Pioneer KEH-P4850J Bedienungsanleitung

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

PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.

PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium

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

C PIONEER ELECTRONIC CORPORATION 1999 K-ZZU. MAR. 1999 Printed in Japan

ORDER NO.

CRT2333

MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM/SW TUNER

KEH-P4850J ES

Service

Manual

CONTENTS

1. SAFETY INFORMATION............................................2

2. EXPLODED VIEWS AND PARTS LIST ......................2

3. SCHEMATIC DIAGRAM.............................................8

4. PCB CONNECTION DIAGRAM................................20

5. ELECTRICAL PARTS LIST........................................30

6. ADJUSTMENT.........................................................36

7. GENERAL INFORMATION.......................................38

7.1 PARTS ................................................................38

7.1.1 IC...............................................................38

7.1.2 DISPLAY ...................................................42

7.2DISASSEMBLY ...................................................43

7.3BLOCK DIAGRAM ..............................................44

8. OPERATIONS AND SPECIFICATIONS....................45

NOTE:

-See the separate manual CX-631(CRT1640) for the cassette mechanism description.

-The cassette mechanism assy employed in this model is one of 2L series.

-This service manual does not describe the CD test mode.

For the operations in the CD test mode, refer to the CD player's Service Manual.

KEH-P4850J

2. EXPLODED VIEWS AND PARTS LIST

2.1 PACKING

310

16 217

1. 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 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 mot risk trying to do so

and refer the repair to a qualified service technician.

KEH-P4850J

NOTE:

-Parts marked by “*”are generally unavailable because they are not in our Master Spare Parts List.

-Screws adjacent to ∇mark on the product are used for disassembly.

-PACKING SECTION PARTS LIST

Mark No. Description Part No.

1-1 Owner’s Manual CRD2788

(English, Spanish, Portuguese(B), Arabic)

1-2 Installation Manual CRD2790

(English, Spanish, Portuguese(B), Arabic)

