Pioneer KEH-P4830R 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.
CRT2258
MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH RDS TUNER
KEH-P4830R X1M/EW
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-P4800R X1M/EW
KEH-P4830R/X1M/EW

2
KEH-P4830R,P4800R
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
2
13,14,15,16,17,18
19
1
7
6
8
5
4
9
10
11
12
3

3
KEH-P4830R,P4800R
1 Carton(P4830R) CHG3568
Carton(P4800R) CHG3567
2 Contain Box(P4830R) CHL3568
Contain Box(P4800R) CHL3567
3 Cord Assy CDE5796
4 Accessory Assy CEA1917
5 Screw CBA1304
6 Handle CNC5395
7 Bush CNV3930
* 8 Polyethylene Bag E36-615
9 Polyethylene Bag CEG-162
10 Protector CHP2102
11 Protector CHP2101
12 Inner-box CHW1754
13 Owner’s Manual CRD2777
14 Owner’s Manual CRD2778
15 Owner’s Manual CRD2779
16 Installation Manual CRD2780
* 17 Passport CRY1013
* 18 Warranty Card CRY1087
19 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.
-PACKING SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
-Owner's Manual, Installation Manual
Model Part No. Language
KEH-P4830R/X1M/EW CRD2777 English,Spanish
KEH-P4800R/X1M/EW CRD2778 German,French
CRD2779 Italian,Dutch
CRD2780 English,Spanish,German,
French,Italian,Dutch

4
KEH-P4830R,P4800R
2.2 EXTERIOR

5
KEH-P4830R,P4800R
1 Screw BSZ26P050FMC
2 Screw BSZ30P050FMC
3 Cord Assy CDE5796
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 BPZ26P080FMC
14 Screw BSZ26P080FMC
15 Screw BSZ26P160FMC
16 Cord CDE5750
17 FM/AM Tuner Unit CWE1466
18 Holder CNC6554
19 Pin Jack(CN301) CKB1035
20 Plug(CN603) CKM1288
21 Connector(CN701) CKS3408
22 Connector(CN602) CKS3568
23 Connector(CN601) CKS3581
24 Antenna Jack(CN402) CKX1056
25 Panel CNB2340
26 Holder CNC5399
27 Holder CNC6845
28 Holder CNC7996
29 Heat Sink CNR1505
30 Chassis Unit See Contrast table(2)
31 Screw ISS26P055FUC
32 Holder Unit CXB2687
33 Detach Grille Assy See Contrast table(2)
34 Screw BPZ20P060FMC
35 Screw BPZ20P100FZK
36 Button See Contrast table(2)
37 Button(1-6) CAC5785
38 Button See Contrast table(2)
39 Button See Contrast table(2)
40 Button See Contrast table(2)
41 Button(Eject) CAC5793
42 Button(Display) CAC5788
43 Button See Contrast table(2)
44 Button See Contrast table(2)
45 Spring CBH2103
46 Cover See Contrast table(2)
47 Housing CNV5528
48 Keyboard Unit See Contrast table(2)
49 LCD(LCD1901) See Contrast table(2)
50 Connector(CN1901) CKS3580
51 Holder CNC7981
52 Spacer CNM5043
53 Sheet CNM5941
54 Lighting Conductor CNV5527
55 Connector CNV5531
56 Grille Unit See Contrast table(2)
57 Button CAC4836
58 Spring CBH1834
59 Spring CBH1835
60 Spring CBH2182
61 Bracket CNC6135
62 Bracket CNC6791
63 Arm CNV4692
64 Arm CNV4693
65 Arm CNV4728
66 Panel Unit See Contrast table(2)
67 Door See Contrast table(2)
68 Spring CBH1838
69 Screw IMS20P030FZK
70 Case Assy CXB3520
71 Cassette Mechanism ModuleEXK3695
72 IC(IC1902) SBX8035-H
73 IC(IC302) TDA7384
74 Transistor(Q904) 2SD2396
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.

Part No.
Mark No. Description KEH-P4830R/X1M/EW KEH-P4800R/X1M/EW
12 Tuner Amp Unit CWM6246 CWM6245
30 Chassis Unit CXB3015 CXB3014
33 Detach Grille Assy CXB3320 CXB3319
36 Button(Detach) CAC5929 CAC5789
38 Button(-) CAC5931 CAC5930
39 Button(EQ) CAC6136 CAC6135
40 Button(+) CAC5797 CAC5783
43 Button(Cross) CAC5799 CAC5786
44 Button(A,B) CAC5801 CAC5787
46 Cover CNS5131 CNS5130
48 Keyboard Unit CWM6257 CWM6110
49 LCD(LCD1901) CAW1542 CAW1506
56 Grille Unit CXB4063 CXB4062
66 Panel Unit CXB3022 CXB3021
67 Door CAT1835 CAT2028
6
KEH-P4830R,P4800R
2.3 CASSETTE MECHANISM MODULE
(2)CONTRAST TABLE
KEH-P4830R/X1M/EW and KEH-P4800R/X1M/EW have
the same construction except for the following:

