PIONEER DEH-P4750MP, DEH-P4770MP, DEH-P4790MP Service Manual

ORDER NO.

CRT3401

DEH-P4750MP/XM/GS

MULTI-CD CONTROL HIGH POWER CD/MP3/WMA PLAYER WITH FM/AM TUNER

DEH-P4750MP

DEH-P4790MP DEH-P4770MP

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

/XM/ID /XM/CS

/XM/GS

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. DEC. 2004 Printed in Japan

1234

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 safely

A

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.

CAUTION

Danger of explosion if battery is incorrectly replaced.

B

Replaced only with the same or equivalent type recommended by the manufacture. Discord used batteries according to the manufacture's instructions.

- Service Precaution

1. 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.

C

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.

D

E

F

2

1234

DEH-P4750MP/XM/GS

5678

[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.

A

B

C

D

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.

56

DEH-P4750MP/XM/GS

E

F

7

8

3

1234

1. SPECIFICATIONS

A

B

C

D

E

56

DEH-P4750MP/XM/GS

F

7

8

5

1234

A

B

C

D

E

F

6

1234

DEH-P4750MP/XM/GS

5678

A

B

C

D

E

56

DEH-P4750MP/XM/GS

F

7

8

7

N

1234

2. EXPLODED VIEWS AND PARTS LIST

OTES : • 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.)

2.1 PACKING

B

"

C

D

E

F

8

1234

DEH-P4750MP/XM/GS

5678

(1) PACKING SECTION PARTS LIST

Mark No. Description Part No.

1 Polyethylene Bag CEG-162 2 Cord Assy XDE7008 3 Accessory Assy CEA4850 4 ••••• 5 Screw Assy CEA3849

6 ••••• 7 Screw CBA1650 * 8 Polyethylene Bag CEG-127 9 Screw CRZ50P090FTC 10 Screw TRZ50P080FTC

* 11 Polyethylene Bag CEG-158 12 Handle CNC5395 13 •••••

Mark No. Description Part No.

14 ••••• 15 Bush CNV3930

16 Remote Control Unit CXC3173 * 17 Battery CEX1065 18 Carton See Contrast table(2) 19 Contain Box See Contrast table(2) 20 Protector XHP7003

21 Protector XHP7004 22-1 Owner's Manual See Contrast table(2) 22-2 Installation Manual See Contrast table(2) 22-3 Caution Card CRP1310 23 Case Assy CXB3520

(2) CONTRAST TABLE

DEH-P4750MP/XM/GS, DEH-P4790MP/XM/ID and DEH-P4770MP/XM/CS are constructed the same except for the following:

Mark No. Description DEH-P4750MP/XM/GS DEH-P4790MP/XM/ID DEH-P4770MP/XM/CS

18 Carton CHG5424 CHG5428 CHG5425 19 Contain Box CHL5424 CHL5428 CHL5425 22-1 Owner's Manual CRD3949 CRD3949 CRD3951 22-2 Installation Manual CRD3950 CRD3950 CRD3952

Owner's Manual,Installation Manual

A

B

C

Part No. Language

CRD3949 English, Traditional Chinese, Arabic CRD3950 English, Traditional Chinese, Arabic CRD3951 English, Spanish, Portuguese(B) CRD3952 English, Spanish, Portuguese(B)

D

E

56

DEH-P4750MP/XM/GS

F

7

8

9

1234

2.2 EXTERIOR

A

B

C

D

E

F

10

1234

DEH-P4750MP/XM/GS

5678

(1) EXTERIOR SECTION PARTS LIST

Mark No. Description Part No.

1 Screw BMZ30P040FZK 2 Screw BSZ26P060FTC 3 Screw BSZ30P060FTC 4 Screw BSZ30P200FTC 5 Cable CDE7189

6 Case CNB2793 7 Earth Plate CNC8915 8 Insulator CNM7682 9 Cushion CNM8890 10 Tuner Amp Unit See Contrast table(2)

11 Screw ASZ26P060FTC 12 Screw BPZ26P080FTC 13 Screw BSZ26P160FTC > 14 Fuse(10A) CEK1208 15 FM/AM Tuner Unit CWE1646

16 Holder CND1054 17 Pin Jack(CN351) See Contrast table(2) 18 Plug(CN981) CKM1376 19 Connector(CN101) CKS3408 20 Plug(CN831) CKS3537

