Pioneer KEH-3830R User 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
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
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
10 113
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
1234
B
C
D
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-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
5678
A
B
C
D
5678
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
UNIT
332/16
PD4974A
CEK1136
A
A-b

10
KEH-3830R,3800R,3820R
A
1234
B
C
D
1234
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
5678
A
B
C
D
5678
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
1234
B
C
D
1234
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
5678
A
B
C
D
5678
EWmodel
B REMOTE
CONTROLLER
8V REGULATER
4A
A-b
A-a A-b

14
KEH-3830R,3800R,3820R
A
1234
B
C
D
1234
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
5678
A
B
C
D
5678
B
ER UNIT
A

16
KEH-3830R,3800R,3820R
A
1234
B
C
D
1234
B
-KEH-3820R/X1M/GR
FM/AM TUNER UN
B

17
KEH-3830R,3800R,3820R
5678
A
B
C
D
5678
B
ER UNIT
A

18
KEH-3830R,3800R,3820R
A
1234
B
C
D
1234
CAW1542
3.3 KEYBOARD UNIT
C

19
KEH-3830R,3800R,3820R
5678
A
B
C
D
5678
CKEYBOARD UNIT
IL1901-1905:CEL1610(3830R,3820R)
CEL1605(3800R)
40mA 14V
EDIT
TA
PTY
LOCAL/BSM
C
CN601
A

20
KEH-3830R,3800R,3820R
A
1234
B
C
D
1234
3.4 CASSETTE MECHANISM MODULE
D
DECK UNIT
MUTE
CXA2559Q
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29 28 27
26 25
24
23
22 21
1
2 3 4
5 6
7
8
9 10
CN602
R256 220
R287
0R0
C273
22/16
R283 0R0
R284 0R0
R282 0R0
C253 330P
C254 330P
C252 330P
C251 330P
R281 0R0
R255 220
C256
R01
R258
1K
R301
18K
R273 1K
R274 1K
R271 1K
R272 1K R290 0R0
C403 R068
R403 82K
C402
4700P
C401
R33
R40216K
R401
4R7K
R323 0R0
R257
1K
C255
R01
C272 R1
C313 100P
R386 0R0
R285 0R0
HD1
HEAD ASSY
EXA1506
TEST TAPE
NCT-150
(400Hz, 200nWb/m)
RL
RR
FR
FL
Signal GND
C302
R1
C302
R1
C301
R1
R304R302 16K16K
R305
16K
R303
16K
-6dBs(388mV)±1dB
D
A
Fwd-R
Fwd-L