Document
Service
Manual
KEH-1900/X1M/UC
ORDER NO.
CRT2424
HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-1900
KEH-1950
X1M/UC
X1M/ES
- This service manual should be used together with the following manual(s):
Model No.
CX-644
Order No.
CRT1800
Mech. Module Remarks
2M
Cassette Mech. Module:Circuit Description, Mech.Description, Disassembly
CONTENTS
1.
2.
3.
4.
5.
6.
SAFETY INFORMATION............................................2
EXPLODED VIEWS AND PARTS LIST ......................2
BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ....8
PCB CONNECTION DIAGRAM................................18
ELECTRICAL PARTS LIST........................................26
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
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
KEH-1900,1950
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. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
3
6
16
1
17
7
20
4
5
9
12
2
10
8
14
18
19
15
11
13
2
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
KEH-1950/X1M/ES
CEA2350
CBH1650
CEA2351
CBA1304
CEG-127
Mark No.
*
1
2
3
4
*
5
Description
Accessory Assy
Spring
Screw Assy
Screw
Polyethylene Bag
KEH-1900/X1M/UC
CEA2350
CBH1650
CEA2351
CBA1304
CEG-127
6
7
8
9
10
Screw
Screw
Polyethylene Bag
Handle
Bush
CRZ50P090FMC
TRZ50P080FMC
CEG-158
CNC5395
CNV3930
CRZ50P090FMC
TRZ50P080FMC
CEG-158
CNC5395
CNV3930
11
12
13
14
15
Polyethylene Bag
Carton
Contain Box
Protector
Protector
CEG1173
CHG3913
CHL3913
CHP1622
CHP1623
CEG-162
CHG3914
CHL3914
CHP1622
CHP1623
16
17
18
19
20
Owner’s Manual
Installation Manual
Case Assy
Cord Assy
Card
CRD3099
CRD3100
CXB3520
CDE6145
ARY1048
CRD3097
CRD3098
CXB3520
CDE6145
Not used
*
*
- Owner's Manual
Model
KEH-1900/X1M/UC
KEH-1950/X1M/ES
Part No.
CRD3099
CRD3097
Language
English, French, Spanish
English, Spanish, Portuguese(B), Chinese, Arabic
Part No.
CRD3100
CRD3098
Language
English, French, Spanish
English, Spanish, Portuguese(B), Chinese, Arabic
- Installation Manual
Model
KEH-1900/X1M/UC
KEH-1950/X1M/ES
3
KEH-1900,1950
2.2 EXTERIOR
4
KEH-1900,1950
(1) EXTERIOR SECTION PARTS LIST
Mark No.
1
2
3
4
5
Description
Screw
Screw
Screw
Screw
Cord Assy
Part No.
BSZ26P050FMC
BSZ30P055FUC
BSZ30P060FMC
BSZ30P100FMC
CDE6145
6
7
8
9
10
Case
Holder
Insulator
Cushion
Panel
CNB2481
CNC5704
CNM5025
CNM5210
CNS5214
11
12
13
14
15
Tuner Amp Unit
Screw
Screw
Screw
FM/AM Tuner Unit
See Contrast table(2)
16
17
18
19
20
Mark No.
36
37
38
39
40
Description
Button(TUNER/BAND)
Button(1-6)
Button(DETACH)
Spring
Spring
Part No.
CAC6297
CAC6300
CAC6301
CBH1836
CBH2307
41
42
43
44
45
Cover
Keyboard Unit
LCD(LCD901)
Connector(CN901)
Holder
CNS5696
CWM6745
CAW1568
CKS3580
CNC8525
Sheet
Lighting Conductor
Rubber
Connector
Grille Unit
CNM6486
CNV5969
CNV5970
CNV5972
See Contrast table(2)
46
47
48
49
50
See Contrast table(2)
Holder
Pin Jack(CN401)
Plug(CN603)
Connector(CN601)
Connector(CN602)
CNC6554
CKB1028
CKM1270
CKS3362
CKS3581
51
52
53
54
55
Button
Spring
Spring
Spring
Bracket
CAC4836
CBH1834
CBH1835
CBH2367
CNC6135
21
22
23
24
25
Antenna Jack(CN301)
Panel
Holder
Holder
Heat Sink
CKX1056
CNB2247
CNC5399
CNC6216
CNC6217
56
57
58
59
60
Bracket
Arm
Arm
Arm
Panel Unit
CNC6791
CNV4692
CNV4693
CNV4728
CXB4926
26
27
28
29
30
Holder
Holder
Chassis Unit
Holder Unit
Detach Grille Assy
CNC6531
CNC6845
CXA9851
CXB2687
Door
Spring
Screw
Fuse(10A)
See Contrast table(2)
61
62
63
64
65
Cassette Mechanism Assy
CAT2109
CBH1838
IMS20P030FZK
CEK1136
EXK3410
31
32
33
34
35
Screw
Button(EJECT)
Button(REW)
Button(FF)
Button(CROSS)
BPZ20P120FZK
CAC5870
CAC5872
CAC5874
CAC6295
66
67
68
69
IC(IC501)
Transistor(Q804)
Cord
Holder
BPZ26P080FMC
BSZ26P080FMC
BSZ26P140FMC
*
TDA7384
2SD2395
See Contrast table(2)
See Contrast table(2)
(2) CONTRAST TABLE
KEH-1900/X1M/UC and KEH-1950/X1M/ES are constructed the same except for the following:
Mark No.
11
15
30
50
*
68
69
Description
Tuner Amp Unit
FM/AM Tuner Unit
Detach Grille Assy
Grille Unit
Cord
Part No.
KEH-1900/X1M/UC
KEH-1950/X1M/ES
CWM6742
CWM6744
CWE1467
CWE1486
CXB4673
CXB4674
CXB4633
CXB4634
CDC1043
Not used
Holder
CNC8818
Not used
5
KEH-1900,1950
2.3 CASSETTE MECHANISM ASSY
6
KEH-1900,1950
- CASSETTE MECHANISM ASSY SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.
