sony_icf-704s_service_manual 电路图 维修原理图.pdf

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1、1 Ver 1.0 2004. 04 Sony Corporation Personal Audio Company Published by Sony Engineering Corporation 9-877-784-01 2004D04-1 2004. 04 SERVICE MANUALAustralian Model ICF-704S FM/SW/MW 3 BAND RADIO SPECIFICATIONS Frequency range: BandICF-704S FM87.5 - 108.0 MHz SW5.95 - 18 MHz MW530 - 1605 kHz Speaker:

2、 Approx. 10.2 cm (4 1/8 inches) dia. 8 ohms Power output: 450 mW (at 10 % harmonic distortion) Output: v (earphone) ( 3.5 mm minijack) Power requirements: 230 V AC, 50 Hz 6V DC, four R6 (size AA) batteries Dimensions: Approx. 282.5 153.5 83.5 mm (w/h/d) (11 1/8 6 1/8 3 3/8 inches) incl. projecting p

3、arts and control with carrying handle pushed in. Mass: Approx. 1211 g (2 lb 10.7 oz) incl. batteries Supplied accessory: AC power cord (1) Design and specifications are subject to change without notice. RadioFans.CN 2 mark Center Frequency red10.70 MHz blue10.67 MHz orange10.73 MHz black10.64 MHz wh

4、ite10.76 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 s

5、ince 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 WA

6、RNING! 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. ICF-704S TABLE OF CONTENTS

7、 1. GENERAL. 3 2. DISASSEMBLY 2-1. Cabinet (Front) Assy . 5 2-2. Chassis Section . 5 2-3. Main Board .6 2-4. Setting the Pointer . 6 3. ELECTRICAL ADJUSTMENTS MW Section. 7 SW Section .7 FM Section .8 4. DIAGRAMS 4-1. Note for Printed Wiring Boards and Schematic Diagrams . 9 4-2. Printed Wiring Boar

8、d Main Section . 10 4-3. Printed Wiring Boards Power Section . 11 4-4. Schematic Diagram . 12 5. EXPLODED VIEWS 5-1. Cabinet (Front) Section . 13 5-2. Cabinet (Rear) Section . 14 6. ELECTRICAL PARTS LIST. 15 RadioFans.CN 3 ICF-704S SECTION 1 GENERALThis section is extracted from instruction manual.

9、2 1 3 4 T U N I N G V O L MINMAX T O N E LOWHIGH A B C OPERATE ($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) batte

10、ry 4 pile R6 (format AA) 4 Mignonzelle (R6/AA) 4 pila R6 (tamao AA) 4 Pila R6 (formato AA) 4 Choosing Power Sources Installing the batteries (See Fig. A) 1Open the lid of the battery compartment. 2Install four R6 (sizeAA) batteries (not supplied) with correct polarity. 3Close the lid. Note When oper

11、ating the unit on batteries, remove the AC power cord from the AC IN jack. The unit cannot be operated on batteries when the AC power cord is connected to the AC IN jack. Battery life (Approx. hours)(JEITA*) When usingFMSWAM(MW)LW Sony alkaline100110110110 LR6 (size AA) Sony R6 (size AA)36404040 * M

12、easured by JEITA (Japan Electronics and Information Technology Industries Association) Standards. The actual battery life may vary depending on the circumstance of the unit. Replacing batteries When the sound becomes weak or distorted, replace all the batteries with new ones. Notes on batteries Do n

13、ot charge the dry batteries. Do not carry the dry batteries with coins or other metallic objects. It can generate heat if the positive and negative terminals of the batteries are accidentally contacted by a metallic object. Do not use different types of batteries at the same time. When you replace t

14、he batteries, replace all with new ones. When you are not going to use the unit for a long time, remove the batteries to avoid damage from battery leakage and corrosion. House Current (See Fig. B) 1Connect the AC power cord (supplied) to the AC IN jack of the radio. 2Plug into a wall outlet. Note Us

15、e only the supplied AC power cord. Operating the Radio 1Press OPERATE ($) to turn on the radio. 2Select a desired band, and tune into 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

