE UNIT(S10.1)

PICKUP UNIT

(P10)(SERVICE)

V3R3D

LASER

CN101

DIODE

LD- 15

15

Q101

142

LD

IC 201

UPD63763GJ

MD

143

CN901

CN651

5

5

PD

RF AMP, CD DECODER,

D

HOLOGRAM

AC,BD

LOUT 31

LOUT

10

14

CD L

MP3 AND WMA DECODER,

UNIT

E,F

DIGITAL SERVO/DATA PROCESSOR

FOCUS ACT.

FOP

1

1

FOP

MONITOR

TRACKING ACT.

TOP

4

4

TOP

SYSTEM C

DIODE

LD+

14

14

FD,TD

SD,MD

X701

IC 6

12

FOP

PE

13

TOP

12

13

M1

CD

X1

X2

M

MICRO

DRIVER

SPINDLE

MOTOR

16

SOP

LOEJ

22

53

COMPUTER

14

RESET

15

9

RESET

A

15

SOM

LOEJ

reset

18

M2

M

LCOP

CONT

9

47

CONT

LOADING/CARRIAGE

17

LCOM

MOTOR

IC 301

IC 701

BRST,BRXEN,BSRQ

BRST,BRXEN,BSRQ,BDATA,BSCK

BA5835FP

PE5454A

BDATA,BSCK

Q991

VD

VD

VD

3

21

B.UP

32

Q992

12EJ

4

20

3

4

E

31

8EJ

VDCONT 49

5

30

DSCSNS

2

97

HOME

VDSENS

78

VDSENS

VDCONT 19

5

VDCONT

S904

S905

S903

S901

3V REGULATOR

12EJ

8EJ

DSCSNS HOME

3VDD

3

IC 703

2

VDD

5

19

VDD

V3R3D

3

IC 203

1

VD2

S-812C33AUA-C2N

NJM2885DL1-33

VDD

3.3V REGULATOR

VD2

2

22

F

14

DEH-2790MP/XN/ID

1

2

3

4

5

6

7

8

A

CN352

REAR OUTPUT

RESET

R Lch

2

IC 961

A

RESET

VDD

Q352

S-80834CNY

60

RESET

TUNPDO

11

TUNPDI

LDET

61

LDET

TUNPDI

12

TUNPDO

SL

76

SL

TUNPCK

13 TUNPCK

VDD REGULATOR

CE1

56

TUNPCE1

Q911

CE2

55

TUNPCE2

VDD

B

Q912

SYSTEM CONTROLLER

IC 601(1/2)

32

PE5447A

DALMON

BACKUP SENSE

B.UP

CN901

64

BSENS

1

FUSE

BSENS

1

BACK UP

Q931

10A

63

ASENS

ACC

3

3

ASENS

ACC

ACC SENSE

2

2

GND

B.UP

ELECTRONIC VOLUME/

POWER AMP

20 6

TUN L

2

SOURCE SELECTOR

10

14

IN1-L

F Lch

FLIN

IC 302

FL-

23

10

10

C

FL-

IC 151

11

12

PAL007A

FL+

21

12

12

CDL

3

IN2-L

PML010A

R Lch

RLIN

RL-

3

9

9

FL+

5

RL-

RL+

11

11

RL+

22

MUTE

STBY

BREM

25

B. REMOTE

6

6

4

B.REM

VST

VCC

VDT,

MUTE

TUN 3V REG.

SYS 8V REG.

