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1、S-14523XZ-C1 Mar. 2009 HF/50 MHz TRANSCEIVER This service manual describes the latest technical information for the IC-7600 HF/50 MHz TRANSCEIVER TRANSCEIVER at the time of publication. NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than specified. This will rui
2、n the transceiver. 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 damage the transceivers front-end. To upgrade
3、quality, any electrical or mechanical parts and internal circuits are subject to change without notice or obligation. MODELVERSIONTX OUTPUT POWER IC-7600 USA 100 W EUR EUR-1 ESP KOR TPE CHN ITR FRA EXP Be sure to include the following four points when ordering replacement parts: 1. 10-digit Icom par
4、ts numbers 2. Component name 3. Equipment model name and unit name 4. Quantity required 1130013010 SN74AHC1G08DCK3 IC-7600 LOGIC UNIT 1 piece 8930079060 3073 DC PLATE IC-7600 CHASSIS 2 pieces Addresses are provided on the inside back cover for your convenience. Icom, Icom Inc. and ICOM logo are regi
5、stered trademarks of Icom Incorporated (Japan) in Japan, the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries. ORDERING PARTS 1. Make sure that the problem is internal before disassembling the transceiver. 2. DO NOT open the transceiver until the transceiver i
6、s disconnected from its power source. 3. DO NOT force 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.
7、 6. DO NOT transmit power into a Standard Signal Generator or a Sweep Generator. 7. ALWAYS connect a 50 dB to 60 dB attenuator between the transceiver and a Deviation Meter or Spectrum Analyzer when using such test equipment. 8. READ the instructions of test equipment throughly before connecting a t
8、est equipment to the transceiver. REPAIR NOTES INTRODUCTIONCAUTION TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 CIRCUIT DESCRIPITON 3-1 RECEIVER CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
9、3-2 TRANSMITTER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 3-3 FREQUENCY SYNTHESIZER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 3-4 VOLTAGE BLOCK DIAGRAM . . . . . . . . . . .
10、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8 3-5 CPU PORT ALLOCATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 SECTION 4 ADJUSTMENT PROCEDURES 4-1 PREPARATION . . . . . . . . . . . . . . . . . . .
11、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-2 REFERENCE FREQUENCY SIGNAL LEVEL ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 4-3 PLL UNIT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12、. . . . . . . . . . 4-3 4-4 PA UNIT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 4-5 CTRL UNIT ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 4-6 MAIN
13、ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 4-7 MAIN UNIT (SCOPE) ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13 4-8 RF UNIT ADJUSTMENT . . . . . . . . . . . .
14、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15 4-9 SOFTWARE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17 SECTION 5 PARTS LIST SECTION 6 MECHANICAL PARTS SECTION 7 BOARD LAYOUTS SECTION
15、8 GENERAL WIRING SECTION 9 BLOCK DIAGRAM SECTION 10 VOLTAGE DIAGRAM LOGIC UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 DISPLAY UNIT (Incl. VR-A, VR-B, VR-C, MIC, JACK and RIT BOARDS) . . . . . . . . . . . . .
16、. . . 10-5 MAIN UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8 PLL UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14
17、 RF UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17 TUNER UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-19 FILTER UNI
18、T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-20 CTRL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-21 BPF UNIT. . . . . . .
19、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-24 DCDC UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-24 BPF UNIT. . . . . . . . . . . . .
20、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-24 PREAMP BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-25 PA UNIT. . . . . . . . . . . . . . . . . . . . . .