21 Connector(CN721) CKS3837 22 ••••• 23 Antenna Jack(CN401) CKX1056 24 Holder CND1352 25 Heat Sink CNR1668

26 Terminal(CN402) VNF1084 27 Holder See Contrast table(2) 28 Insulator XNM7031 29 Holder Unit CXB6681 30 Chassis Unit CXB9528

31 Remote Control Unit CXC3173 32 Cover CNS7068 33 Detach Grille Assy See Contrast table(2) 34 Screw BPZ20P100FZK 35 Button(SOURCE) CAC9008

36 Button(BAND) CAC9009 37 Spring CBL1470 38 LCD(LCD1) See Contrast table(2) 39 Connector(CN1) CKS5207 40 Holder CND2510

41 Sheet CNM9287 42 Lighting Conductor CNV8274 43 Connector CNV8275 44 Cushion XNM7049 45 Sub Grille Assy See Contrast table(2)

46 Knob(VOLUME) XAA7021 47 Button(CLOCK) See Contrast table(2) 48 Button(DISPLAY) See Contrast table(2) 49 Button(LOUDNESS) See Contrast table(2)

Mark No. Description Part No.

50 Button(OPEN) See Contrast table(2)

51 Button(1-6) XAC7070 52 Button(FUNCTION, AUDIO, EQ) XAC7071 53 Spring XBH7001 54 Cover XNS7087 55

56 Button(EJECT) CAC7752 57 Screw(M2x4.5) CBA1647 58 Screw(M2x4) CBA1649 59 Washer CBF1038 60 Spring CBH2650

61 Spring CBH2651 62 Spring CBH2652 63 Spring CBH2653 64 Holder CND1254 65 Gear CNV5997

66 Arm CNV7400 67 Arm CNV7401 68 Arm CNV7402 69 Arm CNV7403 70 Panel Unit CWM9781

71 Socket(CN1950) CKS3550 72 Connector(CN1951) CKS4806 73 Holder Unit CXB9501 74 Holder Unit CXB9502 75 Damper Unit CXB9503

76 Sub Panel Unit XXA7361 77 Cover CNM6854 78 Lighting Conductor CNV6487 79 Spring CBL1512 80 Pin CNV6486

81 82 Screw ISS26P055FTC 83 Cord Assy XDE7008 84 Insulator XNM7100 85 Insulator XNM7106

86 Panel XNS7088 87 Sheet See Contrast table(2) 88 Choke Coil(L981) CTH1291 89 Transistor(Q751, 901) 2SD2396 90 IC(IC911) NJM2388F84

91 IC(IC301) PAL007A 92 Holder CNV7619 93 Screw BMZ40P140FTC 94 IC(IC2) TSOP4840SB1

Sub Button Assy(UP, DOWN, LEFT, RIGHT)

CD Mechanism Module(S10.1AACA)

XXA7310

CXK5668

A

B

C

D

E

F

56

DEH-P4750MP/XM/GS

7

8

11

1234

(2) CONTRAST TABLE

DEH-P4750MP/XM/GS, DEH-P4790MP/XM/ID and DEH-P4770MP/XM/CS are constructed the same except for the following:

Mark No. Description DEH-P4750MP/XM/GS DEH-P4790MP/XM/ID DEH-P4770MP/XM/CS

A

10 Tuner Amp Unit CWM9777 CWM9777 CWM9895 17 Pin Jack(CN351) CKB1059 CKB1059 CKB1054 27 Holder CND1237 CND1237 CND1238 33 Detach Grille Assy CXC3891 CXC4374 CXC3893 38 LCD(LCD1) CAW1852 CAW1852 CAW1851

45 Sub Grille Assy CXC3948 CXC4332 CXC4330 47 Button(CLOCK) CAC9004 CAC9004 XAC7062 48 Button(DISPLAY) CAC9005 CAC9005 XAC7063 49 Button(LOUDNESS) CAC9006 CAC9006 CAC9086 50 Button(OPEN) CAC9007 CAC9007 XAC7065

