Aiwa FR-A251 Bedienungsanleitung

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

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.

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

TRANSISTOR ILLUSTRATION

A1267-A

SCHEMATIC DIAGRAM _1

MAIN C.B

WIRING-1

MAIN C.B

PVC1

LW ANT

WIRING - 2

MAIN C.B

ELECTRICAL ADJUSTMENT

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

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

Sensitivity (3% dist.) Less than 20 dB (88/98/108 MHz)

Distortion (at 60dB) Less than 2% (98MHz)

Intermediate frequency 10.7MHz

IC BLOCK DIAGRAM

IC,LM8560

IC,CXA1619S

MECHANICAL EXPLODED VIEW - 1/1

SPEC

LABEL

SPEAKER

SCREW

PVC

PLATE

SCREW

POWER

CORD

SCREW

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