Aiwa CR-AS24 User manual

SERVICE MANUAL
DATA
RADIO RECEIVER
CR-AS24
S/M Code No. 09-024-457-5R1
REVISION
YZ(S)
• This Service Manual is the “Revision Publishing” and replaces “Simple Manual”
of CR-AS24 <YZ(S)>, (S/M Code No. 09-023-457-5T1).

– 2 –
SPECIFICATIONS
Frequency range: FM: 87.5 - 108 MHz
AM: 530 - 1,605 kHz
Maximum output: 160 mW (EIAJ 4 Ω)
Power source: DC 3 V using two R6 (size AA) batteries
Speaker: Diameter 57 mm, 4 Ω
Maximum dimensions: 67.6 (W) x 114.7 (H) x 28.6 (D) mm (excluding projecting parts and controls)
Weight: Approx. 133 g (excluding batteries)
• Design and specifications are subject to change without notice.

! = ! SAFETY PARTS
C = Components marked
All components used on this model at the production line are shown in this service manual.
However, please note that not all components will be available as spare parts for after-sales service.
Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Components marked X and R are not designated as spare parts for after sales service, and will not be stocked at the spare parts centers.
UNIT-NAME ! C REF-NO PARTS-NO PARTS-NAME SUFFIX&MODEL
– 3 –
ELECTRICAL PARTS LIST
CR-AS24
YZBSC
MAIN O C 0001 87-012-188-080 CHIP C CAP 47PF 50V +/-10% (1 a
MAIN X C 0002 S8-056-250-500 CHIP CAP 25PF 50V +/-10% (160 a
MAIN O C 0003 87-012-188-080 CHIP C CAP 47PF 50V +/-10% (1 a
MAIN O C 0004 87-A10-801-080 C-CAP S CER 0.022UF 16V +/-10 a
MAIN O C 0005 87-A10-468-080 ELECT CAPACITOR 10UF 10V +/-2 a
MAIN O C 0006 87-012-167-080 C-CAP 5PF 50V +/-0.25P NPO 16 a
MAIN O C 0007 87-012-180-080 C-CAP 22P 50V +/-5% NPO 1608 a
MAIN O C 0008 87-012-182-080 CHIP CAP NPO 27PF 50V +/-5% ( a
MAIN O C 0009 87-012-168-080 CHIP C CAP 6PF 50V +/-0.25PF a
MAIN O C 0010 87-012-164-080 CHIP C.CAP 2PF 50V +/-0.25PF a
MAIN O C 0012 87-010-403-080 ELECT.CAPACITOR 3.3UF 50V +/- a
MAIN X C 0013 S8-036-103-500 CHIP C-CAP S 0.01UF 16V +/-10 a
MAIN O C 0014 87-A10-468-080 ELECT CAPACITOR 10UF 10V +/-2 a
MAIN O C 0015 87-010-404-080 ELECT CAPACITOR 4.7UF 50V +/- a
MAIN O C 0016 87-A10-468-080 ELECT CAPACITOR 10UF 10V +/-2 a
MAIN O C 0017 87-A10-801-080 C-CAP S CER 0.022UF 16V +/-10 a
MAIN O C 0018 87-010-400-080 ELECT.CAPACITOR 0.47UF 50V +/ a
MAIN O C 0019 87-A10-468-080 ELECT CAPACITOR 10UF 10V +/-2 a
MAIN X C 0020 S5-140-104-400 CERAMIC CAPACITOR 0.1UF 25V + a
MAIN O C 0021 87-010-221-080 ELECT CAP 470UF 10V +/-20% (6 a
CR-AS24
YZBSC
MAIN O C 0022 87-016-453-080 CHIP C-CAP 0.1UF 16V +80% -20 a
MAIN O C 0023 87-010-221-080 ELECT CAP 470UF 10V +/-20% (6 a
MAIN X C 0024 S8-036-103-500 CHIP C-CAP S 0.01UF 16V +/-10 a
