Aiwa FR-A255 Manuale utente

RADIO RECEIVER

FR-A255

S/M Code No. 09-992-324-2R1

SERVICE MANUAL

REVISION

This Service Manual is the “Revision Publishing” and replaces “Simple Manual”

FR-A255<UB>(S/M Code No.09-992-324-2T1)

DATA

MODEL CODE : 88RC6-0137(S)

SPECIFICATIONS

Power source AC 120 V, 60 Hz

Output 280 mW (EIAJ)

Power consumption 4 W

Speaker 57 mm, 8 ohms

Frequency range FM : 87.5 - 108 MHz

AM : 530 - 1,710 kHz

Antennas FM wire antenna

Ferrite bar antenna for AM

Dimensions (W x H x D) 124 x 126 x 160 mm

(5 x 5 x 63/8in.)

Weight Approx. 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

Resistor Code

Chip Resistor Part Coding

Figure

Value of resistor

Chip resistor

Wattage Type Tolerance

1/16W

1/10W

1/8W

1608

2125

3216

Form

LW t

1.6 0.8 0.45

2 1.25 0.45

3.2 1.6

108

118

128

: A

CHIP RESISTOR PART CODE

0.55

Resistor Code

Dimensions (mm)

Symbol

1/16W 1005 5% CJ

1.0 0.5 0.35 104

S2-516-191-000 IC,CXA1619AS(RF+1F+AUDIO)

S1-88A-008-A00 IC,LM8562

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

CF1 S3-33A-008-A00 AM C/FILTER SFU450B

CF2 S3-32A-012-A00 FM C/FILTER SFE10.7

L1 S2-10A-062-A00 AM ANT COIL 60-10 560UH

L4 S2-24A-032-A00 AM OSC COIL 7-7-2 A106

L5 S2-14A-034-A00 CHOKE COIL 47UH TYPE 4-6

L53 S2-15A-030-A00 LOADING COIL 4.5P

L54 S2-15A-030-A00 LOADING COIL 4.5P

LD51 S2-00A-008-A00 LED DISPLAY FTTL-655 SGAN-RG

PVC1 S2-61A-030-A00 PVC ST-505 60P/82P 20PX2

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)

SW52 S2-81A-057-A00 SLIDE SW 4C-3P(ALARM)

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

SW59 S6-42A-065-A00 TACT SW TS114-16

SW60 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 S4-10A-022-A00 POWER TRANSFORMER EI-35.120V

VR1 S2-56A-015-A00 VR,50K-B POINT CONTACT

SCHEMATIC DIAGRAM _1

MAIN C.B

WIRING-1

MAIN C.B

PVC1

AM ANT

(SW53:NOTUSE)

WIRING-2

MAIN C.B

TRANSISTOR ILLUSTRATION

B C E

A1267Y

ELECTRICAL ADJUSTMENT

1. AM 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. AM FREQ, RANGE Adjustment

Setting : • Test point : L1(IN), TP6, 7, 8, 9(OUT)

L4 . . . . . . . . . . . . . . . . . . . . . 515 kHz

TC4 . . . . . . . . . . . . . . . . . . . . 1750 kHz

4. AM Tracking Adjustment

Setting : • Test point : L1(IN), TP6, 7(OUT)

L1 . . . . . . . . . . . . . . . . . . . . . 600 kHz

TC1 . . . . . . . . . . . . . . . . . . . . 1500 kHz

5. FM FREQ, RANGE Adjustment

Setting : • Test point : TP4, 5(IN), TP6, 7, 8, 9(OUT)

L3 . . . . . . . . . . . . . . . . . . . . 87.0 MHz

TC3 . . . . . . . . . . . . . . . . . . . 109 MHz

6. FM Tracking Adjustment

Setting : • Test point : TP4, 5(IN), TP6, 7(OUT)

TC2 . . . . . . . . . . . . . . . . . . . 106 MHz

PRACTICAL SERVICE FIGURE

Sensitivity Less than 50 dB (600 kHz)

(S/N 10dB) Less than 46 dB (1000/1400 kHz)

S/N (Input 60dB) Less than 21 dB (600 kHz)

Less than 24 dB (1000/1400kHz)

Distortion Less than 3 % (1000 kHz)

Intermediate frequency 450kHz

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

S/N (at 60dB) Less than 45 dB (98 MHz)

Distortion (at 60dB) Less than 3% (98MHz)

Intermediate frequency 10.7MHz

IC BLOCK DIAGRAM

IC,LM8562

IC,CXA1619S

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