IC-E90_serv.pdf

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1、S-13903MZ-C2 2002 Icom Inc.1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan MULTIBAND FM TRANSCEIVER ie90 ic-e90 IC-E90 (1,4) INTRODUCTION This service manual describes the latest service information for the IC-E90 MULTIBAND FM TRANSCEIVER at the time of publication. E90 MODELVERSIONSYMBOL Europ

2、e Europe-1 United Kingdom Italy Spain France EUR EUR-1 UK ITR ESP FRA To upgrade quality, all electrical or mechanical parts and inter- nal circuits are subject to change without notice or obligation. DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 12

3、 V. Such a connection could cause a fire hazard and/or electric. DO NOT expose the transceiver to rain, snow or any liquids. DO NOT reverse the polarities of the power supply when connecting the tranceiver. DO NOT apply an RF signal of more than 20 dBm (100 mW) to the antenna connector. This could d

4、amage the transceiver s front end. ORDERING PARTS 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 1130006220S.IC TC4W53FUIC-E90LOGIC UNIT1 piece 893005

5、42902372 Main sealIC-E90Chassis5 pieces Addresses are provided on the inside back cover for your convenience. REPAIR NOTES 1. Make sure a problem is internal before disassembling the transceiver. 2. DO NOT open the transceiver until the transceiver is disconnected from its power source. 3. DO NOT fo

6、rce any of the variable components. Turn them slowly and smoothly. 4. DO NOT short any circuits or electronic parts. An insulated tuning tool MUST be used for all adjustments. 5. DO NOT keep power ON for a long time when the transceiver is defective. 6. DO NOT transmit power into a signal generator

7、or a sweep generator. 7. ALWAYS connect a 40 dB or 50 dB attenuator between the transceiver and a deviation meter or spectrum analyser when using such test equipment. 8. READ the instructions of test equipment thoroughly before connecting equipment to the transceiver. IC-E90 (2,3) TABLE OF CONTENTS

8、SECTION 1 SPECIFICATIONS SECTION 2INSIDE VIEWS SECTION3 DISASSEMBLY INSTRUCTIONS SECTION 4CIRCUIT DESCRIPTION 4 - 1 RECEIVER CIRCUITS . 4 - 1 4 - 2 TRANSMITTER CIRCUITS . 4 - 4 4 - 3 PLL CIRCUITS. 4 - 5 4 - 4 POWER SUPPLY CIRCUITS . 4 - 7 4 - 5 PORT ALLOCATIONS. 4 - 7 SECTION 5ADJUSTMENT PROCEDURES

9、5 - 1 PREPARATION. 5 - 1 5 - 2 TRIMMER ADJUSTMENT. 5 - 3 5 - 3 ADJUSTMENT MODE ADJUSTMENTS . 5 - 5 SECTION 6PARTS LIST SECTION 7 MECHANICAL PARTS AND DISASSEMBLY SECTION 8SEMI-CONDUCTOR INFORMATION SECTION 9 BOARD LAYOUTS 9 - 1 LOGIC UNIT . 9 - 1 9 - 2 RF UNIT. 9 - 3 9 - 3 AF UNIT / VCO UNIT . 9 - 5

10、 SECTION 10 BLOCK DIAGRAM SECTION 11 VOLTAGE DIAGRAM 1 - 1 MGENERAL Frequency range:(Unit: MHz) Mode: FM, AM (RX only) and WFM (Rx only) Number of memory channels: 555 (incl. 50 scan edges and 5 call channels) Frequency stability: 6 ppm max. (10C to +60C; 14F to 140F) Tuning steps: 5, 6.25, 8.33, 9,

11、 10, 12.5, 15, 20, 25, 30, 50 100, and 200 kHz Usable tempareture range: 10C to +60C; 14F to 140F Power supply requirement: 5.5 11 V DC or specified battery pack Usable battery pack/case: BP-217 (7.4 V) and BP-216 (3.2 V) Polarity: Negative ground Current drain (at 8.0 V DC) : (typical value) * 1Pow

12、er save duty is 1:4. Anntena connector: SMA (50 ) Dimensions (projections not included): 58(W) 87(H) 29(D) mm;21732(W) 3716(H) 1532(D) in Weight (with BP-217/Ant.): 280 g; 978oz MTRANSMITTER Output power (at 8.0 V DC): High5.0 W typical Low0.5 W typical Modulation system:Variable reactance modulatio