MAIN O C 0025 87-A10-801-080 C-CAP S CER 0.022UF 16V +/-10 a
MAIN X C 0026 S8-036-103-500 CHIP C-CAP S 0.01UF 16V +/-10 a
MAIN O CF 0001 S1-910-010-300 CERAMIC FILTER 450KHZ SFU450B a
MAIN O CF 0002 S2-310-011-700 CERAMIC FILTER 10.7MHZ MA5-A a
MAIN O CF 0003 S2-310-010-100 DISCRMINATOR FILTER CDA10.7MH a
MAIN S D 0001 82-135-799-010 DIODE IN4148-US-T (TAPE TYPE a
MAIN S D 0002 82-135-799-010 DIODE IN4148-US-T (TAPE TYPE a
MAIN O HP 0001 S1-210-011-500 DIA3.5 STEREO JACK TC38-010 a
MAIN S IC 0001 S2-522-426-000 IC KA22426D a
MAIN O L 0001 8B-RT9-601-010 FM SPRING COIL DIA 3.5x4.5Tx0 a
MAIN O L 0002 S1-110-020-000 FM SPRING COIL DIA3.5x3.5Tx0. a
MAIN O L 0003 8B-RT9-601-010 FM SPRING COIL DIA 3.5x4.5Tx0 a
MAIN O L 0005 S1-110-013-200 AM OSC COIL 8441A 7ZO-93100 ( a
MAIN O L 0006 S1-110-100-121 AM BAR ANTENNA SET 10x50MM (A a
MAIN O L 0009 S2-810-010-600 AXIAL LEAD INDUCTOR 1.5uH 1/8 a
MAIN O LED0001 S5-570-100-100 DIA3.0MM LED LAMP (RED) 202HD a
MAIN X PVC0001 S2-010-015-500 PVC AM/FM FC-22125-4N000-0 a
CR-AS24
YZBSC
MAIN O R 0001 88-118-153-080 CHIP RESISTOR 15K OHM 1/10W + a
MAIN X R 0002 88-118-122-080 CHIP RESISTOR 1.2K OHM 1/10W a
MAIN O R 0003 88-118-331-080 CHIP RESISTOR 330 OHM 1/10W + a
MAIN O R 0004 88-118-102-080 CHIP RESISTOR 1K OHM 1/10W a
MAIN O R 0005 88-118-472-080 CHIP RESISTER 4.7K OHM 1/10W a
MAIN O R 0006 88-121-104-080 CARBON FILM RESISTOR 100K OHM a
MAIN X R 0007 88-118-220-080 CHIP RESISTOR 22 OHM 1/10W +/ a
MAIN X R 0008 88-118-152-080 CHIP RESISTOR 1.5K OHM 1/10W a
MAIN X R 0009 88-118-221-080 CHIP RESISTOR 220 OHM 1/10W + a
MAIN X R 0010 88-118-151-080 CHIP RESISTOR 150 OHM 1/10W + a
MAIN O R 0011 88-118-102-080 CHIP RESISTOR 1K OHM 1/10W a
MAIN O SW 0001 S3-112-005-000 SLIDE SWITCH SKA-12D01S-G4-NA a
MAIN O T 0001 S1-007-000-600 AM IFT 7.8X7.8X12.5MM (WHITE) a
MAIN O VR 0001 S1-050-311-200 ROTARY VOL R121S-10-1.5F-A50K a
MAIN X W 0001 S2-021-001-100 UL-1007 STRANDED AWG#30 100MM a
MAIN X W 0002 S2-040-901-100 UL-1007 STRANDED AWG#30 L=90M a
MAIN X W 0003 S2-010-501-100 UL-1007 STRANDED AWG#30 50MM a
MAIN X W 0004 S2-020-301-100 UL-1007 STRANDED AWG#30 30MM a
MAIN X W 0005 S2-001-101-100 UL-1007 STRANDED AWG#30 110MM a
MAIN X W 0006 S2-090-401-100 UL-1007 STRANDED AWG#30 40MM a

– 4 –
88
A
Resistor Code
Chip Resistor Part Coding
Figure
Value of resistor
Chip resistor
Wattage Type Tolerance
1/16W
1/10W
1/8W
1608
2125
3216
5%
5%
5%
CJ
CJ
CJ
Form
LW t
1.6 0.8 0.45
2 1.25 0.45
3.2 1.6
108
118
128
: A
: A
CHIP RESISTOR PART CODE
0.55
Resistor Code
Dimensions (mm)
Symbol
1/16W 1005 5% CJ
1.0 0.5 0.35 104
Lt
W