2 Cord Assy CDE5798

3 Spring CBH-865

4 Screw Assy CEA2003

5 Screw CBA1284

* 6 Polyethylene Bag CEG-127

7 Screw CRZ50P090FMC

8 Screw TRZ50P080FMC

* 9 Polyethylene Bag CEG-158

10 Handle CNC5395

11 Bush CNV1009

12 Polyethylene Bag CEG-162

13 Carton CHG3801

14 Contain Box CHL3801

15 Protector CHP2101

16 Protector CHP2102

17 Case Assy CXB3520

18 Accessory Assy CEA2002

KEH-P4850J

2.2 EXTERIOR

KEH-P4850J

1 Screw BSZ26P050FMC

2 Screw BSZ30P050FMC

3 Cord Assy CDE5798

4 Fuse(10A) CEK1136

5 Case CNB2350

6 Panel CNS5132

7 Screw BSZ30P050FMC

8 Screw BSZ30P200FMC

9 Holder CNC5704

10 Cushion CNM5210

11 Insulator CNM5963

12 Tuner Amp Unit CWM6253

13 Screw BPZ26P080FMC

14 Screw BSZ26P080FMC

15 Screw BSZ26P160FMC

16 Tuner Unit CWE1430

17 Holder CNC6122

18 Pin Jack(CN301) CKB1028

19 Plug(CN603) CKM1270

20 Connector(CN701) CKS3408

21 Connector(CN602) CKS3568

22 Connector(CN601) CKS3581

23 Antenna Cable(CN403) CDH1274

24 Panel CNB2491

25 Holder CNC2218

26 Holder CNC6845

27 Holder CNC7996

28 Heat Sink CNR1505

29 Chassis Unit CXB3012

30 Screw ISS26P055FUC

31 Holder CNC6798

32 Detach Grille Assy CXB4247

33 Screw BPZ20P060FMC

34 Screw BPZ20P100FZK

35 Button(Detach) CAC5789

36 Button(1-6) CAC5794

37 Button(-) CAC5930

38 Button(EQ) CAC6135

39 Button(+) CAC5783

40 Button(Eject) CAC5793

41 Button(Display) CAC5788

42 Button(Cross) CAC5786

43 Button(A,B) CAC5787

44 Spring CBH2103

45 Cover CNS5130

46 Housing CNV5528

47 Keyboard Unit CWM6264

48 LCD(LCD1901) CAW1543

49 Connector(CN1901) CKS3580

50 Holder CNC7981

51 Sheet CNM5941

52 Lighting Conductor CNV5527

53 Connector CNV5531

54 Grille Unit CXB4147

55 Button CAC5180

56 Spring CBH1834

57 Spring CBH1835

58 Spring CBH2182

59 Bracket CNC6135

60 Bracket CNC6791

61 Arm CNV4692

62 Arm CNV4693

63 Arm CNV4951

64 Panel Unit CXB3019

65 Door CAT2028

66 Spring CBH1838

67 Screw IMS20P030FZK

68 Case Assy CXB3520

69 Cassette Mechanism ModuleEXK3695

70 IC(IC302) TDA7384

71 Transistor(Q904) 2SD2396

72 Holder CNC4963

73 Sheet CNM6292

74 Sheet CNM6293

-EXTERIOR SECTION PARTS LIST

Mark No. Description Part No. Mark No. Description Part No.

KEH-P4850J

2.3 CASSETTE MECHANISM MODULE

KEH-P4850J

Mark No. Description Part No. Mark No. Description Part No.

1 Screw BSZ20P040FMC

2 Washer CBF1037

3 Washer CBF1038

4 Washer CBG1003

5 Deck Unit EWM1021

6 Screw EBA1028

7 Screw EBA1037

8 Spring EBH1531

9 Spring EBH1575

10 Plug(CN251) CKS3540

11 Spring EBH1515

12 Spring EBH1587

13 Spring EBH1517

14 Spring EBH1518

15 •••••

16 Spring EBH1537

17 Cord EDD1020

18 Photo-interrupter(EGN2,3) EGN1006

19 Photo-interrupter(EGN1) EGN1005

20 Roller ENR1031

21 Shaft ELA1373

22 Pinch Roller ENV1518

23 Arm ENC1489

24 Arm ENC1397

25 Guide ENC1481

26 Holder ENC1417

27 Lever ENC1448

28 Arm ENC1488

* 29 Motor EXM1031

30 Belt ENT1027

31 Gear ENV1347

32 Collar ENV1508

33 Gear ENV1350

34 Flywheel ENV1500

35 Worm Gear ENV1439

36 Worm Wheel ENV1440

37 Gear ENR1028

38 Lever ENV1442

39 •••••

40 Gathering PCB ENX1037

41 Gathering PCB ENX1042

42 Switch(S1) ESG1004

43 Motor Unit(M2) EXA1485

44 Chassis Unit EXA1511

45 Pinch Holder ENV1485

46 Pinch Holder ENV1486

47 Reel Unit EXA1543

48 Head Base Unit EXA1457

49 Lever Unit EXA1438

50 Gear Unit EXA1574

51 Frame Unit EXA1458

52 Lever Unit EXA1439

53 Head Assy(HD1) EXA1506

54 Motor Unit(M1) EXA1490

55 Washer HBF-179

56 Screw BMZ20P022FMC

57 Spring EBH1545

58 Washer YE20FUC

59 Pinch Holder Unit EXA1529

60 Pinch Holder Unit EXA1528

-CASSETTE MECHANISM MODULE SECTION PARTS LIST

KEH-P4850J

1234

3. SCHEMATIC DIAGRAM

3.1 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-b

A-b

A-a

Large size

SCH diagram

Guide page

Detailed page

4R7/16

7.2MHz

TUNER UNIT

DECK UNIT

KEYBOARD UNI

TAPE: -9dBs

FM: -15.5dBs

AM: -22dBs

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

*Capacitors

Code Practical value

103 10kpF(0.01uF)

101/10 100uF/10V

CN19

PM2006A

A-a

KEH-P4850J

5678

3300/16

600µH

4.194MHz

PE5053A

ATUNER AMP UNIT

NIT

CD: +2.2dBs

FM: +9.6dBs

AM: -3.1dBs

TAPE: -4dBs

CD: +10.3dBs

FM: +35.6dBs

AM: +29.1dBs

TAPE: +22.0dBs

CD: +36.3dBs

SYSTEM CONTROLLER

IP-BUS DRIVER

ELECTRONIC VOLUME

POWER AMP

RESET

8V REGULATER

IP-BUS

CEK1136

TAPE: -4.2dBs

1901

332/16

A-b

KEH-P4850J

1234

4R7/16

7.2MHz

BTUNER UNIT

FM: -15.5dBs

AM: -22dBs

IP-BUS DR

ELE

PM2006A

A-a

A-a A-b

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