Service
Manual
ORDER NO.
CRT2333
MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM/SW TUNER
KEH-P4850J ES
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.
CONTENTS
1. |
SAFETY INFORMATION............................................ |
2 |
7. |
GENERAL INFORMATION....................................... |
38 |
2. |
EXPLODED VIEWS AND PARTS LIST ...................... |
2 |
|
7.1 PARTS ................................................................ |
38 |
3. |
SCHEMATIC DIAGRAM............................................. |
8 |
|
7.1.1 IC ............................................................... |
38 |
4. |
PCB CONNECTION DIAGRAM................................ |
20 |
|
7.1.2 DISPLAY ................................................... |
42 |
5. |
ELECTRICAL PARTS LIST........................................ |
30 |
|
7.2DISASSEMBLY ................................................... |
43 |
6. |
ADJUSTMENT ......................................................... |
36 |
|
7.3BLOCK DIAGRAM .............................................. |
44 |
|
|
|
8. |
OPERATIONS AND SPECIFICATIONS.................... |
45 |
|
|
|
|||
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
KEH-P4850J
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.
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
4 |
18 |
1 |
|
||
7 |
|
|
8 |
|
|
5 |
|
|
6 |
|
|
10 |
|
13 |
3 |
|
|
11 |
|
|
16 |
17 |
|
2 |
15
12
14
2
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 |
3
KEH-P4850J
2.2 EXTERIOR
4
KEH-P4850J
- EXTERIOR SECTION PARTS LIST
Mark No. Description |
Part No. |
|
Mark No. Description |
Part No. |
||
1 |
Screw |
BSZ26P050FMC |
41 |
Button(Display) |
CAC5788 |
|
2 |
Screw |
BSZ30P050FMC |
42 |
Button(Cross) |
CAC5786 |
|
3 |
Cord Assy |
CDE5798 |
43 |
Button(A,B) |
CAC5787 |
|
4 |
Fuse(10A) |
CEK1136 |
44 |
Spring |
CBH2103 |
|
5 |
Case |
CNB2350 |
45 |
Cover |
CNS5130 |
|
6 |
Panel |
CNS5132 |
46 |
Housing |
CNV5528 |
|
7 |
Screw |
BSZ30P050FMC |
47 |
Keyboard Unit |
CWM6264 |
|
8 |
Screw |
BSZ30P200FMC |
48 |
LCD(LCD1901) |
CAW1543 |
|
9 |
Holder |
CNC5704 |
49 |
Connector(CN1901) |
CKS3580 |
|
10 |
Cushion |
CNM5210 |
50 |
Holder |
CNC7981 |
|
11 |
Insulator |
CNM5963 |
51 |
Sheet |
CNM5941 |
|
12 |
Tuner Amp Unit |
CWM6253 |
52 |
Lighting Conductor |
CNV5527 |
|
13 |
Screw |
BPZ26P080FMC |
53 |
Connector |
CNV5531 |
|
14 |
Screw |
BSZ26P080FMC |
54 |
Grille Unit |
CXB4147 |
|
15 |
Screw |
BSZ26P160FMC |
55 |
Button |
CAC5180 |
|
16 |
Tuner Unit |
CWE1430 |
56 |
Spring |
CBH1834 |
|
17 |
Holder |
CNC6122 |
57 |
