Pioneer KEH-P490 User manual

PIONEER 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 CORPORATION 1999 K-ZZB. DEC. 1999 Printed in Japan
ORDER NO.
CRT2404
MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-P490 X1N/UC
Service
Manual
KEH-P4900 X1N/UC
KEH-P4950 X1N/ES
-This service manual should be used together with the following manual(s):
Model No. Order No. Mech. Module Remarks
CX-1011 CRT2406 3L Cassette Mech. Module : Mechanism Description
Disassembly ,Adjustment
KEH-P490/X1M/UC CRT2398
KEH-P4900/X1M/UC CRT2398
KEH-P4950/X1M/ES CRT2398

2
KEH-P490,P4900,P4950
EXPLODED VIEWS AND PARTS LIST
PACKING (Page 2)
-PACKING SECTION PARTS LIST
Part No.
Mark No. Description KEH-P490/X1M/UC KEH-P490/X1N/UC
12 Carton CHG3893 CHG3905
13 Contain Box CHL3893 CHL3905
14 Protector CHP2244 CHP2252
15 Protector CHP2243 CHP2251
Part No.
Mark No. Description KEH-P4900/X1M/UC KEH-P4900/X1N/UC
12 Carton CHG3889 CHG3902
13 Contain Box CHL3889 CHL3902
14 Protector CHP2244 CHP2252
15 Protector CHP2243 CHP2251
Part No.
Mark No. Description KEH-P4950/X1M/ES KEH-P4950/X1N/ES
12 Carton CHG3890 CHG3903
13 Contain Box CHL3890 CHL3903
14 Protector CHP2244 CHP2252
15 Protector CHP2243 CHP2251
EXTERIOR (Page 4)
-EXTERIOR SECTION PARTS LIST
Part No.
KEH-P490/X1M/UC KEH-P490/X1N/UC
KEH-P4900/X1M/UC KEH-P4900/X1N/UC
Mark No. Description KEH-P4950/X1M/ES KEH-P4950/X1N/ES
29 Holder Unit CXB2687 CNC6798(Holder)
68 Cassette Mechanism Module EXK4000 EXK4005

3
KEH-P490,P4900,P4950
1234
A
B
C
D
1234
IC,Q
IC251
Q351
Q352
ADJ
VR302
VR301
IC253
CN252
CN254
CN253
CN255
M1
M2
HEAD ASSY
CN256
21
22
1
2
3
4
5
6
S3
70µs SW
S1
LOAD SW
S2
MODE SW
CN256
EGN1
REEL SENSE
PCB CONNECTION DIAGRAM
CASSETTE MECHANISM MODULE
DACN602
E
DCN253
DECK UNIT
DDECK UNIT
EREEL SENSE UNIT
SIDE A
SIDE B

4
KEH-P490,P4900,P4950
A
1234
B
C
D
1234
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
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 0R
C403 R0
R403 82
C402
3900P
C401
R33
R402
R401
4R7K
R323 0R0
R257
1K
C255
R01
C272 R1
C313 100P
R286 0R0
R285 0R0
HD1
HEAD ASSY
EXA1592
TEST TAPE
NCT-150
(400Hz, 200nWb/m)
RL
RR
FR
FL
C302
R1
C301
R1
R304
R302
16K
16K
R305
16K
R303
16K
-6dBs(388mV)±1dB
Fwd-R
Fwd-L
Rev-R
Rev-L
PBFB2
PBRIN2
PBGND
PBFIN2
VCT
PBREF
PBFIN1
PBGND
PBRIN1
PBFB1
PBTC1
PBOUT1
OUTREF1 TAPEIN1 VCC
LINEOUT1
TCH1
MSLPF
MSMODE
DRSW
TAPESW
MUTESW
MSOUT
MSTC
G1FB
G2FB
PBTC2
PBOUT2
OUTREF2
TAPEIN2
GND
DIREF
LINEOUT2
TCH2
MSSW
CN252
CN251
EQ AMP
IC251
D

5
KEH-P490,P4900,P4950
5678
A
B
C
D
5678
REEL SENSE
PCB
SWITCHES:
REEL SENSE PCB
S1:LOAD SWITCH..........EJECT-PLAY
S2:MODE SWITCH............ON-OFF
The underlined indicates the switch position.
R290 0R0
C403 R068
R403 82K
C402
3900P
C401
R33
R402 18K
R401
4R7K
R351 1K
R352 1K
R353 1K
R354 1K
R373 0R0
R355 270K
C352 3900P
R362 300
C351 R22
C353 R01
C354 R01
R374 0R0
C356 R01
C355 R1
D352 1SS355
M1 MOTOR UNIT
(MAIN MOTOR)
EXA1491
S1 LOAD
ESG1007
S2
ESG1007
MODE
REEL SENSE
EGN1
EGN1004
M2
MOTOR UNIT
(SUB MOTOR)
EXA1580
RS3
RS2
RS1
SC2
SC1
TAB
MC
CE
VCC2
NC
VCC
MCS
RRS
FRS
RSB
C
TAB
MS2
NC
NC
MM
SM1
RSB
GND
RS
mtl
MCS
load
CN255
CN253 CN256
CN254
MECHANISM
DRIVER
IC351 PA2020A
E