– 5 –
MAIN C.B (COMPONENT SIDE)
PVC1
SW1
HP1
L3
L10
B
D1 D2
L1
JP1
JP2
JP3
L2
ANT
L5
C12
CF3 R6 CF2
JP8
T1
JP7
CF1
JP4
JP5C23
SP+
C14
C15
C16
C18
C5
C20
C21
C19
L9
B-
B+ JP6
SP-
A
VC1C
VC10
VC1A
VC1B
TC3
TC4
TC1
TC2
PVC1
TUNE
123
54
1
2
3
1
2
3
5
4
VR1
1
2
3
VR1
VOL
SW1
FM
AM
HP1
NOTE :
JPX
RX
LX
DX
LXX
LXX
CXX
CXX +
CXX +
CFX
CFX
CFX
5
3
1
2
WIRING (MAIN) <1 / 2>
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U

– 6 –
MAIN C.B (CONDUCTOR SIDE)
W6
FM ROD ANT
R8
LED1
C10
R9
W1
IC1
1
5
1014
15
ANT
B
C1 R11
C7
C2
R1
C25
R5 C26
C3
R3
R2
C8
R10
C9
C6
C24
C4
C22
R7
R4
C13
B-
B+
A
SP-
C17
SP+
20 25 28
SPEAKER
4 ohms
SP+
SP-
<YEL>
<BRN>
W2
W3
+
W5
W4
BATTERY R6 X 2 (DC 3V)
L6
(AM BAR ANTENNA)
<WHT>
<BLK>
<GRN>
<RED>
RXX
CXX
LEDX
NOTE :
LED1
TUNING
INDICATOR
WIRING (MAIN) <2 / 2>
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U

– 7 –
SCHEMATIC DIAGRAM
FM ROD ANT
W6 C5
10/10
C4
0.022
C24
0.01
TP1
D1
1N4148
D2
1N4148
C1 47p C3 47p
C6
5p
TC4 VC10
L6
(AM BAR ANTENNA)
B
W
G
R
C7 22p TC1 VC1A
L3
FM SPRING COIL
L6, TC4
AM TRACKING
ADJUSTMENT
L3, TC1
FM TRACKING
ADJUSTMENT
VC1B
TC2
C8 27p
R8 1.5K
L2
FM SPRING
COIL
L2, TC2
FM FREQUENCY
RANGE ADJUSTMENT
C10
2p
C26
0.01
VC1C
L5 AM OSC COIL
TC3
C9
6p
L5, TC3
AM FREQUENCY
RANGE ADJUSTMENT
C12 3.3 / 50
PVC1
PVC AM/FM FC-22125-4N000-0
TC1 - 4
VC10, 1A, 1B, 1C
TUNE
()
R11 1K
C25
0.022
1
2
3
ROTARY VOL
R121S-10-1.5F-A50K
VR1
VOL
R1
15K
L1
FM SPRING COIL
C2
25p
TP2
R2 1.2K
R3 330
R6 100K
14
FM / AM
IF OUT
13
RF
GND
BAND
SELECT
15
12
FM
RF IN
11
NC
AM
IF IN
16
FM
IF IN
17
R9 220
NC
18
10
AM
RF IN
TUNING
METER
19
IF
GND
20
9
FM
RF
8
REG
OUT
7
FM
OSC
AFC
AGC
21
AFC
AGC
22
DET
OUT
23
6
AFC
5
AM
OSC
AF
IN
24
4
VOL
3
NF
2
FM
DISC
1
RIPPLE
FILTER VCC
26
OUT
27
GND
28
MUTE
25
IC1 KA22426D AM / FM TUNER SYSTEM & POWER AMP
R10
150
CF3 10.7MHZ
L9
1.5uH
SW2 NM
W1
W4
W5
BATTERY
R6 X 2
(DC 3V)
SPEAKER
4 ohms
SP-
SP+
W3
W2
SW1 SWITCH SKA-12D01S-G4-NA
AM
FM
2
3
1
1
2
3
4
5
AM IF ADJUSTMENT
T1
AM IFT
C13
0.01
CF1
450KHZ
CF2
10.7MHZ
R4
1K
C14
10 / 10
C15
4.7 / 50
C16
10 / 10
C17
0.022
TP3
C18
0.47 / 50
R5
4.7K
LED1 DIA3.0MM LED LAMP (RED)202HD
TUNING INDICATOR
C22
0.1
C20
0.1
C21
470 / 10
C19
10 / 10
TP4
C23
470 / 10
R7
22
HP1
1
2
3
4
5
IC1
KA22426D
VOLTAGE CHART
VCC = 3.0V
PIN
FM
AM
PIN
FM
AM
1
0
0
15
1.28
0
2
2.18
2.70
16
0
0
3
1.50
1.50
17
1.27
0
4
0.76
0.76
18
0
0
5
1.22
1.22
19
0
0
6
1.42
1.07
20
0
0
7
1.22
1.22
21
0.82
1.47
8
1.22
1.22
22
1.43
1.08
9
1.22
1.22
23
1.61
0.97
10
1.22
1.22
24
0
0
11
0
0
25
2.70
2.70
12
0.32
0
26
3.00
3.00
13
0
0
27
1.52
1.52
14
0.40
0.10
28
0
0
SIGNAL :
FM
AM
NOTE :
CXX
LXX
RXX
+
+
NM = NO MOUNT
1
2
3
5
MAIN C.B

