Aiwa FR-A251 Manuel utilisateur
RADIO RECEIVER
FR-A251
S/M Code No. 09-992-324-1R4
EZ(B,W)
SERVICE MANUAL
REVISION
This Service Manual is the “Revision Publishing” and replaces “Simple Manual”
FR-A251 EZ<B,W>(S/M Code No.09-992-324-1T4)
.
DATA
SPECIFICATIONS
Power source AC 230 V, 50 Hz
Output 280 mW (EIAJ)
Power consumption 4 W
Speaker 57 mm, 8 ohms
Frequency range FM : 87.5 - 108 MHz
LW : 150 - 285 kHz
Antennas FM wire antenna
Ferrite bar antenna for LW
Dimensions (W x H x D) 124 x 126 x 160 mm
(5 x 5 x 63/8in.)
Weight 708 g (1.56 lbs.)
• Design and specifications are subject to change without
notice
2
REF. NO PART NO. KANRI DESCRIPTION
NO.
REF. NO PART NO. KANRI DESCRIPTION
NO.
ELECTRICAL MAIN PARTS LIST
• Regarding connectors, They are not stocked as they are not the initial order items.
The connectors are available after they are supplied from connector manufacturers upon the order is received.
!
IC
S2-516-191-000 IC,CXA1619AS(RF+1F+AUDIO)
87-A21-201-010 IC,LM8560(CLOCK)
TRANSISTOR
S1-71H-003-E00 TR,A1267-Y
DIODE
82-135-799-080 DIODE,1N4148
S1-722-400-100 DIODE,1N4001
MAIN C.B
BA51 S6-45A-011-A00 BATT SNAP TERMI
C7 SE-C47-410-V05 CAP,E 0.47UF-10V
C8 S1-41T-101-0M0 CAP,E 1.0UF-10V
C9 87-015-968-040 CAP,E 4.7UF-10V
C12 87-010-264-010 CAP,E 100UF-10V
C13 87-010-236-080 CAP,E 1000.0UF-10V
C16 87-010-480-080 CAP,E 220UF-16V
C17 87-010-236-080 CAP,E 1000.0UF-10V
C19 87-010-264-010 CAP,E 100UF-10V
C53 87-010-480-080 CAP,E 220UF-16V
CF1 S3-33A-008-A00 AM C/FILTER SFU450B
CF2 S3-32A-012-A00 FM C/FILTER SFE10.7
L1 S2-10A-067-A00 AM ANT COIL
L4 S2-24A-038-A00 AM OSC COIL
L5 S2-14A-034-A00 CHOKE COIL 47UH TYPE 4-6
LD51 S2-00A-008-A00 LED DISPLAY FTTL-655 SGAN-RG
PVC1 S2-61A-031-A00 PVC(FRA250EZ)
SP1 S3-23A-025-A00 SPAEKER 57P/8 OM 0.5W FER/MAG
SW1 S2-81A-055-A00 SLIDE SW 2C-2P RG 4MM(BAND)
SW51 S2-81A-056-A00 SLIDE SW 2C-4P RG 4MM(POWER)
SW53 S6-42A-065-A00 TACT SW TS114-16
SW54 S6-42A-065-A00 TACT SW TS114-16
SW55 S6-42A-065-A00 TACT SW TS114-16
SW56 S6-42A-065-A00 TACT SW TS114-16
SW57 S6-42A-065-A00 TACT SW TS114-16
SW58 S6-42A-065-A00 TACT SW TS114-16
T1 S2-20A-025-A00 FM IFT 7-7-2 D30045
T2 S2-22A-028-A00 AM IFT 7-7-2 2B467
TF51 S4-01A-024-A00 POWER TRANS
VR1 S2-56A-015-A00 SEMI V R 50K-B POINT CONTACT
3
TRANSISTOR ILLUSTRATION
A1267-A
SCHEMATIC DIAGRAM _1
MAIN C.B
5
4
WIRING-1
MAIN C.B
PVC1
L1
LW ANT
6
WIRING - 2
7
MAIN C.B
ELECTRICAL ADJUSTMENT
8
MAIN C.B
ELECTRICAL ADJUSTMENT
1. LW IF Adjustment
Setting : • Test point : TP1, 2(IN), TP8, 9(OUT)
T2 . . . . . . . . . . . . . . . . . . . . . 450 kHz
2. FM IF Adjustment
Setting : • Test point : TP2, 3(IN), TP8, 9(OUT)
IT1 . . . . . . . . . . . . . . . . . . . . 10.7 MHz
3. LW FREQ, RANGE Adjustment
Setting : • Test point : L1(IN), TP6, 7, 8, 9(OUT)
L4 . . . . . . . . . . . . . . . . . . . . . 145 kHz
TC4 . . . . . . . . . . . . . . . . . . . . 295 kHz
4. LW Tracking Adjustment
Setting : • Test point : L1(IN), TP6, 7(OUT)
L1 . . . . . . . . . . . . . . . . . . . . . 150 kHz
TC1 . . . . . . . . . . . . . . . . . . . . 285 kHz
5. FM FREQ, RANGE Adjustment
Setting : • Test point : TP4, 5(IN), TP6, 7, 8, 9(OUT)
L3 . . . . . . . . . . . . . . . . . . . . 87.4 MHz
TC3 . . . . . . . . . . . . . . . . . . 108.3 MHz
6. FM Tracking Adjustment
Setting : • Test point : TP4, 5(IN), TP6, 7(OUT)
TC2 . . . . . . . . . . . . . . . . . . . 106 MHz
PRACTICAL SERVICE FIGURE
<LW SECTION>
Sensitivity Less than 60 dB (150 kHz)
(S/N 10dB) Less than 58 dB (200/285 kHz)
S/N (Input 70dB) Less than 15 dB (150/200/285 kHz)
Distortion Less than 3 % (1000 kHz)
Intermediate frequency 450kHz
<FM SECTION>
Sensitivity (3% dist.) Less than 20 dB (88/98/108 MHz)
Distortion (at 60dB) Less than 2% (98MHz)
Intermediate frequency 10.7MHz
9
IC BLOCK DIAGRAM
IC,LM8560
IC,CXA1619S
10
MECHANICAL EXPLODED VIEW - 1/1
SPEC
LABEL
SPEAKER
SCREW
PVC
PLATE
SCREW
POWER
CORD
SCREW
14
11
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