Spring |
CBH1835 |
|
18 |
Pin Jack(CN301) |
CKB1028 |
58 |
Spring |
CBH2182 |
|
19 |
Plug(CN603) |
CKM1270 |
59 |
Bracket |
CNC6135 |
|
20 |
Connector(CN701) |
CKS3408 |
60 |
Bracket |
CNC6791 |
|
21 |
Connector(CN602) |
CKS3568 |
61 |
Arm |
CNV4692 |
|
22 |
Connector(CN601) |
CKS3581 |
62 |
Arm |
CNV4693 |
|
23 |
Antenna Cable(CN403) |
CDH1274 |
63 |
Arm |
CNV4951 |
|
24 |
Panel |
CNB2491 |
64 |
Panel Unit |
CXB3019 |
|
25 |
Holder |
CNC2218 |
65 |
Door |
CAT2028 |
|
26 |
Holder |
CNC6845 |
66 |
Spring |
CBH1838 |
|
27 |
Holder |
CNC7996 |
67 |
Screw |
IMS20P030FZK |
|
28 |
Heat Sink |
CNR1505 |
68 |
Case Assy |
CXB3520 |
|
29 |
Chassis Unit |
CXB3012 |
69 |
Cassette Mechanism ModuleEXK3695 |
||
30 |
Screw |
ISS26P055FUC |
70 |
IC(IC302) |
TDA7384 |
|
31 |
Holder |
CNC6798 |
71 |
Transistor(Q904) |
2SD2396 |
|
32 |
Detach Grille Assy |
CXB4247 |
72 |
Holder |
CNC4963 |
|
33 |
Screw |
BPZ20P060FMC |
73 |
Sheet |
CNM6292 |
|
34 |
Screw |
BPZ20P100FZK |
74 |
Sheet |
CNM6293 |
|
35 |
Button(Detach) |
CAC5789 |
|
|
|
|
36 |
Button(1-6) |
CAC5794 |
|
|
|
|
37 |
Button(-) |
CAC5930 |
|
|
|
|
38 |
Button(EQ) |
CAC6135 |
|
|
|
|
39 |
Button(+) |
CAC5783 |
|
|
|
|
40 |
Button(Eject) |
CAC5793 |
|
|
|
|
5
KEH-P4850J
2.3 CASSETTE MECHANISM MODULE
6
KEH-P4850J
- CASSETTE MECHANISM MODULE SECTION PARTS LIST
Mark No. Description |
Part No. |
Mark No. Description |
Part No. |
|||
|
|
|
|
|
|
|
1 |
Screw |
BSZ20P040FMC |
46 |
Pinch Holder |
ENV1486 |
|
2 |
Washer |
CBF1037 |
47 |
Reel Unit |
EXA1543 |
|
3 |
Washer |
CBF1038 |
48 |
Head Base Unit |
EXA1457 |
|
4 |
Washer |
CBG1003 |
49 |
Lever Unit |
EXA1438 |
|
5 |
Deck Unit |
EWM1021 |
50 |
Gear Unit |
EXA1574 |
|
6 |
Screw |
EBA1028 |
51 |
Frame Unit |
EXA1458 |
|
7 |
Screw |
EBA1037 |
52 |
Lever Unit |
EXA1439 |
|
8 |
Spring |
EBH1531 |
53 |
Head Assy(HD1) |
EXA1506 |
|
9 |
Spring |
EBH1575 |
54 |
Motor Unit(M1) |
EXA1490 |
|
10 |
Plug(CN251) |
CKS3540 |
55 |
Washer |
HBF-179 |
|
11 |
Spring |
EBH1515 |
56 |
Screw |
BMZ20P022FMC |
|
12 |
Spring |
EBH1587 |
57 |
Spring |
EBH1545 |
|
13 |
Spring |
EBH1517 |
58 |
Washer |
YE20FUC |
|
14 |
Spring |
EBH1518 |
59 |
Pinch Holder Unit |
EXA1529 |
|
15 |
••••• |
|
60 |
Pinch Holder Unit |
EXA1528 |
|
16 |
Spring |
EBH1537 |
|
|
|
|
17 |
Cord |
EDD1020 |
|
|
|
|
18Photo-interrupter(EGN2,3) EGN1006
19Photo-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 |
7
1 |
|
2 |
|
3 |
|
4 |
|
|
|
KEH-P4850J
3. SCHEMATIC DIAGRAM
3.1 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)
A
Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS
LIST”.
