PIONEER KEH-3830R, KEH-3800, KEH-3820 Service Manual

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.

CRT2257

HIGH POWER CASSETTE PLAYER WITH RDS TUNER

KEH-3830R X1M/EW

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

KEH-3820R X1M/GR

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.

KEH-3800R X1M/EW

KEH-3830R/X1M/EW

2

KEH-3830R,3800R,3820R

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 not risk trying to do so
and refer the repair to a qualified service technician.

2. EXPLODED VIEWS AND PARTS LIST

2.1 PACKING

10

1

13

7

11

9

8

12

2

5

4

6

3

3

KEH-3830R,3800R,3820R

1 Cord Assy CDE5797
2 Accessory Assy CEA1917
3 Screw CBA1304
4 Handle CNC5395
5 Bush CNV3930

* 6 Polyethylene Bag E36-615

7 Polyethylene Bag CEG-162
8 Carton

See Contrast table(2)

9 Contain Box See Contrast table(2)

10 Protector CHP2102

11 Protector CHP2101
12-1 Owner’s Manual See Contrast table(2)
12-2 Owner’s Manual See Contrast table(2)
12-3 Installation Manual See Contrast table(2)

* 12-4 Passport CRY1013
* 12-5 Warranty Card CRY1087

13 Case Assy CXB3520

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.

(1) PACKING SECTION PARTS LIST

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

Part No.

Mark No. Description KEH-3830R/X1M/EW KEH-3800R/X1M/EW KEH-3820R/X1M/GR

8 Carton CHG3572 CHG3708 CHG3589

9 Contain Box CHL3572 CHL3708 CHL3589
12-1 Owner’s Manual CRD2791 CRD2791 CRB1521
12-2 Owner’s Manual CRD2792 CRD2792 Not used
12-3 Installation Manual CRD2793 CRD2793 CRB1522

(2) CONTRAST TABLE
KEH-3830R/X1M/EW, KEH-3800R/X1M/EW and KEH-3820R/X1M/GR are constructed the same except for
the following:

- Owner's Manual, Installation Manual

Model Part No. Language
KEH-3830R/X1M/EW CRD2791 English,Spanish,German
KEH-3800R/X1M/EW CRD2792 French,Italian,Dutch

CRD2793 English,Spanish,German,

French,Italian,Dutch

KEH-3820R/X1M/GR CRB1521,CRB1522 German

4

KEH-3830R,3800R,3820R

2.2 EXTERIOR

5

KEH-3830R,3800R,3820R

1 Screw BSZ26P050FMC
2 Screw BSZ30P050FMC
3 Cord Assy CDE5797
4 Fuse(10A) CEK1136
5 Plug CKM1290

6 Case CNB2350
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 BSZ26P080FMC
14 Screw BSZ26P160FMC
15 Cord CDE5752

16 FM/AM Tuner Unit

See Contrast table(2)

17 Holder CNC6554
18 Plug(CN603) CKM1288
19 Connector(CN602) CKS3568
20 Connector(CN601) CKS3581

21 Antenna Jack(CN402) CKX1056
22 Panel CNB2344
23 Holder CNC5399
24 Holder CNC6845
25 Holder CNC7996

26 Heat Sink CNR1505
27 Chassis Unit

See Contrast table(2)

28 Screw ISS26P055FUC
29 Holder Unit CXB2687
30 Detach Grille Assy

See Contrast table(2)

31 Screw BPZ20P060FMC
32 Screw BPZ20P100FZK
33 Button

See Contrast table(2)

34 Button(1-6) CAC5785
35 Button

See Contrast table(2)

36 Button See Contrast table(2)
37 Button See Contrast table(2)
38 Button(Eject) CAC5793
39 Button(Display) CAC5934
40 Button

See Contrast table(2)

41 Button See Contrast table(2)
42 Spring CBH2103
43 Cover

See Contrast table(2)

44 Housing CNV5528
45 Keyboard Unit

See Contrast table(2)

46 LCD(LCD1901) CAW1542
47 Connector(CN1901) CKS3580
48 Holder CNC7981
49 Sheet CNM5941
50 Lighting Conductor CNV5527

51 Connector CNV5531
52 Grille Unit

See Contrast table(2)

53 Button CAC4836
54 Spring CBH1834
55 Spring CBH1835

56 Spring CBH2182
57 Bracket CNC6135
58 Bracket CNC6791
59 Arm CNV4692
60 Arm CNV4693

61 Arm CNV4728
62 Panel Unit CXB3022
63 Door CAT1835
64 Spring CBH1838
65 Screw IMS20P030FZK

66 Case Assy CXB3520
67

Cassette Mechanism ModuleEXK3695

68 IC(IC302) TDA7384
69 Transistor(Q904) 2SD2396

(1) EXTERIOR SECTION PARTS LIST

Mark No. Description Part No.

