IC-R3_serv.pdf

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1、SERVICE MANUAL 6-9-16, Kamihigashi, Hirano-ku, Osaka, 547-0002, Japan S-13703IZ-CD 2000 Icom Inc. COMMUNICATIONS RECEIVER Downloaded by? ? Amateur Radio Directory 6-9-16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan Phone : 06 6793 5302 Fax: 06 6793 0013 URL: http:/www.icom.co.jp/world/index.html C

2、ommunication Equipment Himmelgeister Str. 100, D-40225 Dsseldorf, Germany Phone: 0211 346047Fax : 0211 333639 URL: Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. Phone: 01227 741741 Fax : 01227 741742 URL: http:/www.icomuk.co.uk Zac de la Plaine, Rue Brindejonc des Moulinais BP 5804, 31505 Toulouse

3、 Cedex, France Phone: 561 36 03 03Fax : 561 36 03 00 URL: http:/www.icom- Crta. de Gracia a Manresa Km. 14,750 08190 Sant Cugat del Valles Barcelona, SPAIN Phone: (93) 590 26 70 Fax : (93) 589 04 46 URL: 2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A. Phone: (425) 454-8155Fax : (425) 454-1509 URL

4、: Phone: (425) 454-7619 Glenwood Centre #150-6165 Highway 17 Delta, B.C., V4K 5B8, Canada Phone: (604) 952-4266Fax : (604) 952-0090 URL: A.C.N. 006 092 575 290-294 Albert Street, Brunswick, Victoria, 3056, Australia Phone: 03 9387 0666Fax : 03 9387 0022 URL: .au 6F No. 68, Sec. 1 Cheng-Teh Road, Tai

5、pei, Taiwan, R.O.C. Phone: (02) 2559 1899Fax : (02) 2559 1874 INTRODUCTION DANGER ORDERING PARTS REPAIR NOTES This service manual describes the latest service information for the IC-R3 at the time of publication. NEVER connect the receiver to an AC outlet or to a DC power supply that uses more than

6、16 V. Such a connection could cause a fire hazard and/or electric shock. DO NOT expose the receiver to rain, snow or any liquids. DO NOT reverse the polarities of the power supply when con- necting the receiver. DO NOT apply an RF signal of more than 20 dBm (100mW) to the antenna connector. This cou

7、ld damage the receivers front end. Be sure to include the following four points when ordering replacement parts: 1. 10-digit order numbers 2. Component part number and name 3. Equipment model name and unit name 4. Quantity required 1140008440 S.ICAK93C10AIC-R3LOGIC UNIT5 pieces 8810009560 ScrewBT M2

8、 x 6 ZKIC-R3Chassis10 pieces Addresses are provided on the inside back cover for your convenience. 1. Make sure a problem is internal before disassembling the receiver. 2. DO NOT open the receiver until the receiver is disconnected from its power source. 3. DO NOT force any of the variable component

9、s. Turn them slowly and smoothly. 4. DO NOT short any circuits or electronic parts. An insulated turning tool MUST be used for all adjustments. 5. DO NOT keep power ON for a long time when the receiver is defective. 6. READ the instructions of test equipment thoroughly before connecting equipment to

10、 the receiver. To upgrade quality, all electrical or mechanical parts and internal circuits are subject to change without notice or oblig- ation. TABLE OF CONTENTS SECTION1SPECIFICATIONS SECTION2INSIDE VIEWS SECTION3DISASSEMBLY INSTRUCTIONS SECTION4CIRCUIT DESCRIPTION 4 - 1RECEIVER CIRCUITS. . . . .

11、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1 4 - 2PLL CRICUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 5 4 - 3FM-TV CIRCUIT . . . . . . . . . . . . . . . . . . .

12、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 6 4 - 4POWER SUPPLY CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 8 4 - 5PORT ALLOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13、 . . . . . . . . . . . . . . . . . 4 - 8 SECTION5ADJUSTMENT PROCEDURES 5 - 1PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1 5 - 2PLL ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14、. . . . . . . . . . . . . . . . . . . 5 - 3 5 - 3RECEIVER ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 5 5 - 4TFT LCD AND FM-TV UNIT ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 7 SECTION6PA

15、RTS LIST SECTION7MECHANICAL PARTS AND DISASSEMBLY SECTION8SEMI-CONDUCTOR INFORMATION SECTION9BOARD LAYOUTS 9 - 1VCO AND RF-B UNITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1 9 - 2FM-TV UNIT . . . . . . . . . . . . . . . . . . . . . .

