deh 2780 2750

PIONEER CORPORATION 4-1, Meguro 1-chome,PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, LonPIONEER EUROPE NV Haven 1087, Keetberglaan 1, 912PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253

PIONEER CORPORATION 2004

DEH-2750/XU/ES

Meguro-ku, Tokyo 153-8654, Japang Beach, CA 90801-1760, U.S.A.

0 Melsele, BelgiumAlexandra Road, #04-01, Singapore 159936

ORDER NO.

CRT3365

HIGH POWER CD PLAYER WITH FM/AM TUNER

DEH-2750/XU/ES

DEH-2750B/XU/ES

DEH-2750/XU/CN

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

Model No. Order No. Mech.Module Remarks

CX-3110 CRT3178 S10.1 CD Mech. Module : Circuit Description, Mech. Description, Disassembly

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

K-ZZA. NOV. 2004 Printed in Japan

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SAFETY INFORMATION

This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safelyrepair 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 soand refer the repair to a qualified service technician.

1. Safety Precautions for those who Service this Unit.

• When checking or adjusting the emitting power of the laser diode exercise caution in order to get safe, reliable

results.

Caution:

1. During repair or tests, minimum distance of 13cm from the focus lens must be kept.

2. During repair or tests, do not view laser beam for 10 seconds or longer.

2. A “CLASS 1 LASER PRODUCT” label is affixed to the

bottom of the player.

3. The triangular label is attached to the mechanism

unit frame.

4. Specifications of Laser Diode

Specifications of laser radiation fields to which human access is possible during service.Wavelength = 800 nanometers

- Service Precaution1. You should conform to the regulations governing the product (safety, radio and noise, and other 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.

DEH-2750/XU/ES21 2 3 4

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[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.

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.

3. Lubricants, Glues, and Replacement parts

Use grease and adhesives that are equal to the specified substance. Make sure the proper amount is applied.

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.

DEH-2750/XU/ES 35 6 7 8

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CONTENTS SAFETY INFORMATION..................................................................................................................................... 21. SPECIFICATIONS ............................................................................................................................................ 52. EXPLODED VIEWS AND PARTS LIST ............................................................................................................ 8

2.1 PACKING ................................................................................................................................................... 82.2 EXTERIOR............................................................................................................................................... 102.3 CD MECHANISM MODULE(DEH-2750/XU/ES, DEH-2750B/XU/ES)..................................................... 122.4 CD MECHANISM MODULE(DEH-2750/XU/CN) ..................................................................................... 14

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM.......................................................................................... 163.1 BLOCK DIAGRAM ................................................................................................................................... 163.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE).............................................................................. 183.3 KEYBOARD UNIT.................................................................................................................................... 243.4 CD MECHANISM MODULE..................................................................................................................... 26

4. PCB CONNECTION DIAGRAM ..................................................................................................................... 304.1 TUNER AMP UNIT................................................................................................................................... 304.2 KEYBOARD UNIT.................................................................................................................................... 344.3 CD CORE UNIT(S10) .............................................................................................................................. 36

5. ELECTRICAL PARTS LIST ............................................................................................................................ 386. ADJUSTMENT ............................................................................................................................................... 42

6.1 CD ADJUSTMENT................................................................................................................................... 426.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT .................................................... 446.3 ERROR MODE ........................................................................................................................................ 466.4 SYSTEM MICROCOMPUTER TEST PROGRAM ................................................................................... 47

7. GENERAL INFORMATION............................................................................................................................. 487.1 DIAGNOSIS ............................................................................................................................................. 487.1.1 DISASSEMBLY ..................................................................................................................................... 487.1.2 CONNECTOR FUNCTION DESCRIPTION.......................................................................................... 517.2 PARTS...................................................................................................................................................... 527.2.1 IC .......................................................................................................................................................... 527.2.2 DISPLAY ............................................................................................................................................... 567.3 OPERATIONAL FLOW CHART ............................................................................................................... 577.4 CLEANING............................................................................................................................................... 58

8. OPERATIONS ................................................................................................................................................ 59

DEH-2750/XU/ES41 2 3 4

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1. SPECIFICATIONS

DEH-2750/XU/ES 55 6 7 8

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DEH-2750/XU/ES61 2 3 4

DEH-2750/XU/ES 7

5 6 7 8

5 6 7 8

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2. EXPLODED VIEWS AND PARTS LIST

2.1 PACKING

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. 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.)

"

15

11

12

13

1616

10

9

8

754

2

17

18

14

DEH-2750/XU/ES81 2 3 4

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(1) PACKING SECTION PARTS LIST

(2) CONTRAST TABLEDEH-2750/XU/ES, DEH-2750B/XU/ES and DEH-2750/XU/CN are constructed the same except for the following:

Owner's Manual,Installation Manual

Mark No. Description Part No.

1 Accessory Assy CEA4850

2 Screw Assy CEA3849

3 •••••

4 Screw CBA1650

* 5 Polyethylene Bag CEG-127

6 Screw CRZ50P090FTC

7 Screw TRZ50P080FTC

* 8 Polyethylene Bag CEG-158

9 Handle CNC5395

10 Bush CNV3930

11 Polyethylene Bag CEG-162

12 Carton See Contrast table(2)

13 Contain Box See Contrast table(2)

14 Protector XHP7004

15 Protector XHP7003

16-1 Owner's Manual See Contrast table(2)

16-2 Installation Manual See Contrast table(2)

16-3 Caution Card See Contrast table(2)

* 16-4 Warranty Card See Contrast table(2)

17 Cord Assy XDE7008

18 Case Assy YXB5005


Mark No. Description DEH-2750/XU/ES DEH-2750B/XU/ES DEH-2750/XU/CN

12 Carton YHG5030 YHG5032 YHG5031

13 Contain Box YHL5030 YHL5032 YHL5031

16-1 Owner's Manual YRD5014 YRD5014 YRB5007

16-2 Installation Manual YRD5018 YRD5018 YRB5009

16-3 Caution Card CRP1310 CRP1310 Not used

* 16-4 Warranty Card Not used Not used ARY7046

Part No. Language

YRD5014 English, Spanish, Portuguese(B), Traditional Chinese, Arabic

YRD5018 English, Spanish, Portuguese(B), Traditional Chinese, Arabic

YRB5007 Casual Chinese

YRB5009 Casual Chinese

DEH-2750/XU/ES 95 6 7 8

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1 2 3 4
2.2 EXTERIOR

C

C

B

A

A

B

A

B

33

43

53

42

3536

37

32

3

2

14

5

15

54

4 4

4

7

12

2

34

3941

38

49

40

4847

4650

52

4431

31

1065

66

6160 62

57

64

63

56

5965

6555 5831

31

6

9

8

19

70

29

18

26

212022

25

23

282767

68

17

17

30

45

13

51

16

6869

712

2

DEH-2750/XU/ES101 2 3 4

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(1) EXTERIOR SECTION PARTS LIST

(2) CONTRAST TABLEDEH-2750/XU/ES, DEH-2750B/XU/ES and DEH-2750/XU/CN are constructed the same except for the following:


1 •••••

2 Screw BSZ26P060FTC



5 Cable CDE7113

6 Case CNB2793

7 Holder CNC8659

8 Earth Plate CNC8915

9 Cushion CNM8890

10 Panel See Contrast table(2)

11 •••••

12 CD Mechanism Module(S10) See Contrast table(2)

13 Cord Assy XDE7008

14 Insulator XNM7106

15 Insulator YNM5012

16 Tuner Amp Unit See Contrast table(2)

17 Screw ASZ26P060FTC

18 Screw BPZ26P080FTC


> 20 Fuse(10A) CEK1208

21 Pin Jack(CN352) CKB1057

22 Plug(CN901) CKM1376

23 Connector(CN721) CKS3835

24 •••••


26 Antenna Jack(CN401) CKX1056

27 Holder CND1328

28 Heat Sink CNR1668

29 Holder CND1054

30 Holder YNC5004

31 Screw BPZ20P100FZK

32 Spring CBH2210

33 Knob(VOLUME) See Contrast table(2)

34 Button(DETACH) YAC5027

35 Button(SOURCE) YAC5030

36 Button(1-6, LOCAL/BSM) YAC5031

37 Button(AUDIO, LOUDNESS) YAC5032

38 Button(BAND) YAC5033

39 Button(EJECT, PAUSE) YAC5034

40 Button(DOWN, RIGHT) See Contrast table(2)

41 Button(UP, LEFT) See Contrast table(2)

42 Button(CLOCK, EQ) YAC5039

43 Spring YBL5001

44 Cover YNS5038


46 Sheet CNM7932

47 Connector CNV7369

48 LCD(LCD1801) See Contrast table(2)

49 Holder YNC5005

50 Lighting Conductor YNV5004

51 Lighting Conductor YNV5005

52 Rubber Contact YNV5006

53 Grille Unit See Contrast table(2)

54 Chassis Unit YXA5080

55 Button(DETACH) CAC4836

56 Spring CBH1835

57 Spring CBH2208

58 Spring CBH2367

59 Bracket CNC6791

60 Holder CNC8042

61 Cover CNM6276

62 Arm CNV4692

63 Arm CNV4728

64 Arm CNV5576

65 Screw IMS20P030FZK

66 Panel YNS5046

67 IC(IC921) NJM2388F84

68 Transistor(Q911, 991) 2SD2396

69 IC(IC302) PAL007A

70 FM/AM Tuner Unit(Z401) CWE1646

71 Sheet See Contrast table(2)


Mark No. Description DEH-2750/XU/ES DEH-2750B/XU/ES DEH-2750/XU/CN

10 Panel YNS5045 YNS5045 CNS8046

12 CD Mechanism Module(S10) CXK5601 CXK5601 CXK5604

16 Tuner Amp Unit YWM5051 YWM5055 YWM5053

33 Knob(VOLUME) YAA5002 YAA5002 YAA5001

40 Button(DOWN, RIGHT) YAC5038 YAC5038 YAC5035

41 Button(UP, LEFT) YAC5037 YAC5037 YAC5036

48 LCD(LCD1801) YAW5045 YAW5031 YAW5045

53 Grille Unit YXA5073 YXA5075 YXA5074

71 Sheet Not used Not used CNM9404

DEH-2750/XU/ES 115 6 7 8

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1 2 3 4
2.3 CD MECHANISM MODULE(DEH-2750/XU/ES, DEH-2750B/XU/ES)