VCK,

Q452(1/2)

IC 901

Q921

TU 3.3V

B.UP

BA33BC0FP

Q923

MUTE

Q452(2/2)

MUTE

48

SYSPW

SYSPW

43

SYSPW

D

SYSTEM CONTROLLER

IC 601(2/2)

PE5447A

X1

70

X601

X2

69

12.58291MHz

B KEYBOARD UNIT

Q801

CN831

CN1801

SWVDD

VDD

5

5

SW5V

SWVDD

21

SWVDD

SOURCE

E

78

INTRQ

66

SOURCE

6

SOURCE

6

VDSENS

DSENS

65

DSENS

8

DSENS

8

Q821

ILM

B.UP

7

7

Q822

KEY MATRIX

ILMPW

22

DPDT

18

KEY DATA

X0

22

DPDT

9

4

4

DPDT

X1801

F

8

KYDT

20

LCD DRIVER/

X1

23

5MHz

KYDT

3

3

KYDT

SW5V

10

VLCD

KEY CONTROLLER

17

IC 1801

REM

LCD

56

PD6340A

VDD

5

6

DEH-2790MP/XN/ID

7

8

15

1

2

3

4

3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

Note: When ordering service parts, be sure to refer to " EXPLODED VIEWS AND PARTS LIST" or "ELECTRICAL PARTS LIST".

A								A-a
							Large size
							SCH diagram
		A-a			A-b

C CN901

A-a	A-b	Guide page
A-a	A-b	Detailed page

B

C

FM/AM TUNER UNIT

D

DEH-2770MP/XN/CS

DEH-2750MP/XN/GS DEH-2790MP/XN/ID

bsrq

AVREF1

AVDD

VSS

source

dsene

STRKEY2

BSI

BDATA

BSCK

XTALEN

brst

brxen

RECEIVE

E

F

A

16

NOTE :

Symbol indicates a resistor.

No differentiation is made between chip resistors and discrete resistors.

Symbol indicates a capacitor.

No differentiation is made between chip capacitors and discrete capacitors.

The > mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation.

1

2

Decimal points for resistor
and capacitor fixed values
are expressed as :			B
2.2	←	2R2
0.022		←R022	CN1801
DEH-2790MP/XN/ID
		3	4

5

6

7

8

		A-b		A
	TUNER AMP UNIT
A

>

B

>

CEK1208

10A BACKUP GND

ACC

B.REM

RL—

FL—

RL+

FL+

RR—

FR—

RR+

FR+

A

		DEH-	2790MP/XN/ID				17
5	6				7	8

C

D

E

F

1

2

3

A

A-b	1	2

B

C CN901

C

A-a A-b

D

E

F

A-a

4

3

dsene source

VSS

AVDD

AVREF1

bsrq

DEH-2770MP/XN/CS	DEH-2750MP/XN/GS DEH-2790MP/XN/ID

FM/AMTUNERUNIT

18		DEH-2790MP/XN/ID
1	2		3	4

	5		6	7	8
					A
3	4		5	6	A-b
	STRKEY2		RECEIVE
			brxen		B
			brst
			XTALEN
			B	CN1801
	BSI	BDATA	BSCK
					C

DEH-2750MP/XN/GS	DEH-2790MP/XN/ID	Decimal points for resistor	and capacitor fixed values	are expressed as :	←2.22R2	←0.022R022
	NOTE :	Symbol indicates a resistor.	No differentiation is made between chip resistors and	discrete resistors.	Symbol indicates a capacitor.	No differentiation is made between chip capacitors and discrete capacitors.	The > mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation.

FM/AMTU

A-a A-b

D

E

F

A-a

		DEH-	2790MP/XN/ID				19
5	6				7	8

	1	2	3	4
					BACKUP	GND	ACC	B.REM
A
				> CEK1208	10A
B
	UNIT	>
	TUNER AMP
C	A
	A-b
	A-a
D
E
F
	A-b	1	2	3
	20		DEH-2790MP/XN/ID
		2	3	4
	1

5

6

7

BACKUP	GND	ACC	B.REM	RL—	FL—	RL+	FL+	RR—	FR—	RR+	FR+
> CEK1208 10A

3 4 5 6

5	6	DEH-	2790MP/XN/ID		7

8

A

B

C

A-a A-b

D

E

F

A-b

21

8

1

2

3

4

3.3 KEYBOARD UNIT

A

B

C

D

E

F

B

22		DEH-2790MP/XN/ID
1	2		3	4