IC-PCR1500_IC-PCR2500_serv.pdf

《IC-PCR1500_IC-PCR2500_serv.pdf》由会员分享，可在线阅读，更多相关《IC-PCR1500_IC-PCR2500_serv.pdf（66页珍藏版）》请在收音机爱好者资料库上搜索。

1、? ? iC-pcr1500 iC-pcr2500 S-14222MZ-C1 Jun. 2006 COMMUNICATIONS RECEIVERS This service manual describes the latest service information for the IC-PCR1500 and IC-PCR2500 COMMUNICATIONS RECEIVERS at the time of publication. Be sure to include the following four points when ordering replacement parts:

2、1. 10-digit Icom parts numbers 2. Component name and informations 3. Equipment model name and unit name 4. Quantity required 1110001811 S.IC TA7S04F IC-PCR2500 Main-A unit 5 pieces 8810008960 Screw FH M2.6 IC-PCR2500 Chassis 8 pieces Addresses are provided on the inside back cover for your convenien

3、ce. NEVER connect 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.

4、 DO NOT apply 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

5、any of the variable 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 b

6、efore connecting 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, Germa

7、ny, France, Spain, Russia and/or other countries. INTRODUCTIONCAUTION ORDERING PARTSREPAIR NOTES MODELVERSIONSYMBOL IC-PCR1500 IC-PCR2500 EuropeEUR-1 U.K.UK-1 U.S.A.USA-1 CanadaCAN-1 FranceFRA-1 South East AsiaSEA-1 Export EXP-2 EXP-3 IC-PCR2500*U.S.A.USA-3 *UT-122 is already installed as DIGITAL UN

8、IT. (IC-PCR2500) TABLE 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 CIRCUIT

9、S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 (PCR2500 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13、 9-1 9-2 MAIN-A UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3 9-3 MAIN-B UNIT (PCR2500 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5 9-4 UT-122 (Optio

14、nal product; DIGITAL UNIT for PCR2500; USA-3) . . . . . . . . . . . . . . . . . . . . . . 9-7 SECTION 10 BLOCK DIAGRAM SECTION 11 VOLTAGE DIAGRAM 1 - 1 SECTION 1 SPECIFICATIONS M GENERAL Frequency coverage * 999999.908000010.0 : ,1 *2 999999.668000.158 000000.0031000.698 999999.0181100000.0031 * 999

15、999.7681000.2581 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 Mode:FM, AM, WFM, USB*1, LSB*1, CW, DV*1,*2, P25*1,*3 *1 : For PCR2500. Available on Main band only. *2 : For PCR2500. Availa

16、ble when optional UT-118 is installed. *3 : For PCR2500. 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,

17、25 kHz, 30 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 Frequency stability:3 ppm (10C to +60C) Power supply requirement:12 V DC 15% (Negative ground) * 999999.92000010.0 : ,1 *2 000002.15002.05 999999.701005.7

18、8 00000.641000.441 00000.044000.034 00000.0031000.0421 * 999999.9923010.0 : ,1 *2 ) l ac i py t (Am 056 y bdnatS :NO r ewoP A 2.1 naht sseLo i dua . xaM ) l ac i py t (Am 055 ) NO-SABV BSU( CP : FFO rewoP ) l ac i py t (Am 51 )FFO-SABV BSU( CP Current drain (At 12 V DC ; approx.) Dimensions (project

19、ions not included):146(W)41(H)206(D) mm; 534(W)158(H)818(D) in Weight (approx.):1.2 kg; 2 lb 10 oz (PCR1500) 1.35 kg; 2 lb 15 oz (PCR2500) Antenna connector:BNC (50 ) ) l ac i py t (Am 056 y bdnatS :no i tarepo dnab e l gn i s A 2.1 naht sseLo i dua . xaM ) l ac i py t (Am 058 y bdnatS : no i tarepo

20、 hc tawl auD A 5.1 naht sseLo i dua . xaM ) l ac i py t (Am 055)NO SABV BSU( CP :FFO r ewoP ) l ac i py t (Am 51 ) FFO SABV BSU( CP * *: PCR2500 only. *1:. y l no y l no dnab n i aM no e l ba l i avA . 0052RCP-CI roF . z HM 000000.0031 o t 05 ;egnar ycneuqer f revocs dnab buS *2:y l no egnar zHM000.

21、0003594.0 :deetnarauG .A.S.U ecnarF evoba naht rehtO PCR1500 PCR2500 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 s

22、seL:zHM999.92000.82 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 Bd

23、01 ; .DOM %03/ 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

24、.94000.51 V4.0 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 ( B

25、d 6/ zHk 8.2 naht 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.