16、 obtain clear treble, turn to “HIGH”. To reinforce bass, set to “LOW”. To turn off the radio, press OPERATE (4). To listen with an earphone connect the earphone (not supplied) to the v (earphone) jack. The speaker is deactivated when an earphone is connected. Improving the Reception (See Fig. C) FM:

17、Extend the telescopic antenna and adjust the length and angle for the best reception. SW:Extend the telescopic antenna vertically. AM(MW)/LW: Rotate the unit horizontally for optimum reception. A ferrite bar antenna is built into the unit. Note Adjust the direction of the antenna by holding the bott

18、om of it. The antenna can be damaged when you move the antenna with excessive force. Telescopic antenna Antenne tlescopique Teleskopantenne Antena telescpica Antenna telescopica AC power cord (supplied) Cordon dalimentation secteur Netzkabel (mitgeliefert) Cable de alimentacin de ca (suministrado) C

19、avo di alimentazione CA (in dotazione) Carrying handle Poign de transport Tragegriff Asa de transporte Maniglia di trasporto v AM (MW)/LW AM (PO)/GO FM UKW SW OC KW AC IN Band Gamme Wellenbereich Banda Banda TUNE indicator Indicateur TUNE TUNE-Anzeige Indicador de sintonia (TUNE) Indicatore TUNE To

20、a wall outlet Vers une prise murale An eine Netzsteckdose A la toma de pared Alla presa di rete RadioFans.CN 4 ICF-704S SECTION 2 DISASSEMBLY Note : This set can be disassemble according to the following sequence. 2-1.CABINET (FRONT) ASSY (Page 5) SET 2-2.CHASSIS SECTION (Page 5) 2-3.MAIN BOARD (Pag

21、e 6) 2-4.SETTING THE POINTER (Page 6) RadioFans.CN 5 ICF-704S 2-2. CHASSIS SECTION 2-1. CABINET (FRONT) ASSY Note : Follow the disassembly procedure in the numerical order given. 5two BV tapping screws (B2.6) 6two BV tapping screws (B2.6) 7two BV tapping screws (B2.6) 8screw (M3) 9 qscabinet (rear)

22、assy qdcabinet (front) assy 1knob (TUNE) 0antenna contact plate 4transparent cover claw 2screw (1.7) 3two screws (1.7) qaCN1 handle battery case lid 3chassis section 1 Remove the two solderings. 2two BV tapping screws (B2.6) RadioFans.CN 6 ICF-704S 2-4. SETTING THE POINTER 2-3. MAIN BOARD 4BV tappin

23、g screw (B2.6) 2screw (M2.6) 3VC drum 5claw 6claw D2 7 8 1two knobs (control) 9chassis assy 0MAIN board VC drum boss boss pointer back plate rack rack chassis 1. Rotate the VC drum in the direction of the arrow until it is stopped. 2. Fit the rack on the projection of the chassis. 3. Fit the back pl

24、ate on the bosses and attach the plate. 4. Install the pointer. Setting the Pointer RadioFans.CN 7 ICF-704S 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 fre

25、quency coverage and tracking adjustments should be finally done by the trimmer capacitors. SW FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter L75.85 MHz CT318.25 MHz SW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L65.85 MHz CT218.25 MHz SECTION 3 ELECTRI

26、CAL ADJUSTMENTS SW SECTION BAND switch : SW telescopic antenna terminal 10pF AM RF signal generator 400Hz, 30% AM modulation Output level: as low as possible set 16 set v jack (J1) level meter Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments

27、 should be finally done by the trimmer capacitors. MW IF ADJUSTMENT Adjust for a maximum reading on level meter T1 455 kHz MW FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter L5520 kHz CT1-21,650 kHz MW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L4600 kH

28、z CT1-11,400 kHz MW SECTION BAND switch : MW 16 set v jack (J1) level meter RadioFans.CN 8 ICF-704S telescopic antenna terminal 0.01F FM RF signal generator 22.5kHz frequency deviation by 400Hz signal Output level: as low as possible set 16 set v jack (J1) level meter Repeat the procedures in each a