Screw
Washer
Connector(CN1)
Screw(M2x5)
Screw(M2x2.5)
BSZ23P050FMC
CBG1003
CKS2829
EBA1038
EBA1037
46
47
48
49
50
Gear
Gear
Gear
Gear
Lever
ENV1475
ENV1512
ENV1513
ENV1502
ENV1480
6
7
8
9
10
Spring
Spring
Spring
Spring
Spring
EBH1554
EBH1555
EBH1556
EBH1603
EBH1591
51
52
53
54
55
Lever
•••••
Arm
PCB
•••••
ENV1487
11
12
13
14
15
Spring
Spring
Spring
Spring
Spring
EBH1559
EBH1593
EBH1561
EBH1562
EBH1563
56
57
58
59
60
Switch(FWD)(REV)(S3)
Switch(Load)(S1)
Switch(Mute)(S2)
Head Assy(HD1)
Motor Unit(M1)
ESH1006
ESN1016
ESN1017
EXA1466
EXA1467
16
17
18
19
20
Spring
Spring
Spring
Spring
Spring
EBH1623
EBH1565
EBH1566
EBH1567
EBH1568
61
62
63
64
65
Flywheel Unit
•••••
Arm Unit
Arm Unit
Arm Unit
EXA1547
21
22
23
24
25
Spring
Spring
Spring
Head Base
Lever
EBH1569
EBH1571
EBH1579
ENC1475
ENC1429
66
67
68
69
70
Reel Unit
Pinch Holder
Pinch Roller
Pinch Holder
•••••
EXA1450
ENV1466
ENV1518
ENV1467
26
27
28
29
30
Lever
Lever
Lever
Arm
Arm
ENC1430
ENC1431
ENC1432
ENC1433
ENC1434
71
72
73
74-78
79
Chassis Unit
Arm
Washer
•••••
Cover
EXA1498
ENV1524
HBF-167
31
32
33
34
35
Arm
Arm
Bracket
Lever
Arm
ENC1480
ENC1493
ENC1477
ENC1483
ENC1524
36
37
38
39
40
Frame
Holder
Lever
Lever
Belt
ENC1440
ENC1441
ENC1446
ENC1478
ENT1027
41
42
43
44
45
Gear
Gear
Gear
Lever
Gear
ENV1504
ENV1470
ENV1471
ENV1472
ENV1510
1
2
3
4
5
*
80 Washer
81 Spring
ENV1519
ENP1161
EXA1447
EXA1448
EXA1534
ENC1452
CBF1051
EBH1592
7
1
2
3
4
KEH-1900,1950
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
A
- KEH-1900/X1M/UC
A
TUNER AMP UNIT
B
FM/AM TUNER UNIT
ILL+B
T31
Q31 CF51
FM/AM MIX FM/AM IF
Q3
FM RF
CN301
ANT
TUN-L
CF53
FM IF
CF52
FM IF
T51
25
26
FWD-L
41 9 10
Q201 Q202
6
38
18
32 36 16
AM
OSC
19 20
VCO
AMIFC
FMTV
AMTV
47
19
2
1
FM PROCESSOR
IC 2 PA4024A
23
25
28
31 30
15 17
FM+B
AM+B
7
40
REV
Lch
TUN+B
13
6
REV-L
HEAD
FMSL
AMSL
14
21
19
FWD
Lch
43
CF232 AM IF
AMRF/AGC
B
17
FMSD
FM
OSC
14 15
FM/AM PROCESSOR
IC 1 PA4023B
34
9
18
M
B.U
Q804
Q802
FIX+B
MOTOR
D
SYSPW
Q803
9V REGULATOR
ILL+B
SL
14
SL
12
FMSD
C
FMSD
C
KEYBO
FIX+B
VCO
AMIF
SYSTEM CONTROLLER
Q806
IL901-903
FIX+B
IC 601 (1/2)
Q805
PE5107A
Q302 Q303
3 13
6 54 51
25
KEY MATRIX
XO
XI
AM
VCOIN
Q807
AM SWITCH
FM
Q808
FM SWITCH
EO
LOOP FILTER
AM
AMIF
FM
EO
24
X601
4.5MHz
D
8
1
2
3
4
6
5
8
7
KEH-1900,1950
A
CN401
TUN-L
Q403
ILL+B
CASSETTE
EQUALIZER
FWD/REV SWITCH
1
1
1
2
IC 201
LA3161P
SN761029DL
3
19
11
20
15
IC 501
TDA7384
RL
STBY
RL+
RL-
MUTE
4
FIX+B
FL+
7
FL-
17
RL+
19
RL-
FL-
FL
4
9
FL+
POWER AMP
IC 401
3
Q401
MUTE
ELECTRONIC
VOLUME
FWD-L
REAR Lch OUT
RL
RL OUT
FL-
5
RL+
8
RL-
9
FL
SPEAKER
RL
SPEAKER
22
SYSPW
REV-L
B.U
6
6
VDT/VCK/VST
FWD/REV
MUTE SWITCH
8
8
MUTE
9
9
LOAD
4
4
10
10
LOAD SWITCH
GND
MECHA
POWER SWITCH
Q810
B
Q501
Q609
MUTE
Q502
Q607
B.U
CN601
FUSE
10A
MECPW
Q608
ACC
Q809
D
FL+
6
7
BATTERY
2
ACC
1
B REMOTE
DMINH
CASSETTE PCB
Q606
CE
Q601
VDD1
B.U
Q603
VDD2
VDD
MECHA MUTE
Q604
Q605
Q801
EYBOARD UNIT
4
4
3
3
C
CN603
SYSPW
SCK
9
10
39
40
7
CE
50
43
SYSPW
63
2
MUTE
1
DMINH
18
MECPW
SIO
TAPLD
5
6
NOR/REV
5
6
SWVDD
15
14
SO
13
SI
BRE
SWVDD
MCMUT
MATRIX
IC 901
PDC045A
SCK
1
VDD
Q602
17
RES
6
SYSPW
ILL+B
SW5V
24
VDD
KEY/LCD
DRIVER
IC 801
TPD1018F
CN602
CN901
03
B REMOTE
5
B.U
B.U
LCK
LDT
SYSTEM CONTROLLER
LCD 901
CAW1568
IC 601 (2/2)
PE5107A
D
9
5
6
7
8
1
2
3
4
KEH-1900,1950
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
A TUNER AMP UNIT
A
A-a
A-b
A-a
A-b
ELECTRONIC VOLU
Large size
SCH diagram
B FM/AM TUNER UNIT
Guide page
AM : -26.0dBs
FM : -20.0dBs
A-a
A-b
Detailed page
-29.0dB
ES ONLY
B
ES ONLY
***
UC ES
R313 10K 22K
C313 R022 R047
C314 R01 R001
***
***
ES ONLY
UC ONLY
UC ONLY
SYSTEM CONTROLLER
C
EQ AMP
-73dBs
D
10
A D
1
D CASSETTE PCB
2
3
4
6
5
8
7
KEH-1900,1950
A-b
A
FM : 100% 35.1dBs
AM : 30% 24.1dBs