Mark No. Description Part No.

6

KEH-3830R,3800R,3820R

2.3 CASSETTE MECHANISM MODULE

(2)CONTRAST TABLE
KEH-3830R/X1M/EW , KEH-3800R/X1M/EW and KEH-3820R/X1M/GR have
the same construction except for the following:

Part No.

Mark No. Description KEH-3830R/X1M/EW KEH-3800R/X1M/EW KEH-3820R/X1M/GR

12 Tuner Amp Unit CWM6251 CWM6251 CWM6250
16 FM/AM Tuner Unit CWE1466 CWE1466 CWE1470
27 Chassis Unit CXB3016 CXB3018 CXB3017
30 Detach Grille Assy CXB3325 CXB3880 CXB3324
33 Button(Detach) CAC5929 CAC5789 CAC5789
35 Button(-) CAC5931 CAC5930 CAC5930

36 Button(EQ) CAC6136 CAC6135 CAC6135
37 Button(+) CAC5797 CAC5783 CAC5783
40 Button(Cross) CAC5799 CAC5786 CAC5786
41 Button(A,B) CAC5801 CAC5787 CAC5787
43 Cover CNS5131 CNS5130 CNS5130

45 Keyboard Unit CWM6262 CWM6465 CWM6261
52 Grille Unit CXB4067 CXB4070 CXB4068
62 Panel Unit CXB3022 CXB3021 CXB3021
63 Door CAT1835 CAT2028 CAT2028

7

KEH-3830R,3800R,3820R

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

8

KEH-3830R,3800R,3820R

A

1

234

B

C

D

12

34

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-a

A-b

A-b

A-a

Large size

SCH diagram

Guide page

Detailed page

4R7/16

223(B)

4R7/16

EWmodel

EWmodel

EWmodel

PM4006B

PM2007A

CN251

FM/AM TUNER UNIT

TAPE: -9dBs

FM: -15.5dBs
AM: -26dBs

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 0.01uF
101/10 100uF/10V

B

D

KEYBOARD U

EWmodel

EWmodel

DECK UNIT

C

A-a

A

9

KEH-3830R,3800R,3820R

5

6

7

8

A

B

C

D

5

6

7

8

EWmodel

TUNER AMP UNIT

FM: +9.6dBs
AM: -0.9dBs
TAPE: -4dBs

FM: +35.6dBs
AM: +25.1dBs
TAPE: +22.0dB

B REMOTE

SYSTEM CONTROLLER

ELECTRONIC VOLUME

POWER AMP

RESET

8V REGULATER

A

A

CN1901

332/16

PD4974A

CEK1136

A

A-b

10

KEH-3830R,3800R,3820R

A

1

234

B

C

D

12

34

4R7/16

4R7/16

EWmodel

EWmodel

PM2007A

FM/AM TUNER UNIT

FM: -15.5dBs

AM: -26dBs

B

EWmodel

EWmodel

A-a

A-a

A-b

11

KEH-3830R,3800R,3820R

5

6

7

8

A

B

C

D

5

6

7

8

223(B)

EWmodel

PM4006B

CN251

TAPE: -9dBs

SYSTEM CONTR

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 0.01uF

101/10 100uF/10V

D

CN1901

KEYBOARD UNIT

EWmodel

EWmodel

PD4974A

DECK UNIT

C

A-a

A-a

A-b

12

KEH-3830R,3800R,3820R

A

1

234

B

C

D

12

34

TUNER AMP UNIT

FM: +9.6dBs

AM: -0.9dBs

TAPE: -4dBs

FM: +35.6dBs

AM: +25.1dBs

TAPE: +22.0dB

ELECTRONIC VOLUME

POWER AMP

RESET

A

A

332/16

CEK1136

A-a

A-b

A-b

13

KEH-3830R,3800R,3820R

5

6

7

8

A

B

C

D

5

6

7

8

EWmodel

B REMOTE

8V REGULATER

A-b

A-a

A-b

14

KEH-3830R,3800R,3820R

A

1

234

B

C

D

12

34

3.2 FM/AM TUNER UNIT

B

- KEH-3830R/X1M/EW,3800R/X1M/EW

3

1

2

FM/AM TUNER UN

B

15

KEH-3830R,3800R,3820R

5

6

7

8

A

B

C

D

5

6

7

8

B

A

16

KEH-3830R,3800R,3820R

A

1

234

B

C

D

12

34

B

- KEH-3820R/X1M/GR

FM/AM TUNER UN

B