sony_icf-18_service_manual 电路图 维修原理图.pdf

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1、FM/AM RADIO MICROFILM US Model Canadian Model AEP Model UK Model E Model Australian Model SPECIFICATIONS SERVICE MANUAL ICF-18 SECTION 1 GENERAL This section is extracted from instruction manual. RadioFans.CN 2 Note: Follow the disassembly procedure in the numerical order given. CABINET (REAR) SECTI

2、ON 2 DISASSEMBLY KNOB (VOL), KNOB (TUNE) 1 Remove the battery case lid to direction of the arrow. 2 two screws (P 3 14) 4 cabinet (rear) 6 lug 5 screw (P 3 10) 3 three claws 1 two claws 1 two claws 2 knob (tune) 2 knob (vol) knob (tune) screw driver knob (vol) screw driver RadioFans.CN 3 4 Note: Fol

3、low the assembly procedure in the numerical order given. SECTION 3 DIAL POINTER SETTING 1 Slide the pointer to the inner part. 2 Turn the VC gear fully in the arrow B direction. 3 Insert the pointer to the gear fitting the concave position of the pointer to the convex position of the gear. pointer A

4、 Note: When take off the pointer, remove to direction of the arrow A. B SECTION 4 ELECTRICAL ADJUSTMENTS AM Section Setting: Band select switch: AM 0dB=1 V FM Section Setting: Band select switch: FM Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjus

5、tments should be finally done by the trimmer capacitors. FM RF SSG 22.5 kHz frequency deviation by 400 Hz signal Output level: as low as possible + level meter earphone jack set FM antenna terminal 8 AM RF SSG 30% amplitude modulation by 400 Hz signal Output level: as low as possible Put the lead-wi

6、re antenna close to the set. + level meter earphone jack set 8 FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. L375.0 MHz CT1109.5 MHz FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L275.0 MHz CT2109.5 MHz AM FREQUENCY COVERAGE ADJUSTMENT Adjust for

7、 a maximum reading on level meter. L4520 kHz CT31,650 kHz AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L1600 kHz CT41,400 kHz AM IF ADJUSTMENT Adjust for a maximum reading on level meter. T1455 kHz Adjustment Location: MAIN board (Component Side) AM FREQUENCY COVERAGE CT3 L4 C

8、T1 L3 FM FREQUENCY COVERAGE FM antenna terminal L1 CT4 AM TRACKING T1 AM IF L2 CT2 FM TRACKING IC1 S1 (BAND SELECT) SWITCH FMAMOFF JW4 RadioFans.CN CF2 CF3 mark 5 6 ICF-18 SECTION 5 DIAGRAMS 5-1.SCHEMATIC DIAGRAM 5-2.PRINTED WIRING BOARDS MarkCenter frequency red10.70 MHz blue10.67 MHz orange10.73 M

9、Hz black10.64 MHz white10.76 MHz HOW TO CHANGE THE CERAMIC FILTERS This model is used two ceramic filters of CF2, CF3. 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 piece

10、s in one package as a spare parts. IC Block Diagram IC1CXA1019S 123456789101514131211 FM DISCRIMINATOR AF POWER AMPAM FEFM IF TUNING METER AM IF DET AGC FM FE 232221202425191817162928272630 GND GND AF OUT VCC RIPPLE FILTER AF IN DET OUT AFC AGC AFC AGC IF GND METER N.C FM IF IN AM IF IN FM/AM BAND S

11、ELECT FM/AM IF OUT N.C FE GND AM RF IN FM RF REG OUT FM OSC FM RF IN AFC AM OSC VOL NF FM DISCRI GND GND Note on Schematic Diagram: 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 unl

12、ess otherwise specified. : internal component. : panel designation. : B+ Line. : adjustment for repair. Power voltage is dc 3 V and fed with regulated dc power supply from battery terminal. Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : FM () : AM : FM/AM Volt

13、ages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. Signal path. : FM Note on Printed Wiring Board: : parts extracted from the component side. p: parts mounted on the conductor side. : internal component. : Pattern from the side whic

14、h enables seeing. RadioFans.CN 7 SECTION 6 EXPLODED VIEW Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. The mechanical parts with no reference num- ber in the exploded views are not supplied. Hardware (

15、# mark) list and accessories and packing materials are given in the last of the electrical parts list. NOTE: -XX and -X mean standardized parts, so they may have some difference from the original one. Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE) . . . (RED) Parts Color Cabinet

16、s Color Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark * 9A-3662-892-A MAIN BOARD, COMPLETE (US) * 9A-3679-659-A MAIN BOARD, COMPLETE (EXCEPT US) 103-920-188-01 GEAR, VC 113-925-513-01 SHEET (BAND) * 121-656-281-11 POSITIVE TERMINAL BOARD ANT11-501-774-11 ANTENNA, TELESCOPIC (FM)