A

D

H

L

M

NO

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R

A

B

C

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F

GH

I

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N

O

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16

25

13 83

42

68

28

82

4

71

23

J

K

38

23

59

87

86

5

13

34

5

5

13

44

5C

52

53

36

4

73

29

51

18

64

76

50

10

72

75

49

77

67

27

78

60

9048

8

17

46

6

60

1189

43

70

14

31

65

85

66

85

31

35

14

74

85

1

23

R

91

12

33

61

63

21

79

57

58

6280

13

4

86

I

45

28

724

47

P

41

20

40

69

39

30P

1956

F

E22

81

15

G

26

5

54

37

55

93

92

10

C

1GEM10242GEM10453GEM1035

1

1

1

1

1

1

1

1

2

2

2

2

1

1

1

1

1

2

2

1

3

DEH-2750/XU/ES121 2 3 4

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CD MECHANISM MODULE(DEH-2750/XU/ES, DEH-2750B/XU/ES) SECTION PARTS LIST


1 CD Core Unit(S10) CWX3110



4 Screw BMZ20P035FTC


6 Screw(M2x4) CBA1362



9 •••••

10 Washer CBF1038

11 Washer CBF1060

12 Spring CBH2390

13 Spring CBH2606

14 Spring CBH2607

15 Spring CBH2608

16 Spring CBH2609

17 Spring CBH2610

18 Spring CBH2735

19 Spring CBH2612

20 Spring CBH2613

21 Spring CBH2614

22 Spring CBH2615

23 Spring CBH2616

24 Spring CBH2617

25 Spring CBH2620

26 Spring CBH2621

27 Spring CBH2641

28 Spring CBH2642

29 Spring CBH2643

30 Spring CBH2659

31 Spring CBH2688

32 •••••

33 Shaft CLA4441

34 Frame CND2443

35 Frame CNC9963

36 Bracket CND2712

37 Bracket CND1895

38 Arm CNC9968

39 Arm CND1909

40 Lever CND2032

41 Lever CNC9984

42 Sheet CNM8134

43 Collar CNV8447

44 Guide CNV8448

45 Arm CNV8403

46 Rack CNV8374

47 Holder CNV8376

48 Holder CNV8377

49 Arm CNV8378

50 Gear CNV8379

51 Gear CNV8380

52 Gear CNV8381

53 Gear CNV8382

54 Gear CNV8383

55 Gear CNV8384

56 Rack CNV8385

57 Arm CNV8386

58 Arm CNV8387

59 Guide CNV8388

60 Roller CNV8189

61 Gear CNV8389

62 Arm CNV8391

63 Arm CNV8390

64 Arm CNV8392

65 Damper CNV7313

66 Damper CNV7314

67 Arm CNV8394

68 Arm CNV8395

69 Guide CNV8396

70 Guide CNV8397

71 Holder CNV8398

72 Arm CNV8402

73 Gear CNV8400

74 Damper CNV7618

75 Motor Unit(M1) CXC4440

76 Chassis Unit CXC2318

77 Screw Unit CXB8729

78 Gear Unit CXC2397

79 Arm Unit CXC2316

80 Arm CND1896

81 Arm CND1894

82 Motor Unit(M2) CXB8933

83 Bracket CNC9985

84 •••••

85 Screw(M2x5) EBA1028

86 Screw JFZ20P020FTC

87 Screw JGZ17P022FTC

88 •••••

89 Washer YE20FTC

90 Pickup Unit(P10)(Service) CXX1647

91 Screw IMS26P030FTC

92 Spring CBL1635

93 Clamper CNV8372


DEH-2750/XU/ES 135 6 7 8

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1 2 3 4
2.4 CD MECHANISM MODULE(DEH-2750/XU/CN)

A

D

H

L

M

NO

Q

R

A

B

C

D

E

F

GH

I

J

K

LM

N

O

Q

B

16

25

13 83

42

68

28

82

4

71

23

J

K

38

23

59

87

86

5

13

34

5

5

13

44

5C

52

53

36

4

73

29

51

18

64

76

50

10

72

75

49

77

67

27

78

60

9048

8

17

46

6

60

1189

43

70

14

31

65

85

66

85

31

35

14

74

85

1

23

R

91

12

33

61

63

21

79

57

58

6280

13

4

86

I

45

28

724

47

P

41

20

40

69

39

30P

1956

F

E22

81

15

G

26

5

54

37

55

93

92

10

C

1GEM10242GEM10453GEM1035

1

1

1

1

1

1

1

1

2

2

2

2

1

1

1

1

1

2

2

1

3

DEH-2750/XU/ES141 2 3 4

C

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A

B

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5 6 7 8

CD MECHANISM MODULE(DEH-2750/XU/CN) SECTION PARTS LIST


1 CD Core Unit(S10) CWX3110



4 Screw BMZ20P035FTC





9 •••••

10 Washer CBF1038

11 Washer CBF1060

12 Spring CBH2390

13 Spring CBH2606

14 Spring CBH2607

15 Spring CBH2608

16 Spring CBH2609

17 Spring CBH2610

18 Spring CBH2735

19 Spring CBH2612

20 Spring CBH2613

21 Spring CBH2614

22 Spring CBH2615

23 Spring CBH2616

24 Spring CBH2617

25 Spring CBH2620

26 Spring CBH2621

27 Spring CBH2641

28 Spring CBH2642

29 Spring CBH2643

30 Spring CBH2659

31 Spring CBH2688

32 •••••

33 Shaft CLA4441

34 Frame CND2443

35 Frame CNC9963

36 Bracket CND2712

37 Bracket CND1895

38 Arm CNC9968

39 Arm CND1909

40 Lever CND2032

41 Lever CNC9984

42 Sheet CNM8134

43 Collar CNV8447

44 Guide CNV8448

45 Arm CNV8403

46 Rack CNV8374

47 Holder CNV8376

48 Holder CNV8377

49 Arm CNV8378

50 Gear CNV8379

51 Gear CNV8380

52 Gear CNV8381

53 Gear CNV8382

54 Gear CNV8383

55 Gear CNV8384

56 Rack CNV8385

57 Arm CNV8386

58 Arm CNV8387

59 Guide CNV8388

60 Roller CNV8189

61 Gear CNV8389

62 Arm Unit CXC3865

63 Arm Unit CXC3864

64 Arm CNV8392

65 Damper CNV7313

66 Damper CNV7314

67 Arm CNV8394

68 Arm CNV8395

69 Guide CNV8396

70 Guide CNV8397

71 Holder CNV8398

72 Arm CNV8402

73 Gear CNV8400

74 Damper CNV7618

75 Motor Unit(M1) CXC4440

76 Chassis Unit CXC2318

77 Screw Unit CXB8729

78 Gear Unit CXC2397

79 Arm Unit CXC2316

80 Arm CND1896

81 Arm CND1894

82 Motor Unit(M2) CXB8933

83 Bracket CNC9985

84 •••••

85 Screw(M2x5) EBA1028

86 Screw JFZ20P020FTC

87 Screw JGZ17P022FTC

88 •••••

89 Washer YE20FTC

90 Pickup Unit(P10)(Service) CXX1647

91 Screw IMS26P030FTC

92 Spring CBL1635

93 Clamper CNV8372


DEH-2750/XU/ES 155 6 7 8

C

D

F

A

B

E

2

E

L

3

SYSTEM

ICP

I/BSI

NT/NC

EJ/NC

CSENS

CONT/BRSQ

SENS

1 2 3 4

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM3.1 BLOCK DIAGRAM

CN701CN101Q101

M

LASERDIODE

MONITORDIODE

HOME

X201

12EJ 8EJ DSCSNS

FOCUS ACT.

SPINDLEMOTOR

MCARRIAGEMOTOR

LOADING/

TRACKING ACT.

