ICF-703/703L SERVICE MANUAL FM/AM RADIO. AEP Model. UK Model ICF-703L ICF-703 FM/MW/LW 3 BAND RADIO ICF-703L. Ver

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IF-703/703L SERVIE MANUAL Ver 1.0 2000. 03 AEP Model IF-703/703L UK Model IF-703L (Photo: IF-703L (BLAK)) SPEIFIATIONS Frequency range: Italy Band IF-703 IF-703L FM 87.5-108.0 MHz AM 526.5-1606.

1 IF-703/703L SERVIE MANUAL Ver AEP Model IF-703/703L UK Model IF-703L (Photo: IF-703L (BLAK)) SPEIFIATIONS Frequency range: Italy Band IF-703 IF-703L FM MHz AM khz Other countries Band IF-703 IF-703L FM MHz MHz SW AM (MW) khz khz LW khz Speaker Approx cm (4 1/8 inches) dia. 8 ohms Power output 430 mw (at 10 % harmonic distortion) Output v jack (ø 3.5 mm minijack) Power requirements With the supplied A power cord: V A, 50 Hz With four R6 (size AA) batteries: 6V D Dimensions Approx 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 g (2 lb 4 oz) incl. batteries Supplied accessory A power cord (1) Design and specifications are subject to change without notice. FM/AM RADIO IF-703 FM/MW/LW 3 BAND RADIO IF-703L 1

2 HOW TO HANGE THE ERAMI FILTERS This model is used two ceramic filters of F2, F3 and F4. 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 it s supply two pieces in one package as a spare parts. mark mark F4 F2 F3 white/white only mark mark mark red blue orange black white white/white yellow enter Frequency MHz MHz MHz MHz MHz MHz MHz F4 F2 F3 Notes on hip omponent Replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. SAFETY-RELATED OMPONENT WARNING!! OMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SHEMATI DIAGRAMS AND IN THE PARTS LIST ARE RITIAL TO SAFE OPERATION. REPLAE THESE OMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. 2

3 SETION 1 GENERAL This section is extracted from instruction manual. OPERATION ($ON/4STANDBY) TUNE indicator Indicateur TUNE TUNE-Anzeige Indicador de sintonia (TUNE) Indicatore TUNE IF-703 IF-703S Telescopic antenna Antenne télescopique Teleskopantenne Antena telescópica Antenna telescopica hoosing Power Sources Batteries (See Fig. A) 1 Open 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. 2 Insert four R6 (sizeaa) batteries (not supplied) with correct polarity. 3 lose 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. A IF-703L 2 1 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. B R6 (size AA) battery x 4 pile R6 (format AA) x 4 Mignonzelle (R6/AA) x 4 pila R6 (tomaño AA) x 4 pila R6 (formato AA) x 4 arrying handle Poigné de transport Tragegriff Asa de transporte Maniglia di trasporto FM UKW Insert the # side of the battery first. Insérez le côté # 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. v jack Prise v v-buchse Toma v Presa v A IN A power cord (supplied) ordon d alimentation secteur Netzkabel (mitgeliefert) able de alimentación de A (suministrado) avo di alimentazione A in dotazione SW O KW 3 4 AM (MW)/LW AM (PO)/GO House urrent (See Fig. B) 1 onnect the A power cord supplied to the A IN jack of the radio. 2 Plug into a wall outlet. Operating the Radio 1 Press OPERATION ($) to turn on the radio. 2 Select a desired band, and tune in a station using TUNING. TUNE (tuning) indicator lights up when a station is tuned in. 3 Adjust the volume using VOL. 4 Adjust 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. ) 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. 3

4 Note : Follow the disassembly procedure in the numerical order given ABINET (REAR) SETION 2 DISASSEMBLY 4 BTP 3x16 1 lid, battery case 3 BTP 3x16 2 BTP 3x16 5 cabinet (rear) 2-2. POWER BOARD 1 BTP 3x10 6 POWER board 4 Removal the solders. N401 PNK BLK 2 5 button (power) 3 N401 4

5 2-3. MAIN BOARD, LED BOARD 9 BTP 3x10 4 Removal the solder. 8 BTP 3x10 qa MAIN board 3 chassis 0 7 claws 6 LED board 5 BTP 2.6x5 2 knob (band) 1 knob (control) 2-4. SETTING THE POINTER Setting the Pointer 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. rack (pointer) A 2 pointer 1 rack (pointer) 5