6
KEH-P490,P4900,P4950
CASSETTE MECHANISM MODULE

7
KEH-P490,P4900,P4950
1 Screw BSZ20P040FMC
2 Washer CBF1037
3 Washer CBG1003
4 Screw EBA1028
5 Screw CBA1037
6 Spring EBH1531
7 Spring EBH1624
8 Spring EBH1625
9 Spring EBH1626
10 Spring EBH1627
11 Spring EBH1628
12 Cord EDD1024
13 Photo-reflector(EGN1) EGN1004
14 Arm ENC1526
15 Lever ENC1530
16 Lever ENC1531
17 Arm ENC1532
18 Frame ENC1533
19 Holder ENC1534
20 Gear ENC1535
21 Arm ENC1536
22 Roller ENR1040
23 Belt ENT1027
24 Collar ENV1508
25 Arm ENV1539
26 Arm ENV1540
27 Gear ENV1544
28 Gear ENV1547
29 Gear ENV1548
30 Worm Wheel ENV1550
31 Lever ENV1551
32 Flywheel ENV1554
33 Gathering PCB ENX1054
34 Switch(S1,S2) ESG1007
35 Deck Unit EWM1023
36 Plug(CN251) CKS3540
37 Gathering PCB ENX1053
38 Motor Unit(M1) EXA1491
39 Motor EXM1028
40 Head Assy(HD1) EXA1592
41 Motor Unit(M2) EXA1580
42 Screw BMZ20P022FMC
43 Bracket ENC1528
44 Chassis Unit EXA1582
45 Pinch Holder Unit EXA1584
46 Pinch Roller ENV1518
47 Pinch Holder Unit EXA1583
48 Pinch Roller ENV1518
49 Reel Unit EXA1585
50 Head Base Unit EXA1586
51 Lever Unit EXA1587
52 Gear Unit EXA1588
53 Motor Unit(Service) EXX1055
54 Washer HBF-179
55 Screw CBA1250
56 Bracket ENC1542
Mark No. Description Part No. Mark No. Description Part No.
-CASSETTE MECHANISM MODULE SECTION PARTS LIST

PIONEER 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 CORPORATION 1999 K-ZZB. OCT. 1999 Printed in Japan
ORDER NO.
CRT2398
MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-P490 X1M/UC
Service
Manual
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST.......................2
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM .....9
4. PCB CONNECTION DIAGRAM ................................24
5. ELECTRICAL PARTS LIST ........................................33
6. ADJUSTMENT..........................................................40
7. GENERAL INFORMATION .......................................42
7.1 DISASSEMBLY ...................................................42
7.2 PARTS .................................................................43
7.2.1 IC.................................................................43
7.2.2 DISPLAY .....................................................47
8. OPERATIONS AND SPECIFICATIONS.....................48
KEH-P490/X1M/UC
KEH-P4950 X1M/ES
KEH-P4900 X1M/UC
-This service manual should be used together with the following manual(s):
Model No. Order No. Mech. Module Remarks
CX-1011 CRT2406 3L Cassette Mech. Module:Mech.Description and Greasing, Disassembly, Adjustment
- 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-P490,P4900,P4950
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
3
6
10
2
9
8
7
5
4
15
17
18
11
14
13
12
16
1
19
20
1. SAFETY INFORMATION
CAUTION
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.
WARNING
This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of
California to cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 - Proposition 65
2

KEH-P490,P4900,P4950
3
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.
-Owner's Manual, Installation Manual
Model Part No. Language
KEH-P490/X1M/UC CRD3090 English, French
CRD3091 English, French
KEH-P4900/X1M/UC CRD3088 English, French, Spanish
CRD3089 English, French, Spanish
KEH-P4950/X1M/ES CRD3083 English, Spanish, Portuguese(B)
CRD3084 Chinese, Arabic
CRD3085 English, Spanish, Portuguese(B), Chinese, Arabic
-PACKING SECTION PARTS LIST
Part No.
Mark No. Description KEH-P490/X1M/UC KEH-P4900/X1M/UC KEH-P4950/X1M/ES
* 1 Accessory Assy CEA2350 CEA2350 CEA2350
2 Spring CBH1650 CBH1650 CBH1650
3 Screw Assy CEA2351 CEA2351 CEA2351
4 Screw CBA1304 CBA1304 CBA1304
* 5 Polyethylene Bag CEG-127 CEG-127 CEG-127
6 Screw CRZ50P090FMC CRZ50P090FMC CRZ50P090FMC
7 Screw TRZ50P080FMC TRZ50P080FMC TRZ50P080FMC
* 8 Polyethylene Bag CEG-158 CEG-158 CEG-158
9 Handle CNC5395 CNC5395 CNC5395
10 Bush CNV3930 CNV3930 CNV3930
11 Polyethylene Bag CEG1173 CEG1173 CEG-162
12 Carton CHG3893 CHG3889 CHG3890
13 Contain Box CHL3893 CHL3889 CHL3890
14 Protector CHP2244 CHP2244 CHP2244
15 Protector CHP2243 CHP2243 CHP2243
16-1 Owner’s Manual CRD3090 CRD3088 CRD3083
16-2 Owner’s Manual Not used Not used CRD3084
16-3 Installation Manual CRD3091 CRD3089 CRD3085
* 16-4 Warranty Card CRY1070 CRY1070 Not used
* 16-5 Card Not used ARY1048 Not used
17 Cord assy CDE6222 CDE6222 CDE6222
18 Case assy CXB3520 CXB3520 CXB3520
19 Battery CEX1030 Not used Not used
20 Remote Control Unit CXB4284 Not used Not used