TAPE : 315Hz 0dB 22.1dBs
UME
TAPE : -4.5dBs
dBs
POWER AMP
TAPE : -3.9dBs
AM : -0.9dBs
FM : 5.1dBs
B
TAPE : 22.1dBs
FUSE
ES ONLY
600µH
B.REMOTE
C
KEY/LCD DRIVER
CEL 1547
14V 40mA
D
***
C KEYBOARD UNIT
***
UC
ES
24P
C427
C428 27P 24P
A C
5
6
7
8
11
C
D
***
***
***
12
1
ES ONLY
UC ONLY
B FM/AM TUNER UNIT
ES ONLY
AM : -26.0dBs
FM : -20.0dBs
B
UC ES
R313 10K 22K
C313 R022 R047
C314 R01 R001
-29.0dBs
ELECTRONIC VOLUME
A-a A-b
2
A-a
2
2
1
1
ES ONLY
A
A TUNER AMP UNIT
KEH-1900,1950
3
3
4
4
D CASSETTE PCB
-73dBs
UC ONLY
EQ AMP
SYSTEM CONTROLLER
5
*
6
7
A-a A-b
6
UC ES
24P
C427
C428 27P 24P
***
4
3
5
7
KEH-1900,1950
8
A-a D
8
13
A
B
C
D
UC ONLY
14
A-b
1
POWER AMP
2
3
600µH
TAPE : 22.1dBs
TAPE : -4.5dBs
FUSE
2
2
1
C
TAPE : -3.9dBs
AM : -0.9dBs
FM : 5.1dBs
FM : 100% 35.1dBs
AM : 30% 24.1dBs
TAPE : 315Hz 0dB 22.1dBs
1
ES ONLY
A
A-a A-b
KEH-1900,1950
3
4
B
D
4
5
4
3
6
C KEYBOARD UNIT
A-a A-b
6
7
UC ES
24P
27
28 27P 24P
***
CEL 1547
14V 40mA
KEY/LCD DRIVER
B.REMOTE
5
7
KEH-1900,1950
8
A-b C
8
15
A
B
C
D
ES
16
1
2
2
3
B
C
2
3
1
D
B
3
4
KEH-1950/X1M/ES
D6 MA157
1
KEH-1900/X1M/UC
R1
2R2M
R2
2R2M
D2 RD39JS D1 RD39JS
KEH-1900,1950
4
3.3 FM/AM TUNER UNIT
A
FM/AM TUNER UN
B
5
6
8
7
KEH-1900,1950
A
A
IFC
R UNIT
B
C
D
B
5
6
7
8
17
1
2
3
4
KEH-1900,1950
4. PCB CONNECTION DIAGRAM
A
CORD ASSY
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
Connector
Capacitor
SIDE A
B
P.C.Board
A
Chip Part
SIDE B
TUNER AMP UNIT
C
D
A
18
1
2
3
4
6
5
8
7
KEH-1900,1950
SIDE A
A
B
D
CN1
C
B
D
C
5
CN901
A
6
7
8
19
1
2
3
4
2
3
4
KEH-1900,1950
A
TUNER AMP UNIT
A
B
C
D
20
A
1
5
6
7
8
KEH-1900,1950
SIDE B
A
B
C
D
A
5
6
7
8
21
1
2
3
4
KEH-1900,1950
4.2 FM/AM TUNER UNIT
SIDE A
A
A
B
B
FM/AM TUNER UNIT
C
D
22
B
1
2
3
4
2
1
4
3
KEH-1900,1950
SIDE B
A
B
B
FM/AM TUNER UNIT
C
D
B
1
2
3
4
23
1
2
3
4
KEH-1900,1950
4.3 KEYBOARD UNIT
SIDE B
SIDE A
A
KEYBOARD UNIT
BAND
C
TUNER
C
D
KEYBOARD UNIT
1
S
2
CN602
3
C
A
CLOCK
4
BSM
5
LOCAL
6
B
24
C
1
2
3
4
2
1
4
3
KEH-1900,1950
4.4 CASSETTE PCB
D
A
CASSETTE PCB
RR
S1
LOAD SW
FR
FL
M1
MOTOR
RL
M
HD1
FWD/REV
PB HEAD
CN1
5 7 9
1 3
S3
FWD/REV SW
2
4
B
S2
MUTE SW
8 10
6
A CN601
C
D
D
1
2
3
4
25
KEH-1900,1950
5. ELECTRICAL PARTS LIST
NOTE:
- Parts whose parts numbers are omitted are subject to being not supplied.
- The part numbers shown below indicate chip components.
Chip Resistor
RS1/_S___J,RS1/__S___J
Chip Capacitor (except for CQS.....)
CKS....., CCS....., CSZS.....
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
A
Part No.
-------------------------
Unit Number : CWM6742
(KEH-1900/X1M/UC)
: CWM6744
(KEH-1950/X1M/ES)
Unit Name
: Tuner Amp Unit
MISCELLANEOUS
IC
IC
IC
IC
IC
201
401
501
601
801
IC
IC
IC
IC
IC
LA3161P
SN761029DL
TDA7384
PE5107A
TPD1018F
Q
Q
Q
Q
Q
301
302
303
305
401
Transistor
Transistor
Transistor
Transistor (1900/X1M/UC)
Transistor
2SC1740S
2SC1740S
2SK330
2SC2498
DTC143TS
Q
Q
Q
Q
Q
402
403
501
502
601
Transistor
Transistor
Transistor
Transistor
Transistor
DTC143TS
DTA124ES
DTC124ES
DTC124ES
DTC114ES
Q
Q
Q
Q
Q
602
603
604
605
606
Transistor
Transistor
Transistor
Transistor
Transistor
2SA933S
DTA114ES
2SC1740S
2SC1740S
2SC1740S
Q
Q
Q
Q
Q
607
608
609
801
802
Transistor
Transistor
Transistor
Transistor
Transistor
2SC1740S
DTC124TS
DTC143TS
2SD1859
2SB1238
Q
Q
Q
Q
Q
803
804
805
806
807
Transistor
Transistor
Transistor
Transistor
Transistor
DTC124ES
2SD2395
2SA933S
2SA933S
DTC114ES
Q
Q
Q
D
D
808
809
810
201
301
Transistor
Transistor
Transistor
Diode
Diode
DTC114ES
DTC143TS
2SB1242
1SS270
MTZJ3R0(B)
D
D
D
D
D
302
303
601
602
603
Diode
Diode
Diode
Diode
Diode
1SS270
1SS270
1SS270
1SS270
1SS270
D
D
D
D
D
604
605
606
607
608
Diode
Diode
Diode
Diode
Diode
1SS270
HZS7L(A1)
1SS270
1SS270
1SS270
26
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
Part No.