21、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-25 for free by RadioAmateur.eu 1 - 1 SECTION 1. SPECIFICATIONS ? General Frequency coverage : (unit: MHz) Receive 0.03060.000*1*2 Transmit 1.8001.999*2, 3.5003.999*2, 5.33050*3, 5.34650*3, 5.36650*3, 5.3715
22、0*3, 5.40350*3, 7.0007.300*2, 10.10010.150*2, 14.00014.350*2, 18.06818.168*2, 21.00021.450*2, 24.89024.990*2, 28.00029.700*2, 50.00054.000*2 *1Some frequency bands are not guaranteed. *2Depending on version. *3USA version only. Mode : USB, LSB, CW, RTTY, PSK, AM, FM No. of memory channels : 101 (99
23、regular, 2 scan edges) Antenna connector type : SO-239 2 and phono jack (RCA; 50 impedance) Temperature range : 0C to +50C (+32F to +122F) Frequency stability : Less than 0.5 ppm 5 min. after power ON. (0C to +50C; +32F to +122F) Frequency resolution : 1 Hz Power supply : 13.8 V DC 15% (negative gro
24、und) Power consumption Transmit : Max. power 23 A Receive : Standby 3.0 A Max. audio 3.5 A Dimensions : 340(W) 116(H) 279.3(D) mm (projections not included) 1338(W) 4916(H) 11(D) in Weight (approx.) : 10.0 kg; 22 lb ACC 1 connector : 8-pin DIN connector ACC 2 connector : 7-pin DIN connector CI-V con
25、nector : 2-conductor 3.5 (d) mm (18) Display : 5.8-inch (diagonal) TFT color LCD ? Transmitter Output power (continuously adjustable) SSB/CW/RTTY/FM : Less than 2 to 100 W AM : Less than 1 to 30 W Modulation system SSB : Digital PSN modulation AM : Digital Low power modulation FM : Digital Phase mod
26、ulation Spurious emission HF bands : Less than 50 dB 50 MHz band : Less than 63 dB Carrier suppression : More than 40 dB Unwanted sideband : More than 55 dB suppression TX variable range : 9.999 kHz Microphone connector : 8-pin connector (600 ) ELEC-KEY connector : 3-conductor 6.35(d) mm (14) KEY co
27、nnector : 3-conductor 6.35(d) mm (14) SEND connector : Phono jack (RCA) ALC connector : Phono jack (RCA) ? Receiver Receive system : Double superheterodyne system Intermediate frequencies 1st : 64.455 MHz 2nd : 36 kHz Sensitivity (typical) SSB, CW, RTTY : 0.15 V (1.8029.99 MHz)*1 (10 dB S/N) BW=2.4
28、kHz 0.12 V (50.054.0 MHz)*2 AM (10 dB S/N) : 6.3 V (0.11.799 MHz)*1 BW=6 kHz 2 V (1.8029.99 MHz)*1 1.6 V (50.054.0 MHz)*2 FM (12 dB SINAD) : 0.5 V (28.029.99 MHz)*1 BW=15 kHz 0.3 V (50.054.0 MHz)*2 *1Pre-amp 1 is ON. *2Pre-amp 2 is ON. Squelch sensitivity (Pre-amp: ON) SSB : Less than 3.2 V FM : Les
29、s than 0.3 V Selectivity (IF fi lter shape is set to SHARP.) SSB (BW: 2.4 kHz) : More than 2.4 kHz/6 dB Less than 3.8 kHz/60 dB CW (BW: 500 Hz) : More than 500 Hz/6 dB Less than 900 Hz/60 dB RTTY (BW: 350 Hz) : More than 350 Hz/6 dB Less than 650 Hz/60 dB AM (BW: 6 kHz) : More than 6.0 kHz/6 dB Less
30、 than 15.0 kHz/60 dB FM (BW: 15 kHz) : More than 12.0 kHz/6 dB Less than 20.0 kHz/60 dB Spurious and image : More than 70 dB rejection ratio (except IF through on 50 MHz band) AF output power : More than 2.0 W at 10% (at 13.8 V DC) distortion with an 8 load RIT variable range : 9.999 kHz PHONES conn