– 8 –
IC BLOCK DIAGRAM

– 9 –
ADJUSTMENT
1. AM IF Adjustment
Settings : Test point IC1(KA22426D) pin 23
Adjustment Location : T1
T1 ............................................................... 450kHz
2. AM Frequency Range Adjustment
Settings : Test point IC1(KA22426D) pin 23
Adjustment Location : L5, TC3
L5 ............................................................... 515kHz ± 5kHz
TC3 ............................................................. 1635kHz ± 20kHz
3. AM Tracking Adjustment
Settings : Test point IC1(KA22426D) pin 23
Adjustment Location : L6, TC4
L6 ............................................................... 600kHz
TC4 ............................................................. 1400kHz
3
2
4
5
1
L6
TC3
L3
TC1
TC4 TC2
L2
L5 T1
4. FM Frequency Range Adjustment
Settings : Test point IC1(KA22426D) pin 23
Adjustment Location : L2, TC2
L2 ............................................................... 87.4MHz +0.1/-0.2MHz
TC2 ............................................................. 108.3MHz ± 0.2MHz
5. FM Tracking Adjustment
Settings : Test point IC1(KA22426D) pin 23
Adjustment Location : L3, TC1
L3 ............................................................... 88MHz
TC1 ............................................................. 108MHz
PVC1
MAIN C.B (COMPONENT SIDE)

– 10 –
MECHANICAL EXPLODED VIEW
C
A
D
D
B
1
3
4
5
7
10
8
12
9
14
15
11
2
17
6
15
13
16

! = ! SAFETY PARTS
C = Components marked
All components used on this model at the production line are shown in this service manual.
However, please note that not all components will be available as spare parts for after-sales service.
Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Components marked X and R are not designated as spare parts for after sales service, and will not be stocked at the spare parts centers.
UNIT-NAME ! C REF-NO PARTS-NO PARTS-NAME SUFFIX&MODEL
– 11 –
MECHANICAL PARTS LIST
CR-AS24
YZBSC
0 MC1001 8C-RCF-011-010 LENS,DIAL YZ PMMA, J-802S a
0 MC1002 8C-RCF-006-010 BAND SWITCH ABS, J-114Y a
0 MC1003 8C-RCF-001-010 FRONT CABI ABS, J-NL008,T-MS6 a
0 MC1004 8C-RCF-007-010 TUNE KNOB ABS, J-NL009 a
0 MC1005 8C-RCF-005-010 POINTER LDPE, J-191Y a
0 MC1006 8C-RCF-008-010 VOL. KNOB ABS, J-NL089 a
0 MC1007 8C-RCF-201-010 HLDR JOIN a
X MC1008 S3-015-010-100 CRC15 MAIN PCB 94HB-A T=1.2MM a
0 MC1009 8C-RCJ-016-010 STRAP,HAND GRAY 200MM a
0 MC1010 S1-009-011-000 BAR HOLDER-NYLON a
0 MC1011 S2-010-012-301 FM ROD ANT 5 SECTION a
0 MC1012 85-RT5-202-010 CONTACT TERMINAL 2.6 DIAx12-0 a
0 MC1013 8C-RCF-009-010 CABI REAR YZ/YL ABS,J-NL008, a
0 MC1014 8C-RCF-203-010 BATT, CONTACT(+) a
0 MC1015 8C-RCF-204-010 BATT,CONTACT(-) a
0 MC1016 8C-RCF-003-010 DOOR,BATT ABS, J-NL008,T-MS68 a
0 MC1017 S1-010-032-500 SLIM MYLAR SPEAKER DIA=57MM 0 a
0 MC1A 87-268-529-310 PAN (PHILIP). M-SCREW M1.7x4m a
0 MC1B 87-265-071-210 PAN (PHILIP) M-SCREW M2.6x4MM a
0 MC1C 87-251-070-410 PAN (PHILIP) M-SCREW M2.6x3MM a
CR-AS24
YZBSC
0 MC1D 87-841-034-410 PAN(PHILIP) S-SCREW(B) M2X5mm a