LD+

MD

FOP

TOP

14

5

4

1

PICKUP UNIT(P10)(SERVICE)

HOLOGRAM UNIT

IC 301BA5835FP

IC 201UPD63712AGC

IC 701

NJM2391DL1-33

3.3V REGULATOR

SERVO CONTROL,

DSP,LPF, DAC

ACT,MOTORDRIVER

1VD

VD

3R3V

7CONT

5LOEJ

6DSCSNS

8LOUT

TOP

FOP

16SOP

15SOM

17LCOM

18LCOP 22

1

LOEJ

23

20LOUT

XTAL

xtal

24

9CONT

12FOP

FD, TD, SD, MD

AC, F, E, BD

1LD

2PD

42LIMIT

3

13TOP

D CD CORE UNIT(S10)C

2

16SO12 XSI

3R3V

TUN

CDL

CN4011

2

CN721

TUNER AMP UNIT

CD L

A

TUN 3.3V

SYS 8V

VDD

ANTENNA

FM/AM TUNER UNIT

16IC 721TC7SET08FU

29

28

XSI

79DSCSNS

CDLOEJ

CONT

42XS

CO

LO

DS

14

6

16

17

15

B.UP

78

54 3

415

Q991

VDSENS

VD

VD

20

21Q992

FMRF

ANT adjRF adj

FM ANT

T51 CF52CF51

RF

GN

D

OS

CG

ND

DG

ND

AU

DIO

GN

D

NC

VC

C

VD

D_3

.3

3.3V 2.5VIC 4

3.3V 2.5V

←

IC 22.5V

WC

CE

2

RO

M_V

DD SL DI

CK

CE

1

NC

DO

NC

NC

NC

NC

7 6 13 5 10 9 8 11 14 18 19 20 21

1

3

2 12 15 22 16 4 17

IC 13.3V

AM ANT FMRFATT

LPFOSC

IC 3 EEPROM5.0V

IC 55V 3.3V←

ATT

MIXER, IF AMP DET, FM MPX

24

23

Rch

Lch

DEH-2750/XU/ES161 2 3 4

C

D

F

A

B

E

16

29

28

79

78

41

5 6 7 8

11R Lch

IN1-L

IN2-L

2

IC 151PML003AM

ELECTRONIC VOLUME/SOURCE SELECTOR

TUN L

3CDL

10F Lch

IC 1801PD6340A

LCD DRIVER/KEY CONTROLLER

KEY DATA

LCD1801

KEY MATRIX

60

BSENS

ASENS

VDD

B.UP

63

64

48MUTE

21

3

5

FL-

FL+

RL-

RL+

B. REM

ACC

RLIN12

22

4

POWER AMP

REAR OUTPUT

IC 601(1/2)PE5462A

SYSTEM CONTROLLER

IC 601(2/2)PE5462A

IC 961S-80834CNY

IC 302PAL007A

VDD

Q911

Q931

SYSPW

SY

SP

W

VDD

SWVDD

STBYMUTE

3

5

CN1801CN831Q801

KEYBOARD UNIT

VC

K, V

DT

, VS

T

6

7

43SYSPW

Q452

Q453

MUTE

B.UP

Q821

18

20

DPDT

KYDT

MUTE

SYSTEM CONTROLLER

VDD REGULATOR

BACKUP SENSE

ACC SENSE

B

CN901

TUNPCE1

TUNPCE2

TUNPDI

RE

SE

T

TUNPDO

56

55

11

12

TUNPCK13

TUNPDO

TU 3.3V

TUN 3V REG.

IC 921NJM2388F84

B.UP

SYS 8V REG.

TUNPDI

CE1

CE2

TUNPCK

Q912

DALMON32

B.UP

8V

20

4

8

10

9

3

5

6

7

4

8

10

9

SOURCE

VOLUME

LAMP IL1801

SWVDDSWVDD

SRC

DSENS

ILM

ROT1

ROT0

DPDT

KYDT

S1827

SWVDD21

SOURCE66

DSENSE65

ILMPW22

ROT136

ROT035

DPDT9

KYDT8

R Lch

CN352

2

FLIN14

IC 981BA33BC0FP

Q822

DSENSE

SOURCE

SWVDD

BSENS

ASENS

X1

X2

70

X60112.58291MHz69

XO

XI

21

X18015MHz22

Q352

RESET

23

B. REM 25

FL-

FL+

RL-RL+

3

9

11

12

10

1

6

3

9

11

12

10

1

6

2 2

BACK UP

GND

FUSE

10A

ACC

B. REM

XSI/BSI

CONT/NC

LOEJ/NC

DSCSENS

VDCONT/BRSQ

VDSENS

DEH-2750/XU/ES 175 6 7 8

C

D

F

A

B

E
1 2 3 4
3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

A-a A-b

A-a A-b

A-b A-a

Large sizeSCH diagram

Guide page

Detailed page

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

A-a

A

Symbol indicates a resistor.No differentiation is made between chip resistors anddiscrete resistors.

NOTE :

Symbol indicates a capacitor.No differentiation is made between chip capacitors anddiscrete capacitors.

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

For resistors and capacitors in the circuit diagrams, their resistance values or capacitance values are expressed in codes:

Ex. *Resistors Code Practical value 123 12k ohms 103 10k ohms

BCN1801

C CN701

FM

/AM

TU

NE

R U

NIT

SYSTEM CONTROLLER

ANTENNA

E.VOL.

12.5

8291

MH

z

as

en

s

bs

en

s

ds

en

s

so

ur

ce

sw

vd

d

*Capacitors Code Practical value 103 0.01uF 101/10 100uF/10V

FM:-19.5dBsAM: -30dBs

CD:+0.35dBs

DEH-2750/XU/ES181 2 3 4

C

D

F

A

B

E

A-a A-b

A-a A-b

A-b A-a

VOL.

as

en

s

bs

en

s

5 6 7 8

A-b

A

3300

/16

CE

K12

863A

600µH

>

A TUNER AMP UNIT

CEK120810A

>

REAR L CH

REAR R CHFM: +3.6dBsAM: -6.9dBsCD:+10.45dBs

FM: +29.6dBsAM: +19.1dBsCD:+36.45dBs

DEH-2750/XU/ES 195 6 7 8

C

D

F

A

B

E

SY

ST

EM

CO

NT

RO

LLE

R

1 2 3 4

A-a

A-b

A-a

A-a

A-b 1 2

CC

N70

1

E.V

OL.

12.58291MHz

asens

bsens

dsens

source

FM

:-19

.5dB

sA

M:

-30

dBs

CD

:+0.

35dB

s

DEH-2750/XU/ES201 2 3 4

C

D

F

A

B

E

ens

ens

ens

rce

FM

:-19

.5dB

sA

M:

-30

dBs

5 6 7 8

A-a

A-b

A-a

A-a

A-b3

Sym

bol i

ndic

ates

a r

esis

tor.

No

diffe

rent

iatio

n is

mad

e b

etw

een

chip

res

isto

rs a

nddi

scre

te r

esis

tors

.

NO

TE

: Sym

bol i

ndic

ates

a c

apac

itor.

No

diffe

rent

iatio

n is

mad

e b

etw

een

chip

cap

acito

rs a

nddi

scre

te c

apac

itors

.

The

> m

ark

foun

d on

som

e co

mpo

nent

par

ts in

dica

tes

the

impo

rtan

ce o

f the

saf

ety

fact

or o

f the

par

t.T

here

fore

, whe

n re

plac

ing,

be

sure

to u

se p

arts

of

iden

tical

des

igna

tion.

For

res

isto

rs a

nd c

apac

itors

in th

e ci

rcui

t dia

gram

s,

thei

r re

sist

ance

val

ues

or c

apac

itanc

e va

lues

are

exp

ress

ed in

cod

es:

Ex.

*R

esis

tors

C

ode

Pra

ctic

al v

alue

1

23

12k

ohm

s

103

1

0k o

hms

BC

N18

01

FM/AM TUNER UNITS

YS

TE

M C

ON

TR

OLL

ER

AN

TE

NN

A

as

bs

ds

sou

swvdd

*C

apac

itors

C

ode

P

ract

ical

val

ue

103

0.

01uF

1

01/1

0

100u

F/1

0V

DEH-2750/XU/ES 215 6 7 8

C

D

F

A

B

E

1 2 3 4

A-a

A-b

A-b 1 2

3300/16

CEK12863A

>

AT

UN

ER

AM

P U

NIT

RE

AR

L C

H

RE

AR

R C

H

L.

FM

: +

3.6d

Bs

AM

:

-6.9

dBs

CD

:+10

.45d

Bs

FM

: +2

9.6d

Bs

AM

: +1

9.1d

Bs

CD

:+36

.45d

Bs

DEH-2750/XU/ES221 2 3 4

C

D

F

A

B

E

5 6 7 8

A-a

A-b

A-b3

600µ

H

CE

K12

0810

A >

DEH-2750/XU/ES 235 6 7 8

C

D

F

A

B

E
1 2 3 4
3.3 KEYBOARD UNIT

B

A,C : YAW5045 B : YAW5031

5MHz

DEH-2750/XU/ES241 2 3 4

C

D

F

A

B

E

5 6 7 8

B

40mA,14V

DEH-2750/XU/ESDEH-2750B/XU/ESDEH-2750/XU/CN

ABC

model

A,C

: S

ML-

310P

T

B :

SM

L-31

0VT

A,C : CEL1651(GREEN) B : CEL1662(VW RED)

A,C : 151 B : 221

A,C : 181 B : 331

A,C : 151 B : 331

AC

N83

1

B KEYBOARD UNIT

DEH-2750/XU/ES 255 6 7 8

C

D

F

A

B

E

3

1 2 3 4

3.4 CD MECHANISM MODULE

C

PICKUP UNIT(P10)(SERVICE)

M1CXC4440

SPINDLE MOTOR

M2CXB8933

LOADING/CARRIAGE MOTOR

3.3VREGULATOR

MOTOR DRIVER

F F

F F

T T

T T

F

F

T

T

T

F

S

C

F

F

T

T

S S C C

S

S

C

C

T

T

F

F

T

T

F

F

1

7

8

6

5

@

9

0

!

#

DEH-2750/XU/ES261 2 3 4

C

D

F

A

B

E

C C

6

5

@

5 6 7 8

C

7.5V

7.5V

SWITCHES:CD CORE UNIT(S10) S901:HOME SWITCH..........ON-OFF S903:DSCSNS SWITCH......ON-OFF S904:12EJ SWITCH.............ON-OFF S905:8EJ SWITCH...............ON-OFF

The underlined indicates the switch position.