13、n Max. freq. deviation: 5 kHz Spurious Emissions: Less than 60 dB External MIC connector: 3-conductor 2.5(d) mm (18”); 2 k SECTION 1SPECIFICATIONS 440 MHz 2.0 A 1.2 A RX High power Low power Rated output Standby Power saved* 1 50/145 MHz 2.0 A 0.8 A 220 mA 100 mA 65 mA Version EUR UK ITR ESP EUR-1 F

14、RA 50 MHz 50 52 50 51 50.2 51.2 145 MHz 144 148 440 MHz 430 440 430 434 435 438 430 440 Receiving 0.495999.990 50.00052.000, 144.000146.000, 430.000440.000 0.49529.995, 50.00052.000, 76.000135.995, 144.000146.000, 430.000440.000 TX 1 - 2 All stated specifications are subject to change without notice

15、 or obligation. MRECEIVER Receiver system: Double-conversion superheterodyne Intermediate frequency : 1st13.350 MHz (FM/AM) 13.350 MHz (WFM) 2nd450 kHz Sensitivity* 1: (except spurious points; typical values) * 1 FM and WFM are measured at 12 dB SINAD, AM is mea- sured at 10 dB S/N. * 2 The frequenc

16、y range is between 222.000 MHz and 229.995 MHz. * 3 The frequency range is between 320.000 MHz and 329.995 MHz. * 4 The frequency range is between 40.000 MHz and 108.000 MHz. Selectivity AM and FM: Less than 15 kHz/9 dB More than 30 kHz/60 dB WFM: Less than 350 kHz/3 dB More than 700 kHz/20 dB Spuri

17、ous and image rejection ratio : 50 MHzMore than 60 dB IF/2: More than 50 dB IF: More than 40 dB 145 MHzMore than 60 dB IF/2: More than 50 dB 440 MHzMore than 50 dB IF: More than 60 dB Audio output power: 200 mW typical at 10 % distor- tion with an 8 load AF output impedance: 8 Squelch sensitivity* 1

18、: (typical; Except sprious points) * 1 FM and WFM are measured at 12 dB SINAD, AM is mea- sured at 10 dB S/N. * 2 The frequency range is between 222.000 MHz and 229.995 MHz. * 3 The frequency range is between 320.000 MHz and 330.000 MHz. * 4 The frequency range is between 40.000 MHz and 108.000 MHz.

19、 Frequency (MHz) 0.4951.625 1.6254.995 5.00029.995 29.99549.995 50.00054.000 54.00576.000 76.000108.000 108.000118.000 118.000136.000 136.000143.995 144.000148.000 148.005175.000 175.000221.995 222.000225.000 225.005246.995 247.000329.995 329.995429.995 430.000450.000 450.005470.000 470.000770.000 7

20、70.000832.995 833.000999.990 FM 0.4 V 0.18 V 0.16 V 0.18 V 0.16 V 0.4 V 0.32 V 0.4 V 0.32 V 0.16 V 0.32 V 1.0 V AM 1.3 V 0.56 V 0.5 V 0.79 V* 2 1.0 V* 3 WFM 1.0 V* 4 1.8 V 3.2 V Frequency (MHz) 0.4951.625 1.6254.995 5.00029.995 29.99549.995 50.00054.000 54.00576.000 76.000108.000 108.000118.000 118.

21、000136.000 136.000143.995 144.000148.000 148.005175.000 175.000221.995 222.000225.000 225.005246.995 247.000329.995 329.995429.995 430.000450.000 450.005470.000 470.000770.000 770.000832.995 833.0001319.995 FM 0.4 V 0.18 V 0.16 V 0.18 V 0.16 V 0.4 V 0.32 V 0.4 V 0.32 V 0.16 V 0.32 V 1.0 V AM 1.3 V 0

22、.56 V 0.5 V 0.79 V* 2 1.0 V* 3 WFM 1.0 V* 4 1.8 V 3.2 V 2 - 1 SECTION 2INSIDE VIEWS EEPROM (IC2: HN58X24128FPI, Q2: UN9115) RESET IC (IC142: S-80928CNMC) Crystal oscillator for CPU clock (X1: CR-687, 6.7584 MHz, Q40: UN9215) CPU (IC1: M30220MA-114RP) AF regulator (Q201: 2SB1201, Q202: XP1501) +3 reg

