Pioneer KEH-1900 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-ZZY. NOV. 1999 Printed in Japan
ORDER NO.
CRT2424
HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-1900 X1M/UC
Service
Manual
CONTENTS
1. SAFETY INFORMATION............................................2
2. EXPLODED VIEWS AND PARTS LIST ......................2
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ....8
4. PCB CONNECTION DIAGRAM................................18
5. ELECTRICAL PARTS LIST........................................26
6. ADJUSTMENT.........................................................30
7. GENERAL INFORMATION.......................................32
7.1 DISASSEMBLY ..................................................32
7.2 PARTS ................................................................33
7.2.1 IC...............................................................33
7.2.2 DISPLAY ...................................................36
8. OPERATIONS AND SPECIFICATIONS....................37
KEH-1950 X1M/ES
KEH-1900/X1M/UC
-This service manual should be used together with the following manual(s):
Model No. Order No. Mech. Module Remarks
CX-644 CRT1800 2M Cassette Mech. Module:Circuit Description, Mech.Description, Disassembly
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6
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2
9
8
7
5
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14
19
18
11
15
13
12
116
20
17
2
KEH-1900,1950
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
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
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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3
KEH-1900,1950
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
Part.No
Mark No. Description KEH-1900/X1M/UC KEH-1950/X1M/ES
* 1 Accessory Assy CEA2350 CEA2350
2 Spring CBH1650 CBH1650
3 Screw Assy CEA2351 CEA2351
4 Screw CBA1304 CBA1304
* 5 Polyethylene Bag CEG-127 CEG-127
6 Screw CRZ50P090FMC CRZ50P090FMC
7 Screw TRZ50P080FMC TRZ50P080FMC
* 8 Polyethylene Bag CEG-158 CEG-158
9 Handle CNC5395 CNC5395
10 Bush CNV3930 CNV3930
11 Polyethylene Bag CEG1173 CEG-162
12 Carton CHG3913 CHG3914
13 Contain Box CHL3913 CHL3914
14 Protector CHP1622 CHP1622
15 Protector CHP1623 CHP1623
16 Owner’s Manual CRD3099 CRD3097
17 Installation Manual CRD3100 CRD3098
18 Case Assy CXB3520 CXB3520
19 Cord Assy CDE6145 CDE6145
* 20 Card ARY1048 Not used
-Owner's Manual
Model Part No. Language
KEH-1900/X1M/UC CRD3099 English, French, Spanish
KEH-1950/X1M/ES CRD3097 English, Spanish, Portuguese(B), Chinese, Arabic
-Installation Manual
Model Part No. Language
KEH-1900/X1M/UC CRD3100 English, French, Spanish
KEH-1950/X1M/ES CRD3098 English, Spanish, Portuguese(B), Chinese, Arabic
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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4
KEH-1900,1950
2.2 EXTERIOR
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5
KEH-1900,1950
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BSZ26P050FMC
2 Screw BSZ30P055FUC
3 Screw BSZ30P060FMC
4 Screw BSZ30P100FMC
5 Cord Assy CDE6145
6 Case CNB2481
7 Holder CNC5704
8 Insulator CNM5025
9 Cushion CNM5210
10 Panel CNS5214
11 Tuner Amp Unit See Contrast table(2)
12 Screw BPZ26P080FMC
13 Screw BSZ26P080FMC
14 Screw BSZ26P140FMC
15 FM/AM Tuner Unit See Contrast table(2)
16 Holder CNC6554
17 Pin Jack(CN401) CKB1028
18 Plug(CN603) CKM1270
19 Connector(CN601) CKS3362
20 Connector(CN602) CKS3581
21 Antenna Jack(CN301) CKX1056
22 Panel CNB2247
23 Holder CNC5399
24 Holder CNC6216
25 Heat Sink CNC6217
26 Holder CNC6531
27 Holder CNC6845
28 Chassis Unit CXA9851
29 Holder Unit CXB2687
30 Detach Grille Assy See Contrast table(2)
31 Screw BPZ20P120FZK
32 Button(EJECT) CAC5870
33 Button(REW) CAC5872
34 Button(FF) CAC5874
35 Button(CROSS) CAC6295
36 Button(TUNER/BAND) CAC6297
37 Button(1-6) CAC6300
38 Button(DETACH) CAC6301
39 Spring CBH1836
40 Spring CBH2307
41 Cover CNS5696
42 Keyboard Unit CWM6745
43 LCD(LCD901) CAW1568
44 Connector(CN901) CKS3580
45 Holder CNC8525
46 Sheet CNM6486
47 Lighting Conductor CNV5969
48 Rubber CNV5970
49 Connector CNV5972
50 Grille Unit See Contrast table(2)
51 Button CAC4836
52 Spring CBH1834
53 Spring CBH1835
54 Spring CBH2367
55 Bracket CNC6135
56 Bracket CNC6791
57 Arm CNV4692
58 Arm CNV4693
59 Arm CNV4728
60 Panel Unit CXB4926
61 Door CAT2109
62 Spring CBH1838
63 Screw IMS20P030FZK
64 Fuse(10A) CEK1136
65 Cassette Mechanism Assy EXK3410
66 IC(IC501) TDA7384
67 Transistor(Q804) 2SD2395
* 68 Cord See Contrast table(2)
69 Holder See Contrast table(2)
(2) CONTRAST TABLE
KEH-1900/X1M/UC and KEH-1950/X1M/ES are constructed the same except for the following:
Part No.