CD CORE UNIT(S10)CA

CN721

RF AMP / SERVO / DSPDAC / LPF F

SIGNAL LINE

FOCUS SERVO LINE

TRACKING SERVO LINE

CARRIAGE SERVO LINE

SPINDLE SERVO LINE

T

C

S

S C T F

3

$%

4

2

9

DEH-2750/XU/ES 275 6 7 8

C

D

F

A

B

E

1 2 3 4

- Waveforms Note : 1. The encircled numbers denote measuring points in the circuit diagram.2. Reference voltage REFO1(1.65V)

1 DSCSNS2 CLCONT3 LOEJ4 VD

5V/div5V/div5V/div10V/div

500ms/div

When loading a 12cm CD

Ref.:GND

Mode:Normal

5 SIN6 CIN7 TIN

1V/div500mV/div500mV/div

2s/div

When setting up after loading a 12cm CD-DA disc

Ref.:REFO

Mode:Normal

1 DSCSNS2 CLCONT3 LOEJ4 VD


500ms/div

When loading an 8cm CD

Ref.:GND

Mode:Normal

@ MDX5 SIN

500mV/div1V/div

5ms/div

Spindle waveform during "Play"

Ref.:REFO

Mode:Normal

# RFAGC 500mV/div 0.5µs/div

Ref.:REFO

Mode:Normal

@ MDX5 SIN

500mV/div1V/div

5µs/div

Spindle waveform during "Play"(Magnified) RF eye pattern

Ref.:REFO

Mode:Normal

8 FIN! FE

500mV/div500mV/div

200ms/div

Focus Search

Ref.:REFO

Mode:TEST

# RFAGC0 TE7 TIN


500µs/div

Ref.:REFO

Mode:TEST

0 TE# RFAGC

500mV/div500mV/div

2ms/div

When "Tracking Open" 1 Track Jump

Ref.:REFO

Mode:TEST

8 FIN9 RFOK5 SIN

200mV/div2V/div2V/div

500ms/div

When setting up "Source On"(12cm CD-DA) During "Play"(CD-DA)

Ref.:REFO

Mode:Normal

! FE8 FIN0 TE7 TIN

500mV/div500mV/div500mV/div500mV/div

20ms/div

Ref.:REFO

Mode:Normal

0 TE! FE

500mV/div500mV/div

200ms/div

When setting up "Source On"

Ref.:REFO

Mode:Normal

DEH-2750/XU/ES281 2 3 4

C

D

F

A

B

E

5 6 7 8

# RFAGC0 TE7 TIN


500ms/div

32 Track Jump

Ref.:REFO

Mode:TEST

# RFAGC7 TIN0 TE8 FIN


500µs/div

Ref.:REFO

Mode:Normal

# RFAGC0 TE7 TIN


5ms/div

100(32x3) Track Jump When reproducing black dots(1mm)

Ref.:REFO

Mode:TEST

$ LOUT% ROUT

1V/div1V/div

200µs/div

Analog Audio

Ref.:AGND

Mode:Normal

1 DSCSNS2 CLCONT3 LOEJ

5V/div5V/div5V/div

200ms/div

Ref.:GND

Mode:Normal

1 DSCSNS2 CLCONT3 LOEJ

5V/div5V/div5V/div

200ms/div

When "Eject"(12cm CD) When "Eject"(8cm CD)

Ref.:GND

Mode:Normal

# RFAGC0 TE6 CIN5 SIN

1V/div1V/div500mV/div2V/div

500µs/div

When reproducing scratch(1mm)During inside/outside search(outer circumference → inner circumference)

Ref.:REFO

Mode:Normal



500µs/div

Ref.:REFO

Mode:Normal



5ms/div

When reproducing fingerprint(65µm)

Ref.:REFO

Mode:Normal

DEH-2750/XU/ES 295 6 7 8

C

D

F

A

B

E
1 2 3 4
4. PCB CONNECTION DIAGRAM4.1 TUNER AMP UNIT

CapacitorConnector

P.C.Board Chip Part

A

A TUNER AMP UNIT

SIDE B

SIDE A

NOTE FOR PCB DIAGRAMS1.The parts mounted on this PCB include all necessary parts for several destination. For further information for respective destinations, be sure to check with the schematic diagram.2.Viewpoint of PCB diagrams

C CN701

CORD ASSY

1

1

2

3 2

3

4

5

6

7

8

11

12

13

14

15

16

9

10

DEH-2750/XU/ES301 2 3 4

C

D

F

A

B

E

SSY

11

12

13

140

5 6 7 8

A

SIDE A

B CN1801

FRONT

RCAANTENNA

FM

/AM

TU

NE

R U

NIT

15 1

1

2

42 3

16

DEH-2750/XU/ES 315 6 7 8

C

D

F

A

B

E

CL

1 2 3 4

A

A TUNER AMP UNIT

1

1

P

TEST

DEH-2750/XU/ES321 2 3 4

C

D

F

A

B

E

EST

5 6 7 8

A

SIDE B

1

PCL

1

DEH-2750/XU/ES 335 6 7 8

C

D

F

A

B

E
1 2 3 4
4.2 KEYBOARD UNIT

B

B KEYBOARD UNIT SIDE A

CLO

CK

EQ

VO

LUM

E

SO

UR

CE

12

BA

ND

43

6

LOC

AL/

BS

M

5D

OW

N

LOU

DN

ES

S

PA

US

E

RIG

HT

LEF

T

AU

DIO

EJE

CT

UP

LCD1801

DEH-2750/XU/ES341 2 3 4

C

D

F

A

B

E

5 6 7 8

B

B KEYBOARD UNIT SIDE B

A CN831

DEH-2750/XU/ES 355 6 7 8

C

D

F

A

B

E

1 2 3 4

4.3 CD CORE UNIT(S10)

C

C CD CORE UNIT(S10) SIDE A

ACN721

PIC

KU

P U

NIT

(P10

)(S

ER

VIC

E)

M2LOADING

/CARRIAGEMOTOR

M1SPINDLEMOTOR

E

REFO1

F

HOME

DEH-2750/XU/ES361 2 3 4

C

D

F

A

B

E

5 6 7 8

C

C CD CORE UNIT(S10) SIDE B

12EJ8EJ

DSCSNS

3 2 1

DEH-2750/XU/ES 375 6 7 8

C

D

F

A

B

E

1 2 3 4

5. ELECTRICAL PARTS LIST

NOTE:• Parts whose parts numbers are omitted are subject to being not supplied.• The part numbers shown below indicate chip components. Chip Resistor RS1/_S___J,RS1/__S___J Chip Capacitor (except for CQS.....) CKS....., CCS....., CSZS.....• The > mark found on some component parts indicatesthe importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation.

Circuit Symbol and No. Part No.

AUnit Number:YWM5051(DEH-2750/XU/ES)Unit Number:YWM5055(DEH-2750B/XU/ES)Unit Number:YWM5053(DEH-2750/XU/CN)Unit Name:Tuner Amp Unit

MISCELLANEOUS

IC 151 (B,132,80) IC PML003AMIC 302 (A,93,132) IC PAL007AIC 601 (B,85,52) IC PE5462AIC 721 (B,45,20) IC TC7SET08FUIC 921 (A,6,119) IC NJM2388F84

IC 961 (A,46,62) IC S-80834CNYIC 981 (B,146,27) IC BA33BC0FPQ 352 (B,159,125) Transistor IMH3AQ 452 (B,140,115) Transistor DTC124EUQ 453 (B,135,107) Transistor DTA124EU

Q 801 (B,28,25) Transistor 2SA1036KQ 821 (B,20,29) Transistor 2SA1036KQ 822 (B,17,33) Transistor DTC114EUQ 911 (A,6,100) Transistor 2SD2396Q 912 (B,17,64) Transistor IMD2A

Q 931 (B,70,86) Transistor IMX1Q 991 (A,6,66) Transistor 2SD2396Q 992 (B,25,50) Transistor IMD2AD 831 (A,139,18) Diode 1SS133D 832 (A,122,23) Diode 1SS133

D 833 (A,114,24) Diode 1SS133D 834 (A,111,19) Diode 1SS133D 835 (A,113,10) Diode 1SS133D 836 (A,126,25) Diode 1SS133D 837 (A,134,21) Diode 1SS133

D 838 (A,119,18) Diode 1SS133D 839 (A,117,18) Diode 1SS133D 840 (A,118,15) Diode 1SS133D 841 (A,116,15) Diode 1SS133D 842 (A,130,25) Diode 1SS133

D 901 (A,69,113) Diode S5688GD 902 (A,72,110) Diode S5688GD 911 (A,30,78) Diode S5688GD 912 (A,18,60) Diode HZS6L(B2)D 931 (A,55,93) Diode HZS7L(C3)

D 932 (A,60,91) Diode HZS7L(A1)D 971 (A,60,104) Diode S5688GD 972 (A,57,104) Diode S5688GD 991 (A,13,48) Diode HZS7L(C3)L 151 (A,141,79) Inductor LAU2R2K

L 401 (A,155,55) Inductor LAU1R0KL 402 (A,155,92) Inductor LAU1R0KL 404 (A,155,99) Ferri-Inductor LAU4R7KL 601 (A,64,64) Ferri-Inductor LAU100KL 801 (A,28,15) Inductor LAU2R2K

L 901 (A,35,103) Choke Coil 600µH CTH1280X 601 (A,101,61) Radiator 12.58291MHz CSS1402>FU352 (B,140,136) Fuse 3A CEK1286AR401 (A,159,119) Surge Protector DSP-201M-S00BZ 401 (A,163,100) FM/AM Tuner Unit CWE1646

