IC-R1500_IC-R2500_serv.pdf

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1、iC-r1500 iC-r2500 S-14233MZ-C1 Jun. 2006 COMMUNICATIONS RECEIVERS ? ? This service manual describes the latest service information for the IC-R1500 and IC-R2500 COMMUNICATIONS RECEIVERS at the time of publication. Be sure to include the following four points when ordering replacement parts: 1. 10-di

2、git Icom parts numbers 2. Component name and informations 3. Equipment model name and unit name 4. Quantity required 1110001811 S.IC TA7S04F IC-R2500 Main-A unit 5 pieces 8810008960 Screw FH M2.6 IC-R2500 Chassis 8 pieces Addresses are provided on the inside back cover for your convenience. NEVER co

3、nnect the receiver to an AC outlet or to a DC power supply that uses more than 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 connecting the receiver. DO NOT appl

4、y an RF signal of more than 20 dBm (100 mW) to the antenna connector. This could damage the receivers front end. 1. Make sure a problem is internal before disassembling the receiver. 2. DO NOT open the transceiver until the receiver is disconnected from its power source. 3. DO NOT force any of the v

5、ariable components. 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 connec

6、ting equipment to the receiver. To upgrade quality, any electrical or mechanical parts and internal circuits are subject to change without notice or obligation. Icom, Icom Inc. and logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France,

7、Spain, Russia and/or other countries. INTRODUCTIONCAUTION ORDERING PARTSREPAIR NOTES MODELVERSIONSYMBOL IC-R1500 IC-R2500 EuropeEUR U.K.UK U.S.A.USA CanadaCAN FranceFRA South East AsiaSEA Export EXP EXP-1 IC-R2500*U.S.A.USA-2 *UT-122 is already installed as DIGITAL UNIT. (IC-R2500) (IC-R1500) TABLE

8、OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPITON 4-1 RECEIVER CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-2 PLL CIRCUITS . . . . . . . . . . .

9、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 4-3 DIGITAL MODE OPERATION WITH UT-122. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 4-4 POWER SUPPLY CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . .

10、. . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 4-5 CPU PORT ALLOCATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 5-2 MAIN-A UNIT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 5-3 MAIN-B UNIT ADJUSTMENT (R2500 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12、. . . . . . 5-5 SECTION 6 PARTS LIST SECTION 7 MECHANICAL PARTS AND DISASSEMBLY SECTION 8 SEMICONDUCTOR INFORMATION SECTION 9 BOARD LAYOUTS 9-1 LOGIC UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 9-2 MAIN-A UNIT

13、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3 9-3 MAIN-B UNIT (R2500 only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5 9-4 CONTROL UNITS . . . . . . . .

14、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7 9-4 UT-122 (Optional product; DIGITAL UNIT for R2500; USA-2). . . . . . . . . . . . . . . . . . . . . . . . . 9-7 SECTION 10 BLOCK DIAGRAM SECTION 11 VOLTAGE DIAGRAM 1 - 1 SECTION 1 SPECIFICATIO

15、NS M GENERAL Frequency coverage * 999999.908000010.0 : ,1 *2 999999.668000.158 000000.0031000.698 999999.0181100000.0031 * 999999.7681000.2581 1 * 999998.5032000.7981 1 * 999999.1182000.7532 1 * 999999.8682000.3582 1 * 999997.9013000.8982 ,1 *2 * 999997.4513000.6313 ,1 *2 * 999999.9923000.1813 ,1 *2

16、 *1 : For IC-R2500. Available on Main band only. Sub band does not cover outside of frequency range; 50 to 1300.000000 MHz. *2 : Guaranteed: 0.4953000.000 MHz range only Mode:FM, AM, WFM, USB*1, LSB*1, CW, DV*1,*2, P25*1,*3 *1 : For R2500. Available on Main band only. *2 : For R2500. Available when

17、optional UT-118 is installed. *3 : For R2500. Available when optional UT-122 is installed, and depending on versions. Number of memory channels:2600 Tuning steps:1 Hz, 10 Hz, 20 Hz, 50 Hz, 100 Hz, 500 Hz, 1 kHz, 2.5 kHz, 5 kHz, 6.25 kHz, 8.33 kHz, 9 kHz, 10 kHz, 12.5 kHz, 15 kHz, 20 kHz, 25 kHz, 30

18、kHz, 50 kHz, 100 kHz, 125 kHz, 150 kHz, 200 kHz, 500 kHz, 1 MHz, 10 MHz, USER TS Operating temperature range:0C to +60C; +32F to +140F * 999999.92000010.0 : ,1 *2 000002.15002.05 999999.701005.78 00000.641000.441 00000.044000.034 00000.0031000.0421 * 999999.9923010.0 : ,1 *2 Current drain (at 12.0 V