Mark No. Description KEH-1900/X1M/UC KEH-1950/X1M/ES
11 Tuner Amp Unit CWM6742 CWM6744
15 FM/AM Tuner Unit CWE1467 CWE1486
30 Detach Grille Assy CXB4673 CXB4674
50 Grille Unit CXB4633 CXB4634
* 68 Cord CDC1043 Not used
69 Holder CNC8818 Not used
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

6
KEH-1900,1950
2.3 CASSETTE MECHANISM ASSY
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

7
KEH-1900,1950
1 Screw BSZ23P050FMC
2 Washer CBG1003
3 Connector(CN1) CKS2829
4 Screw(M2x5) EBA1038
5 Screw(M2x2.5) EBA1037
6 Spring EBH1554
7 Spring EBH1555
8 Spring EBH1556
9 Spring EBH1603
10 Spring EBH1591
11 Spring EBH1559
12 Spring EBH1593
13 Spring EBH1561
14 Spring EBH1562
15 Spring EBH1563
16 Spring EBH1623
17 Spring EBH1565
18 Spring EBH1566
19 Spring EBH1567
20 Spring EBH1568
21 Spring EBH1569
22 Spring EBH1571
23 Spring EBH1579
24 Head Base ENC1475
25 Lever ENC1429
26 Lever ENC1430
27 Lever ENC1431
28 Lever ENC1432
29 Arm ENC1433
30 Arm ENC1434
31 Arm ENC1480
32 Arm ENC1493
33 Bracket ENC1477
34 Lever ENC1483
35 Arm ENC1524
36 Frame ENC1440
37 Holder ENC1441
38 Lever ENC1446
39 Lever ENC1478
40 Belt ENT1027
41 Gear ENV1504
42 Gear ENV1470
43 Gear ENV1471
44 Lever ENV1472
45 Gear ENV1510
46 Gear ENV1475
47 Gear ENV1512
48 Gear ENV1513
49 Gear ENV1502
50 Lever ENV1480
51 Lever ENV1487
52 •••••
53 Arm ENV1519
* 54 PCB ENP1161
55 •••••
56 Switch(FWD)(REV)(S3) ESH1006
57 Switch(Load)(S1) ESN1016
58 Switch(Mute)(S2) ESN1017
59 Head Assy(HD1) EXA1466
60 Motor Unit(M1) EXA1467
61 Flywheel Unit EXA1547
62 •••••
63 Arm Unit EXA1447
64 Arm Unit EXA1448
65 Arm Unit EXA1534
66 Reel Unit EXA1450
67 Pinch Holder ENV1466
68 Pinch Roller ENV1518
69 Pinch Holder ENV1467
70 •••••
71 Chassis Unit EXA1498
72 Arm ENV1524
73 Washer HBF-167
74-78 •••••
79 Cover ENC1452
80 Washer CBF1051
81 Spring EBH1592
Mark No. Description Part No. Mark No. Description Part No.