> Fuse 10A CEK1208

RESISTORS

R 153 (B,127,104) RS1/16S471JR 154 (B,147,93) RS1/16S471JR 155 (B,127,102) RS1/16S471JR 156 (B,136,94) RS1/16S471JR 157 (B,84,79) RAB4C102J

R 301 (A,100,96) RD1/4PU153JR 353 (B,141,122) RS1/16S471JR 354 (B,163,125) RS1/16S471JR 357 (B,145,130) RS1/16S223JR 358 (B,160,134) RS1/16S223J

R 405 (B,158,62) RS1/16S681JR 407 (B,159,83) RS1/16S681JR 408 (B,159,85) RS1/16S681JR 409 (B,159,86) RS1/16S681JR 410 (B,159,88) RS1/16S681J

R 414 (B,156,88) RS1/16S0R0JR 420 (B,105,44) RS1/16S681JR 421 (B,159,79) RS1/16S473JR 454 (B,133,114) RS1/16S103JR 455 (B,141,132) RS1/16S153J

R 456 (B,139,132) RS1/16S221JR 457 (A,120,54) RD1/4PU681JR 601 (B,102,49) RS1/16S473JR 602 (B,102,51) RS1/16S473JR 603 (B,63,75) RS1/16S103J

R 604 (B,60,75) RS1/16S103JR 605 (B,84,21) RS1/16S0R0JR 606 (B,110,41) RS1/16S104J


DEH-2750/XU/ES381 2 3 4

C

D

F

A

B

E

5 6 7 8

R 607 (A,110,51) RD1/4PU222JR 608 (B,104,63) RS1/16S0R0J

R 609 (A,102,47) RD1/4PU473JR 610 (A,129,44) RD1/4PU681JR 611 (B,105,50) RS1/16S473JR 612 (B,111,14) RS1/16S104JR 613 (B,107,24) RS1/16S473J

R 633 (B,65,40) RS1/16S104JR 721 (B,80,23) RS1/16S221JR 729 (B,54,57) RS1/16S0R0JR 730 (A,74,38) RD1/4PU102JR 731 (A,77,33) RD1/4PU102J

R 732 (B,110,43) RS1/16S0R0JR 733 (A,80,33) RD1/4PU102JR 736 (A,98,34) RD1/4PU221JR 737 (B,56,24) RS1/16S221JR 738 (B,94,38) RS1/16S221J

R 741 (B,50,17) RS1/16S221JR 751 (B,55,21) RS1/16S0R0JR 801 (B,24,27) RS1/16S153JR 802 (B,28,20) RS1/16S153JR 803 (B,13,36) RS1/16S222J


R 837 (A,128,21) RD1/4PU103JR 838 (A,113,44) RD1/4PU102JR 841 (B,15,28) RS1/16S1R0JR 848 (A,100,41) RD1/4PU102JR 851 (A,97,41) RD1/4PU102J


R 858 (A,127,27) RD1/4PU102JR 911 (B,11,68) RS1/16S223JR 912 (A,14,68) RD1/4PU152JR 923 (B,10,110) RS1/16S473JR 931 (B,62,92) RS1/16S473J

R 932 (B,65,85) RS1/16S104JR 933 (A,54,99) RD1/4PU102JR 934 (B,64,95) RS1/16S473JR 935 (B,64,92) RS1/16S473JR 936 (B,70,89) RS1/16S473J


R 981 (A,136,38) RD1/4PU1R8JR 991 (A,13,53) RD1/4PU271JR 992 (A,18,50) RD1/4PU121JR 993 (B,30,62) RS1/16S272JR 994 (B,30,56) RS1/16S472J

CAPACITORS

Circuit Symbol and No. Part No.C 151 (B,159,71) CKSRYB224K16C 152 (B,159,73) CKSRYB224K16C 153 (B,122,74) CKSRYB105K10C 154 (B,145,82) CKSRYB105K10C 155 (A,121,78) CEJQ4R7M35

C 156 (A,143,88) CEJQ4R7M35C 157 (B,123,85) CKSRYB153K50C 158 (B,143,95) CKSRYB153K50C 161 (B,125,99) CCSRCH100D50C 162 (B,139,94) CCSRCH100D50

C 163 (B,131,95) CCSRCH100D50C 164 (B,139,96) CCSRCH100D50C 165 (B,140,70) CKSRYB104K16C 166 (A,135,66) CEJQ470M10C 167 (A,124,66) CEJQ100M16

C 301 (A,135,111) CFTNA224J50C 302 (A,145,119) CFTNA224J50C 303 (A,130,111) CFTNA224J50C 304 (A,143,125) CFTNA224J50C 309 (B,135,136) CKSQYB225K10

C 310 (B,122,143) CKSQYB225K10C 312 (A,100,118) CEJQ100M16C 313 (B,40,122) CKSRYB104K16C 353 (A,132,102) CEJQ2R2M50C 354 (A,140,102) CEJQ2R2M50

C 401 (B,164,67) CKSRYB103K50C 402 (B,153,56) CKSRYB103K50C 403 (A,150,53) CEJQ470M6R3C 404 (A,153,87) CEJQ101M10C 405 (B,166,94) CKSRYB104K25

C 420 (B,112,68) CCSRCH470J50C 451 (A,134,131) CEJQ330M10C 601 (B,54,64) CKSRYB104K25C 604 (B,97,64) CCSRCH200J50C 605 (B,101,64) CCSRCH200J50

C 610 (A,94,71) CEJQ4R7M35C 611 (B,97,68) CKSRYB224K16C 728 (B,42,19) CKSRYB104K16C 801 (B,11,36) CKSRYB104K16C 901 (A,46,121) 3300µF/16V CCH1494

C 911 (A,16,76) CEJQ470M10C 912 (B,12,64) CKSRYB103K50C 913 (A,25,86) 470µF/16V CCH1331C 921 (A,14,115) CEJQ101M16C 922 (A,18,107) CEJQ221M10

C 923 (B,18,110) CKSRYB103K50C 924 (B,17,101) CKSRYB103K50C 961 (B,50,66) CKSRYB473K50C 963 (A,46,69) CEJQ100M16C 982 (B,145,40) CKSRYB103K50

C 983 (A,147,35) CEJQ220M16C 991 (B,20,50) CKSRYB473K50C 992 (A,26,60) CEJQ101M16

BUnit Number:(DEH-2750/XU/ES)Unit Number:(DEH-2750/XU/CN)Unit Name:Keyboard Unit


DEH-2750/XU/ES 395 6 7 8

C

D

F

A

B

E

1 2 3 4

MISCELLANEOUS

IC 1801 (B,29,96) IC PD6340AD 1801 (B,19,40) Diode MA152WKD 1802 (B,24,40) Diode MA152WAD 1803 (A,25,38) LED CL-490S-WF-SDD 1804 (A,25,128) LED CL-490S-WF-SD

D 1805 (A,13,22) LED SML-310PTD 1806 (A,26,9) LED SML-310PTD 1807 (A,30,27) LED SML-310PTD 1808 (A,39,50) LED SML-310PTD 1809 (A,5,10) LED SML-310PT

D 1810 (A,34,9) LED SML-310PTD 1811 (A,39,84) LED SML-310PTD 1812 (A,39,73) LED SML-310PTD 1813 (A,39,61) LED SML-310PTD 1814 (A,39,96) LED SML-310PT

D 1815 (A,39,107) LED SML-310PTD 1816 (A,39,119) LED SML-310PTD 1817 (A,39,35) LED SML-310PTD 1818 (A,39,131) LED SML-310PTX 1801 (B,37,83) Ceramic Resonator 5.00MHz CSS1547

S 1827 (A,23,19) Switch(VOLUME) YSD5002IL 1801 (B,23,147) Lamp 40mA,14V CEL1651LCD1801 (A,16,45) LCD YAW5045

RESISTORS





R 1821 (B,27,25) RS1/16S151JR 1831 (B,33,23) RS1/16S472JR 1832 (B,35,23) RS1/16S472JR 1834 (B,14,21) RS1/16S473J

CAPACITORS

C 1802 (B,27,52) CKSRYF104Z25C 1811 (A,25,32) CKSRYF104Z25C 1812 (A,20,129) CKSRYF104Z25

BUnit Number:(DEH-2750B/XU/ES)


Unit Name:Keyboard Unit

MISCELLANEOUS

IC 1801 (B,29,96) IC PD6340AD 1801 (B,19,40) Diode MA152WKD 1802 (B,24,40) Diode MA152WAD 1803 (A,25,38) LED CL-490S-WF-SDD 1804 (A,25,128) LED CL-490S-WF-SD

D 1805 (A,13,22) LED SML-310VTD 1806 (A,26,9) LED SML-310VTD 1807 (A,30,27) LED SML-310VTD 1808 (A,39,50) LED SML-310VTD 1809 (A,5,10) LED SML-310VT

D 1810 (A,34,9) LED SML-310VTD 1811 (A,39,84) LED SML-310VTD 1812 (A,39,73) LED SML-310VTD 1813 (A,39,61) LED SML-310VTD 1814 (A,39,96) LED SML-310VT

D 1815 (A,39,107) LED SML-310VTD 1816 (A,39,119) LED SML-310VTD 1817 (A,39,35) LED SML-310VTD 1818 (A,39,131) LED SML-310VTX 1801 (B,37,83) Ceramic Resonator 5.00MHz CSS1547

S 1827 (A,23,19) Switch(VOLUME) YSD5002IL 1801 (B,23,147) Lamp 40mA,14V CEL1662LCD1801 (A,16,45) LCD YAW5031

