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1、SERVICE MANUAL DIGITAL TRANSCEIVER S-14120IZ-C1 May. 2005 INTRODUCTION REPAIR NOTES This service manual describes the latest service information for the ID-1 DIGITAL TRANSCEIVER at the time of publication. DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more th
2、an 16 V. Such a connection could cause a fire or electric hazard. DO NOT expose the transceiver to rain, snow or any liquids. DO NOT reverse the polarities of the power supply when connecting the transceiver. DO NOT apply an RF signal of more than 20 dBm (100 mW) to the antenna connector. This could
3、 damage the trans- ceivers 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 2710000590 Fan MF40D-12H-001 ID-1 Chassis 2 pieces
4、 8900010940 Cable OPC-1119 RC-24 Chassis 3 pieces Addresses are provided on the inside back cover for your convenience. 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 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 transceiver is defective. 6. DO NOT transmit power into a signal generator or
6、 a sweep generator. 7. ALWAYS connect a 30 dB to 40 dB attenuator between the transceiver and a deviation meter or spectrum analyzer when using such test equipment. 8. READ the instructions of test equipment thoroughly before connecting equipment to the transceiver. To upgrade quality, all electrica
7、l or mechanical parts and internal circuits are subject to change without notice or obligation. MODELVERSIONSYMBOLRC-24 ID-1 U.S.A. USA-2Optional USA-3Supplied Europe EUR-2Optional EUR-3Supplied General GEN-2Optional GEN-3Supplied Icom, Icom Inc. and logo are registered trademarks of Icom Incorporat
8、ed (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries. TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS 2-1 ID-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9、 . . . . . . . . . . . 2-1 SECTION 3 DISASSEMBLY INSTRUCTIONS 3-1 ID-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3-2 RC-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 SECTION 4 CIRCUIT DESCRIPITON 4-1 RECEIVER CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-2 TRNSMITTER CIRCUITS . . . . . . . . . . . . . . . . . . . . . .
11、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 4-3 PLL CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 4-4 POWER SUPPLY CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12、 . . . . . . . . . . . . . . . . . . 4-6 4-5 PORT ALLOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13、 . . . . . . . . . . . . . . . . . . . . . . . . 5-1 5-2 PLL AND CODEC ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 5-3 TRANSMITTER ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14、. 5-6 5-4 RECEIVER ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7 SECTION 6 PARTS LIST SECTION 7 SEMI-CONDUCTOR INFORMATION SECTION 8 MECHANICAL PARTS AND DISASSEMBLY 8-1 ID-1 . . . . . . . . . . . . . . . . . . . . . . . . . .
15、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 8-2 RC-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2 SECTION 9 BOARD LAYOUTS 9-1 MAIN UNIT . . . . . . . . . .
16、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 9-2 LOGIC-1 UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3 9-3 RC-24. . . . . . . . . . . . . . . . .
17、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5 SECTION 10 BLOCK DIAGRAM 10-1 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 10-2 LOGIC-1 UNIT.
18、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2 10-3 RC-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2 SECTION 11 VOLTAGE D
19、IAGRAM 11-1 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1 11-2 LOGIC-1 UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4
20、 11-3 RC-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-6 GENERAL Frequency coverage : 1240.0001300.000 MHz Type of emission : FM, GMSK (Digital) Transmission speed (theoretical value) : Data 128 kbps Dig
21、ital voice 4.8 kbps Codec : AMBE (2.4 kbps) Number of memory channel : 105 (incl. 2 scan edges and 3 calls) Tuning steps : 5, 6.25, 10, 12.5, 20, 25, 50, 100 kHz Frequency stability : 2.5 ppm (10C to +60C) Operating temperature range : 10C to +60C (22F to +140F) Antenna connector : Type-N (50 ) Powe