31、ector : 3-conductor 6.35 (d) mm (14) External SP connector : 2-conductor 3.5 (d) mm (18)/8 DSP ANF attenuation : More than 30 dB (with 1 kHz single tone) DSP NR attenuation : More than 6 dB (noise rejection in SSB) ? Antenna tuner Matching impedance range HF bands : 16.7 to 150 unbalanced (Less than
32、 VSWR 3:1) 50 MHz band : 20 to 125 unbalanced (Less than VSWR 2.5:1) Minimum operating input : 8 W (HF bands) power 15 W (50MHz band) Tuning accuracy : VSWR 1.5:1 or less Insertion loss : Less than 1.0 dB (after tuning at RF power 100W) Spurious signals may be displayed on the spectrum scope screen
33、regardless of the transceivers state (Tx or Rx). They are gener- ated in the scope circuit. This does not indicate a transceiver mal- function. All stated specifications are typical and subject to change without notice or obligation. for free by RadioAmateur.eu 2 - 1 SECTION 2. INSIDE VIEWS MAIN UNI
34、T USB INTERFACE ATTENUATOR CIRCUITS DDS CIRCUITS 3RD LO CIRCUIT (For SCOPE ) 2ND RX LO CIRCUITS VCA (For TX AF CIRCUITS) (IC2601) T8 LINE CONTROLLER (Q1102) DC AMP (IC1404) D/A CONVERTER (IC1403) 2ND TX IF FILTER SW (IC3502) 2ND TX IF FILTER SW (IC3501) A/D, D/A CONVERTER (IC4301) LIMITER (IC3002) F
35、LASH ROM (IC5102) R8 LINE CONTROLLER (Q1112) 1/2 PRESCALER (IC4005) A/D CONVERTER (IC4004) VCA (For RX AF CIRCUIT) (IC2331) FLASH ROM (IC5002) TRX DSP (IC5001) SCOPE DSP (IC5101) for free by RadioAmateur.eu 2 - 2 CTRL UNIT DC AMP (FOR CURRENT DTECT) (IC81) TUNER LINE SW (RL105) TUNER LINE SW (RL104)
36、 CURRENT DETECTOR (D81) TX LINE CONTROLLER (1/2) (Q132) EXPANDER (IC261 ) +5V REGULATOR (IC204 ) DC AMP (FOR SWR DETECT) (IC1) PHASE COMPARATOR (IC23) DC AMP (FOR RESISTANCE AND REACTANCE DETECT) (IC51) DC AMP (FOR PHASE DETETECT) (IC21) TX LINE CONTROLLER (2/2) (Q131) BUFFER AMP (FOR PHASE DETECT)
37、(IC22) TUNER CPU (IC201) EEPROM (IC202) CPU REGULATOR (IC203) for free by RadioAmateur.eu 2 - 3 PA UNIT +5V LINE REGULATOR (IC2) +3R3V LINE REGULATOR (IC1) DRIVER (Q2) ATC 5 A FUSE (F1) POWER AMP (Q2) DRIVER (Q3) COOLING FAN CONTROLLER (IC101) COOLING FAN DRIVER (Q101) POWER AMP (Q101) PRE-DRIVER (Q
38、1) for free by RadioAmateur.eu 2 - 4 PLL UNIT LEVEL CONVERTER (IC2) PLL CIRCUIT (FOR VCO-A) (IC381) EXPANDER (IC4) VCO-A DDS CIRCUIT (FOR VCO-A) (IC101) DDS CIRCUIT (FOR 2ND RX LO, 3RD TX LO) (IC701) VCO-B DDS CIRCUIT (FOR VCO-B) (IC403) PLL CIRCUIT (IC681) AND LO AMP AND FILTER CIRCUITS (FOR VCO-B)
39、 LO AMP AND FILTER CIRCUITS (FOR VCO-A) SUB LOOP VCO (Q451) EXPANDER (IC3)LEVEL CONVERTER (IC102) for free by RadioAmateur.eu 2 - 5 1ST RX IF CIRCUIT (FOR SUB READOUT) RF UNIT XTAL FILTER (Bw=15 kHz) (FI7001) PREAMP (Q4201, 4202) 1ST RX IF CIRCUIT (FOR MAIN READOUT) PRE AMP BOARD BPF UNIT MCF-M BOAR
40、D MCF-W BOARD MCF-N BOARD XTAL FILTER (Bw=6 kHz) (FI6001) XTAL FILTER (Bw=3 kHz) (FI5001) for free by RadioAmateur.eu 3 - 1 RF CIRCUITS SECTION 3. CIRCUIT DESCRIPTION TUNER_ NETWORK RL101 1.6- LPF 0.03-1.599999 MHz TX circuits LPF PRE AMP Q4201/Q4202 PRE AMP Q4203 59.999999 MHz8- 7.999999 MHz ATTATT