16、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 3 9 - 3LOGIC UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 5 9 - 4RF UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 7 SECTION10BC-135 OPTIONAL DESKTOP CHARGER INFORMATION 10 - 1PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 1 10 - 2DISASSEMBLY INFORMATION. . .

18、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 1 10 - 3VOLTAGE DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 2 10 - 4BOARD LAYOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19、 . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 3 SECTION11BLOCK DIAGRAM SECTION12VOLTAGE DIAGRAM 12 - 1VCO UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 1 12 - 2RF-B UNIT . . . . . . . . . . . . . . . . .

20、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 2 12 - 3FM-TV UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 3 12 - 4LOGIC UNIT . . . . . . . . . . . . . . . . . . . . . . . .

21、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 4 12 - 5RF UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 5 MGENERAL Frequency range: 0.4952450.095 MHz Mode: F3, A3, C3F (TV) No. of mem

22、ory channel: 450 channels Frequency stability: 6 ppm max. (10C to +50) Tuning steps: 5, 6.25, 10, 12.5, 15, 20, 25, 30, 50, and 100 kHz Anntena connector: BNC (50 ) Power supply requirement: Polarity: Negative ground Frequency resolution: 5 kHz, 6.25 kHz Current drain (at 4.5 V): (Typical) Usable te

23、mperature range: 10C to +60C ( 14F to +140F) Dimensions: 61(W) 120(H) 32.9(D) mm; (projections not included)21332(W) 42332(H) 1932(D) in Weight(w/ antenna and battery): 300 (g); 10.6 (oz) External SP connector: 3-conductor 3.5(d) mm (18”)/8 Video/Audio OUT connector: 3-conductor 3.5(d) mm (18”)/8 MR

24、ECEIVER Receiver system: Tripple super heterodyne Intermediate frequencies: (Unit; MHz) * 130799.995 MHz and 13212099.995 MHz range * 28001320.995 MHz and 21002450.095 MHz range Converter frequency: 1291, 1320 or 1351 MHz (More than 1150 MHz) Sensitivity* : (except spurious points) * FM and WFM are

25、measured at 12 dB SINAD; AM is measured at 10 dB S/N. Squelch Sensitivity: Selectivity: AM / FMmore than 12 kHz/6dB less than 30 kHz/50 dB WFMmore than 150 kHz/6 dB Audio output power: 100 mW typical at 10% distortion with an 8 load Audio output impedance: 8 1 - 1 SECTION 1SPECIFICATIONS All stated

26、specifications are subject to change without notice or obligation. Frequency (MHz) 0.495 1.625 1.625 5.0 5.0 30.0 30.0 76.0 76.0 108.0 108.0 118.0 118.0 136.0 136.0 175.0 175.0 222.0 222.0 330.0 330.0 470.0 470.0 770.0 770.0 800.0 800.0 1300.0 1300.0 2000.0 2000.0 2300.0 2300.0 2450.095 FM 0.56 V 0.

27、4 V 0.56 V 0.79 V 1 V 1.4 V 2.5 V WFM 1.8 V 1.8 V 2.5 V AM 2.5 V 1.8 V 1.8 V 1.8 V Battery 3 alkaline cell 3 AA(R6) Ni-Cd 1 Li-ion External DC supply Voltage DC 4.5 V DC 3.6 V DC 3.7 V DC 3.66.3 V Receiving condition Rated audio Standby Power saved (1:4) TV reception LCD lighting TV sound receiving

28、Except converter 210 mA 140 mA 65 mA 730 mA 210 mA Converter area 250 mA 180 mA 75 mA 780 mA 250 mA Frequency (MHz) 0.495 1.625 1.625 5.0 5.0 30.0 30.0 76.0 76.0 108.0 108.0 118.0 118.0 136.0 136.0 175.0 175.0 222.0 222.0 330.0 330.0 470.0 470.0 770.0 770.0 800.0 800.0 1300.0 1300.0 2000.0 2000.0 23