6 SETION 3 ELETRIAL S FM SETION BAND switch : FM AM (703)/MW SETION BAND switch : AM FM RF signal generator 0.01µF telescopic antenna terminal set AM RF signal generator Put the lead-wire antenna close to the set. 400Hz, 30% FM modulation frequency deviation ±22.5kHz Output level: as low as possible 400Hz, 30% AM modulation Output level: as low as possible level meter level meter 16Ω 16Ω set set earphone jack (EPJ1) earphone jack (EPJ1) Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. IF-703: FM FREQUENY OVERAGE L (87.35) MHz T (108.25) MHz FM TRAKING L6, L (87.35) MHz T (108.25) MHz NOTE : ( ) : Italian model IF-703L: FM FREQUENY OVERAGE L MHz T MHz AM/MW FREQUENY OVERAGE L5 520 (516.5) khz T1-2 1,650 (1,631.5) khz AM/MW TRAKING L (620) khz T1-1 1,400 khz NOTE : ( ) : Italian model AM/MW IF T1 455 khz FM TRAKING L6, L MHz T MHz 6

7 IF-703L: LW SETION BAND switch : LW AM RF signal generator Put the lead-wire antenna close to the set. Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. LW FREQUENY OVERAGE T6 145 khz <confirmation> 265 khz 400Hz, 30% AM modulation Output level: as low as possible set 16Ω level meter LW TRAKING L khz T5 240 khz Adjustment Location: MAIN BOARD earphone jack (EPJ1) MAIN BOARD (OMPONENT SIDE) L4 FM FREQUENY OVERAGE T1-4 FM TRAKING L6,7 FM TRAKING T1 AM(703)/MW IF T1-3 FM FREQUENY OVERAGE T1-1 AM(703)/MW TRAKING T1-2 AM(703)/MW FREQUENY OVERAGE L1-1 AM(703)/MW TRAKING L5 AM(703)/MW FREQUENY OVERAGE T6 LW FREQUENY OVERAGE T5 LW TRAKING L1-2 LW TRAKING 7 8

8 IF-703/703L SETION 4 DIAGRAMS 4-1. PRINTED WIRING BOARDS A POWER BOARD DRY BATTERY SIZE " D " (IE DESIGNATION R20) 3PS, 4.5V MAIN BOARD ANT1 FM TELESOPI ANTENNA B D T401 POWER TRANSFOMER N401 1 D401 D402 TP403 TP8 1 3 N1 TP7 TP6 D1 J8 J2 J1 (703) R14 (703) J7 TP11 TP12 Q5 TP10 B E TP9 E B B E E B Q4 TP1 Q3 Q2 T1 L L7 F3 F2 Q1 J3 E PNK B 13 TP9 F I TP TP2 BPF1 R10 T J10 J9 T1-3 J4 J5 22 F4 4 1 J6 10 R13 20 RV2 TONE RV1 VOL E AJ1 ~ A IN TP404 TP406 TP405 5 J402 TP402 PNK SP1 SPEAKER L6 FM RF L5 MW OS 6 T T L4 V1 TUNING R12 F G EPJ1 v R (703) 402 JW401 L401 R402 S401 TP401 S401 OPERATION ON STANDBY (703) S2 (BAND) AM/M FM/U 2 R7 BLK/RED T6 1 (703) S1 T5 (BAND) (703) LW/K MW/M FM/U -2 R3 GRN LEAR RED L R1 H D301 TUNE KEY BOARD N301 D301 R302 TP311 PNK J12 J I 04 R301 TP GRN L1 FERRITE-ROD ANTENNA BLK RED LEAR Semiconductor Location Ref. No. Location D1-9 D401 D-4 D402 D-4 J 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. L1-2 LW L1-1 AM(703) MW I1-11 Q1 B-11 Q2 B-10 Q3 B-10 Q4 B-10 Q5 B

9 IF-703/703L 4-2. SHEMATI DIAGRAMS Note: All capacitors are in µf unless otherwise noted. pf: µµf 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in Ω and 1 /4 W or less unless otherwise specified. f : internal component. : 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 MΩ). Voltage variations may be noted due to normal production 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