19、 DC: approx.) 1500 POWER ONStandby 650 mA Max. audio Less than 1.2 A *While using controller (R1500): plus 50 mA with above current value. 1500/2500 POWER OFFPC (USB VBAS-ON) 550 mA typ. PC (VBAS-OFF) 15 mA typ. Controller (R1500) 15 mA 2500 single band operationStandby 650 mA Max. audio Less than 1

20、.2 A Dualwatch operationStandby 850 mA Max. audio Less than 1.5 A *While using controller (R2500): plus 110 mA with above current value. Frequency stability:3 ppm (10C to +60C) Power supply requirement:12 V DC 15% (Negative ground) Current drain (At 12 V DC ; approx.) Dimensions (projections not inc

21、luded):146(W)41(H)206(D) mm; 534(W)158(H)818(D) in 111(W)40(H)26.5(D) mm; 438(W)1916(H)8132(D) in 140(W)50(H)27.5(D) mm; 512(W)13132(H)1332(D) in Weight (approx.): MAIN UNIT1.2 kg; 2 lb 10 oz (1500) 1.35 kg; 2 lb 15 oz (2500) CONTROLLER0.2 kg; 2 lb 71732 oz (1500) 0.25 kg; 2 lb 81316 oz (2500) Anten

22、na connector:BNC (50 ) .A.S.U ecnarF evoba naht rehtO MFW)DANIS Bd21 ; . veD z Hk5.25 / z Hk1( V4.1 naht sseL:zHM999.996000.05 V8.1 naht sseL:zHM000.0031000.007 : zHM999.9922100000.0031V81 naht sseL V65 naht sseL:zHM000.0003000.0032 y MF)DANIS Bd21 ; . veD zHk5.3 / z Hk1( V36.0 naht sseL:zHM999.9200

23、0.82 V36.0 naht sseL:zHM999.94000.03 V5.0 naht sseL:zHM999.932000.05 V5.0 naht sseL:zHM999.972000.042 V5.0 naht sseL:zHM999.992000.082 V5.0 naht sseL:zHM999.996000.003 V36.0 naht sseL:zHM000.0031000.007 : zHM999.9922100000.0031V6.5 naht sseL V81 naht sseL:zHM000.0003000.0032 MA)N/S Bd01 ; .DOM %03/

24、zHk1( V52 naht sseL:zHM997.1594.0 V5.2 naht sseL:zHM999.41008.1 V5.2 naht sseL:zHM999.94000.51 V2 naht sseL:zHM999.992000.05 V2 naht sseL:zHM999.996000.003 V5.2 naht sseL:zHM000.0031000.007 WC/BSS)N/S Bd01( V5 naht sseL:zHM997.1594.0 V5.0 naht sseL:zHM999.41008.1 V5.0 naht sseL:zHM999.94000.51 V4.0

25、naht sseL:zHM999.996000.05 V5.0 naht sseL:zHM000.0031000.007 M RECEIVER Receive system:Triple-conversion superheterodyne and down converter Intermediate frequencies:1st: 266.700 MHz, 2nd: 10.700 MHz, 3rd: 450 kHz (except for WFM mode) Sensitivity: 1 - 2 Selectivity:y ) l ac i py t ( Bd 6/ zHk 8.2 na

26、ht eroMMA/WC/BSS ) l ac i py t ( Bd 6 / z Hk 0.6 naht eroMMF/MA/WC/BSS ) l ac i py t ( Bd 6/ zHk 51 naht eroMMF/MA ) l ac i py t ( Bd 6 / z H k 05 naht eroMMFW/MF/MA ) l ac i py t ( Bd6 / z Hk032 naht eroMMFW Audio output power :More than 0.5 W (at 10% distortion with an 8 load) Ext. speaker connect

27、or:2-conductor 3.5 (d) mm (18)/8 Packet connector:2-conductor 3.5 (d) mm (18) Data connector:3-conductor 2.5 (d) mm (110) IF shift variable range :More than 1.2 kHz All stated specifications are subject to change without notice or obligation. 2 - 1 SECTION 2 INSIDE VIEWS LOGIC UNIT TOP VIEW BOTTOM V

28、IEW +33V regulator IC2: BA6161F D2: 1SS355 VSC/TONE filter (IC2021: LM2904) IC-R2500 only AF +8V regulator (Q5: 2SB1201, Q8: XP1501) AF amplifier (IC12: LA4425A) USB HUB (IC32: USB2502) USB +3.3V regulator IC1: S-812C33 Q31: 2SB789 Q32: 2SC4116 VCC line controller Q4: 2SJ377 Q6: DTC144EU 5V regulato