29、00.0 2300.0 2450.095 FM 0.56 V 0.4 V 0.56 V 0.79 V 1 V 1.4 V 2.5 V WFM 10.0 V 10.0 V 10.0 V AM 2.5 V 1.8 V 1.8 V 1.8 V 1ST IF 2ND IF 3RD IF AM, FM 240.1 26.05 0.450 WFM 240.1 13.25 0.450 C3F (TV) 241.85* 1, 238.35*2 58.75 SECTION 2INSIDE VIEWS 2 - 1 RF, RF-B, VCO AND FM-TV UNITS LOGIC UNIT 2nd IF ci

30、rcuit (FI3: FL-319) FM-TV UNIT (OTH-2 only) RF-B UNIT VCO UNIT RF UNIT CPU system clock (X1: CR-613) Power amplifier (IC3: XC62FP3002MR) DC-DC converter CPU (IC1: M38267M8L-256GP) PLL converter circuit (IC15: TA31056F) IC801: MB3776APFV Q804: 2SK2493 T1: TO-47 SECTION 3DISASSEMBLY INSTRUCTIONS 3 - 1

31、 REMOVING THE REAR PANEL 1 Unscrew 3 screws, A. 2 Unscrew 1 screw, B. 3 Remove the rear panel in the direction of the arrow. 4 Unplug speaker connector to separate front panel and rear panel. REMOVING THE LOGIC UNIT 1 Unscrew 1 screw, D. 2 Remove the LOGIC unit in the direction of the arrow. REMOVIN

32、G THE RF UNIT 1 Remove the 1 knob and unscrew 2 nuts. 2 Unscrew 3 screws, E, and unsolder 8 points, F. Unsolder 1 points, H (OTH-2 only). 3 Remove the shield plate. 4 Unsolder 3 points, G, and remove the RF unit. Rear Panel Speaker connector B A D LOGIC unit E RF unit Shield plate Nuts Knob G E H F

33、F F SECTION 4CIRCUIT DESCRIPTION 4 - 1 4-1 RECEIVER CIRCUITS 4-1-1 RF SWITCHING CIRCUIT (RF UNIT) (1) Below 1150 MHz The RF signals from the antenna connector pass through the band switching diode (D2) and an attenuator (D12, D13). The signals are then applied to the RF circuit which sup- press out-

34、of-band signals via the band switching diode (D911). (2) Above 1150 MHz The RF signals from the antenna connector pass through the limitter (D1), band switching diode (D909) and high-pass filter (C932C936, C963, C964, L911, L912, L914). The fil- tered signals are applied to the AF amplifier (IC14, p

35、in 1), and are then applied to the convertor circuit (IC13, pin 1). Above 1150 MHz RF signals are mixed with “CONLO” signal from CONV VCO circuit for convertion into below 1150 MHz RF signals at the converter circuit (IC13). The converted sig- nals are output from IC13 (pin 6), and are then applied

36、to the RF circuit which suppress out-of-band signals. 4-1-2 RF CIRCUIT (RF AND RF-B UNITS) The RF circuit amplifies the received signals within the range of frequency coverage and filters out-of-band signals. (1) 0.495 MHz29.995 MHz RF signals (0.495 MHz29.995 MHz) from the RF switching circuit pass

37、 through a low-pass filter (C321C325, L81, L82). The filtered signals are amplified at an RF amplifier (Q3) passing through each low-pass, bandpass, high-pass filter depending on the receiving frequency. The amplified signals are then applied to the 1st mixer circuit (IC1) via the band switching dio

38、de (D10). The signals below 1.9 MHz pass through a low-pass filter (C344C347, L89, L90) between the band switching diode (D4, D7), and are then applied to the RF amplifier circuit (Q3). The 1.9 MHz14.995 MHz signals pass through the band switching diode (D5) and bandpass filter (C332C341, L85L88), a