-CASSETTE MECHANISM ASSY SECTION PARTS LIST
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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KEY MATRIX
HEAD
M
MOTOR
FWD
Lch
REV
Lch
FWD-L
REV-L
Q808
Q806
Q807
Q805
FM SWITCH AM SWITCH
FM AM
FIX+B
VCO
AMIF
EO
Q303
Q302
LOOP FILTER
313 654 51
X601
4.5MHz
25 24
EO
AMIF
VCOIN
FM
AM
XI
XO
SL
FMSD
14
12
SYSTEM CONTROLLER
IC 601 (1/2)
PE5107A
SL
FMSD
Q804
9V REGULATOR
FIX+B
Q803
Q802 B.U
SYSPW
ILL+B
ILL+B
IL901-903
FM
OSC
Q201 Q202
FMTV
AM
OSC
AMIFC
VCO
FM+B AM+B TUN+B
FMSD
25
26
19 20 15 17 21 14 13 6
7
9
18
41 9 10 14 15 17 19 47 1 2
19
43
40
28
30
31
252318
16
36
3238
6
34
Q3
FM RF T31
FM/AM MIX Q31 CF51 FM/AM IF CF52 FM IF CF53
FM IF T51
FMSL
AMSL
AMTV
AMRF/AGC CF232 AM IF
FM/AM PROCESSOR
IC 1 PA4023B FM PROCESSOR
IC 2 PA4024A
TUN-L
FIX+B
A
B
C
D
KEYBO
FM/AM TUNER UNIT
TUNER AMP UNIT
CN301
ANT
8
KEH-1900,1950
A
1234
B
C
D
1234
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
-KEH-1900/X1M/UC
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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9
KEH-1900,1950
5678
A
B
C
D
5678
IC 501
TDA7384
FL+
FL-
RL+
RL-
MUTE
STBY
FL
RL
POWER AMP 9
7
17
19
FL+
FL-
RL+
RL-
6
5
8
9
7
2
1
22
4
SYSPW
Q501
Q609
Q502
Q607
MUTE
Q608
DMINH
Q606
FUSE
10A
B.U
B.U
ACC
CE
VDD1
VDD2
VDD
Q603
Q604
Q605
Q801
IC 801
TPD1018F
B REMOTE
BRE
CN603
1
SYSPW 6
5
B.U
SYSPW
SYSPW
437
4039
CE
DMINH
MUTE
11
15
19
20
IC 401
SN761029DL
ELECTRONIC
VOLUME
VDT/VCK/VST
2
3
3
IC 201
LA3161P
CASSETTE
EQUALIZER
1
B.U
FIX+B
4
MUTE
Q601
63
TAPLD
12
NOR/REV
MCMUT
LOAD
B.U
MECPW
50
Q809
Q810
MECPW
MECHA
POWER SWITCH
MECHA MUTE
MUTE
Q403
RL OUT RL
Q602
SWVDD
18
VDD
SWVDD
9
10 LCK
LDT
4
3
5
6
CN602
ILL+B
SW5V
SCK
SIO
4
3
5
6
IC 901
PDC045A
KEY/LCD
DRIVER
RES
SCK
SO
SI
VDD
24
17
15
14
13
MATRIX
LCD 901
CAW1568
CN901
SYSTEM CONTROLLER
IC 601 (2/2)
PE5107A
MUTE SWITCH
LOAD SWITCH
FWD/REV
FWD/REV SWITCH
GND
1
10
6
8
4
9
1
10
6
8
4
9
CN601
FWD-L
REV-L
ILL+B
03
Q401
TUN-L
FL
SPEAKER
RL
SPEAKER
ACC
BATTERY
B REMOTE
DCASSETTE PCB
EYBOARD UNIT
CN401
REAR Lch OUT
FL+
FL-
RL+
RL-
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

10
KEH-1900,1950
A
1234
B
C
D
1234
A-a A-b
A-a A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page
ES ONLY
UC ONLY ES ONLY
UC ONLY
ES ONLY
R313 10K 22K
C313 R022 R047 C314 R01 R001
UC ES
***
*** ***
SYSTEM CONTROLLER
EQ AMP
ELECTRONIC VOLU
TUNER AMP UNIT
A
FM/AM TUNER UNIT
B
CASSETTE PCB
D
-73dBs
-29.0dB
AM : -26.0dBs
FM : -20.0dBs
A
D
3.2 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
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com