Pioneer KEH-P4800 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. 501 Orchard Road, #10-00, Wheelock Place, Singapore 238880

C PIONEER ELECTRONIC CORPORATION 1998 K-ZZU. OCT. 1998 Printed in Japan

ORDER NO.

CRT2261

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

KEH-P4800 X1M/UC

Service

Manual

CONTENTS

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

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

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

4. PCB CONNECTION DIAGRAM................................22

5. ELECTRICAL PARTS LIST........................................32

6. ADJUSTMENT.........................................................39

7. GENERAL INFORMATION.......................................41

7.1 PARTS ................................................................41

7.1.1 IC...............................................................41

7.1.2 DISPLAY ...................................................45

7.2DISASSEMBLY ...................................................46

7.3BLOCK DIAGRAM ..............................................47

8. OPERATIONS AND SPECIFICATIONS....................48

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-P4850 X1M/ES

KEH-P4850/X1M/ES

KEH-P4800,P4850

2.2 EXTERIOR

KEH-P4800,P4850

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 See Contrast table(2)

13 Screw BPZ26P080FMC

14 Screw BSZ26P080FMC

15 Screw BSZ26P160FMC

16 FM/AM Tuner Unit See Contrast table(2)

17 Holder CNC6554

18 Pin Jack(CN301) CKB1035

19 Plug(CN603) CKM1270

20 Connector(CN701) CKS3408

21 Connector(CN602) CKS3568

22 Connector(CN601) CKS3581

23 Antenna Jack(CN402) CKX1056

24 Panel CNB2343

25 Holder CNC5399

26 Holder CNC6845

27 Holder CNC7996

28 Heat Sink CNR1505

29 Chassis Unit CXB3012

30 Screw ISS26P055FUC

31 Holder Unit CXB2687

32 Detach Grille Assy See Contrast table(2)

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 See Contrast table(2)

48 LCD(LCD1901) CAW1543

49 Connector(CN1901) CKS3580

50 Holder CNC7981

51 Sheet CNM5941

52 Lighting Conductor CNV5527

53 Connector CNV5531

54 Grille Unit See Contrast table(2)

55 Button CAC4836

56 Spring CBH1834

57 Spring CBH1835

58 Spring CBH2182

59 Bracket CNC6135

60 Bracket CNC6791

61 Arm CNV4692

62 Arm CNV4693

63 Arm CNV4728

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

(1) EXTERIOR SECTION PARTS LIST

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

KEH-P4800,P4850

2.3 CASSETTE MECHANISM MODULE

(2)CONTRAST TABLE

KEH-P4800/X1M/UC and KEH-P4850/X1M/ES have

the same construction except for the following:

Part No.

Mark No. Description KEH-P4800/X1M/UC KEH-P4850/X1M/ES

12 Tuner Amp Unit CWM6248 CWM6249

16 FM/AM Tuner Unit CWE1467 CWE1486

32 Detach Grille Assy CXB3322 CXB3323

47 Keyboard Unit CWM6259 CWM6260

54 Grille Unit CXB4065 CXB4066

KEH-P4800,P4850

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-P4800,P4850

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

UC model

ES model

331:UC model

510:ES model

FM/AM TUNER UNIT

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

KEYBOARD UNIT

DECK UNIT

A-a

KEH-P4800,P4850

5678

102:UC

103:ES

PD4973A

TUNER AMP UNIT

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

CN1901

332/16

A-b

KEH-P4800,P4850

1234

4R7/16

UC model

ES model

331:UC model

510:ES model

102:U

103:E

FM/AM TUNER UNIT

FM: -15.5dBs

AM: -22dBs

A-a

A-a A-b

KEH-P4800,P4850

5678

TAPE: -9dBs

SYSTEM

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

CN1901

KEYBOARD UNIT

DECK UNIT

A-a

A-a A-b

KEH-P4800,P4850

1234

TUNER AMP UNIT

FM: +9.6dBs

AM: -3.1dBs

TAPE: -4dBs

CD: +10.3dBs

FM: +35.6dBs

AM: +29.1dBs

TAPE: +22.0dBs

CD: +36.3dBs

IP-BUS DRIVER

ELECTRONIC VOLUME

POWER AMP

RESET

8V REGULATER

CEK1136

TAPE: -4.2dBs

332/16

A-a A-b

A-b

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