22、r supply requirement : 13.8 V DC 15% (Negative ground) Current drain (at 13.8 V DC) : Transmit Less than 7 A (at 10 W) Receive Less than 1.5 A (AF max.) Dimensions (projections not included) : Main unit 141(W)40(H)165.8(D) mm; 5916(W)1916(H)61732(D) in Remote controller (RC-24) 150(W)50(H)49.5(D) mm
23、; 52932(W)13132(H)61516(D) in Weight (Approx.) : Main unit 1.2 kg; 2 lb 10 oz Remote controller (RC-24) 220 g; 7.7 oz TRANSMITTER Output power (at 13.8 V DC) : 10/1 W Modulation : Variable reactance frequency modulation (FM) Quadrature modulation (Digital) Maximum frequency deviation (FM) : 5.0 kHz
24、Spurious emissions : Less than 50 dB Microphone connector : 8-pin modular jack (600 ) RECEIVER Receive system : Triple conversion superheterodyne system (FM, DV) Double conversion superheterodyne (DD) Intermediate frequencies : 1st IF: 243.95 MHz, 2nd IF: 31.05 kHz, 3rd IF: 450 kHz (FM, DV) 1st IF:
25、243.95 MHz, 2nd IF: 10.7 MHz (DD) Sensitivity : Less than 0.18 V (122 dBm) at 12 dB SINAD (FM) Less than 0.35 V (116 dBm) at BER 1102 (DV) Less than 1.58 V (103 dBm) at BER 1102 (DD) Selectivity (typical) : More than 12 kHz/6dB, Less than 30 kHz/60 dB (FM) More than 6 kHz/6dB, Less than 18 kHz/50 dB
26、 (DV) More than 140 kHz/6dB, Less than 520 kHz/40 dB (DD) Spurious and image rejection : More than 50 dB Audio output power (at 13.8 V DC) : 2.0 W at 10% distortion with an 8 load Squelch sensitivity (at threshold) : Less than 0.18 V (122 dBm) (FM only) Ext. speaker connector : 2-conductor 3.5 (d) m
27、m/(18)/8 All stated specifi cations are subject to change without notice or obligation. S SECTION 1 SPECIFICATIONS 1 - 1 SECTION 2 INSIDE VIEWS 2 - 1 (IC271: MC3356) (IC1160: RA18H1213G1) (IC1250: TA75501F) MSK receiver IC DD mode Power amplifier* APC amplifier* *: Located under side of this point (
28、FI193: CFWLA450KHFA) 3rd IF filter DV mode (X400: CR662) (IC1551: LA4425) PLL reference oscillator (FI192: CFWLB450KEIY) 3rd IF filter FM mode AF power amplifier 1st VCO circuit 2nd VCO circuit (Q1: NE34018) RF amplifier (IC191: TA33136) Demodulator IC DV mode, FM mode MAIN UNIT Top view LOGIC-1 UNI
29、T Top view CPU (IC50: PD70F3102A) +5V regulator (IC500: TA7805) AMBE CODEC IC (IC2: AMBE2020) Ethernet controller (IC104: RTL8019) Liner CODEC IC (IC1: PD9930) SECTION 3 DISASSEMBLY INSTRUCTIONS 3 - 1 ? ? ? ? ? ? ? L O G IC -1 u n it ? ? ? ? ? ? REMOVING THE MAIN UNIT 1 Unsolder 5 points A, and remo
30、ve the ANT plate B. 3-1 ID-1 REMOVING THE LOGIC-1 UNIT 1 Unscrew 1 screw A, and remove the cover B. 2 Remove 2 main shield plates C. 3 Disconnect 2 cables D, and unsolder 1 point E. 4 Unscrew 4 screws F, and remove the earth spring G. 5 Take off the LOGIC-1 unit. 2 Unsolder 11 points C. 3 Unscrew 2
31、screws D, and remove the ANT connector E. 4 Take off the cable F from the chassis. 5 Disconnect the cable G, and remove the TR-A clip H. 6 Unscrew 7 screws I, and take off the MAIN unit. MAIN unit ? ? ? ? ? ? ? ? ? 3-2 RC-24 REMOVING THE FRONT UNIT 1 Unscrew 4 screws A, and remove the rear plate B.
32、2 Unscrew 3 screws C, and remove the front panel D. 3 Disconnect the cable E, and remove the knob F. 4 Unscrew 5 screws G, and take off the FRONT unit. D E G C F C FRONT unit G B A A Continue to right above. 4 - 1 SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS 4-1-1 ANTENNA SWITCHING CIRCUIT (M
33、AIN UNIT) The antenna switching circuit functions as a low-pass filter while receiving and a resonator circuit while transmitting. This circuit does not allow transmit signals to enter the receiver circuits. Received signals from the antenna connector (CHASSIS; J1) are passed through the low-pass fi
34、lter which contains strip-line and C1198, and are then applied to the 4 type antenna switching circuit (D1160D1162, L1162). While receiving, no voltage is applied to D1160D1162. Thus, the receive line and ground are disconnected and received signals are applied to the RF circuit. 4-1-2 RF CIRCUIT (M
35、AIN UNIT) The RF circuit amplifies signals within the range of frequen- cy coverage and filters out-of-band signals. The signals from the antenna switching circuit pass through the high-pass filter (L1L4, C2C5) and then applied to the RF amplifier (Q1). The amplifi ed signals are passed through the