10 SETION 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. olor Indication of Appearance Parts Example : KNOB, BALANE (WHITE)... (RED) R R Parts olor abinet s olor Accessories and packing materials are given in the last of this parts list. Abbreviation IT : Italian model The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified ABINET (REAR) SETION 5-1. ABINET (FRONT) SETION ANT SP1 1 3 T Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1 X ABINET (FRONT) SUB ASSY (BLAK) 1 X ABINET (FRONT) SUB ASSY (BLAK) (703) 1 X ABINET (FRONT) SUB ASSY (WHITE) 1 X ABINET (FRONT) SUB ASSY (WHITE) (703) KNOB (ONTROL) (BLAK) KNOB (ONTROL) (WHITE) (AEP) KNOB (BAND) (BLAK) KNOB (BAND) (WHITE) (AEP) POINTER RAK (POINTER) HASSIS * LED BOARD * POWER BOARD BUTTON (POWER) (BLAK) BUTTON (POWER) (WHITE) (AEP) GEAR (B), MIDWAY SLIDER (BAND) SLIDER (BAND) (703) SREW +BTP 2.6X5 TYPE2 N-S SREW +BTP 3X10 TYPE2 N-S SREW +BTP 3X16 TYPE2 N-S * 19 A A MAIN P BOARD ASSY * 19 A A MAIN P BOARD ASSY (703:AEP) * 19 A A MAIN P BOARD ASSY (703:IT) HOLDER, FERRITE-ROD ANTENNA DRUM (A), V SREW (+B) (2.6X5), NYLOK KNOB (TUNING) (BLAK) KNOB (TUNING) (WHITE) (AEP) SPRING (TUNING) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark ABINET (REAR) (BLAK) ABINET (REAR) (WHITE) (AEP) USHION (BATTERY) (B) USHION (BATTERY) (D) SPRING (HANDLE) SREW +PTPWH 3X10 (TYPE2) USHION (BATTERY) () SHAFT (HANDLE) SREW +PTPWH 3X8 (TYPE2) SPRING (HANDLE) (B) SREW +BTP 2.6X8 TYPE2 N-S LUG, HANDLE (BLAK) HANDLE (WHITE) (AEP) TERMINAL (+. ), BATTERY USHION (HANDLE) LID, BATTERY ASE (BLAK) LID, BATTERY ASE (WHITE) (AEP) USHION TERMINAL (+), BATTERY TERMINAL ( ), BATTERY ANT ANTENNA, TELESOPI (FM) GEAR (BAND) (703) GEAR (BAND) GEAR (A), MIDWAY SPRING (BAND) RING (BAND) SHAFT (TUNING) BALL, STEEL SREW +BTP 2.6X8 TYPE2 N-S WOVEN (VOL), FABRI NON SP SPEAKER (10.2cm) 0 T TRANSFORMER, POWER 13 14

11 SETION 6 ELETRIAL PARTS LIST LED MAIN NOTE: Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. RESISTORS All resistors are in ohms. METAL:Metal-film resistor. METAL OXIDE: Metal oxide-film resistor. F:nonflammable Abbreviation IT : Italian model Items marked * are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. SEMIONDUTORS In each case, u : µ, for example: ua.. : µa.. upa.. : µpa.. upb.. : µpb.. up.. : µp.. upd.. : µpd.. APAITORS uf : µf OILS uh : µh The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. When indicating parts by reference number, please include the board. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * LED BOARD ********** < DIODE > D LED SLP145B-51 (TUNE) ERAMI HIP 0.047uF 10.00% 50V ERAMI HIP 0.47uF 25V ERAMI HIP 0.1uF 10% 25V ERAMI HIP 0.033uF 10% 25V ERAMI HIP 0.047uF 10.00% 50V < RESISTOR > R METAL HIP 2.2K 5% 1/10W R METAL HIP 3.3K 5% 1/10W ************************************************************* * A A MAIN BOARD, OMPLETE * A A MAIN BOARD, OMPLETE (703:AEP) * A A MAIN BOARD, OMPLETE (703:IT) ********************* HOLDER, FERRITE-ROD ANTENNA WOVEN (VOL), FABRI NON SREW +BTP 2.6X8 TYPE2 N-S < FILTER > BPF FILTER, BAND PASS < APAITOR > ERAMI HIP 24PF 5.00% 50V ERAMI HIP 0.001uF 5% 50V ERAMI HIP 27PF 5% 50V (EXEPT 703:IT) ERAMI HIP 33PF 5% 50V (703:IT) ERAMI HIP 27PF 5% 50V (EXEPT 703:IT) ERAMI HIP 33PF 5% 50V (703:IT) ERAMI HIP 150PF 5.00% 50V ELET 10uF 20% 50V ERAMI HIP 0.01uF 10.00% 50V ERAMI HIP 0.01uF 10.00% 50V ELET 4.7uF 20.00% 16V ERAMI HIP 0.01uF 10.00% 50V ELET 4.7uF 20.00% 16V ELET 4.7uF 20.00% 16V ELET 10uF 20% 50V ELET 22uF 20% 16V ELET 470uF 20.00% 10V ERAMI HIP 0.1uF 10% 25V ERAMI HIP 1uF 10.00% 10V ERAMI HIP 0.001uF 10% 50V ERAMI 5PF 0.50PF 50V (EXEPT 703 : IT) ERAMI HIP 5PF 0.50PF 50V (703 : IT) ERAMI HIP 5PF 50V < FILTER > F FILTER, RYSTAL F FILTER, ERAMI F FILTER, ERAMI F FILTER, ERAMI < TRIMMER > T AP, TRIMMER 30PF T AP, TRIMMER 45PF < VARIABLE APAITOR > V AP, VARIABLE (TUNING) < DIODE > D DIODE 1SS226 < I > I I XA1019S < JUMPER RESISTOR > J SHORT 0 J SHORT 0 (703) J SHORT 0 J SHORT 0 J SHORT 0 J SHORT 0 J SHORT 0 15