RESISTORS





R 1821 (B,27,25) RS1/16S221JR 1831 (B,33,23) RS1/16S472JR 1832 (B,35,23) RS1/16S472JR 1834 (B,14,21) RS1/16S473J

CAPACITORS

C 1802 (B,27,52) CKSRYF104Z25C 1811 (A,25,32) CKSRYF104Z25C 1812 (A,20,129) CKSRYF104Z25

C


DEH-2750/XU/ES401 2 3 4

C

D

F

A

B

E

5 6 7 8

Unit Number:CWX3110Unit Name:CD Core Unit(S10)

MISCELLANEOUS

IC 201 (A,35,25) IC UPD63712AGCIC 301 (A,45,81) IC BA5835FPIC 701 (B,53,56) IC NJM2885DL1-33Q 101 (B,22,12) Transistor 2SA1577X 201 (A,45,36) Ceramic Resonator 16.934MHz CSS1603

S 901 (A,15,44) Switch(HOME) CSN1067S 903 (B,53,101) Switch(DSCSNS) CSN1068S 904 (B,35,109) Switch(12EJ) CSN1067S 905 (B,48,110) Switch(8EJ) CSN1067

RESISTORS

R 101 (B,26,13) RS1/10SR2R4JR 102 (B,28,15) RS1/10SR2R4JR 103 (B,29,12) RS1/10SR2R7JR 201 (A,58,26) RS1/16SS102JR 214 (A,23,28) RS1/16SS332J

R 215 (A,21,27) RS1/16SS183JR 216 (A,24,19) RS1/16SS122JR 217 (A,22,15) RS1/16SS562JR 218 (A,24,16) RS1/16SS472JR 235 (A,27,44) RS1/16SS103J

R 236 (A,31,46) RS1/16SS103JR 301 (A,54,73) RS1/16SS183JR 302 (A,54,70) RS1/16SS822JR 303 (A,45,70) RS1/16SS183JR 304 (A,47,69) RS1/16SS822J

R 305 (A,34,75) RS1/16SS183JR 306 (A,32,69) RS1/16SS183JR 307 (A,38,74) RS1/16SS183JR 308 (A,36,67) RS1/16SS183JR 601 (B,52,43) RS1/16SS101J

R 602 (B,46,42) RS1/16SS101JR 603 (B,48,48) RS1/16SS0R0JR 901 (B,48,103) RS1/16SS104JR 902 (B,46,105) RS1/16SS473JR 903 (B,44,106) RS1/16SS273J

CAPACITORS

C 103 (B,13,8) 100µF/16V CCH1504C 109 (A,34,12) CKSSYB104K10C 201 (A,45,19) CKSSYB104K10C 202 (A,53,21) CKSSYB102K50C 205 (B,37,36) 22µF/6.3V CCH1507

C 206 (B,40,30) CKSSYB103K16C 207 (A,46,30) CKSSYB104K10C 209 (A,46,31) CKSSYB104K10C 210 (A,41,35) CKSSYB104K10C 211 (A,33,35) CKSSYB104K10

C 213 (A,21,29) CKSSYB103K16C 214 (A,23,26) CKSSYB104K10C 215 (A,25,23) CKSSYB104K10C 216 (A,24,21) CKSSYB103K16C 217 (A,21,18) CCSSCH560J50

C 218 (A,24,14) CCSSCH5R0C50C 219 (A,28,14) CKSSYB104K10

Circuit Symbol and No. Part No.C 220 (B,27,24) CKSSYB104K10C 221 (B,41,21) CKSSYB104K10C 222 (A,35,12) CKSSYB103K16

C 223 (A,37,14) CCSSCH680J50C 224 (A,45,11) CCSSCH470J50C 225 (A,46,14) CKSSYB103K16C 231 (A,30,43) CKSSYB102K50C 232 (B,38,64) CKSSYB102K50

C 301 (B,37,74) 100µF/16V CCH1504C 302 (A,54,71) CKSSYB221K50C 303 (A,45,68) CKSSYB221K50C 304 (A,33,73) CKSSYB472K25C 305 (A,36,74) CKSSYB103K16

C 306 (B,45,94) CKSSYB104K10C 501 (B,45,51) CKSSYB103K16C 502 (A,61,68) CKSSYB103K16C 703 (B,47,61) CKSQYB104K16C 704 (B,54,63) CKSQYB105K10

Miscellaneous Parts List

Pickup Unit(P10)(Service) CXX1647M 1 Motor Unit(SPINDLE) CXC4440M 2 Motor Unit(LOADING/CARRIAGE) CXB8933


DEH-2750/XU/ES 415 6 7 8

C

D

F

A

B

E

1 2 3 4

6. ADJUSTMENT6.1 CD ADJUSTMENT

1) Cautions on adjustments• In this product the single voltage (3.3V) is used for the regulator. The reference voltage is the REFO1 (1.65V) instead of the GND.If you should mistakenly short the REFO1 with the GND during adjustment, accurate voltage will not be obtained, and the servo’s misoperation will apply excessive shock to the pickup. To avoid such problems:a. Do not mix up the REFO1 with the GND when connecting the (-) probe of measuring instruments. Especially on an oscilloscope, avoid connecting the (-) probe for CH1 to the GND. b. In many cases, measuring instruments have the same potential as that for the (-) probe. Be sure to set the measuring instruments to the floating state.c. If you have mistakenly connected the REFO1 to the GND, turn off the regulator or the power immediately.

• Before mounting and removing filters or leads for adjustment, be sure to turn off the regulator.

• For stable circuit operation, keep the mechanism operating for about one minute or more after the regulator is turned on.

• In the test mode, any software protections will not work. Avoid applying any mechanical or electrical shock to the mechanism during adjustment.

• The RFI and RFO signals with a wide frequency range are easy to oscillate. When observing the signals, insert a resistor of 1k ohms in series.

• The load and eject operation is not guarantied with the mechanism upside down. If the mechanism is blocked due to mistaken eject operation, reset the product or turn off and on the ACC to restore it.

2) Test modeThis mode is used to adjust the CD mechanism module.• To enter the test mode.While pressing the 4 and 6 keys at the same time, reset.• To exit from the test mode.Turn off the ACC and back up.

Notes:a. During ejection, do not press any other keys than the EJECT key until the loaded disc is ejected.b. If you have pressed the (→) key or (←) key during focus search, turn off the power immediately to protect the actuator from damage caused by the lens stuck.c. For the TR jump modes except 100TR, the track jump operation will continue even if the key is released.d. For the CRG move and 100TR jump modes, the tracking loop will be closed at the same time when the key is released.e. When the power is turned off and on, the jump mode is reset to the single TR (91), the RF amp gain is set to 0dB, and the auto-adjustment values are reset to the default settings.

DEH-2750/XU/ES421 2 3 4

C

D

F

A

B

E

5 6 7 8

[BAND]

[BAND]

[BAND]

[BAND]

[BAND]

Power On(T.Offset is adjusted)

TRK00 MIN00 SEC00

[CD]or[SOURCE]

Source On

TRK MIN

[4]+[6]+Reset

Test Mode In

[3]

[1]

[1]

Power On(T.Offset is not adjusted)

TRK99 MIN99 SEC99

[2]

[2]

[2]

[2]

Power Off

TRK MIN SEC

Power Off

TRK MIN SEC

Power Off

TRK MIN SEC

Power Off

TRK MIN SEC

Focus Close /S curve check

TRK91 MIN91 SEC91

[6] [1]

[3]

[6]

[3]

Focus Mode switching

*2

TRK0xMIN0xSEC0x

Tracking ServoClose

TRK00 MIN00 SEC00or TRK99 MIN99 SEC99

CRG- *8


[→] [←]

[→] [←]

[→] [←]

CRG+ *8


Automatic adjustment display switching

*3

TRK?? MIN?? SEC??

T.Close and F,T AGCand RF AGC

Applicable servomechanismTRKxx MINxx SECxx

[6]

[3]

T.Close andApplicable servomechanism

TRKxx MINxx SECxx

RF AGC /RF AGC coefficient display

TRK?? MIN?? SEC??

CRG+

TRK8x MIN8x SEC8xor TRK9xMIN9xSEC9x

CRG-

TRK8xMIN8xSEC8xor TRK9xMIN9xSEC9x

T.Balance adjustmentT.Balance coefficient display

TRK?? MIN?? SEC??

F,T,RF AGC /F.Bias display switching

*7

TRK?? MIN?? SEC??

F,T AGC /F.BiasRF AGC

TRKxx MINxx SECxx

CRG/TR Jump value *5

switching

TRKxx MINxx SECxx

CRG/TR Jump +*4

TRK xx MINxx SEC xx

CRG/TR Jump - *4

*6

TRK xx MIN xx SEC xx

Tracking Open

TRK8xMIN8xSEC8xor TRK 9xMIN9xSEC 9x

Tracking Open

TRK8x MIN8x SEC8xor TRK9xMIN9xSEC9x

[Key]

[BAND]

[→]

[6]

[1]

[2]

[3]

-

-

Power On / Off

CRG + / TR Jump + (Direction of the external surface)

CRG - / TR Jump - (Direction of the internal surface)

CLS and AGC and Applicable servomechanism /AGC, AGC display switching

RF Gain switching / Offset adjustment display /T.Balance adjustment / T.Open

Close, S.Curve /

SPDL 1X / 2X switching(Double-speed compatibility only)

Gop measurement

Forcus Mode switching / Tracking Close/ CRG, TR Jump switching

Test Mode

Operation

[KEY]

Contents

Display

Rough Servo and RF AGC / F, T, RF AGC

*1) TYP → -12dB TRK MIN SEC TRK 12 MIN 12 SEC 12

*2) Focus Close → S.Curve → F EQ measurement setting TRK 00 MIN 00 SEC 00 TRK 01 MIN 01 SEC 01 TRK 02 MIN 02 SEC 02 (TRK 99 MIN 99 SEC 99)

*3) F.Offset Display → RF.Offset Display → T.Offset Display

*4) 1TR/32TR/100TR

*5) Single TR → 32TR → 100TR → CRG Move 9x(8x) : 91(81) 92(82) 93(83) 94(84)

*6) Only at the time of CRG Move or 100TR Jump*7) TRK/MIN/SEC → F.AGC → T.AGC Gain → F.bias → RF AGC

*8) CRG motor voltage = 2[V]

[←]

- Flow Chart

DEH-2750/XU/ES 435 6 7 8

C

D

F

A

B

E

1 2 3 4

6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT

• Note :The grating angle of the PU unit cannot be adjusted after the PU unit is changed. The PU unit in the CD mechanism module is adjusted on the production line to match the CD mechanism module and is thus the best adjusted PU unit for the CD mechanism module. Changing the PU unit is thus best considered as a last resort. However, if the PU unit must be changed, the grating should be checked using the procedure below.