B

87 Sheet CNM9288 CNM9288 Not used

C

D

E

F

12

1234

DEH-P4750MP/XM/GS

5678

A

B

C

D

E

56

DEH-P4750MP/XM/GS

F

7

8

13

1234

2.3 CD MECHANISM MODULE

42

A

5

13

5

81

34

5

15

22

E

F

93

13

A

44

B

5

B

1

54

53

C

52

13

D

86

82

83

4

37

71

4

29

51

I

73

1

50

72

10

1

76

55

5

36

4

1

18

2

64

47

C

24

2

1

7

61

2

M

1

23

87

75

B

E

63

57

62

58

1

G

L

1

N

R

1

2

1

40

56

D

O

16

P

1

33

1

P

19

J

12

3

20

39

1

69

30

2

21

M

D

79

2

1GEM1024 2GEM1045 3GEM1035

E

92

26

G

68

28

I

H

28

45

J

38

23

K

59

49

F

Q

A

27

H

77

90

48

8

67

17

78

25

70

60

80

N

L

K

43

46

6

60

11

89

10

14

74

R

31

41

85

C

91

F

C

65

1

2

3

85

66

35

O

31

Q

14

85

14

1234

DEH-P4750MP/XM/GS

5678

CD MECHANISM MODULE SECTION PARTS LIST

Mark No. Description Part No.

1 CD Core Unit(S10.1) CWX3096 2 Connector(CN101) CKS4182 3 Connector(CN901) CKS4017 4 Screw BMZ20P035FTC 5 Screw BSZ20P040FTC

6 Screw(M2x4) CBA1362 7 Screw(M2x3) CBA1824 8 Screw(M2x3) CBA1825 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 CNC9962 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 CNV7798 44 Guide CNV7799 45 Arm CNV8403

Mark No. Description Part No.

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 CNV7218

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) CXX1641

91 Screw IMS26P030FTC 92 Spring CBL1635 93 Clamper CNV8372

A

B

C

D

E

46 Rack CNV8374 47 Holder CNV8376 48 Holder CNV8377 49 Arm CNV8378

56

DEH-P4750MP/XM/GS

F

7

8

15

E

R

2

A

1234

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

A

ANTENNA

B

C

TUNER AMP UNIT

A

FM/AM TUNER UNIT

CN401

1

2,3

1

3

AM ANT

FM ANT

ATT

ANT adj

FMRF

RF adj

VDD

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

WC

CE2

ROM_VDD

IC 3 EEPROM

5.0V

OSC

LPF

IC 1

3.3V

MIXER, IF AMP

T51

CF52

RFGND

OSCGND

DGND

212 1522 16 4 17

AUDIOGNDNCVCC

CF51

VDD_3.3

SL

3.3V

TUN 3.3V SYS +B

DI

IC 5

←

5V 3.3V

IC 4

3.3V 2.5V

CK

NC

CE1

←

2.5V

DO

NCNCNC

NC

IC 2

2.5V

DET, FM MPX

Rch

24

Lch

23

IC 431

NJM4558MD

75

TUN L

3

6

5

CDL

4

CN101

BUSL-

11

IP-BUS

CD CORE UNIT(S10.1)

D

E

PICKUP UNIT (P10)(SERVICE)

LASER DIODE

HOLOGRAM

UNIT

FOCUS ACT.

TRACKING ACT.