29、djustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter L386.5 MHz CT1-4109.5 MHz FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L1,

30、 286.5 MHz CT1-3109.5 MHz Adjustment Location: MAIN BOARD FM SECTION BAND switch : FM L1,2 FM TRACKING ADJUSTMENT L6 SW TRACKING ADJUSTMENT CT2 SW TRACKING ADJUSTMENT T1 MW IF ADJUSTMENT L3 FM FREQUENCY COVERAGE ADJUSTMENT L5 MW FREQUENCY COVERAGE ADJUSTMENT L7 SW FREQUENCY COVERAGE ADJUSTMENT CT3 S

31、W FREQUENCY COVERAGE ADJUSTMENT L4 MW TRACKING ADJUSTMENT CT1-4 FM FREQUENCY COVERAGE ADJUSTMENT CT1-3 FM TRACKING ADJUSTMENT CT1-2 MW FREQUENCY COVERAGE ADJUSTMENT CT1-1 MW TRACKING ADJUSTMENT MAIN BOARD (SIDE A) MAIN BOARD (SIDE B) CV1 S1 RV1 RV2 J1 RadioFans.CN 99 ICF-704S SECTION 4 DIAGRAMS 4-1.

32、 NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) For schematic diagrams. Note: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not i

33、ndicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. f: internal component. C : panel designation. For printed wiring boards. Note: X : parts extracted from the component side. Y : parts extracted from the conductor side. a: Through hole

34、. : Pattern from the side which enables seeing. (The other layers patterns are not indicated.) A : B+ Line. H : adjustment for repair. Total current is measured with power on. Power voltage is dc 6V and fed with regulated dc power supply from battery terminal. Voltage is dc with respect to ground un

35、der no-signal (detuned) condition. no mark : FM () : MW 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 f: MW Caution: Pattern face side: Parts on the pattern face side seen from the (Side B)pattern face

36、are indicated. Parts face side:Parts on the parts face side seen from the (Side A)parts face are indicated. Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Q C These are omitted EB RadioFans.CN 1010 ICF-704S 1 A B

37、 C D E F G H I J 234567891011121314 A C11 CT2 CT3 BLK ANT1 FM/SW TELESCOPIC ANTENNA BRN RED CV1 JC1 C10 R3 JW5 JW6 JW14 JW4 R7 C2 C8 C9 C4 C5 C6 R1 C15 CV1-4 CT1-4 (FM OSC) CV1-3 L4 AM FERRITE ROD BAR ANTENNA CT1-3 (FM RF) CV1-1 CT1-1 (AM RF) CV1-2 CT1-2 (AM OSC) L3 C13 C12 C17 C16 R8 RV1S1 (BAND) S

38、W MW FM VOL RV2 TONE CV1 TUNING D2 TUNE RV1 L5 L7 RV2 C39 R12 J1 R10 W2 SP1 SPEAKER SP+ LED METER LED+B +B GND RED BLK D2 SP- GRY RED 12 R5 C23 C22 C27 C24 CF4 C26 JW13 C35 C36 CF1 C31 B C E Q3 Q4 D1 BP1 T1 CF3 CF2 Q2 B C E Q1 B C E B C E JW9 JW8 C32 C30 IC1 BPF1 S1 S1-6S1-5 S1-4S1-3 S1-2S1-1 1 3 16

39、 30 15 1 CN1 POWER BOARD W101 R2 C25 C29 C28 R6 C37 R13 C40 C42 C50 C34 C47 C33 C44 R9 C45 C43 C41 JW16 JW10 JW12 JW11 JW7 JW2 JW3 JW15 C14 C18 JW1 C1 L6 C48 GRY RED BRN BLK L2L1 1-861-802-11 MAIN BOARD 4-2. PRINTED WIRING BOARD MAIN SECTION (Page 11) D1A-8 D2H-3 IC1D-10 Q1E-11 Q2E-12 Q3E-12 Q4C-12