• Purpose :To check that the grating is within an acceptable range when the PU unit is changed.

• Symptoms of Mal-adjustment :If the grating is off by a large amount symptoms such as being unable to close tracking, being unable to perform track search operations, or taking a long time for track searching.

• Method :

• Measuring Equipment• Measuring Points

• Oscilloscope, Two L.P.F.• E, F, REFO1

• Disc • TCD-782• Mode • TEST MODE

• Checking Procedure1. In test mode, load the disc and switch the 3V regulator on.2. Using the → and ← buttons, move the PU unit to the innermost track.3. Press key 3 to close focus, the display should read "91". Press key 2 to implement the tracking balance adjustment the display should now read "81". Press key 3. The display will change, returning to "81" on the fourth press.4. As shown in the diagram above, monitor the LPF outputs using the oscilloscope and check that the phase difference is within 75° . Refer to the photographs supplied to determine the phase angle.5. If the phase difference is determined to be greater than 75° try changing the PU unit to see if there is any improvement. If, after trying this a number of times, the grating angle does not become less than 75° then the mechanism should be judged to be at fault.• NoteBecause of eccentricity in the disc and a slight misalignment of the clamping center the grating waveform may be seen to "wobble" ( the phase difference changes as the disc rotates). The angle specified above indicates the average angle.

• HintReloading the disc changes the clamp position and may decrease the "wobble".

100kΩ

390pF

100kΩ

390pF

E

VREF

F

VREF

Xch Ych

L.P.F.

L.P.F.

RE

FO1

F E

CD CORE UNIT(S10)

Oscilloscope

DEH-2750/XU/ES441 2 3 4

C

D

F

A

B

E

5 6 7 8

Grating waveform

45°

0°

75°

60°

30°

90°

Ech → Xch 20mV/div, ACFch → Ych 20mV/div, AC

DEH-2750/XU/ES 455 6 7 8

C

D

F

A

B

E

1 2 3 4

6.3 ERROR MODE

- Error Messages

If a CD is not operative or stopped during operation due to an error, the error mode is turned on and cause(s) of the error is indicated with a corresponding number. This arrangement is intended at reducing nonsense calls from the users and also for facilitating trouble analysis and repair work in servicing.

(1) Basic Indication Method

1) When SERRORM is selected for the CSMOD (CD mode area for the system), error codes are written to DMIN (minutes display area) and DSEC (seconds display area). The same data is written to DMIN and DSEC. DTNO remains in blank as before.

2) Head unit display examples

Depending on display capability of LCD used, display will vary as shown below. xx contains the error number.

8-digit display 6-digit display 4-digit display

ERROR–xx ERR–xx E–xx

(2) Error Code List

Code Class Displayed error code Description of the code and potential cause(s)

10 Electricity Carriage Home NG CRG can't be moved to inner diameter.

SERVO LSI Com- CRG can't be moved from inner diameter.

munication Error → Failure on home switch or CRG move mechanism.

Communication error between microcomputer and SERVO LSI.

11 Electricity Focus Servo NG Focusing not available.

→ Stains on rear side of disc or excessive vibrations on REWRITABLE.

12 Electricity Spindle Lock NG Spindle not locked. Sub-code is strange (not readable).

Subcode NG → Failure on spindle, stains or damages on disc, or excessive vibrations.

A disc not containing CD-R data is found.

Turned over disc are found, though rarely.

CD signal error.

17 Electricity Setup NG AGC protection doesn't work. Focus can be easily lost.

→ Damages or stains on disc, or excessive vibrations on REWRITABLE.

30 Electricity Search Time Out Failed to reach target address.

→ CRG tracking error or damages on disc.

44 Electricity ALL Skip Skip setting for all track.

(CD-R/RW)

50 Mechanism CD On Mech Error Mechanical error during CD ON.

→ Defective loading motor, mechanical lock and mechanical sensor.

A0 System Power Supply NG Power (VD) is ground faulted.

→ Failure on SW transistor or power supply (failure on connector).

Remarks: Mechanical errors are not displayed (because a CD is turned off in these errors).

Unreadable TOC does not constitute an error. An intended operation continues in this case.

Upper digits of an error code are subdivided as shown below:

1x: Setup relevant errors, 3x: Search relevant errors, Ax: Other errors.

DEH-2750/XU/ES461 2 3 4

C

D

F

A

B

E

5 6 7 8

6.4 SYSTEM MICROCOMPUTER TEST PROGRAM

- PCL OutputIn the normal operation mode (with the detachable panel installed, the ACC switched ON, the standby mode cancelled), shift the TESTIN (Pin 15) terminal to H. The clock signal is output from the PCL terminal (Pin 14). The frequency of the clock signal is 786.432kHz that is one 16th of the fundamental frequency. The clock signal should be 786.432kHz ± 31.5Hz. If the clock signal is out of the range, the X'tal (X601) should be replaced with new one.

DEH-2750/XU/ES 475 6 7 8

C

D

F

A

B

E

1 2 3 4

7. GENERAL INFORMATION7.1 DIAGNOSIS7.1.1 DISASSEMBLY

- Removing the CD Mechanism Module (Fig.1)

1

Fig.1

- Removing the Case (not shown)

Grille Assy

- Removing the Grille Assy (Fig.1)

1. Remove the Case.

CD Mechanism Module

1

1

1

1

Fig.2Tuner Amp Unit

- Removing the Tuner Amp Unit (Fig.2)

Remove the screw.1

Remove the four screws.

Disconnect the connector and then remove theCD Mechanism Module.

2 Release the two latchs and then removethe Grille Assy.

2 2

1

22

2

3 33

Remove the three screws.2

Straighten the tabs at three locationsindicated and then remove theTuner Amp Unit.

3

DEH-2750/XU/ES481 2 3 4

C

D

F

A

B

E

5 6 7 8

- How to hold the Mechanism Unit1. Hold the top and bottom frame.2. Do not squeeze top frame's front portion too tight, because it is fragile.

- Removing the Upper and Lower Frames1. With a disc clamped, remove the four springs (A), the two springs (B), the two springs (C), and the four screws.2. To remove the upper frame, open it on the fulcrum A.3. While lifting the carriage mechanism, remove the three dampers.4. With the frames removed, insert the connectors coming from the main unit and eject the disc.Caution: Before installing the carriage mechanism in the frames, be sure to apply some alcohol to the dampers and set the mechanism to the clamp mode.

Do not squeeze.

Lower FrameDamper

Carriage Mechanism

A

C

A

B

B

Damper

Damper

C

A

A

A

Upper Frame

DEH-2750/XU/ES 495 6 7 8

C

D

F

A

B

E

1 2 3 4

- Removing the Pickup Unit1. Apply shorting solder to the Pickup flexible cable. Disconnect the cable.2. Set the mechanism to the clamp mode.3. Remove the lead wires from the inner holder.4. Remove the washer, styling holder, change arm, and pickup lock arm.5. While releasing from the hook of the inner holder, lift the end of the feed screw.Caution: In assembling, move the planet gear to the load/eject position before setting the feed screw in the inner holder.

Shorting Solder

Planet Gear

Change Arm

Inner Holder

Styling Holder

Feed Screw

Washer

Pickup Lock Arm

DEH-2750/XU/ES501 2 3 4

C

D

F

A

B

E

5 6 7 8

7.1.2 CONNECTOR FUNCTION DESCRIPTION

Pin No.12345678

B.UPGNDACCNCNCB.REMNCNC

Pin No.9

10111213141516

RL-FL-RL+FL+RR-FR-RR+FR+

ANTENNA JACK REAR OUTPUT

10A

16 2115

1413

1211

109

87

65

43

DEH-2750/XU/ES 515 6 7 8

C

D

F

A

B

E

1 2 3 4

7.2 PARTS7.2.1 IC

Pin No.1

2, 34

5, 6789

101112131415161718

19, 202122232425262728293031323334

35, 3637383940414243

44, 454647484950515253545556575859606162

Function and OperationModel select inputNot usedGNDNot usedVDDDisplay microcomputer data inputDisplay microcomputer communication data outputA/D converter power supply outputPLL data inputPLL data outputPLL clock outputClock adjustment outputTest program inputCD LSI serial data inputCD LSI serial data outputCD LSI serial clock outputNot usedDisplay microcomputer chip select outputIllumination power outputNot usedCD LSI reset control outputCD LSI command data control outputCD LSI strobe outputCD LSI ceramic oscillator oscillation outputDriver outputLoad/eject outputDriver control outputNot usedOutput for dark current reduction circuitGNDTEL mute inputRotary volume input 0, 1ROM collection data outputROM collection clock outputROM collection chip select outputRDS decoder receiving output (Not used)VD outputNot usedSystem power outputNot usedWired remote control inputIllumination inputSystem mute outputAuto antenna control outputNot usedE.VOL strobe outputE.VOL data outputE.VOL clock outputNot usedPLL chip enable output 2PLL chip enable outputRDS LK input (Not used)RDS clock input (Not used)RDS 57K input (Not used)ResetPLL lock detection inputRDS clock input

