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Specifications ...........................................................................  1

1. GENERAL

Location and Function of Controls .................................... 2

2. DISASSEMBLY

2-1. Cabinet (Rear) ............................................................. 3
2-2. Cabinet (Front) ........................................................... 3
2-3. Main Board, Chassis ................................................... 4

3. DIAL POINTER INSTALLATION

........................... 5

4. ELECTRICAL ADJUSTMENTS

............................. 6

5. DIAGRAMS

5-1. Printed Wiring Boards ................................................ 7
5-2. Schematic Diagram ..................................................... 9

6. EXPLODED VIEWS

................................................... 11

7. ELECTRICAL PARTS LIST

................................... 13

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270°C during

repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or

unsoldering.

Notes on chip component replacement

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

TABLE OF CONTENTS

SECTION 1

GENERAL

Earphone jack (

@

)

DC IN 4.5V

LOCATION AND FUNCTION OF CONTROLS

Содержание ICF-403S

Страница 1: ...Ver 1 0 1999 08 MICROFILM ICF 403S SERVICE MANUAL FM MW SW 3 BAND RADIO SPECIFICATIONS AEP Model E Model Australian Model Saudi Arabia model AEP Australian model ...

Страница 2: ...ible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C during repairing Do not touch the soldering iron on the same conductor of the circuit board within 3 times Be careful not to apply force on the conductor when soldering or unsoldering Notes on chip component replacement Never reuse a disconnected chip component Notice that the minus side of a tantalum capacitor ma...

Страница 3: ...2 CABINET FRONT r The equipment can be removed using the following procedure Cabinet Front Cabinet Rear Set Main board Chassis 1 Screw P 2 6x8 Cabinet front Black Brown Chassis Main board 2 Remove solder 3 Black Brown 1 Screws BTP 3x12 4 Screw P 2 6x8 3 Lug 3 Cabinet rear Cabinet front 2 Claws 1 Screws BTP 3x12 ...

Страница 4: ... 4 2 3 MAIN BOARD CHASSIS 2 Claws 4 Knob tune 3 1 Screw P 2 6x8 Chassis Main board ...

Страница 5: ...requency coverage and tracking adjustments should be finally done by the trimmer capacitors Saudi Arabia model AM IF ADJUSTMENT Adjust for a maximum reading on level meter T1 455kHz MW FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter L5 520kHz CT4 1 650kHz MW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L1 620kHz CT1 1 400kHz SW FREQUENCY COVERAGE ADJUST...

Страница 6: ... A B C D D3 TUNE S2 TONE HIGH LOW RV1 POWER VOL R3 C30 C23 R6 C22 C28 C25 R13 C18 R9 R2 C6 C5 C2 C1 C3 C9 C11 C27 C42 C13 C15 C31 C24 R1 R5 R10 R11 DC IN 4 5V MAIN BOARD ANT1 FM SW TELESCOPIC ANTENNA DRY BATTERY SIZE AA IEC DESIGNATION R6 3PCS 4 5V CT6 CT5 CV1 4 TUNING L6 L2 L5 1 2 4 5 6 3 S1 SW N MW N FM L3 L4 JW1 JW2 JW7 BPF1 1 5 10 15 16 20 26 30 IC1 JW5 JW4 JW8 JW3 JW6 JW15 JW14 C7 C8 CF3 C14 ...

Страница 7: ...wise specified internal component U B Line H adjustment for repair Power voltage is dc 4 5V and fed with regulated dc power supply from battery terminal J2 Voltages are dc with respect to ground under no signal detuned condi tions no mark FM MW SW Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal production tolerances Signal path F FM f MW h SW Abbre...

Страница 8: ...017 01 CABINET REAR BLACK 8 3 037 017 11 CABINET REAR WHITE AEP 9 3 037 034 01 SPRING HANDLE 10 3 037 019 01 LID BATTERY CASE BLACK 10 3 037 019 11 LID BATTERY CASE WHITE AEP 11 3 372 124 01 CUSHION BATTERY 12 3 040 489 01 SHEET SPEAKER ANT1 1 501 222 81 ANTENNA TELESCOPIC FM SW SP1 1 529 451 11 SPEAKER 7 7cm Ref No Part No Description Remark Ref No Part No Description Remark 6 2 CHASSIS SECTION 6...

Страница 9: ...11 FILM 390PF 5 100V C8 1 136 682 11 FILM 0 0039uF 5 100V C9 1 163 103 00 CERAMIC CHIP 27PF 5 50V C11 1 163 097 00 CERAMIC CHIP 15PF 5 50V C13 1 163 021 91 CERAMIC CHIP 0 01uF 10 50V C14 1 124 589 11 ELECT 47uF 20 16V C15 1 163 031 11 CERAMIC CHIP 0 01uF 50V C16 1 126 964 11 ELECT 10uF 20 50V C18 1 163 031 11 CERAMIC CHIP 0 01uF 50V C19 1 126 963 11 ELECT 4 7uF 20 50V C20 1 126 960 11 ELECT 1uF 20...

Страница 10: ...71 00 METAL CHIP 8 2K 5 1 10W R5 1 216 057 00 METAL CHIP 2 2K 5 1 10W R6 1 216 045 00 METAL CHIP 680 5 1 10W R9 1 216 065 91 RES CHIP 4 7K 5 1 10W R10 1 216 057 00 METAL CHIP 2 2K 5 1 10W R11 1 216 017 91 RES CHIP 47 5 1 10W R13 1 216 049 91 RES CHIP 1K 5 1 10W VARIABLE RESISTOR RV1 1 241 555 11 RES VAR CARBON 50K POWER VOL SWITCH S1 1 771 748 11 SWITCH SLIDE FM MW SW S2 1 552 370 00 SWITCH SLIDE ...

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