sony_icf-703l_sm 电路图 维修原理图.pdf

1 SERVICE MANUALAEP Model ICF-703/703L UK Model ICF-703L ICF-703/703L FM/AM RADIO ICF-703 FM/MW/LW 3 BAND RADIO ICF-703L (Photo: ICF-703L (BLACK) SPECIFICATIONS Frequency range: Italy BandICF-703ICF-703L FM87.5 - 108.0 MHz AM526.5 - 1606.5 kHz Other countries BandICF-703ICF-703L FM87.5 - 108.0 MHz87.5 - 108.0 MHz SW AM (MW)530 - 1605 kHz530 - 1605 kHz LW 153 - 255 kHz Speaker Approx. 10.2 cm (4 1/8 inches) dia. 8 ohms Power output 430 mW (at 10 % harmonic distortion) Output v jack ( 3.5 mm minijack) Power requirements With the supplied AC power cord: 220 - 230 V AC, 50 Hz With four R6 (size AA) batteries: 6V DC Dimensions Approx. 265 137 69 mm (w/h/d) (10 1/2 5 1/2 2 3/4 inches) incl. projecting parts and control with carrying handle pushed in. Mass Approx. 1019 g (2 lb 4 oz) incl. batteries Supplied accessory AC power cord (1) Design and specifications are subject to change without notice. Ver 1.0 2000. 03 RadioFans.CN 2 mark Center Frequency red10.70 MHz blue10.67 MHz orange10.73 MHz black10.64 MHz white10.76 MHz white/white10.75 MHz yellow10.79 MHz HOW TO CHANGE THE CERAMIC FILTERS This model is used two ceramic filters of CF2, CF3 and CF4. You must use same type of color marked ceramic filters in order to meet same specifications. Therefore, the ceramic filter must change two pieces together since its supply two pieces in one package as a spare parts. markmark white/white only CF2 CF3 CF4 markmark CF3 CF2 CF4 Notes on Chip Component Replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. RadioFans.CN 3 SECTION 1 GENERALThis section is extracted from instruction manual. A B C OPERATION ($ON/4STANDBY) Insert the # side of the battery first. Insrez le ct # de la pile en premier. Batterie mit der # Seite zuerst einlegen. Inserte en primer lugar el lado # de las pilas Inserire prima il lato # della pila. R6 (size AA) battery x 4 pile R6 (format AA) x 4 Mignonzelle (R6/AA) x 4 pila R6 (tomao AA) x 4 pila R6 (formato AA) x 4 ICF-703 ICF-703S ICF-703L Choosing Power Sources Batteries (See Fig. A) 1Open the lid of the battery case. Slide fully in the direction of the arrow (B) on the lid and lift it. Do not force to open it. Doing so may damage the unit. 2Insert four R6 (sizeAA) batteries (not supplied) with correct polarity. 3Close the lid. Battery life Using Sony LR6(size AA) alkaline batteries: Approx. 100 hours Using Sony R6 (size AA) batteries: Approx. 35 hours Replacing batteries When the sound becomes weak or distorted, replace all the batteries with new ones. Notes on batteries Insert the batteries with correct polarity. Do not charge the dry batteries. Do not use different types of batteries at the same time. When you replace the batteries, replace all with new ones. When the unit is not being used for a long period of time, remove the batteries to avoid damage from battery leakage and corrosion. If a battery leakage occurs, wipe the battery compartment with a soft cloth before inserting new ones. House Current (See Fig. B) 1Connect the AC power cord supplied to the AC IN jack of the radio. 2Plug into a wall outlet. Operating the Radio 1Press OPERATION ($) to turn on the radio. 