26、speaker connector: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 TO

27、P VIEW BOTTOM VIEW +33V regulator IC2: BA6161F D2: 1SS355 VSC/TONE filter (IC2021: LM2904) IC-PCR2500 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: DTC

28、144EU 5V regulator IC8: PC1553 D6: 1SS272 D8: MA8051 VSC/TONE filter (IC21: LM0904) AF selecter (IC23: SN74AHC2053) AF selecter (IC2023: SN74AHC2053) IC-PCR2500 only USB audio IC (IC16: PCM2901M) Electric VR (IC17: SM6451B) AF amplifier (Q18: 2SC4617) AF amplifier (Q2018: 2SC4617) IC-PCR2500 only CP

29、U5V regulator (IC3: XC6202P502PR) 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-PCR2500 only B+8V regulator (I

30、C2007: TA7708SP) IC-PCR2500 only Clock oscillator (X2: CR-818 4.19304 MHz) () () () () Down converter circuits 1st VCO circuits 2nd VCO circuits DDS circuits RF circuits MAIN-A UNIT Noise blanker amplifier (Q68: 2SK882) APCO5V regulator (Q77: 2SA1832) Buffer (Q60: 2SC4617) AM detecter circuits WFM I

31、F IC (IC16: LA1145M) NFM, FM, IF IC (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:

32、UNR9111) DPLL 3.3V regulator (IC2: 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 (Q2

33、2: 2SC5226) PLL 3.3V regulator (IC9: S-812C33AMC) 2 - 2 MAIN-B UNIT (IC-PCR2500 only) UT-122 (Optinal product; DIGTAL UNIT for IC-PCR2500: USA-3) Noise blanker (Q68: 2SK882) BAPCO5V regulator (Q77: 2SA1832) 3rd IF filter (FI1: CFWKA450) Buffer (Q60: 2SC4617) AM detecter circuits WFM IF IC (IC16: LA1

34、145M) NFM, FM, IF IC (IC24: TA31136) 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) ATT circuits HF filter circuits 1st VCO circuits 2st VCO circuits TOP VIEWBOTTOM VIEW TOP V

35、IEWBOTTOM VIEW RSSI meter amplifier (IC25: NJM2904V 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 3 - 1 SECTION 3 DISASSEMBLY INSTRUCTIONS Removing the top cover and shield cover

36、s 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 covers 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

37、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 direction 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-PCR2500 only *

38、IC-PCR2500 only SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVE CIRCUITS 4-1-1RF CIRCUITS (MAIN-A/-B UNITS) 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

39、 converter circuit according to the received frequency, and amplified within the frequency coverage. IC-PCR2500 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

40、 (D9) and low- pass fi lter (LPF; L20, L26, C54, C60, C68, C72, C81, C88), then applied to one of the 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,

41、pins 4, 5). The 501300 MHz signals from the antenna are passed through the anttenuator (D1, D3), band 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,

42、 D16D18, D28, D31, L9, L21, L25, L31, L33, C39, C41, C44, C49, C70), and then applied to the RF amplifi 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

43、 4, 5). 4 - 1 D29 LPFFrom the LPF D56 1.815.0 MHz* The 1.815.0 MHz signals are passed through the band 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 applie

44、d to the RF amplifier (Q22). The amplified signals are then applied to the 1st mixer (IC14, pins 4, 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, C

45、116, 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, pins 4, 5

46、) LPFHPF D82D83D102 Q22 RF amp. 3050 MHz* The 3050 MHz signals are passed through the band switch (D30), HPF (L77, L82, C201, C206, C208, C213, C216) and another band switch (D48), and then applied to the RF amplifi er (Q22). The amplifi ed signals are then applied to the 1st mixer (IC14, pins 4, 5)

47、 via the band switch (D102). From the LPF To the 1st mixer (IC14, pins 4, 5) HPF D30D48 Q22 RF amp. D102 D8, D16D18 D28, D31 BPF D35, D36 BPFFrom the HPF To the 1st mixer (IC14, pins 4, 5) D5 Q15 RF amp. D44 150350 MHz The received signals 150350 MHz are passed through the band switch (D6) and BPF (

48、D32, L10, L12, L34, L37, L39, C40, C42, C45, C50, C82, C114, C117), and applied to the RF amplifier (Q17). The amplified signals are passed through another BPF (D37, L56, L67, L71, C155, C167, C183, C195) and another band switch (D46), and then applied to the 1st mixer (IC14, pins 4, 5). D32 BPF D37

49、 BPFFrom the HPF To the 1st mixer (IC14, pins 4, 5) D6 Q17 RF amp. D46 350700 MHz The received signals 350700 MHz are passed through the band switch (D14) and BPF (D26, D27, L24, L32, L40, C65, C71, C81, C106), then applied to the RF amplifier (Q16). The amplifi ed signals are passed through another BPF (D38, D39, L54, L64, L74, L78, C144, C172, C211) and another band switch (D47), and then applied to the 1st mixer (IC14, pins 4, 5). D26, D27 BPF D38, D39 BPFFrom the HPF To t