17、 SP11-504-861-11 SPEAKER (9.2CM) 13-017-750-01 PLATE, TRANSPARENT 23-017-752-01 KNOB (TUNE) 33-017-753-01 KNOB (VOL) 43-017-749-01 CABINET (FRONT) 53-920-194-01 TERMINAL (), BATTERY 63-017-751-01 POINTER 73-920-185-01 CABINET (REAR) 83-905-428-11 LID, BATTERY CASE #1 #2 #3 1 2 3 4 5 SP1 6 not suppli

18、ed ANT1 7 8 not supplied 11 9 10 12 RadioFans.CN 8 SECTION 7 ELECTRICAL PARTS LIST Ref. No.Part No.DescriptionRemark NOTE: Due to standardization, replacements in the parts list may be different from the parts speci- fied in the diagrams or the components used on the set. -XX and -X mean standardize

19、d parts, so they may have some difference from the original one. RESISTORS All resistors are in ohms. METAL: Metal-film resistor. METAL OXIDE: Metal oxide-film resistor. F: nonflammable Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipa

20、ted when order- ing these items. SEMICONDUCTORS In each case, u: , for example: uA. .: A. .uPA. . : PA. . uPB. .: PB. .uPC. . : PC. . uPD. .: PD. . CAPACITORS uF: F COILS uH: H Ref. No.Part No.DescriptionRemark When indicating parts by reference number, please include the board. *A-3662-892-AMAIN BO

21、ARD, COMPLETE (US) *A-3679-659-AMAIN BOARD, COMPLETE (Canadian, AEP, UK, E, AUS) * C11-102-945-00 CERAMIC8.0PF0.5PF50V C21-101-004-00 CERAMIC0.01uF50V C31-124-907-11 ELECT10uF20%50V C51-102-953-00 CERAMIC18PF5%50V C61-102-961-00 CERAMIC27PF5%50V C71-102-944-00 CERAMIC7.0PF0.5PF50V C81-101-004-00 CER

22、AMIC0.01uF50V C91-126-963-11 ELECT4.7uF20%50V C101-101-004-00 CERAMIC0.01uF50V C111-124-907-11 ELECT10uF20%50V C121-126-963-11 ELECT4.7uF20%50V C141-162-843-11 CERAMIC0.022uF10%16V C151-124-903-11 ELECT1uF20%50V C161-124-907-11 ELECT10uF20%50V C171-126-941-11 ELECT470uF20%6.3V C181-162-851-11 CERAMI

23、C0.1uF10%16V C191-126-941-11 ELECT470uF20%6.3V C201-101-880-00 CERAMIC47PF5%50V CF11-577-072-11 FILTER, CERAMIC CF21-760-144-61 FILTER, CERAMIC CF31-760-144-61 FILTER, CERAMIC CV11-141-529-11 CAP, VAR (TUNING) CT1-41-141-529-11 CAP, VAR D18-719-911-19 DIODE 1SS119 IC18-752-055-05 IC CXA1019S J11-770

24、-666-11 JACK ( ) L11-501-770-11 ANTENNA, FERRITE-ROD (AM) L21-406-546-11 COIL, AIR-CORE (FM RF) * L31-428-306-11 COIL, AIR-CORE (FM OSC) L41-406-028-00 COIL, OSC (AM OSC) R11-249-422-11 CARBON2.7K5%1/4W R51-249-397-11 CARBON225%1/4W R61-249-421-11 CARBON2.2K5%1/4W R71-249-433-11 CARBON22K5%1/4W R81-

25、249-427-11 CARBON6.8K5%1/4W (US) RV11-228-790-00 RES, VAR, CARBON 50K (VOLUME) S11-762-356-11 SWITCH, SLIDE (FM/AM/OFF) T11-404-790-11 TRANSFORMER, IF (AM IF) * MISCELLANEOUS * * 121-656-281-11 POSITIVE TERMINAL BOARD ANT11-501-774-11 ANTENNA, TELESCOPIC (FM) SP11-504-861-11 SPEAKER (9.2CM) * * HARD

26、 WARE LIST * #17-623-508-01 LUG, 3 #27-685-647-79 SCREW +P 3X10 TYPE2 NON-SLIT #37-685-649-79 SCREW +P 3X14 TYPE2 NON-SLIT * MAIN RadioFans.CN 9 Ref. No.Part No.DescriptionRemark ACCESSORIES & P ACKING MA TERIALS * 3-860-966-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH, GERMAN , SPANISH, SWEDISH, PORTUGU

27、ESE, ARABIC, RUSSIAN) (EXCEPT US) 3-860-966-21 MANUAL, INSTRUCTION (ENGLISH) (US) 3-923-510-01 BELT (SHOULDER) 3-925-458-01 STOPPER, BELT RadioFans.CN 10 Sony Corporation Personal & Mobile Communication Company9-925-741-11 ICF-18 97I0594-1 Printed in Japan 1997. 9 Published by Quality Assurance Dept. RadioFans.CN