2Select a desired band, and tune in a station using TUNING. TUNE (tuning) indicator lights up when a station is tuned in. 3Adjust the volume using VOL. 4Adjust the tone to your preference using TONE. To obtain clear treble, turn to “HIGH”. To reinforce bass, set to “LOW”. To turn off the radio, press OPERATION (4). To listen with an earphone connect the earphone to the v (earphone) jack. The spearker is deactivated when an earphone is connected. To improve Receiving condition (See Fig. C) FM: Extend the telescopic antenna and adjust the length and angle for the best reception. SW: Extend the telescopic antenna vertically. AM(MW)/LW : Since the reception is affected by the direction of the radio, rotate the unit horizontally for optimum reception. Telescopic antenna Antenne tlescopique Teleskopantenne Antena telescpica Antenna telescopica TUNE indicator Indicateur TUNE TUNE-Anzeige Indicador de sintonia (TUNE) Indicatore TUNE AC power cord (supplied) Cordon dalimentation secteur Netzkabel (mitgeliefert) Cable de alimentacin de CA (suministrado) Cavo di alimentazione CA in dotazione Carrying handle Poign de transport Tragegriff Asa de transporte Maniglia di trasporto v jack Prise v v-Buchse Toma v Presa v AM (MW)/LW AM (PO)/GO FM UKW SW OC KW AC IN 1 2 3 4 RadioFans.CN 4 Note : Follow the disassembly procedure in the numerical order given. 2-1. CABINET (REAR) 2-2. POWER BOARD SECTION 2 DISASSEMBLY 1 lid, battery case 2 BTP 3x16 3 BTP 3x16 4 BTP 3x16 5 cabinet (rear) 1 BTP 3x10 5 button (power) 4 Removal the solders. CN401 BLU BLK PNK 6 POWER board 3 CN401 2 RadioFans.CN 5 2-3. MAIN BOARD, LED BOARD 2-4. SETTING THE POINTER 1 knob (control) 8 BTP 3x10 9 BTP 3x10 7 claws qa MAIN board 5 BTP 2.6x5 6 LED board 2 knob (band) 3 chassis 0 4 Removal the solder. 1 rack (pointer) rack (pointer) 2 pointer Setting the Pointer A 1. Turn the Knob (Tuning) in the direction of A until it is stopped. 2.Place the rack as shown in the figure. 3.Mount the pointer. RadioFans.CN 6 Put the lead-wire antenna close to the set. AM RF signal generator 400Hz, 30% AM modulation Output level: as low as possible Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. ICF-703: FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter L486.5 (87.35) MHz CT1-3109.5 (108.25) MHz FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L6, L786.5 (87.35) MHz CT1-4109.5 (108.25) MHz NOTE : ( ) : Italian model ICF-703L: FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter L486.5 MHz CT1-3109.5 MHz FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L6, L786.5 MHz CT1-4109.5 MHz SECTION 3 ELECTRICAL ADJUSTMENTS FM SECTION BAND switch : FM telescopic antenna terminal 0.01F FM RF signal generator 400Hz, 30% FM modulation frequency deviation 22.5kHz Output level: as low as possible set 16 set earphone jack (EPJ1) level meter Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. AM/MW FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter L5520 (516.5) kHz CT1-21,650 (1,631.5) kHz AM/MW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L1-1600 (620) kHz CT1-11,400 kHz NOTE : ( ) : Italian model AM/MW IF ADJUSTMENT Adjust for a maximum reading on level meter T1 455 kHz AM (703)/MW (703L) SECTION BAND switch : AM 16 set earphone jack (EPJ1) level meter RadioFans.CN Put the lead-wire antenna close to the set. AM RF signal generator 400Hz, 30% AM modulation Output level: as low as possible 16 set earphone jack (EPJ1) level meter 7 8 Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. LW FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter CT6145 