29、r IC8: PC1553 D6: 1SS272 D8: MA8051 VSC/TONE filter (IC21: LM0904) AF selecter (IC23: SN74AHC2053) AF selecter (IC2023: SN74AHC2053) IC-R2500 only USB audio IC (IC16: PCM2901M) Electric VR (IC17: SM6451B) AF amplifier (Q18: 2SC4617) AF amplifier (Q2018: 2SC4617) IC-R2500 only CPU5V regulator (IC3: X

30、C6202P502PR) L5V regulator (IC9: AN78L05) CPU reset IC (IC35: S-80942) SP mute switch (Q12: 2SC4213) CPU (IC18: M30624FGPGP) DTMF decoder (IC19: BU8872FS) A+5V regulator (IC6: TA7805) A+8V regulator (IC7: AN7708) B+5V regulator (IC2006: TA7805F) IC-R2500 only B+8V regulator (IC2007: TA7708SP) IC-R25

31、00 only Clock oscillator (X2: CR-818 4.19304 MHz) () () () () Down converter circuit 1st VCO circuit 2nd VCO circuit DDS circuit RF circuits MAIN-A UNIT Noise blanker amplifier (Q68: 2SK882) APCO5V regulator (Q77: 2SA1832) Buffer (Q60: 2SC4617) AM detecter circuit WFM IF IC (IC16: LA1145M) IF IC (FM

32、) (IC24: TA31136) RSSI meter amplifier (IC25: NJM2904V, D80: 1SS400) AGC amplifier (Q58: 2SC4617) 2nd IF amplifier (Q66: 3SK131) 2nd mixer (IC19: TA4107F) 1st IF amplifier (Q44: 3SK131) 1st mixer (IC14: SPM5001) +5V regulator (Q23: UNR9111) DVCO +5V regulator (Q78: UNR9111) DPLL 3.3V regulator (IC2:

33、 S-812C33AMC) D3.3V regulator (Q10: UNR9111) IF IC (Band scope) (IC20: TA31136) ATT circuits TOP VIEW BOTTOM VIEW SSB decoder (IC23: TA4101F) DDSREF 8V regulator (D120: DAN222) DDS REF 8V regulator (Q90: XP4311) HF 8V regulator (Q25: XP4311) HF band RF amplifier (Q22: 2SC5226) PLL 3.3V regulator (IC

34、9: S-812C33AMC) 2 - 2 MAIN-B UNIT (IC-R2500 only) UT-122 (Optinal product; DIGTAL UNIT for IC-R2500: USA-2) Noise blanker (Q68: 2SK882) BAPCO5V regulator (Q77: 2SA1832) 3rd IF filter (FI1: CFWKA450) Buffer (Q60: 2SC4617) AM detecter circuit IF IC (WFM) (IC16: LA1145M) IF IC (FM) (IC24: TA31136) AGC

35、amplifier (Q58: 2SC4617) 2nd IF amplifier (Q66: 3SK131) 2nd mixer (IC19: TA4107F) 1st IF amplifier (Q44: 3SK131) 1st mixer (IC14: SPM5001) +5V regulator (Q23: UNR9111) ATT circuit HF filters 1st VCO circuit 2st VCO circuit TOP VIEWBOTTOM VIEW TOP VIEWBOTTOM VIEW RSSI meter amplifier (IC25: NJM2904V

36、D80: 1SS400) PLL 3.3V regulator (IC9: S-812C33AMC) Clock oscillator (X1: CR-798) Liner codec (IC9: AK4550VT) EEPROM (IC17: HN58X2416TI) CPU (IC12: HD64F2239TE16) 2 - 3 CONTROL UNIT (R1500) CONTROL UNIT (R2500) Color controller (Q6,Q7: 2SC4116) Control unit CPU (IC6: HD6433842RB36H) Reset IC (IC2: S-

37、80945CLMC-G7F) +5V regurator IC5: TA78L05F D4: MA8062 +8V regurator Q1: 2SC4116 Q3: 2SA1734 D5: MA8068 Color controller (Q6, Q7: 2SC4116) Control unit CPU (IC6: HD6433842RB36H) Reset IC (IC2: S-80945CLMC-G7F) +5V regulator IC5: TA78L05F D4: MA8062 +8V regulator Q1: 2SC4116 Q3: 2SA1734 D5: MA8068 Dim