23、ulator (Q8: 2SB1132, Q9: XP1501) +3C regulator (Q142: XP1501, Q145: 2SB1132, D143: MA2S111) CPU3 regulator (IC141: NJM2370U32) 440 MHz band modulation switch (Q304: 2SJ364) Microphone mute (Q310: XP6501) Microphone amplifier (Q311: XP5601, Q312: XP6501) 145 MHz band modulation switch (Q305: 2SJ364)

24、50 MHz band modulation switch (Q342: 2SJ364) LOGIC UNIT Top view LOGIC UNIT Bottom view 2 - 2 50 MHz TX low-pass filter circuit 144 MHz TX high-pass filter circuit Pre-drive (Q54: 2SC5289) Drive amplifier (Q52: 2SK3475) 0.49529.995 MHz RF amplifier (Q302: 2SC5006) 75.995229.995 MHz RF amplifier (Q35

25、1: 3SK320) R3 regulator (Q353: XP4312) 29.99575.995 MHz RF amplifier (Q303: 2SC5006) 629.995999.90 MHz RF amplifier (Q452: 2SK3475) T3 regulator (Q56: XP4315, D50: MA6S121) 1st mixer (IC351: PC2757TB) VCO circuit Power amplifier (Q51: 2SK3476) FM IF IC (IC151: TA31136FN) 1st AF amplifier (Q205: 2SD2

26、216) AF mute (Q251: 2SJ364) IF amplifier (Q102: 2SC4403) T5V regulator (Q11: XP1501, Q55: 2SB1132) Crystal oscillator (X1: VR-583, 13.800 MHz) AF power amplifier (IC252: TA7368F) AM/FM switch (Q206: XP4315) R3V regulator Q208: 2SA1576 Q209: XP1501 AM detector (Q201, Q202: XP6501) AF UNIT Top view RF

27、 UNIT Top view AF UNIT Bottom view AF UNIT Bottom view RF UNIT Bottom view 3 - 1 SECTION 3DISASSEMBLY INSTRUCTIONS 1. Removing the rear panel 2. Removing the LOGIC unit 3. Removing the AF unit 4. Removing the RF unit q Unscrew 1 screw A (M2 4 mm, black). w Unscrew 2 screws B (M2 20 mm, black), and 4

28、 screws C (M2 6 mm, black) from the rear panel. e Take off the rear panel in the direction of the arrow. q Unplug the flexible cable W1 from J1 on the LOGIC unit to separate the rear panel. w Take off the main seal. e Unsolder 2 points D at the speaker lead. r Unscrew 6 screws E (2 4 mm, silver) to

29、separate the LOGIC unit. NOTE: When you tighten 6 screws E, tighten those in turn of 16. q Take off the lock plate. w Unsolder 5 points F at the antenna plate, vol plate and lead. e Unscrew 1 screw G (2 4 mm, silver), and 2 screws H (M2 12 mm, black) from the AF unit. r Take off the AF unit in the d

30、irection of the arrow to sepa- rate the rear panel. q Unsolder 2 points I at the antenna rug plate and anten- na connector. w Unscrew 2 screws J (M2 4 mm, silver) from the FRONT panel. e Take off the RF unit in the direction of the arrow to sepa- rate the rear panel. Rear panel A B C W1 (L) J1 Main

31、seal E E 2 3 4 5 LOGIC unit 1 6 D G J251 Lock plate Rear panel AF unit Vol plate Vol lead Antenna plate F F F H J RF unit Antenna rug Antenna connector Rear panel I SECTION 4CIRCUIT DESCRIPTION 4 - 1 4-1 RECEIVER CIRCUITS 4-1-1 TRIPLEXER CIRCUIT (RF UNIT) The transceiver has a triplexer (low-pass an

32、d bandpass fil- ters) on the first stage from the antenna switching diode to separate the signals. RF signals 0.495 MHz75.995 MHz The 0.495 MHz75.995 MHz RF signals are passed through the low-pass filters (L5, L6, L24, C43, C483C486, L11L13, L17L19, C21, C481, C482) and are applied to the antenna sw

33、itching circuit. RF signals 76.0 MHz299.995 MHz The 76.0 MHz299.995 MHz RF signals are passed through the low-pass (L5, L6, L24, C43, C483C486) and high-pass (L9, C9C11) filters and are applied to the antenna switching circuit. RF signals 230.0 MHz629.995 MHz The 230.0 MHz629.995 MHz RF signals are