MONITOR

DIODE

M1

SPINDLE

MOTOR

M2

LOADING/CARRIAGE

MOTOR

M

F

C

Q101

AC,BD

E,F

S904 12EJ

3

V3R3D

142

LD

143

PD

FD,TD

12

FOP

13

TOP

16

SOP

15

SOM

18

LCOP

17

LCOM

BA5835FP

S905

8EJ

IC 203

NJM2885DL1-33

UPD63763GJ

RF AMP, CD DECODER, MP3 AND WMA DECODER, DIGITAL SERVO/DATA PROCESSOR

SD,MD

CD

DRIVER

22

LOEJ

9

CONT

IC 301

S901

S903

HOME

DSCSNS

1

3.3V REGULATOR

IC 201

MICRO

COMPUTER

53

LOEJ

47

CONT

32

12EJ

31

8EJ

30

DSCSNS

97

HOME

VD2

X701

1312

X1

IC 701

PE5454A

3VDD

LOUT

X2

reset

VDCONT CD3VON

3V REGULATOR

3

31

14

BRST,BRXEN,BSRQ

BDATA,BSCK

49 46

IC 703

CN901

LOUT

RESET

VD

VDCONT

VD2

CD3VON

VDD

2

CN101

LD-

15

MD

5

FOP

1

TOP

4

LD+

14

V3R3D

7

8

5 1

CN721

14

10

RESET RST2

15

9

VD1

3

21

4

20

VDCONT

19

5

VD2

22

2

CD3VON

1

23

5

19

BUSL+

Q101

Q102

5

BUS-

6

BUS+

CD L

A

BRST,BRXEN,BSRQ,BDATA,BSCK

Q761

Q762

VDD

B.UP

ASENBO

Q751

IC 101

HA12240FP

1

DIN1

2

DOUT

8

STBY

Q753

34

5

2

B.UP

71

ASENBO

86

TX

85

RX

24

IPPW

SYSTEM CONT

IC 601(2/

PE5465

S-812C33AUA-C2N

VDD

16

1234

DEH-P4750MP/XM/GS

5678

A

IC 431

JM4558MD

71

ASENBO

86

TX

85

RX

24

IPPW

Q352

Q351

R Lch

F Lch

CN351

8

4

SP601

CN981

16

14

REAR OUTPUT

(DEH-P4770MP/XM/CS)

FRONT OUTPUT

FUSE

16

10A

14

B

BACK UP

ACC

RST2

A

TUNPDO

98

TUNPDO

TUNPDI

94 74 97 99 32

TUNPDI SL TUNPCK TUNPCE1 TUNPCE2

SL TUNPCK CE1 CE2

7

IC 651

BD4834G

11

RESET

SYSTEM CONTROLLER

IC 601(1/2)

PE5465A

DALMON

BSENS

ASENS

VDD

100

PEE

VDD 5V REG

VDD

10

93

92

BSENS

ASENS

Q901

BACKUP SENSE

Q931

Q902

B.UP

ACC

RESET

13

ACC SENSE

15

B.UP

20

VCC3/4 VCC1/2

IC 301

STBY

4

6

FLFL+ RLRL+

B.REMOTE

SYS 8V REG.

IC 911

NJM2388F84

4

SYSPW

23 21 3 5

25

1213

B.UP

SYSPW

7

5

8

6

11

ELECTRONIC VOLUME/

AMP

SOURCE SELECTOR

TUN L

3

IN2L

6

5

CDL

4

IN4-L

PML003AM

IN4+L

IN3L

EVCK, EVDT, EVST

MUTE

SYSPW

IC 231

37

21

B.UP

F Lch

R Lch

10

11

MUTE

Q391

B.UP

MUTE

Q371

Q301

SYS+B

TU 3.3V

14

RLIN

12

FLIN

22

MUTE

TUN 3V REG.

IC 921

NJM2391DL1-33

PAL007A

GND

FLFL+ RL-

RL+

B. REM

C

D

SYSTEM CONTROLLER

IC 601(2/2)

PE5465A

ILMPW

EJECTIN

FLPILM

SWVDD

CSENS

DSENS

16

X1

X601

12.58291MHz

15

ROT1

ROT0

DPDT

KYDT

X2

Q871

ILB

Q861

Q851

EJSW

EJILP

SWVDD

ROT1

ROT0

CSENS

DPDT

KYDT

10

8

5

2

12

13

6

11

14

B.UP

Q872

20

8

B.UP

Q862

9

VDD

Q852

1

56

57

77

96

95

S831

90

D

10

8

5

2

12

13

6

11

14

PANEL UNIT

S1970

EJECT

SWVDD

ROT1

ROT0

CSENS

DPDT

KYDT

ILB BL+B S2,S4,S9,S12,S14,S18

CN1CN831 CN1950 CN1951

5

8

2

11

SWVDD

S19

ROT1

7

6

ROT0

9

4

11

2

DPDT

10

3

KYDT

8

5

DSENS

DEH-P4750MP/XM/GS

56

SWVDD

REM.CON.VOLUME

3

IC2

TSOP4840SB1

7

18

DPDT

20

KYDT

10

VLCD

55

VDD

KEY MATRIX

2

17

REM

LCD DRIVER/

KEY CONTROLLER

KEY DATA

IC 1

PD6340A

KEYBOARD UNIT

B

22

XO

X1

4.97MHz

23

XI

E

F

LCD1

8

17

1234

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

A-a A-b

A-a

A-b

Large size

SCH diagram

Guide page

A-b

Detailed page

C

CN901

A-a

B

CD-DA, MP3 : 0.2dB

FM(30%) : -31dB AM(30%) : -31dB

IP-BUS : 2.2dB

CD-DA, MP3 : 0.2dB

C

1432

811109

576

IP-BUS : 2.2dB

dalmon

mute

D

FM/AM TUNER UNIT

FM(30%) : -30dB

AM(30%) : -30dB

NC NC NC NC

NCNCNC

TSCK/BSCK

ASENSBO

TSI/BSI

E

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.