-------------------------
D
D
D
D
D
609
610
611
612
613
Diode
Diode
Diode
Diode
Diode
HZS7L(A1)
HZS7L(C3)
HZS7L(B1)
1SS270
1SS270
D
D
D
D
D
614
615
616
617
801
Diode
Diode
Diode
Diode
Diode
1SS270
HZS9L(A2)
1SS270
1SS270
1SR139-400
D
D
D
D
D
802
803
804
805
806
Diode
Diode
Diode
Diode
Diode
1SR139-400
1SR139-400
1SR139-400
1SR139-400
HZS6L(B2)
D
L
L
L
X
807
601
602
801
601
Diode
Ferri-Inductor
Ferri-Inductor
Choke Coil 600µH
Crystal Resonator 4.500MHz
HZS9L(B3)
LAU2R2K
LAU2R2K
CTH1168
CSS1077
FM/AM Tuner Unit (1900/X1M/UC) CWE1467
FM/AM Tuner Unit (1950/X1M/ES) CWE1486
RESISTORS
R
R
R
R
R
201
202
203
204
205
RS1/10S104J
RS1/10S104J
RS1/10S472J
RS1/10S472J
RS1/10S470J
R
R
R
R
R
206
207
208
301
302
RS1/10S470J
RS1/10S273J
RS1/10S273J
RS1/10S102J
RS1/10S222J
R
R
R
R
R
303
304
305
306
307
(1900/X1M/UC)
(1900/X1M/UC)
RS1/10S222J
RD1/4PU102J
RS1/10S102J
RS1/10S101J
RS1/10S332J
R
R
R
R
R
308
309
310
311
312
(1900/X1M/UC)
(1900/X1M/UC)
(1900/X1M/UC)
(1900/X1M/UC)
(1900/X1M/UC)
RS1/10S331J
RS1/10S331J
RS1/10S821J
RS1/10S330J
RS1/10S680J
R
R
R
R
R
313
313
314
315
316
(1900/X1M/UC)
(1950/X1M/ES)
RS1/8S103J
RS1/8S223J
RD1/4PU103J
RS1/10S102J
RS1/10S472J
R
R
R
R
R
317
318
319
320
321
RS1/10S152J
RD1/4PU222J
RS1/10S222J
RS1/10S102J
RD1/4PU103J
KEH-1900,1950
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
Part No.
-------------------------
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
R
R
R
R
R
322
323
324
331
401
RS1/10S393J
RS1/10S0R0J
RS1/10S0R0J
RS1/8S0R0J
RS1/10S162J
CAPACITORS
R
R
R
R
R
402
403
405
406
407
RS1/10S162J
RS1/10S0R0J
RS1/10S272J
RS1/10S272J
RS1/10S151J
R
R
R
R
R
408
411
412
413
414
RS1/10S151J
RS1/10S821J
RS1/10S821J
RS1/10S223J
RS1/10S223J
R
R
R
R
R
415
501
502
503
504
RS1/10S182J
RS1/10S153J
RS1/10S221J
RS1/10S101J
RD1/4PU153J
R
R
R
R
R
601
602
603
604
605
RD1/4PU102J
RS1/10S473J
RS1/10S103J
RD1/4PU332J
RS1/10S473J
R
R
R
R
R
606
607
608
609
612
RS1/10S222J
RS1/10S222J
RD1/4PU473J
RS1/10S123J
RD1/4PU472J
R
R
R
R
R
613
614
615
616
617
RD1/4PU473J
RS1/10S473J
RS1/10S222J
RD1/4PU222J
RD1/4PU222J
R
R
R
R
R
618
621
622
623
624
RS1/10S1R0J
RD1/4PU222J
RS1/10S473J
RS1/10S472J
RS1/10S223J
R
R
R
R
R
625
626
627
628
629
RS1/10S103J
RS1/10S223J
RS1/10S103J
RS1/10S104J
RS1/10S223J
R
R
R
R
R
630
631
632
633
634
RS1/10S103J
RD1/4PU472J
RS1/10S472J
RS1/10S103J
RS1/10S223J
R
R
R
R
R
635
636
638
639
640
RD1/4PU152J
RD1/4PU103J
RS1/10S472J
RS1/10S472J
RS1/10S472J
R
R
R
R
R
801
803
804
805
806
RD1/4PU102J
RS1/10S103J
RS1/10S223J
RD1/4PU331J
RD1/4PU331J
R
R
R
R
R
807
808
809
810
811
RD1/4PU511J
RS1/10S472J
RS1/10S102J
RS1/10S472J
RS1/10S102J
R
R
R
R
R
812
813
814
815
816
RS1/10S472J
RD1/4PU102J
RD1/4PU1R5J
RD1/4PU1R5J
RD1/4PU103J
(1950/X1M/ES)
(1950/X1M/ES)
(1900/X1M/UC)
(1950/X1M/ES)
Part No.
-------------------------
C
C
C
C
C
201
202
203
204
205
CEJA2R2M50
CEJA2R2M50
CKSQYB333K25
CKSQYB333K25
CEJA101M10
C
C
C
C
C
206
207
208
209
301
CEJA101M10
CKSQYB681K50
CKSQYB681K50
CEJA101M10
CKSQYB473K25
C
C
C
C
C
302
303
304
305
306
CKSQYB104K16
CKSQYB223K50
CKSQYB104K16
CKSQYB223K50
CKSQYB102K50
C
C
C
C
C
307
308
309
310
311
CKSQYB103K50
CCSQCH101J50
CKSQYB103K50
CKSQYB681K50
CCSQCH101J50
C
C
C
C
C
312
313
313
314
314
(1900/X1M/UC)
(1900/X1M/UC)
(1950/X1M/ES)
(1900/X1M/UC)
(1950/X1M/ES)
CCSQCH101J50
CKSQYB223K50
CKLSR473K16
CKSQYB103K50
CKSQYB102K50
C
C
C
C
C
315
316
318
319
401
4.7µF/16V
CCH1250
CKSQYB103K50
CKSQYB223K50
CKSQYB223K50
CKSQYB473K25
C
C
C
C
C
402
403
404
405
406
CKSQYB473K25
CEJA1R0M50
CEJA1R0M50
CEJA1R0M50
CEJA1R0M50
C
C
C
C
C
407
408
409
410
411
CEJA100M16
CEJA100M16
CKSQYB822K50
CKSQYB822K50
CEJA1R0M50
C
C
C
C
C
412
413
414
415
416
CEJA1R0M50
CKSQYB153K50
CKSQYB153K50
CKSQYB104K16
CKSQYB104K16
C
C
C
C
C
417
418
419
420
421
CKSQYB104K16
CKSQYB104K16
CKSQYB104K16
CEJA470M10
CEJA2R2M50
C
C
C
C
C
422
423
424
425
426
CEJA4R7M35
CKSQYB473K25
CEJA1R0M50
CEJA2R2M50
CEJA2R2M50
C
C
C
C
C
427
428
428
501
502
C
C
C
C
C
503
504
505
506
507
(1900/X1M/UC)
(1900/X1M/UC)
(1950/X1M/ES)
(1900/X1M/UC)
(1950/X1M/ES)
CCSQCH240J50
CCSQCH270J50
CCSQCH240J50
CFTNA224J50
CFTNA224J50
CFTNA224J50
CFTNA224J50
CEJA330M10
CEJA2R2M50
CFTNA105J50
27
KEH-1900,1950
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
Part No.