34、passed through the high-pass (L1, C1C3) and low-pass (FI1) filters and are applied to the antenna switching circuit. RF signals 630.0 MHz999.990 MHz The 630.0 MHz999.990 MHz RF signals are passed through the high-pass (L3, L4, C6C8) filter and are applied to the RF circuit. 4-1-2 ANTENNA SWITCHING C

35、IRCUIT (RF UNIT) The antenna switching circuit functions as a low-pass filter while receiving. However, its impedance becomes very high while transmitting by applying a current to D4, D6, D9, D12, D13, D19. Thus, tramsmit signals are blocked from the entering the receiver circuits. The antenna switc

36、hing circuit employs a 1/4 type diode switching system. The signals are applied to the each antenna switching circuit. RF signals 0.495 MHz75.995 MHz The signals pass through the antenna switching circuit (D9), and then applied to the RF circuit. RF signals 76.0 MHz299.995 MHz The signals pass throu

37、gh the antenna switching circuit (D8), and then applied to the RF circuit. RF signals 230.0.0 MHz629.995 MHz The signals pass through the antenna switching circuit (D7), and then applied to the RF circuit. 4-1-3 RF CIRCUIT (RF UNIT) The RF circuit amplifies the received signals within the range of f

38、requency coverage and filters out-of-band signals. (1) 0.495 MHz29.995 MHz RF CIRCUIT The signals from the antenna switching circuit pass through the attenuator (D305) and band switch (D301). The signals applied to the bandpass filter (L301, L302, C301C307) to suppress unwanted signals, then amplifi

39、ed at the RF amplifi- er (Q302). (2) 30.0 MHz75.995 MHz RF CIRCUIT The signals from the antenna switching circuit pass through the attenuator (D305) and band switch (D306). The signals applied to the bandpass filter (D307, D308, L303, L304, C317C320) to suppress unwanted signals, then pass through t

40、he bandpass filter (D309, D310, L306, L307, L323C325, C331) after being amplified at the RF amplifier (Q303). ANT LPFLPF ATT CTRL HPF HPF HPF LIMIT LIMIT ANT SW LPF ANT SW ANT SW LIMIT LIMITSW SW 75.995 MHz RF signals 299.995 MHz RF signals 629.995 MHz RF signals 999.990 MHz RF signals 0.495 MHz 76.

41、0 MHz 230.0 MHz 630.0 MHz R3V Q355 Antenna switching circuit Triplexer circuit D305 D351 D401 D451 D6, D9 D4, D19 D12, D13D457 D10 ATT TRIPLEXER AND ANTENNA SWITCHING CIRCUITS 4 - 2 (3) 76.0 MHz229.995 MHz RF CIRCUIT The signals from the antenna switching circuit pass through the attenuator (D351),

42、and then applied to the bandpass fil- ter (D352, D353, L351, L352) to suppress unwanted signals. The signals pass through the bandpass filter (D354D356, D359, L354, L355, L357, L358, C357C364) after being amplified at the RF amplifier (Q351). (4) 230.0 MHz629.995 MHz RF CIRCUIT The signals from the

43、antenna switching circuit are applied to the band switch (D457), and then pass through the attenua- tor (D401). The signals pass through the bandpass filter (D402, D403, L401, L402, C402, C404C406) to suppress unwanted signals, then applied to the RF amplifier (Q401). The amplified signals pass thro

44、ugh the bandpass filter (D405, D407, L409, C414, C415), and are then amplified at the RF amplifier (Q402). (5) 630.0 MHz999.990 MHz RF CIRCUIT The signals from the antenna pass through the high-pass fil- ter (L3, L4, C6C8), and then applied to the attenuator (D451) after being passed through the ban

45、d switch (D10). The signals pass through the bandpass filter (D452, L451, C451C454), then applied to the RF amplifier (Q451). The amplified signals pass through the bandpass filter (D453, D454, L452, L453, C456, C460, C462C464) and RF ampli- fier (Q452). The amplified or filtered signals pass through one of the band switch (D303, D313, D358, D408, D455), and then applied to the 1st mixer circuit (IC351, pin 1). 4-1-4 1ST MIXER AND 1ST IF CIRCUITS (RF, AF AND VCO UNITS) The 1st mixer circuit converts the received RF signals to a fixed frequency of the 1st IF signal with a PLL ou