12 IF-703/703L MAIN POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark J SHORT 0 J SHORT 0 J SHORT 0 J SHORT 0 J SHORT 0 < OIL > < APAITOR > ERAMI HIP 0.1uF 10% 25V ELET 2200uF 20.00% 10V ERAMI HIP 0.01uF 10.00% 50V ERAMI HIP 0.01uF 10.00% 50V ELET 470uF 20.00% 10V L ANTENNA, FERRITE-ROD (703) L ANTENNA, FERRITE-ROD (LW.MW) L OIL (WITH ORE) (OS) L OIL, OS (MW) L OIL, AIR-ORE (EXEPT 703:IT) L OIL, AIR-ORE (703:IT) L OIL, AIR-ORE (EXEPT 703:IT) L OIL, AIR-ORE (703:IT) L INDUTOR 47uH < TRANSISTOR > Q TRANSISTOR DT144TKA-T146 Q TRANSISTOR DT144TKA-T146 Q TRANSISTOR DT144TKA-T146 Q TRANSISTOR DT144TKA-T146 (703) Q TRANSISTOR DT144TKA-T146 (703) < RESISTOR > R METAL HIP 10K 5% 1/10W R SHORT 0 (703) R SHORT 0 (703) R RES-HIP 1K 5% 1/10W R RES-HIP 1K 5% 1/10W R RES-HIP 1K 5% 1/10W R RES-HIP 100K 5% 1/10W (703) < VARIABLE RESISTOR > RV RES, VAR, ARBON 50K (VOL) RV RES, VAR, ARBON 10K (TONE) < SWITH > S SWITH, SLIDE (BAND) S SWITH, SLIDE (BAND) (703) < TRANSFORMER > T TRANSFORMER, IF ************************************************************* POWER BOARD ************* < ONNETOR > * N SOKET, ONNETOR 5P < DIODE > D DIODE 1N4002L D DIODE 1N4002L < JAK > EPJ JAK (v) < JUMPER RESISTOR > J SHORT 0 < OIL > L INDUTOR 38uH < RESISTOR > R RES-HIP 47 5% 1/10W R RES-HIP 1K 5% 1/10W < SWITH > S SWITH, PUSH (1 KEY) (OPERATION) ************************************************************* MISELLANEOUS *************** ANT ANTENNA, TELESOP I (FM) SP SPEAKER (10.2cm) 0 T TRANSFORMER, POWER ************************************************************* AESSORIES & PAKING MATERIALS ******************************** ORD, POWER (EXEPT UK) ORD, POWER (UK) MANUAL, INSTRUTION (ENGLISH, FRENH, GERMAN, SPANISH, ITALIAN, DUTH, SWEDISH, PORTUGUESE, FINNISH, DANISH) < INLET > 0AJ INLET, A 2P (- A IN) The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified Sony orporation Personal Audio Division ompany Printed in Japan Published by General Engineering Dept.

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