38、mer +8V regurator (Q1: 2SC4116) +5V regurator (IC3: TA78L05F) Sub CPU (IC4: HD6473847RH) Reset IC (IC2: S-80945CLMC) Data comparator (IC1: TA75S01F) LED drivers (Q6-Q13: 2SC4116) +8V regurator Q1: 2SC4116 Q3: 2SA1586 D1: MA8091 +5V regurator (IC3: TA78L05F) Control unit CPU (IC4: HD6473847RH) Reset

39、IC (IC2: S-80945CLMC) Data comparator (IC1: TA75S01F, D2: MA8047) 3 - 1 SECTION 3 DISASSEMBLY INSTRUCTIONS Removing the top cover and shield covers q Unscrew 8 screws, A. w Unplug the connectors B and C from the LOGIC unit. e Remove the top cover in the direction of the arrow. r Remove the shield co

40、vers D and E* in the direction of the arrow. Removing the LOGIC unit, MAIN-A unit and MAIN-B* unit q Unscrew nut F*, G. w Unscrew 6 screws H from the LOGIC unit and remove the LOGIC plate. e Unscrew 6 screws I from the MAIN-A unit and 6 screws J* from the MAIN-B unit*. r Remove the units in the dire

41、ction of the arrows. Top cover A B C D E LOGIC Unit A * F G Chassis LOGIC UNIT LOGIC Plate * * MAIN-A UNIT MAIN-B UNIT H I J * IC-R2500 only * IC-R2500 only 3 - 2 CONTROL unit disassembly (R1500) q Remove 2 knobs A. w Unscrew 2 screws B, and remove the cover. e Unscrew 2 screws C, and remove the LCD

42、 plate. r Remove the CONTROL unit. CONTROL unit disassembly (R2500) q Remove 6 knobs A. w Unscrew 4 screws B, and remove the cover. e Remove the plate C, and remove CONTROL unit. ? ? CONTROL UNIT ? ? ? CONTROL UNIT ? ? SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVE CIRCUITS 4-1-1RF CIRCUITS (MAIN-A/-B UN

43、ITS) The MAIN-A UNIT has eight RF circuits and one down converter circuit to provide wide receiving range. The received signals from the antenna connector (CHASSIS; J1) are applied to RF circuits or down converter circuit according to the received frequency, and amplified within the frequency covera

44、ge. IC-R2500 contains MAIN-B UNIT which has 4 RF circuits to provide dulalwatch or diversity capability . The 0.0150 MHz signals from the antenna are passed through the attenuator (D1, D3), band switch (D9) and low- pass fi lter (LPF; L20, L26, C54, C60, C68, C72, C81, C88), then applied to one of t

45、he RF circuit. 0.011.8 MHz* The 0.011.8 MHz signals are passed through the band switch (D29), LPF (L48, L52, C134, C148, C171, C173) and another band switch (D56), then applied to the 1st mixer (IC14, pins 4, 5). The 501300 MHz signals from the antenna are passed through the anttenuator (D1, D3), ba

46、nd switch (D7) and LPF (L5, C33, C34), then applied to one of the RF circuit. 50150 MHz The received signals 50150 MHz are passed through the band switch (D5) and the tunable bandpass fi lter (BPF; D8, D16D18, D28, D31, L9, L21, L25, L31, L33, C39, C41, C44, C49, C70), and then applied to the RF amp

47、lifi er (Q15). The amplified signals are passed through another tunable BPF (D35, D36, L53, L62, L69, L73, C142, C154, C199) and another band switch (D44), and then applied to the 1st mixer (IC14, pins 4, 5). 4 - 1 D29 LPFFrom the LPF D56 1.815.0 MHz* The 1.815.0 MHz signals are passed through the b

48、and switch (D25), LPF (L43, L47, L50, C102, C120, C125, C131, C135, C140), high-pass filter (HPF; L57, L60, L72, C150, C161, C163, C174, C178, C618, C619) and another band switch (D49), and then applied to the RF amplifier (Q22). The amplified signals are then applied to the 1st mixer (IC14, pins 4,

49、 5) via the band switch (D102). LPFHPFFrom the LPF To the 1st mixer (IC14, pins 4, 5) D25D49D102Q22 RF amp. 15.030 MHz* The 15.030 MHz signals are passed through the band switch (D82), LPF (L46, L49, C116, C118, C124, C130, C136), HPF (L55, L58, C139, C149, C151, C162, C164) and another band switch (D83), and then applied to the RF amplifi er (Q22). The amplifi ed signals are then applied to the 1st mixer (IC14, pins 4, 5) via the band switch (D102). From the LPF To the 1st mixer (IC14, pin