-------------------------
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
C
C
C
C
C
508
510
601
602
603
CEJA100M16
CKSQYB104K50
CKSQYB104K16
CKSQYB102K50
CEJA4R7M35
RESISTORS
C
C
C
C
C
604
605
606
607
608
CKSQYB224K16
CKSQYB102K50
CCSQCH100D50
CCSQCH110J50
CKSQYB103K50
C
C
C
C
C
609
610
611
801
802
C
C
C
C
C
803
804
805
806
807
C
C
C
808
809
810
B
(1950/X1M/ES)
3300µF/16V
330µF/10V
330µF/10V
CKSQYB104K16
CKSQYB472K50
CKSQYB472K50
CCH1369
CKSQYB103K50
CKSYB103K50
CEAS331M16
CKSQYB102K50
CCH1181
CKSQYB103K50
CCH1181
CCSQCH101J50
CCSQCH101J50
Unit Number : CWE1467
(KEH-1900/X1M/UC)
: CWE1486
(KEH-1950/X1M/ES)
Unit Name
: FM/AM Tuner Unit
MISCELLANEOUS
IC
IC
Q
Q
Q
1
2
1
2
3
IC
IC
Transistor
Transistor
FET
PA4023B
PA4024A
2SC2412K
DTC124EU
3SK263
Q
Q
Q
Q
D
31
201
202
203
1
Transistor
FET
Transistor
Transistor
Diode
2SC2412K
2SK932
2SC2412K
DTC124EU
RD39JS
D
D
D
D
D
2
4
5
6
7
Diode
Diode
Diode
Diode
Diode
RD39JS
1SV250
KV1410-F1
MA157
KV1410-F1
D
D
D
D
L
8
201
202
231
2
Diode
Diode
Diode
Diode
Coil
KV1410-F1
MA157
MA157
SVC253
CTC1133
L
L
L
L
L
3
4
5
6
51
Inductor
Coil
Coil
Inductor (1950/X1M/ES)
Ferri-Inductor
LCTB2R2K2125
CTC1133
CTC1132
LCTBR15K1608
LAU150K
L
L
L
L
L
201
202
203
208
231
Ferri-Inductor
Ferri-Inductor
Inductor
Inductor
Inductor
LAU4R7K
LAU330K
LFEA102J
LAU121K
LCTA3R3J3225
T
T
CF
CF
CF
31
51
51
52
53
Coil
Coil
Ceramic Filter
Ceramic Filter
Ceramic Filter
CTE1116
CTC1159
CTF1441
CTF1441
CTF1441
CF
X
X
VR
232
151
231
154
Ceramic Filter
Radiator 918.5Hz
Crystal Resonator 10.26MHz
Semi-fixed 150kΩ(B)
CTF1348
CSS1365
CSS1111
CCP1213
28
Part No.
-------------------------
R
R
R
R
R
1
2
4
5
6
RS1/16S225J
RS1/16S225J
RS1/16S154J
RS1/16S391J
RS1/16S223J
R
R
R
R
R
7
8
9
10
11
RS1/16S123J
RS1/16S332J
RS1/16S473J
RS1/16S223J
RS1/16S124J
R
R
R
R
R
13
15
16
17
18
RS1/16S563J
RS1/16S271J
RS1/16S104J
RS1/16S332J
RS1/16S332J
R
R
R
R
R
31
32
33
34
35
RS1/16S470J
RS1/16S822J
RS1/16S822J
RS1/16S331J
RS1/16S331J
R
R
R
R
R
40
51
52
55
56
RS1/16S470J
RS1/16S271J
RS1/16S560J
RS1/16S102J
RS1/16S823J
R
R
R
R
R
61
62
101
102
103
RS1/16S392J
RS1/16S273J
RS1/16S272J
RS1/16S682J
RS1/16S333J
R
R
R
R
R
104
105
107
151
152
RS1/16S334J
RS1/16S683J
RS1/16S222J
RS1/16S222J
RS1/16S393J
R
R
R
R
R
155
156
157
160
161
RS1/16S273J
RS1/16S243J
RS1/16S203J
RS1/16S222J
RS1/16S563J
R
R
R
R
R
162
163
202
203
204
RS1/16S105J
RS1/16S223J
RS1/16S223J
RS1/16S225J
RS1/16S103J
R
R
R
R
R
206
207
208
209
214
RS1/16S220J
RS1/16S101J
RS1/16S102J
RS1/16S471J
RS1/16S822J
R
R
R
R
R
215
217
231
232
237
RS1/16S822J
RS1/16S102J
RS1/16S272J
RS1/16S473J
RS1/16S103J
R
R
R
R
R
238
239
240
241
243
RS1/16S104J
RS1/16S104J
RS1/16S332J
RS1/16S202J
RS1/16S183J
R
R
244
247
RS1/16S392J
RS1/16S123J
KEH-1900,1950
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
Part No.
-------------------------
CAPACITORS
C
C
C
C
C
1
2
4
6
8
CCSQCH6R0D50
CCSRCK2R0C50
CCSRCH820J50
CCSRCH820J50
CKSRYB103K25
C
C
C
C
C
9
10
11
12
13
CKSQYB104K16
CCSRCKR50C50
CEJA1R0M50
CKSRYB222K50
CKSRYB222K50
C
C
C
C
C
14
15
16
17
18
CCSRCH220J50
CCSRCH6R0D50
CCSRCH8R0D50
CKSRYB222K50
CKSRYB103K25
C
C
C
C
C
19
20
21
22
23
CKSRYB222K50
CKSRYB222K50
CEJA100M16
CCSRTH9R0D50
CCSRTH120J50
C
C
C
C
C
24
25
26
31
32
CCSRCH471J50
CKSRYB103K25
CCSRCH101J50
CKSRYB103K25
CKSQYB472K50
C
C
C
C
C
33
34
36
51
52
CCSRCH5R0C50
CKSQYB104K16
CCSRRH201J50
CKSRYB223K25
CKSRYB103K25
C
C
C
C
C
54
55
56
57
58
CCSRCH470J50
CKSQYB223K25
CKSQYB104K16
CKSRYB472K50
CEJA330M10
C
C
C
C
C
59
60
61
62
63
CKSRYB103K25
CKSRYB102K50
CCSRCH270J50
CKSRYB103K25
CEJAR22M50
C
C
C
C
C
101
102
103
104
105
CEJANP100M10
CKSRYB182K50
CKSRYB682K25
CEJA2R2M50
CKSRYB103K25
C
C
C
C
C
106
107
151
152
153
CCSRCH151J50
CKSRYB103K25
CKSRYB472K50
CKSQYB104K16
CEJA3R3M50
C
C
C
C
C
154
157
158
159
160
CKSQYB104K16
CEJA3R3M50
CKSYB474K16
CEJA220M6R3
CKSQYB104K16
C
C
C
C
C
161
162
163
170
201
CKSQYB104K16
CEJA3R3M50
CKSRYB102K50
CCSRCH100D50
CCSRCH471J50
C
C
C
C
C
202
203
204
205
206
CCSRCH100D50
CKSRYB332K50
CKSQYB473K16
CKSQYB473K16
CKSQYB104K16
(1900/X1M/UC)
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
Part No.