41、 D131 CP3 CP4 CURRENT DETECT ANT1 J5J6 ANT2 TUNER UNIT CTRL UNIT RF UNIT To the 1st RX IF circuits B0 D801D802 RX ANT 6 dB12 dB D201 PREAMP BOARD INOUT D81 RL105 RL104 RL103 TX circuits RL105 RL104 RL101 RL102RL103 BPF BOARD BPFs (B1-B5) RX FILTER CIRCUITS BPFs (B5-B10, B10W) 3-1 RECEIVER CIRCUITS A
42、NTENNA SWITCHING CIRCUIT AND ANTENNA MATCHING CIRCUITS (CTRL AND TUNER UNITS) RX signals from the antenna connector; ANT1 (J5) or ANT2 (J6) are passed through the antenna switch (RL101) and current detector (D81), and applied to the RF UNIT via the tuner switches (RL104 and RL105), RX line switch (R
43、L103) and LPF. If the automatic antenna tuning function is activated, the RX signals from the current detection circuit (D81, 301, 302) are applied to the antenna tuning network on the TUNER UNIT to match the transceiver to the connected antenna automatically. The RX signals from the TUNER UNIT are
44、applied to the RF UNIT via the RX line switch (RL103) and LPF. ATTENUATOR CIRCUITS (RF UNIT) The RX signals from the CTRL UNIT are passed through the RECEIVE ANTENNA IN/OUT CONNECTOR switches (RL104, 105) and RX line cut switch (RL101), then passed through or bypassed the attenuator circuits, accord
45、ing to the setting. The combination of attenuator (or bypass) that the RX signals are passed through determines the entire attenuation level; 0 dB, 6 dB, 12 dB or 18 dB. The RX signals which are passed though or bypassed the attenuator circuits are applied to the BPF circuits. BPF CIRCUITS (RF UNIT
46、AND BPF BOARD) The RX signals from the attenuator circuits are passed through an LPF or one of BPFs correspond to the operating frequency, to remove unwanted out-of-band signals. The table below shows filter which the RX signals are passed in each frequency range. Name of BPF Frequency rangeLocated
47、on B00.031.599999 MHzRF UNIT B11.61.999999 MHzBPF BOARD B22.02.999999 MHzBPF BOARD B33.03.999999 MHzBPF BOARD B44.05.999999 MHzBPF BOARD B56.07.999999 MHzBPF BOARD B6810.999999 MHzRF UNIT B71114.999999 MHzRF UNIT B81521.999999 MHzRF UNIT B92229.999999 MHzRF UNIT B10 (for RX) 5054 MHzRF UNIT B10W 304
48、9.999999 MHz 54.00000159.999999 MHz RF UNIT B10TX (for TX) 5054 MHzRF UNIT The fi ltered RX signals are applied to the PREAMP BOARD. PREAMPLIFIERS (PREAMP BOARD) The RX signals from the BPF circuits are applied to or bypassed the preamplifi er. When the PREAMP FUNCTION is activated, the RX signals a
49、re amplified by one of preamplifiers (Q4201, Q4202 or Q4203). The amplifi ed or bypassed RX signals are applied to the RF UNIT again. for free by RadioAmateur.eu 1ST RX IF CIRCUITS 3 - 2 LPF BPF XTAL BPF XTAL BPF XTAL SPLIT L1018 HYBRID COMBINER PIN DIODE PIN DIODE ATT IF AMP RF AMP 1st RX LO signals for sub readout 1st RX LO signals for main readout (64.485-124.455 MHz) (64.485-124.455 MHz) LPF ATT IF AMP RF AMP TX CIRCUITS 15K Fc=60MHz From the PRE
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