40、Semiconductor Location Ref. No.Location RadioFans.CN 1111 ICF-704S 4-3. PRINTED WIRING BOARDS POWER SECTION 1 A B C D E F G H I J 234567891011121314 W101 W102 C103 GRY RED BLK BLK GRY RED RED BLK BLK RED GRY BLK RED BLK BLK BLK GRY RED 1-861-816-11 1-861-814-11 1-861-815-11 DRY BATTERY SIZE AA (IEC

41、DESIGNATION LR6) 4PCS,6V W102 1 12 3 1 3 AC1 AC2 AC1 AC1 W103 S101 S101 OPERATE ON STANDBY 1 3 1 3 W103 T101 J101 AC IN GRY BLK C101 R101 D101 D102 C102 POWER BOARD AC INLET BOARD SWITCH BOARD A MAIN BOARD CN1 (Page 10) RadioFans.CN 1212 ICF-704S CF3CF2 IC1 CF4 RV1 T1 CF1 RV2 SP1 BPF1 R2 CV1-3 CT1-3

42、 C2 L4 CT1-1 C8C9 S1-3 S1-4 CV1-1 JW1 R3 C10 L6 C11C1 S1-5 C48 JW15 JC1 JW4 JW14 ANT1 D1 BP1 JW5 C24 S1-2 JW7 JW13 R8 C27 C25 C26 L3 CV1-4 CT1-4 C4C5C6R1 JW2 CV1-2 S1-1 C18 C12 C13 C14 C15 C17C16 CT1-2 L5 JW3 R5C23C22CT3L7 R6R7 JW6 JW9 S1-6 Q4 JW8 Q3 C37 R13 C47 C36 Q1 Q2 C31 C30 C32 C35 C33 C39 JW1

43、0 C41 C43 C42 C40 C44 C50 JW12 R10 R9JW11 T101 C101 D101 D102 C102 C103 S101 R101 J1 C29 L1L2 C28 D2 JW16 C45 R12 W103W103 W102W102 W2 CN1 W101 J101 CT2 4-4. SCHEMATIC DIAGRAM RadioFans.CN 13 ICF-704S 1 2 3 4 5 13 6 13 14 7 15 33 8 16 17 18 19 L4 D2 #1 SP1 21 32 20 22 23 23 24 2626 28 25 9 10 11 12

44、29 29 29 30 31 27 Ref. No.Part No.DescriptionRemark 5-1. CABINET (FRONT) SECTION Ref. No.Part No.DescriptionRemark 13-264-585-11SLIDER (BAND SELECTION) 23-264-608-01SPRING (BAND) 33-264-589-01GEAR, MIDWAY 43-264-581-01CHASSIS 53-264-588-01SHAFT (TUNE) 63-264-591-01RACK 73-265-121-01PLATE, BACK 83-26

45、4-590-01POINTER 93-264-586-01DRUM (A), VC 103-264-587-01DRUM (B), VC 113-266-375-01SPRING (DRUM) 123-252-831-01SCREW (M2.6), (+) P 133-252-825-01SCREW (1.7) 143-266-360-01SPRING (TUNING) 153-264-583-01KNOB (TUNE) 163-264-584-01KNOB (CONTROL) 173-252-747-01SPRING, RING 183-264-582-21COVER, TRANSPAREN

46、T 19X-2022-199-1CABINET (FRONT) SUB ASSY 202-024-240-01SPACER (BOSS) 213-264-611-01KNOB (BAND) 3B 223-264-593-01BUTTON (POWER) 233-252-828-01SCREW (B2.6), (+) PWH TAPPING * 24A-4547-217-A MAIN BOARD, COMPLETE 253-264-614-01HOLDER (ANT) 263-252-827-01SCREW (B2.6), (+) BV TAPPING 273-264-607-01TERMINAL, LED CONTACT 283-267-201-01CUSHION (BATTERY CASE LID) 293-254-140-01SCREW (B2.6), (+) BV TAPPING 303-264-613-01LID, BATTERY CASE 312-048-404-11CUSHION (GEAR) 323-553-567-00CUSHION 333-831-441-11CUSHION (B) D28-7