-------------------------
C
C
C
C
C
207
209
211
212
213
CCSRCH560J50
CKSQYB104K16
CCSRCH101J50
CEJA470M6R3
CKSRYB103K25
C
C
C
C
C
216
217
219
220
230
CCSRCH101J50
CEJA1R5M50
CCSRCH471J50
CKSRYB103K25
CKSRYB103K25
C
C
C
C
C
231
232
233
234
235
CCSRCH330J50
CCSRCH150J50
CKSQYB104K16
CEJA330M10
CKSRYB332K50
C
C
C
C
C
236
237
239
240
241
CKSQYB473K16
CCSRCH120J50
CKSRYB472K50
CEJAR47M50
CKSQYB104K16
C
C
C
C
C
242
243
244
245
246
CEJAR47M50
CEJAR33M50
CKSQYB473K16
CKSRYB333K16
CKSQYB473K16
C
250
CCSRCH471J50
C
Unit Number : CWM6745
Unit Name : Keyboard Unit
MISCELLANEOUS
IC
D
D
D
IL
901
901
902
903
901
IC
Diode
Diode
Diode
Lamp 14V 40mA
PDC045A
MA153
MA153
MA110
CEL1547
IL
902
IL
903
LCD 901
Lamp 14V 40mA
Lamp 14V 40mA
LCD
CEL1547
CEL1547
CAW1568
RESISTORS
R
R
R
R
R
901
902
905
906
907
RS1/10S222J
RS1/10S222J
RS1/10S682J
RS1/10S473J
RS1/10S472J
CAPACITORS
C
C
C
C
C
D
S
S
S
901
902
903
905
906
10µF/16V
CCSQCH181J50
CKSQYB103K50
CKSQYB103K50
CKSQYB104K16
CCH1370
Unit Number :
Unit Name : Cassette PCB
1
2
3
Swicth(Load)
Swicth(Mute)
Swicth(FWD/REV)
ESN1016
ESN1017
ESH1006
Miscellaneous Parts List
M
HD
1
1
Motor Unit
Head Assy
EXA1467
EXA1466
29
KEH-1900,1950
6. ADJUSTMENT
- Connection Diagram
BACK UP
+14.4V
ACC
GND
DC Regulated
Power Supply
GND
Lch +
Lch -
4Ω
Oscilloscope
mV Meter (1)
Rch +
Rch -
4Ω
Antenna Plug
Dummy Antenna
50Ω (37.5Ω )
FM SSG
Stereo
Modulator
50Ω (75Ω )
Antenna Jack
FM/AM TUNER UNIT (TOP VIEW)
TUNER AMP UNIT
L2
Pin26
FM/AM TUNER UNIT
Pin 19
L4
T31
Pin14
DC V
Meter(1)
L5
Pin13
VR154
T51
Pin1
FM/AM TUNER UNIT (BOTTOM VIEW)
T51
C63
30
Center
Meter
KEH-1900,1950
FM ADJUSTMENT
Modulation
M:MONO MOD., 400Hz 30%(22.5kHz Dev.) or 400Hz 100%(75kHz Dev.)
S:STEREO MOD., 1kHz, L or R=30%(20.25kHz+7.5kHz Dev.)
NOTE:Before proceeding to further adjustments after switching power ON, let the tuner run for ten minutes to allow
the circuits to stabilize.
KEH-1900/X1M/UC
FM SSG
No.
TUN Volt 1
IF
2
ANT Coil 3
RF Coil
4
IFT
5
ARC
6
Frequency(MHz)
•••••
98.1
98.1
98.1
98.1
M
M
M
M
98.1 S
Displayed
Level(dBf)
•••••
60—100
5
5
5
40
107.9
98.1
98.1
98.1
98.1
Adjustment
Point
L5
T51
L2
L4
T31
98.1
VR154
Frequency(MHz)
Adjustment Method
(Switch Position)
DC V Meter(1) : 6V
Center Meter : 0
mV Meter(1) : Maximum
mV Meter(1) : Maximum
mV Meter(1) : Maximum
(STEREO MODE)
mV Meter(1) : Separation 5dB
(STEREO MODE)
KEH-1950/X1M/ES
FM SSG
No.
TUN Volt 1
IF
2
ANT Coil 3
RF Coil
4
IFT
5
ARC
6
Frequency(MHz)
•••••
98.1
98.1
98.1
98.1
M
M
M
M
98.1 S
Displayed
Level(dBf)
•••••
60—100
5
5
5
40
108.0
98.1
98.1
98.1
98.1
Adjustment
Point
L5
T51
L2
L4
T31
98.1
VR154
Frequency(MHz)
Adjustment Method
(Switch Position)
DC V Meter(1) : 6V
Center Meter : 0
mV Meter(1) : Maximum
mV Meter(1) : Maximum
mV Meter(1) : Maximum
(STEREO MODE)
mV Meter(1) : Separation 5dB
(STEREO MODE)
31
KEH-1900,1950
7. GENERAL INFORMATION
7.1 DISASSEMBLY
Cassette Mechanism Assy
- Remove the Case(not shown)
1. Remove the three screws.
2. Remove the Case.
- Remove the Cassette Mechanism Assy
(not shown)
1. Remove the four screws.
2.Disconnect the connector, and then remove the
Cassette Mechanism Assy.
- Remove the Panel Unit(Fig.1)
Disengage the stopper at two locations
indicated by arrow.
Remove the Panel Unit.
Fig.1
Panel Unit
- Remove the Tuner Amp Unit(Fig.2)
Remove the two screws.
Remove the three screws.
Remove the screw.
Unbend the tabs at four locations indicated
by arrow until straight.
Remove the Tuner Amp Unit.