36、bandpass fi lter (FI1) and then applied to the another RF amplifi er (Q2). The amplifi ed signals are passed through the another bandpass fi lter (FI2) to suppress unwanted signals. The fi ltered signal is applied to the 1st mixer circuit. 4-1-3 1ST MIXER AND 1ST IF CIRCUITS (MAIN UNIT) The 1st mixe
37、r circuit converts the received signals into fixed frequency of the 1st IF signal with the 1st LO signal. By changing the 1st LO signal, only the desired frequency passes through the bandpass filter at the next stage of the 1st mixer circuit. The RF signals from the bandpass filter (FI2) are mixed w
38、ith the 1st LO signal, where come from the 1st VCO cir- cuit, at the 1st mixer circuit (IC71) to produce a 243.95 MHz 1st IF signal. The 1st IF signal is passed through the bandpass filter (FI71) to suppress unwanted signals and pass only the desired signals. The filtered signal is applied to the 2n
39、d IF circuit. 4-1-4 2ND MIXER AND 2ND IF CIRCUITS (MAIN UNIT) The 2nd mixer circuit converts the 1st IF signal into the 2nd IF signal with the 2nd LO signal. DV/FM MODE The filtered 1st IF signal from the bandpass filter (FI71) is mixed with the 2nd LO signal (275.00 MHz), where come from 2nd VCO ci
40、rcuit, at the 2nd mixer circuit (Q131) to produce the 2nd IF signal (31.05 MHz). The 2nd IF signal is passed through the MCF (FI191) via the DV/FM switch (D131). The filtered signal is applied to the IF amplifier (Q191) and then applied to the 3rd mixer circuit in the demodulator IC (IC191). DD MODE
41、 The filtered 1st IF signal from the bandpass filter (FI71) is mixed with the 2nd LO signal (233.25 MHz), where come from the 2nd VCO circuit, at the 2nd mixer circuit (Q131) to produce the 2nd IF signal (10.7 MHz). The 2nd IF signal is passed through the bandpass filter (FI272) to remove unwanted h
42、eterodyned frequencies via the DD switch (D273). The filtered signal is amplified at the IF amplifier (Q270) and then passed through the another bandpass filter (FI273). The filtered signal is applied to the another IF amplifier (Q271) and then applied to the MSK receiver IC (IC271). FI2 FI1Q1Q2 124
43、01300 MHz 1st mixer IC71 1st LO: 3rd LO: 30.6 MHz AF amplifier circuit LOGIC-1 unit 1056.051016.05 MHz 2nd IF: 31.05 MHz 2nd IF: 10.7 MHz Fl71 BPFAMPAMP 1st IF: 243.95 MHz 2nd mixer Q131 2nd LO: DV, FM: 275.00 MHz DD: 233.25 MHz HPF BPF BPF FI272FI273Q271Q270 AMP AMP BPF BPF FI191 D131 D273 DD mode
44、DV, FM mode IC191 IC271 Q191 AMPBPF Demodulator IC MSK receiver RF AND IF CIRCUITS 4 - 2 4-1-5 DEMODULATOR CIRCUITS (MAIN UNIT) DV MODE The demodulator IC (IC191) contains the 3rd mixer, limiter amplifier, quadrature detector, active filter and noise ampli- fier, etc. The amplified signal from the I
45、F amplifier (Q191) is applied to the 3rd mixer section of the demodulator IC (IC191, pin 16) and is then mixed with the 3rd LO signal to be converted into the 450 kHz 3rd IF signal. The 3rd IF signal from the 3rd mixer section (IC191, pin 3) passes through the ceramic filter (FI193) via the mode swi
46、tches (D192, D193) to remove unwanted heterodyned frequencies. The filtered signal is amplified at the limiter amplifier section (IC191, pin 5) and then applied to the quadrature detector section (IC191, pins 10, 11) to demodulate the digital audio signals. The 3rd LO signal (30.6 MHz) is produced a
47、t the 1st PLL circuit by doubling its reference frequency (X400: 15.3 MHz) at the doubler (Q550). The digital audio signals from the demodulator IC (IC191, pin 9) are amplified at IC343 (pins 6, 7) and then applied to the mode switch (IC342, pins 1, 7). The switched signals from the mode switch (IC3
48、42, pin 1) are applied to the LOGIC-1 unit via J1801 (pin 20). DD MODE The MSK receiver IC (IC271) contains the limiter amplifier, quadrature detector, etc. The amplified signal from the IF amplifier (Q271) is applied to the limiter amplifier section of the MSK receiver IC (IC271, pin 7) and then ap
49、plied to the quadrature detector section (IC271, pin 11) to demodulate to the data signals. The demodulated data signals from the MSK receiver IC (IC271, pin 13) are amplified at IC343 (pins 1, 2) and then applied to the mode switch (IC342, pins 1, 6). The switched signals from the mode switch (IC342, pin 1) are applied to the LOGIC-1 unit via J1801 (pin 20). FM MODE The same demodulator IC that is used for DV mode opera- tion is used for FM demodulation. The
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