7
KEH-P4830R,P4800R
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-P4830R,P4800R
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
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
C
DECK UNIT
PM2007A
A-a
A

9
KEH-P4830R,P4800R
5678
A
B
C
D
5678
PD4972A
TUNER AMP UNIT
CD: +2.2dBs
FM: +9.6dBs
AM: -0.9dBs
TAPE: -4dBs
CD: +10.3dBs
FM: +35.6dBs
AM: +25.1dBs
TAPE: +22.0dBs
CD: +36.3dBs
SYSTEM CONTROLLER
IP-BUS DRIVER
ELECTRONIC VOLUME
POWER AMP
RESET
8V REGULATER
VDD SWITCH
A
A
IP-BUS
CEK1136
TAPE: -4.2dBs
CN1901
UNIT
332/16
A
A-b

10
KEH-P4830R,P4800R
A
1234
B
C
D
1234
4R7/16
4R7/16
FM/AM TUNER UNIT
FM: -15.5dBs AM: -26dBs
IP
B
PM2007A
A-a
A-a A-b

11
KEH-P4830R,P4800R
5678
A
B
C
D
5678
223(B)
PD4972A
TAPE: -9dBs
SYSTEM CONT
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
C
DECK UNIT
A-a
A-a A-b

12
KEH-P4830R,P4800R
A
1234
B
C
D
1234
TUNER AMP UNIT
FM: +9.6dBs AM: -0.9dBs TAPE: -4dBs CD: +10.3dBs
FM: +35.6dBs AM: +25.1dBs TAPE: +22.0dBs CD: +36.3dBs
IP-BUS DRIVER
ELECTRONIC VOLUME
POWER AMP
RESET
A
A
CEK1136
TAPE: -4.2dBs
332/16
A-a A-b
A-b

13
KEH-P4830R,P4800R
5678
A
B
C
D
5678
4972A
CD: +2.2dBs
M CONTROLLER
8V REGULATER
VDD SWITCH
IP-BUS
A-b
A-a A-b

14
KEH-P4830R,P4800R
A
1234
B
C
D
1234
3.2 FM/AM TUNER UNIT
B
3
1
2
FM/AM TUNER UN
B

15
KEH-P4830R,P4800R
5678
A
B
C
D
5678
B
ER UNIT
A

16
KEH-P4830R,P4800R
A
1234
B
C
D
1234
CAW1542:P4830R/X1M/EW
CAW1506:P4800R/X1M/EW
3.3 KEYBOARD UNIT
C

17
KEH-P4830R,P4800R
5678
A
B
C
D
5678
CKEYBOARD UNIT
IL1901-1905:CEL1610(P4830R/X1M/EW)
CEL1605(P4800R/X1M/EW)
40mA 14V
/EW
/EW
EDIT
TA
PTY
LOCAL/BSM
C
CN601
A

18
KEH-P4830R,P4800R
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

19
KEH-P4830R,P4800R
5678
A
B
C
D
5678
F
E
D
PCB UNIT
REEL PCB
SWITCHES:
PCB UNIT
S1:LOAD SWITCH..........EJECT-PLAY
S2:70µs SWITCH............ON-OFF
The underlined indicates the switch position.
68
K
16K
R351 1K
R352 1K
R353 1K
R354 1K
R373 0R0
R355 270K
C352 3900P
R362 180
C351 R22
C353 R01
C354 R01
R374 0R0
C356 R01
C355 R1
D352 1SS355
M1
MOTOR UNIT
(MAIN MOTOR)
EXA1490
S1 LOAD
ESG1004 S2
ESG1004
70µs
MODE
SENSE
EGN1
EGN1005
EGN2
EGN1006
FWD END
SENSE
EGN3
EGN1006
REV END
SENSE
M2
MOTOR UNIT
(SUB MOTOR)
EXA1485
Power GND
E
F

20
KEH-P4830R,P4800R
A
1234
B
C
D
1234
A
CN1901
C
CORD ASSY
TUNER AMP UNIT
4. PCB CONNECTION DIAGRAM
4.1 TUNER AMP UNIT
NOTE FOR PCB DIAGRAMS
1. The parts mounted on this PCB
include all necessary parts for
several destination.
For further information for
respective destinations, be sure
to check with the schematic
diagram.
2. Viewpoint of PCB diagrams
Capacitor
Connector
P.C.Board Chip Part
SIDE A
SIDE B
A