Tuner Amp Unit
32
Fig.2
KEH-1900,1950
7.2 PARTS
7.2.1 IC
SN761029DL
TONEout-L
FRNTout-L
REARout-L
VREFin
AGND
DGND
Ct
Fader
FADERin-L
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
NC
Bass
BASS-C2-L
Isolator
BASS-R-L
Volume, Treble
Loudness
BASS-C1-L
Gain
Adjust
TREB-L
3 Line Serial Bus
VRin-L
Zero-cross
Detector
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
LOUD-L
A
8
ZCin-L
Power
Supply
7
SWout-L
Gain
Adjust
6
AGND
A
5
IN4(-)-L
Power
Supply
4
IN4(+)-L
Fader
3
IN3-L
Bass
2
IN2-L
Volume,
Loudness Treble
1
IN1-L
Isolator
AVcc
VCC
IN1-R
IN2-R
IN3-R
IN4(+)-R
IN4(-)-R
AGND
SWout-R
ZCin-R
LOUD-R
VRin-R
TREB-R
BASS-C1-R
BASS-R-R
BASS-C2-R
NC
TONEout-R
FADERin-R
FRNTout-R
REARout-R
DVcc
DATA
CLK
STB
33
KEH-1900,1950
- Pin Functions (PE5107A)
Pin No.
Pin Name
1
mcmute
2
tapld
3
EO
4
VDD1
5
GND
6
VCOIN
7
CE
8
VDD2
9
LCK
10
LDT
11
LDI
12
FMSD
13
AMIF
14
SL
15
st
16
sk
17
DK
18
swvdd
19
NC
20
VST
21
VCK
22
VDT
23
NC
24
XO
25
XI
26
GND
27–30
NC
31
TEST
32
dsens
33,34
GND
35–38
NC
39
mute
40
DMINH
41,42
NC
43
SYSPW
44–48
NC
49
MS
50
MECPW
51
AM
52
LOCL
53
LOCH
54
FM
55
seek
56
NC
57
LW
58
GND
59
DM3
60
DM2
61
DM1
62
DM0
63
nor/REV
64
GND
34
I/O
I
I
O
Format
C
I
I
I/O
O
I
I
I
I
I
C
C
O
C
O
O
O
C
C
C
O
I
I
I
O
O
C
C
O
C
O
O
O
O
O
O
C
C
C
C
C
C
O
C
I
I
I
Function and Operation
Cassette mechanism mute input
Tape loading input
Error output
Power supply
GND
AM/FM VCO input
ACC power sense input
Power supply
Serial clock input and output for LCD driver
Data output for LCD driver
Key/LCD driver data input
FM SD input
AM IF signal input
Signal level input
FM stereo input
Not used
Not used
Grille power supply control output
Not used
Strobe pulse output for electronic volume
Clock output for electronic volume
Data output for electronic volume
Not used
Crystal oscillator connection pin
Crystal oscillator connection pin
GND
Not used
Test program mode input
Grille detach sense input
GND
Not used
System mute output
Mechanism mute cancel output
Not used
System power supply control output
Not used
Not used
Cassette mechanism power output
AM power control output
LOC “L“ output
LOC “H” output
FM power control output
Seek output
Not used
LW output
GND
Not used
Not used
Model,function input
Model,function input
Tape running input
GND
KEH-1900,1950
*PE5107A
33
51
52
32
IC's marked by* are MOS type.
Be careful in handling them because they are very
liable to be damaged by electrostatic induction.
Format
C
64
Meaning
C MOS
20
1
19
- Pin Functions(PDC045A)
Pin No.
1–4
5–8
9–12
13
14
15
16
17
18
19
20
21
22,23
24
25–28
29–42
43–48
Pin Name
NC
KS4-1
KD4-1
SI
SO
SCK
REMIN
RES
TEST
OSC-IN
OSC-OUT
GND
VDD2,1
VDD
COM1-4
SEG1-14
NC
I/O
O
I
I
O
I/O
I
I
I
I
O
O
O
Function and Operation
Not used
Key strobe output
Key data input
Display data input
Key data output
Clock input terminal for serial data input and output
Remote control reception
Reset input
Test input
System clock input
System clock output
GND
LCD power supply
Power supply
LCD common signal
LCD segment signal
Not used
13
24
*PDC045A
36
1
48
12
37
25
35
KEH-1900,1950
7.2.2 DISPLAY
36
COMMON
SEGMENT
- CAW1568
Red
Yellow
To terminal always supplied with power
regardless of ignition switch position.
Perform these connections
when using a different amp
(sold separately).
With a 2 speaker system,
connect to the 2 speakers
in the front or the rear.
Black (ground)
To electric terminal controlled by ignition
switch (12 V DC) ON/OFF.
To vehicle (metal) body.
Antenna jack
Rear output
This Product
Fuse
Rear
Rear
Front
Left speaker
≠
≠
+
+
≠
+
+
Violet/black
Violet
Gray/black
Gray
Rear
Rear
Front
Right speaker
System remote
control
≠
Green/black
Green
White/black
White
Blue/white
≠
+
≠
+
To system control terminal
of the power amp or Auto-antenna
relay control terminal.
(Max. 300 mA 12 V DC.)
Connecting cords with
RCA pin plugs
(sold separately)
Power amp
(sold separately)
KEH-1900,1950
8. OPERATIONS AND SPECIFICATIONS
- KEH-1900/X1M/UC
37
38
LOCAL button
Buttons 1–6
Detach button
22/33 buttons
EJECT button
BSM button
CLOCK
button
Cassette door
SHIFT/LOUD
button
2/3 buttons
TUNER button
BAND button
3. Turn the Tuner OFF.
2. Raise or lower the volume.
• You cannot switch to the Tuner when a tape is loaded.
• You cannot switch to the Cassette Player when a tape is not loaded.
• When this product’s blue/white lead is connected to the car’s Auto-antenna relay control terminal,
the car’s Auto-antenna extends when this product ’s power is switched ON. To retract the antenna,
switch the power OFF.
Note:
1. Press the TUNER button to switch the Tuner ON/OFF.
• Loading a cassette in this product.
Note:
The following explains the initial operations required before you can listen to music.
To Listen to Music
Basic Operation
8.1 OPERATIONS
+/– buttons
Head Unit
Key Finder
KEH-1900,1950
- KEH-1900/X1M/UC
Preset Number Indicator
2 seconds or more
Broadcast station preset memory
• Up to 18 FM stations (6 in FI (FM1), FII (FM2) and FIII
(FM3)) and 6 AM stations can be stored in memory.
Note:
2 seconds or less
Preset station recall
• You can memorize broadcast stations in buttons
1 through 6 for easy, one-touch station recall.
Preset Tuning
Band Indicator
FI (FM1) = FII (FM2) = FIII (FM3)
= A (AM)
Frequency Indicator
Band
• You can select the tuning method by pressing the 2 and 3 buttons at the
same time.
• When the Seek Tuning is selected, “SEEK” lights in the display.
• When the Manual Tuning is selected, “SEEK” goes out from the display.
• Stereo indicator “” lights when a stereo station is selected.
Note:
• Press 2 or 3 to select a station.