Pin NameMODEL1NCAVSSNCAVREF1KYDTDPDTADPWTUNPDITUNPDOTUNPCKPCLTESTINXSIXSOXSCKNCswvddILMPWNCXRSTXA0XSTBXTALENCONTLOEJCLCONTNCDALMONVSSTELINROT0, 1ROMDATAROMCLKROMCSRECEIVEVDCONTNCSYSPWNCSTRKEY2isensMUTEANTPWNCVSTVDTVCKNCTUNPCE2TUNPCERDTRDSLKRDS57KRESETLDETRCK

I/OI

IOOIOOOIIOO

OO

OOOOOOO

O

IIOOOOO

O

IIOO

OOO

OOIII

II

- Pin Functions(PE5462A)

DEH-2750/XU/ES521 2 3 4

C

D

F

A

B

E

5 6 7 8

20

21 40

41

60

6180

1

* PE5462A

Pin No.636465666768

69, 7071727374757677787980

Pin NameasensbsensdsenssourceVSSVDDX2, 1IC(VPP)NCVSSAVDDAVREF1SLTEMPVDSENSDISCSENSSTRKEY1

I/OIIII

IIIII

Function and OperationACC sense inputBack up sense inputGrille detach sense inputSource sense inputGNDVDDCrystal oscillator connection pinGNDNot usedVSSVDDVDDSignal level inputTemperature detection inputVD power supply short circuit inputDISC loading detection inputWired remote control input

IC's marked by * are MOS type.Be careful in handling them because they are very liable to be damaged by electrostatic induction.

BA33BC0FP

-

+

Vref

321VCCNCOUT

Vref

OCP TSD

DEH-2750/XU/ES 535 6 7 8

C

D

F

A

B

E

1 2 3 4

- Pin Functions(PD6340A)Pin No. Pin Name I/O Function and Operation

1-5 SEG4-0 O LCD segment output6-9 COM3-0 O LCD common output 10 VLCD LCD drive power supply

11-14 KST3-0 O Key strobe output15,16 KDT0,1 I Key data input (analogue input)

17 REW I Remote control reception input18 DPDT I Display data input19 NC Not used20 KYDT O Key data output21 MODA GND22 X0 Crystal oscillator connection pin23 X1 Crystal oscillator connection pin24 VSS GND

25,26 KDT2,3 I Key data input27 NC Not used28 KST4 O Key strobe output

29-32 NC Not used33-55 SEG35-13 O LCD segment output

56 VDD Power supply57-64 SEG12-5 O LCD segment output

* PD6340A

NJM2388F84 NJM2885DL1-33

49

48 33

32

17

161

64

1 2 3

VD

D

GN

D

5 4

VO

UT

N.C

.

N.C

.

Vref

IN

1

GND

2

OUT

3

BandgapReference

ThermalProtection

+-

DEH-2750/XU/ES541 2 3 4

C

D

F

A

B

E

5 6 7 8

No. Symbol I/O Explain1 AMANT I AM antenna input AM antenna input high impedance AMANT pin is connected with

an all antenna by way of 4.7µH. (LAU type inductor) A series circuit including an inductor and a resistor is connected with RF ground for the countermeasure against the hum of power transmission line.

2 RFGND RF ground Ground of antenna block3 FMANT I FM antenna input Input of FM antenna 75Ω Surge absorber(DSP-201M-S00B) is necessary.4 VCC power supply The power supply for analog block. D.C 8.4V ± 0.3V5 SL O signal level Output of FM/AM signals level6 CE2 I chip enable-2 Chip enable for EEPROM ”Low” active7 WC I write control You can write EEPROM, when EEPROM write control is “Low”.

Ordinary non connection8 CE1 I chip enable-1 Chip enable for AF•RF ”High” active9 CK I clock Clock

10 DI I data in Data input11 NC non connection Not used12 OSCGND osc ground Ground of oscillator block13 ROM_VDD power supply Power supply for EEPROM pin 13 is connected with a power supply of

micro computer.14 DO O data out Data output15 DGND digital ground Ground of digital block16 NC non connection Not used17 VDD_3.3 power supply The power supply for digital block. 3.3V ± 0.2V18 NC non connection Not used19 NC non connection Not used20 NC non connection Not used21 NC non connection Not used22 AUDIOGND audio ground Ground of audio block23 L ch O L channel output FM stereo “L-ch” signal output or AM audio output 24 R ch O R channel output FM stereo “R-ch” signal output or AM audio output

FMRF

ANT adjRF adj

FM ANT

T51 CF52CF51

RFG

ND

OS

CG

ND

DG

ND

AU

DIO

GN

D

NC

VC

C

VD

D_3

.3

3.3V 2.5VIC 4

3.3V 2.5V

←

IC 22.5V

WC

CE

2

RO

M_V

DD SL DI

CK

CE

1

NC

DO

NC

NC

NC

NC

7 6 13 5 10 9 8 11 14 18 19 20 21

1

3

2 12 15 22 16 4 17

IC 13.3V

AM ANT FMRFATT

LPFOSC

IC 3 EEPROM5.0V

IC 55V 3.3V←

ATT

MIXER, IF AMP DET, FM MPX

24

23

Rch

Lch

- FM/AM Tuner Unit

DEH-2750/XU/ES 555 6 7 8

C

D

F

A

B

E

1 2 3 4

7.2.2 DISPLAY

- LCD(YAW5045)(DEH-2750/XU/ES, DEH-2750/XU/CN)- LCD(YAW5031)(DEH-2750B/XU/ES)

SE

GM

EN

T

CO

MM

ON

DEH-2750/XU/ES561 2 3 4

C

D

F

A

B

E

5 6 7 8

7.3 OPERATIONAL FLOW CHART

AVREF1, VDD, AVDD=5VPin 7, 68, 74, 75

Power ON

bsens=L

asens=L

bsensPin 64

asensPin 63

swvdd←LPin 21

Source keys operative

Completes power-on operation.(After that, proceed to each source operation.)

SYSPW←HPin 43

Starts communication with Grille microcomputer.

Source ON

300ms

300ms

In case of the above signal, the communication with Grille microcomputer may fail.If the time interval is not 300msec, the oscillator may be defective.

DEH-2750/XU/ES 575 6 7 8

C

D

F

A

B

E

1 2 3 4

7.4 CLEANING

Before shipping out the product, be sure to clean the following portions by using the prescribed cleaning tools:

Portions to be cleaned Cleaning tools

CD pickup lenses Cleaning liquid : GEM1004

Cleaning paper : GED-008

DEH-2750/XU/ES581 2 3 4

C

D

F

A

B

E

5 6 7 8

8. OPERATIONS

DEH-2750/XU/ES 595 6 7 8

C

D

F

A

B

E

1 2 3 4

About the fixing screws for the front panelIf you do not operate the Detaching and Replacingthe Front Panel Function, use the supplied fixingscrews and fix the front panel to this unit.

Fixing screw(CXX1066)

Fixing screw(CXX1066)

DEH-2750/XU/ES601 2 3 4

C

D

F

A

B

E

5 6 7 8

- Connection Diagram

+ ≠+ ≠

+ ≠+ ≠+ ≠

+ ≠

Vio

let

With

a2

spea

ker

syst

em,d

ono

tco

nnec

tan

ythi

ngto

the

spea

ker

lead

sth

atar

eno

tcon

nect

edto

spea

kers

.

rR

easp

eake

r

Rig

ht

Rea

rsp

eake

r

Vio

let/b

lack

Gra

y/bl

ack

Fron

tsp

eake

r

Gra

yW

hite

Whi

te/b

lack

Gre

en

Gre

en/b

lack

Left

Fron

tsp

eake

r

Rea

rsp

eake

rR

ear

spea

ker

Syst

emre

mot

eco

ntro

l

Con

nect

ing

cord

sw

ithR

CA

pin

plug

s(s

old

sepa

rate

ly)

Pow

eram

p(s

old

sepa

rate

ly)

Fuse

Blu

e/w

hite

Tosy

stem

cont

rol

term

inal

ofth

epo

wer

amp

orA

uto-

ante

nna

rela

yco

ntro

lter

min

al(m

ax.3

00m

A12

VD

C).

Thi

sPr

oduc

t

Rea

rou

tput Ant

enna

jack

Yel

low

Tote

rmin

alal

way

ssu

pplie

dw

ith

pow

erre

gard

less

ofig

nitio

nsw

itch

posi

tion.

Red

Toel

ectr

icte

rmin

alco

ntro

lled

byig

nitio

nsw

itch

(12

VD

C)

ON

/OFF

.

Bla

ck(g

roun

d)To

vehi

cle

(met

al)

body

.

Perf

orm

thes

e co

nnec

tions

whe

n us

ing

the

optio

nal a

mpl

ifie

r.

DEH-2750/XU/ES 615 6 7 8

C

D

F

A

B

E

1 2 3 4

- Jigs List

Test DiscL.P.F.

TCD-782 Checking the gratingg g gChecking the grating g g g (Two pieces)( )

Name Jig No. Remarks

DEH-2750/XU/ES621 2 3 4

deh 2780 2750

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