kHz 265 kHz LW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L1-2160 kHz CT5240 kHz Adjustment Location: MAIN BOARD ICF-703L: LW SECTION BAND switch : LW CT5 LW TRACKING(703L) ADJUSTMENT CT1-2 AM(703)/MW(703L) FREQUENCY COVERAGE ADJUSTMENT L4 FM FREQUENCY COVERAGE ADJUSTMENT CT1-1 AM(703)/MW(703L) TRACKING ADJUSTMENT L6,7 FM TRACKING ADJUSTMENT T1 AM(703)/MW(703L) IF ADJUSTMENT CT1-4 FM TRACKING ADJUSTMENT CT1-3 FM FREQUENCY COVERAGE ADJUSTMENT L5 AM(703)/MW(703L) FREQUENCY COVERAGE ADJUSTMENT MAIN BOARD (COMPONENT SIDE) CT6 LW FREQUENCY COVERAGE (703L) ADJUSTMENT L1-1 AM(703)/MW(703L) TRACKING ADJUSTMENT L1-2 LW (703L) TRACKING ADJUSTMENT RadioFans.CN 1 A B C D E F G H I J 23456789101112131415 IC1 D401 D402 R14 Q5 C403 C404 C401 R401 R402 R302 D301 R301 C19 C18 JC3 C12 C20 C9 C3 C4 R12 C16 C17 C25C24 R13 C23 C8 R10 C6 C1 C2 R1 R7R3 C37 L8 JC4 JC8 JC402 JC7 JC1 JC2 JC12JC11 JC6 JC10 JC9 JC5 B CE Q4 B C E Q1 B C E Q3 B C E Q2 B C E D1 TP10 TP9 TP9 TP3 CF3 CF2 TP1 BPF1 CF4 C10 TP2 C7 TP11 TP8 TP7 TP6 TP12 C14C21 C22 C15 C13 CF1 TP404 TP406 TP405 TP402 TP403 CN301 TP311 TP310 04 MAIN BOARDPOWER BOARD KEY BOARD CN1 L5 MW OSC L1 L4 L6 FM RF T1 RV2 TONE RV1 VOL S2 (BAND) AM/M FM/U S1 (BAND) LW/K MW/M FM/U T401 POWER TRANSFOMER C406 TP401 L401 JW401 S401 CN401 1-677-379- 1-677-381- 11 1-677-380- 11 11 1 5 1 3 CT5 CT6 CV1 TUNING ANT1 FM TELESCOPIC ANTENNA C31 115 13 16 30 PNK BLU L7 CT1-4CT1-3 CT1-2CT1-1 -3-4 -1-2 ACJ1 AC IN EPJ1 v S401 OPERATION ON STANDBY DRY BATTERY SIZE D (IEC DESIGNATION R20) 3PCS, 4.5V C402 SP1 SPEAKER BLU PNK D301 TUNE BLU PNK GRN CLEAR BLU BLK/RED RED GRN BLU BLK RED CLEAR BLU L1 FERRITE-ROD ANTENNA L1-2 LW(703L) (703L) L1-1 AM(703) MW(703L) BLU (703L) (703) (703L) (703L) (703) (703) -1-2 -4-3 (703) (703) (703) (703L) ICF-703/703L 9 10 4-1. PRINTED WIRING BOARDS Note: X : parts extracted from the component side. Y : parts extracted from the conductor side. f: internal component. b : Pattern from the side which enables seeing. SECTION 4 DIAGRAMS D1C-9 D401D-4 D402D-4 IC1C-11 Q1B-11 Q2B-10 Q3B-10 Q4B-10 Q5B-9 Semiconductor Location Ref. No.Location RadioFans.CN 4-2. SCHEMATIC DIAGRAMS 11 12 ICF-703/703L Note: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. f: internal component. C : panel designation. U : B+ Line. H : adjustment for repair. Total current is measured with power on. Power voltage is dc 4.5 V and fed with regulated dc power supply from battery terminal. Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM () : AM or LW Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal produc- tion tolerances. Signal path. F: FM Abbreviation IT: Italian model Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. RadioFans.CN SECTION 5 EXPLODED VIEW NOTE: The mechanical parts with no reference number in the exploded views are not supplied. Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. Color Indication of Appearance Parts Example : KNOB, BALANCE (WHITE) . (RED) Parts Color Cabinets Color Accessories and packing materials are given in the last of this parts list. Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark Abbreviation IT : Italian model 13 14 1X-3379-333-1CABINET (FRONT) SUB ASSY (BLACK) (703L) 1X-3379-335-1CABINET (FRONT) SUB ASSY (BLACK) (703) 1X-3379-336-1CABINET (FRONT) SUB ASSY (WHITE) (703L) 1X-3379-338-1CABINET (FRONT) SUB ASSY (WHITE) (703) 23-043-337-01KNOB (CONTROL) (BLACK) 23-043-337-11KNOB (CONTROL) (WHITE) (AEP) 33-043-343-01KNOB (BAND) (BLACK) 33-043-343-11KNOB (BAND) (WHITE) (AEP) 43-043-347-01POINTER 53-043-348-01RACK (POINTER) 63-043-330-01CHASSIS * 71-677-379-11LED BOARD * 81-677-381-11POWER BOARD 93-043-339-01BUTTON (POWER) (BLACK) 93-043-339-11BUTTON (POWER) (WHITE) (AEP) 103-043-344-11GEAR (BAND) (703) 103-043-344-21GEAR (BAND) (703L) 113-043-349-01GEAR (A), MIDWAY 123-043-721-01SPRING (BAND) 133-048-207-01RING (BAND) 143-043-350-01GEAR (B), MIDWAY 153-043-345-01SLIDER (BAND) (703L) 153-043-345-11SLIDER (BAND) (703) 167-685-532-14SCREW +BTP 2.6X5 TYPE2 N-S 177-685-547-19SCREW +BTP 3X10 TYPE2 N-S 187-685-550-14SCREW +BTP 3X16 TYPE2 N-S * 19A-3683-164-A MAIN PC BOARD ASSY (703L) * 19A-3683-177-A MAIN PC BOARD ASSY (703:AEP) * 19A-3683-196-A MAIN PC BOARD ASSY (703:IT) 203-043-346-01HOLDER, FERRITE-ROD ANTENNA 213-043-342-01DRUM (A), VC 223-364-941-11SCREW (+B) (2.6X5), NYLOK 233-043-338-01KNOB (TUNING) (BLACK) 233-043-338-11KNOB (TUNING) (WHITE) (AEP) 243-045-680-01SPRING (TUNING) 253-043-336-01SHAFT (TUNING) 267-671-112-11BALL, STEEL 277-685-534-14SCREW +BTP 2.6X8 TYPE2 N-S 283-049-870-01WOVEN (VOL), FABRIC NON SP11-529-676-11SPEAKER (10.2cm) 0T4011-435-513-11TRANSFORMER, POWER RR SP1 T401 2 1 3 4 5 6 7 8 17 17 17 18 18 10 9 11 12 13 14 15 16 19 28 20 27 21 22 23 24 25 26 5-1. CABINET (FRONT) SECTION 513-045-684-01CABINET (REAR) (BLACK) 513-045-684-11CABINET (REAR) (WHITE) (AEP) 523-049-207-01CUSHION (BATTERY) (B) 533-049-448-01CUSHION (BATTERY) (D) 543-043-717-01SPRING (HANDLE) 557-685-903-31SCREW +PTPWH 3X10 (TYPE2) 563-049-447-01CUSHION (BATTERY) (C) 573-043-335-01SHAFT (HANDLE) 587-685-903-21SCREW +PTPWH 3X8 (TYPE2) 593-049-592-01SPRING (HANDLE) (B) 607-685-534-14SCREW +BTP 2.6X8 TYPE2 N-S 617-623-508-01LUG, 3 623-043-334-01HANDLE (BLACK) 623-043-334-11HANDLE (WHITE) (AEP) 633-043-718-01TERMINAL (+.), BATTERY 643-049-208-01CUSHION (HANDLE) 653-043-331-01LID, BATTERY CASE (BLACK) 653-043-331-11LID, BATTERY CASE (WHITE) (AEP) 669-911-815-02CUSHION 673-043-719-01TERMINAL (+), BATTERY 683-043-720-01TERMINAL (), BATTERY ANT11-501-222-71ANTENNA, TELESCOPIC (FM) Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark 5-2. CABINET (REAR) SECTION ANT1 59 60 61 57 58 62 64 63 65 66 67 68 56 54 55 51 52 53 The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. RadioFans.CN 15 SECTION 6 ELECTRICAL PARTS LIST Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark *1-677-379-11LED BOARD * D3018-719-080-08LED SLP145B-51 (TUNE) R3011-216-057-00METAL CHIP2.2K5%1/10W R3021-216-061-00METAL CHIP3.3K5%1/10W * *A-3683-164-A MAIN BOARD, COMPLETE (703L) *A-3683-177-A MAIN BOARD, COMPLETE (703:AEP) *A-3683-196-A MAIN BOARD, COMPLETE (703:IT) * 3-043-346-01HOLDER, FERRITE-ROD ANTENNA 3-049-870-01WOVEN (VOL), FABRIC NON 7-685-534-14SCREW +BTP 2.6X8 TYPE2 N-S BPF11-236-022-11FILTER, BAND PASS C11-163-102-00CERAMIC CHIP24PF5.00%50V (703L) C21-163-141-00CERAMIC CHIP0.001uF5%50V (703L) C31-163-103-00CERAMIC CHIP27PF5%50V (EXCEPT 703:IT) C31-163-105-00CERAMIC CHIP33PF5%50V (703:IT) C41-163-103-00CERAMIC CHIP27PF5%50V (EXCEPT 703:IT) C41-163-105-00CERAMIC CHIP33PF5%50V (703:IT) C61-163-255-11CERAMIC CHIP150PF5.00%50V (703L) C71-124-261-00ELECT10uF20%50V C81-163-021-91CERAMIC CHIP0.01uF10.00% 50V C91-163-021-91CERAMIC CHIP0.01uF10.00% 50V C101-124-259-11ELECT4.7uF20.00% 16V C121-163-021-