Manual and Seek Tuning
Basic Operation of Tuner
Basic Operation
The power of this product turns OFF
when you eject a tape with the EJECT
button.
When you listen to the Tuner before a
tape is set to this product, the source
switches to the radio.
Eject
You can listen to a tape if it is set to this
product even when listening to the Tuner.
Cassette Loading Slot
Tape Play Indicator
• To change the
direction, press the
1 and ¡
buttons at the same
time.
Direction Change
• To release Fast Forward/Rewind, lightly press the 1 or ¡ button located on the
opposite side of the one you pressed to Fast Forward or Rewind.
Note:
• To select Rewind, press the button for the opposite direction as the
tape play indicator.
• To select Fast Forward, press the button for the same direction as
the tape play indicator.
Fast Forward/Rewind
Basic Operation of Cassette Player
KEH-1900,1950
39
KEH-1900,1950
8.2 SPECIFICATIONS
- KEH-1900/X1M/UC
Specifications
General
FM tuner
Power source .......... 14.4 V DC (10.8 – 15.1 V allowable)
Grounding system ........................................ Negative type
Max. current consumption ........................................ 8.5 A
Dimensions
(DIN) (chassis) ...... 178 (W) × 50 (H) × 150 (D) mm
[7 (W) × 2 (H) × 5-7/8 (D) in]
(nose) ............ 188 (W) × 58 (H) × 20 (D) mm
[7-3/8 (W) × 2-1/4 (H) × 3/4 (D) in]
(D) (chassis) ...... 178 (W) × 50 (H) × 155 (D) mm
[7 (W) × 2 (H) × 6-1/8 (D) in]
(nose) ............ 170 (W) × 48 (H) × 15 (D) mm
[6-3/4 (W) × 1-7/8 (H) × 5/8 (D) in]
Weight ........................................................ 1.2 kg (2.6 lbs)
Frequency range .................................... 87.9 – 107.9 MHz
Usable sensitivity .................................................... 11 dBf
(1.0 µV/75 Ω, mono, S/N: 30 dB)
50 dB quieting sensitivity ........................................ 16 dBf
(1.7 µV/75 Ω, mono)
Signal-to-noise ratio ...................... 70 dB (IHF-A network)
Distortion .......................... 0.3% (at 65 dBf, 1 kHz, stereo)
Frequency response ...................... 30 – 15,000 Hz (±3 dB)
Stereo separation .......................... 40 dB (at 65 dBf, 1 kHz)
Selectivity .................................................... 70 dB (2ACA)
Three-signal intermodulation
(desired signal level) ........................................ 50 dBf
(two undesired signal level: 100 dBf)
Amplifier
AM tuner
Continuous power output is 17 W per channel min. into 4
ohms, both channels driven 50 to 15,000 Hz with no more
than 5% THD.
Maximum power output ...................................... 40 W × 4
Load impedance .......................... 4 Ω (4 – 8 Ω allowable)
Preout maximum output level/
output impedance .................................... 2.2 V/1 kΩ
Tone controls
(Bass) .............................................. ±12 dB (100 Hz)
(Treble) ............................................ ±12 dB (10 kHz)
Loudness contour ..........+10 dB (100 Hz), +7 dB (10 kHz)
(volume: –30 dB)
Frequency range ...................................... 530 – 1,710 kHz
Usable sensitivity .............................. 18 µV (S/N: 20 dB)
Selectivity ................................................ 50 dB (±10 kHz)
Cassette player
Tape ........................ Compact cassette tape (C-30 – C-90)
Tape speed ...... 4.76 cm/sec.(+0.14 cm/sec.,-0.05 cm/sec.)
Fast forward/rewinding time ...... Approx. 90 sec. for C-60
Wow & flutter .......................................... 0.13% (WRMS)
Frequency response ...................... 40 – 14,000 Hz (±3 dB)
Stereo separation ...................................................... 45 dB
Signal-to-noise ratio...................... 52 dB (IHF-A network)
Note:
• Specifications and the design are subject to
possible modification without notice due to
improvements.
40
KEH-1900,1950
- KEH-1950/X1M/ES
Specifications
General
FM tuner
Power source .......... 14.4 V DC (10.8 – 15.1 V allowable)
Grounding system ........................................ Negative type
Max. current consumption ........................................ 8.5 A
Dimensions
(DIN) (chassis) ...... 178 (W) × 50 (H) × 150 (D) mm
(nose) ............ 188 (W) × 58 (H) × 20 (D) mm
(D) (chassis) ...... 178 (W) × 50 (H) × 155 (D) mm
(nose) ............ 170 (W) × 48 (H) × 15 (D) mm
Weight ...................................................................... 1.2 kg
Frequency range ...................................... 87.5 – 108 MHz
Usable sensitivity .................................................... 11 dBf
(1.0 µV/75 Ω, mono, S/N: 30 dB)
50 dB quieting sensitivity ........................................ 16 dBf
(1.7 µV/75 Ω, mono)
Signal-to-noise ratio ...................... 70 dB (IEC-A network)
Distortion .......................... 0.3% (at 65 dBf, 1 kHz, stereo)
Frequency response ...................... 30 – 15,000 Hz (±3 dB)
Stereo separation .......................... 40 dB (at 65 dBf, 1 kHz)
Amplifier
AM tuner
Continuous power output is 17 W per channel min. into 4
ohms, both channels driven 50 to 15,000 Hz with no more
than 5% THD.
Maximum power output ...................................... 40 W × 4
Load impedance .......................... 4 Ω (4 – 8 Ω allowable)
Preout maximum output
level/output impedance .......................... 2.2 V /1 kΩ
Tone controls
(Bass) ...................................... +8 – –16 dB (100 Hz)
(Treble) ............................................ ±12 dB (10 kHz)
Loudness contour ..........+10 dB (100 Hz), +7 dB (10 kHz)
(volume: –30 dB)
Frequency range ........................ 531 – 1,602 kHz (9 kHz)
530 – 1,640 kHz (10 kHz)
Usable sensitivity .............................. 18 µV (S/N: 20 dB)
Selectivity .................................................. 50 dB (±9 kHz)
50 dB (±10 kHz)
Cassette player
Tape ........................ Compact cassette tape (C-30 – C-90)
Tape speed ...... 4.76 cm/sec.(+0.14 cm/sec.,-0.05 cm/sec.)
Fast forward/rewinding time ...... Approx. 90 sec. for C-60
Wow & flutter .......................................... 0.13% (WRMS)
Frequency response ...................... 40 – 14,000 Hz (±3 dB)
Stereo separation ...................................................... 45 dB
Signal-to-noise ratio .................... 52 dB (IEC-A network)
Note:
• Specifications and the design are subject to
possible modification without notice due to
improvements.
41
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