39、nd are then applied to the RF amplifier circuit (Q3) via the band switching diode (D8). The 15 MHz29.995 MHz signals pass through the band switching diode (D6) and high-pass filter (C326C330, L83, L84) and are then applied to the RF amplifier circuit (Q3) via the band switching diode (D9). (2) 30 MH

40、z224.995 MHz (RF-B UNIT) RF signals (30 MHz64.995 MHz, 65 MHz107.995 MHz, 108 MHz173.995 MHz, 174 MHz224.995 MHz) from the RF switching diode (RF unit; D11) are passed through the low-pass filter (RF unit; C12C17, L57L59). The filtered signals pass through the each bandpass filters and RF amplifier

41、depending on the receiving frequency. The signals are then applied to the 1st mixer circuit (RF unit; IC1). The 30 MHz64.995 MHz signals pass through the band switching diode (D403) and bandpass filter (D401), and are then amplified at the RF amplifier (Q401). The amplified sig- nals pass through th

42、e bandpass filter (D402) and band switching diode (D404). RF CIRCUIT ANT ANT SW D909, D912 CONLO signal from the CONV VCO circuit ANT SW D2, D911 IC13 Below 1150 MHz RF signals Above 1150 MHz RF signals LPFLPF ANT SW BPF RF D4D9 ANT SW D3, D10 0.495 30 MHz 30 225 MHz 330 470 MHz 470 800 MHz 225 330

43、MHz, 800 1150 MHz Q3 LPF ANT SW BPFBPF RF D403, D404 D503, D504 D603, D604 D703, D704 ANT SW D11 Q401, Q501, Q601, Q701 BPFBPF RF ANT SW D21, D24Q7 BPFBPF RF ANT SW ANT SW D803, D804 D853, D854 D805 Q801, Q851 LPF BPF RF ANT SW D33, D35, D36 Q8, Q9 1st LO IC1 D902 D1 to the FM-TV circuit to the 2nd

44、mixer circuit FM-TV UNIT RF-B UNIT Displayed frequency CONVERTED RF FREQUENCY LIST RF frequency 1150.0001176.000 1176.0051229.995 1230.0001255.000 1255.0051286.000 1286.0051320.995 1321.0001349.995 1350.0001384.995 1385.0001394.995 1395.0001427.995 1428.0001515.995 1516.0001569.995 1570.0001579.995

45、1580.0001739.995 1740.0001789.995 1790.0001809.995 1810.0001849.995 1850.0002039.995 2040.0002109.995 2110.0002204.995 2205.0002250.995 2251.0002450.095 141.000115.000 143.99590.005 61.00036.000 64.99534.000 64.99530.005 30.00058.995 30.00064.995 94.000103.995 75.000107.995 137.000224.995 196.000249

46、.995 250.000259.995 289.000448.995 420.000469.995 499.000518.995 490.000529.995 559.000748.995 720.000789.995 819.000913.995 885.000930.995 960.0001159.095 4 - 2 The 65 MHz107.995 MHz signals pass through the band switching diode (D503) and bandpass filter (D501), and are then amplified at the RF am

47、plifier (Q501). The amplified sig- nals pass through the bandpass filter (D502) and band switching diode (D504). The 108 MHz173.995 MHz signals pass through the band switching diode (D603) and bandpass filter (D601), and are then amplified at the RF amplifier (Q601). The amplified sig- nals pass thr

48、ough the bandpass filter (D602) and band switching diode (D604). The 174 MHz224.995 MHz signals pass through the band switching diode (D703) and bandpass filter (D701), and are then amplified at the RF amplifier (Q701). The amplified sig- nal pass through the bandpass filter (D702) and band switchin

49、g diode (D704). (3) 330 MHz469.995 MHz RF signals (330 MHz469.995 MHz) from the RF switching circuit pass through the band switching diode (D21) and a bandpass filter (C19C27, L2L5, L39). The filtered signals are amplified at an RF amplifier (Q7), and then passed through the bandpass filter (D22, D23). The filtered signals are then applied to the 1st mixer circuit (IC1) via the band switching diode (D24). (4) 470 MHz799.995 MHz RF signals (470 MHz799.995 MHz) from the RF switching circuit