|
|
|
|
|
|
Large size |
|
|
|
|
|
|
SCH diagram |
|
A-a |
|
|
A-b |
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
A-a |
A-b |
Guide page |
|
B
Detailed page
A-a A-b
C
D
8 A
A-a
B TUNER UNIT
PM2006A
7.2MHz
4R7/16
D |
TAPE: -9dBs |
DECK UNIT |
|
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 |
FM: -15.5dBs
AM: -22dBs
C
CN1
KEYBOARD UNI
1 |
2 |
3 |
4 |
5 |
|
6 |
|
A-b
A TUNER AMP UNIT
ELECTRONIC VOLUME
332/16 |
3300/16 |
FM: +9.6dBs |
POWER AMP |
AM: -3.1dBs |
|
TAPE: -4dBs |
|
CD: +10.3dBs |
|
IP-BUS DRIVER |
|
|
RESET |
4.194MHz |
|
|
8V REGULATER |
SYSTEM CONTROLLER |
|
PE5053A |
|
|
CD: +2.2dBs |
1901 |
|
IT |
|
5 |
6 |
7 |
|
8 |
|
KEH-P4850J
A
TAPE: -4.2dBs
FM: +35.6dBs
AM: +29.1dBs
TAPE: +22.0dBs
CD: +36.3dBs
B
600 H CEK1136
C
IP-BUS
D
A 9
7 |
|
8 |
|
||
|
A
B
1 |
2 |
3 |
4 |
KEH-P4850J |
|
|
|
a A-b |
ELE |
|
IP-BUS DR |
A- |
|
|
|
|
-15.5dBs |
-22dBs |
|
|
FM: |
AM: |
|
C
B TUNER UNIT
D
PM2006A
7.2MHz
4R7/16
10 A-a
1 |
2 |
3 |
4 |
5 6
SYSTEM CON |
PE5053A |
TAPE: -9dBs
D |
DECKUNIT |
|
7 |
|
8 |
|
KEH-P4850J
CN1901 |
UNIT |
C |
KEYBOARD |
circuit diagrams, their resistance values or |
in codes: |
|
|
For resistors and capacitors in the |
capacitance values are expressed |
Ex. *Resistors Code Practical value 123 12k ohms 103 10k ohms |
*Capacitors Code Practical value 103 10kpF(0.01uF) 101/10 100uF/10V |
A-a A-b
A-a 11
A
B
C
D
5 |
|
6 |
|
7 |
|
|
|
|
|
|
|||
|
|
8 |
||||
|
|
|
|
|
||
|
D |
C |
B |
A |
12 |
|
|
|
A-a A-b |
|
|
|
|
|
A1 |
|
|
A TUNER AMP UNIT |
|
- |
|
|
|
|
b |
ELECTRONIC VOLUME |
|
|
|
|
|
|
|
TAPE: -4.2dBs |
2 |
3300/16 |
FM: +35.6dBs |
332/16 |
CD: +36.3dBs |
|
|
|
AM: +29.1dBs |
TAPE: +22.0dBs
FM: +9.6dBs |
POWER AMP |
AM: -3.1dBs |
|
TAPE: -4dBs |
|
CD: +10.3dBs |
|
3 |
US DRIVER |
RESET |
4 |
4.194MHz |
600 H CEK1136
8V REGULATER
1 P4850J-KEH
2
3
4
5 |
|
6 |
|
7 |
|
|
CD: +2.2dBs
IP-BUS
8V REGULATER
M CONTROLLER |
PE5053A |
|
5 |
6 |
7 |
8
KEH-P4850J
A-a A-b
A-b 13
8
A
B
C
D
1 |
|
2 |
|
3 |
|
4 |
|
|
|
KEH-P4850J
3.2 TUNER UNIT
A
A
B
B
C |
PA4023B |
D
14 B
1 |
2 |
3 |
4 |
5 |
|
6 |
|
7 |
|
8 |
|
|
|
KEH-P4850J
A
B
C
D
B 15
5 |
|
6 |
|
7 |
|
8 |
|
|
|
||||
|
|
|
Loading...