– 12 –
Basic color symbol Color Basic color symbol Color Basic color symbol Color
B Black C Cream D Orange
G Green H Gray L Blue
LT Transparent Blue N Gold P Pink
R Red S Silver ST Titan Silver
T Brown V Violet W White
WT Transparent White Y Yellow YT Transparent Yellow
LM Metallic Blue LL Light Blue GT Transparent Green
LD Dark Blue DT Transparent Orange GM Metallic Green
YM Metallic Yellow DM Metallic Orange PT Transparent Pink
LA Aqua Blue GL Light Green HT Transparent Gray
HM Metallic Gray NH Champagne Gold M Wood Pattern
COLOR NAME TABLE

! = ! SAFETY PARTS
C = Components marked
All components used on this model at the production line are shown in this service manual.
However, please note that not all components will be available as spare parts for after-sales service.
Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Components marked X and R are not designated as spare parts for after sales service, and will not be stocked at the spare parts centers.
UNIT-NAME ! C REF-NO PARTS-NO PARTS-NAME SUFFIX&MODEL
– 13 –
ACCESSORIES PARTS LIST
CR-AS24
YZBSC
0 001 S1-210-012-800 3.5mm MONO EARPHONE & PLUG W/ a
0 002 8C-RCF-905-010 IB YZ(EGFSID) GHC AS24 a
0 003 8C-RCF-906-010 IB YZ(POHNCZ) GHC AS24 a
0 004 8C-RCJ-016-010 STRAP,HAND GRAY 200MM a

! = ! SAFETY PARTS
C = Components marked
All components used on this model at the production line are shown in this service manual.
However, please note that not all components will be available as spare parts for after-sales service.
Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Components marked X and R are not designated as spare parts for after sales service, and will not be stocked at the spare parts centers.
UNIT-NAME ! C REF-NO PARTS-NO PARTS-NAME SUFFIX&MODEL
– 14 –
OTHER PARTS LIST
CR-AS24
YZBSC
X 8C-RCF-851-010 COVER TOP YZB a
X 8C-RCF-852-010 COVER BOT YZB a
X S0-201-480-000 SLOW DENSITY SPONGE 18x9x7 a
X S8-810-010-200 EYELET DIA1.5 X 4MM a
X S8-810-010-000 EYELET DIA2 X 4MM a
X S3-015-010-100 CRC15 MAIN PCB 94HB-A T=1.2MM a
X S2-080-901-100 UL-1007 STRANDED AWG#30 90MM a
X S4-002-000-500 SPONGE “W8 X L12MM” a
X S4-002-000-500 SPONGE “W8 X L12MM” a
X 87-B40-281-010 LBL,BAR-CODE A a
X 87-B50-078-010 LIST FACILITY(S)-0007 a
X S0-200-030-000 POLYBAG W76xL100xTHK0.03MM - a
X S0-201-040-000 POLY BAG L175 x W60 x 0.03mm a
X 8C-RCF-853-010 BD PRINTED YZBSC a
X 87-056-168-010 INF-WARR SHEET-PAPER(WHITE) a
X 8C-RCF-014-010 LBL SPEC YZ a

2-11, IKENOHATA 1-CHOME, TAITO-KU, TOKYO 110-8710, JAPAN TEL:[phone]
9301944 0251431