Decimal points for resistor and capacitor fixed values

F

are expressed as :

←

2.2 2R2

←

0.022 R022

CN1

B

PANEL UNIT

D

EJECT

DSENS

A D

18

1234

DEH-P4750MP/XM/GS

5678

A

A-b

TUNER AMP UNIT

A

FRONT R CH

FRONT L CH

B

FM(30%) : -5.9dB AM(30%) : -5.9dB

IP-BUS : 10.3dB

CD-DA, MP3 : 10.3dB

REAR R CH

REAR L CH

>

FM(30%) : -6.66dB AM(30%) : -6.66dB

IP-BUS : 9.54dB

CD-DA, MP3 : 9.54dB

TSCK/BSCK

TSI/BSI

dalmon

ASENSBO

C

POWER AMP

BEEP

NC NC

600µH

FM(30%) : 20.1dB

AM(30%) : 20.1dB

CD-DA, MP3 : 36.3dB

>

IP-BUS : 36.3dB

BACKUP GND

ACC

B.REM

RL— FL— RL+ FL+ RR— FR— RR+ FR+

D

E

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.

DEH-P4750MP/XM/GS

56

F

A

7

8

19

A

B

A-b

1234

IP-BUS : 2.2dB

AM(30%) : -31dB

FM(30%) : -31dB

CD-DA, MP3 : 0.2dB

1

dalmon

mute

C

A-b A-a

A-a

D

E

F

A-a

20

C

CD-DA, MP3 : 0.2dB

CN901

1432

576

811109

IP-BUS : 2.2dB

DEH-P4750MP/XM/GS

1234

5678

A

dalmon

mute

NCNCNC

EJECT

4

DSENS

A-b

B

C

ASENSBO

TSI/BSI TSCK/BSCK

NC NC NC

NC

2

3

PANEL UNIT

CN1

B

D

←

A-b A-a

A-a

D

E

FM/AM TUNER UNIT

AM(30%) : -30dB FM(30%) : -30dB

DEH-P4750MP/XM/GS

56

Decimal points for resistor

and capacitor fixed values

are expressed as :

2.2 2R2

A-a

8

0.022 R022

F

D

21

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.

NOTE :

7

1234

A

FRONT

R CH

FRONT

L CH

REAR

R CH

REAR

L CH

IP-BUS : 9.54dB

FM(30%) : -6.66dB

AM(30%) : -6.66dB

CD-DA, MP3 : 9.54dB

>

B

TUNER AMP UNIT

POWER AMP

A

C

A-b A-a

D

E

IP-BUS : 10.3dB

FM(30%) : -5.9dB

AM(30%) : -5.9dB

CD-DA, MP3 : 10.3dB

F

A-b

22

BEEP

1

dalmon

DEH-P4750MP/XM/GS

1234

5678

FR—

BACKUP

GND

FL—

RL+

RL—

B.REM

ACC

FR+

FL+

RR+

RR—

>

IP-BUS : 36.3dB

FM(30%) : 20.1dB

AM(30%) : 20.1dB

A

CD-DA, MP3 : 36.3dB

600µH

B

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.

C

A-b A-a

D

E

BEEP

dalmon

NC

ASENSBO

2

DEH-P4750MP/XM/GS

56

F

3

7

4

8

A-b

23

1234

3.3 KEYBOARD UNIT

A

B

C

LCD DRIVER/ KEY CONTROLLER

D

CS:CAW1851

GS,ID:CAW1852

E

F

B

24

1234

DEH-P4750MP/XM/GS

5678

A

KEYBOARD UNIT

B

FUNCTION

DISPLAY

B

CN1951

D

C

CLOCK

LOUDNESS

D

: The power supply is shown with the marked box.

DEH-P4750MP/XM/GS

56

CS:NSCW505C-4234

GS,ID:NSCW505C-4237

7

VOLUME

E

F

B

8

25

PIONEER DEH-P4750MP, DEH-P4770MP, DEH-P4790MP Service Manual

SAFETY INFORMATION

CONTENTS

1. SPECIFICATIONS

2. EXPLODED VIEWS AND PARTS LIST

2.1 PACKING

2.2 EXTERIOR

2.3 CD MECHANISM MODULE

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

3.3 KEYBOARD UNIT