Icom 746pro service manual




















RF voltage is detected vided by 2 to produce an acceptable frequency signal, 16 by C12—C14 and rectified at D4. The rectified voltage is am- MHz, with the programmable divider then divided again by plified at the C-MOS inverter amplifier IC14c and buffer am- to obtain kHz cycle square-wave signals. The amplified signal is then applied to the phase comparator IC3b. D6 for conversion into DC voltage. Using 2 tuning motors, fier is very responsive, and ensure quick and stable signal the matching circuit obtains rapid overall tuning speed.

The detected resistance components are add capacitors C34—C Reference oscillator X Inpout port for the forward RF 3 AN0 power voltage. CPU system clock. Output ports for the tuning motor 45—48 P03—P00 MF1 drive signals. Input port for the reactance compo- 64 AN3 nents detection voltage. FM deviation meter Standard signal generator.

Modulation analyzer Attenuator to the antenna connector. RF power meter to [DC Ammeter DC power supply. PTT 2-conductor 3. CW point J Frequency : 1. R Ic APC adjustment. CW [ANT1] connector. CW MHz] connector. CCW attenuator. CW attenuator. AMP] : P. AMP1 point CP TX RX 1. Because transceiver auto- matically transmits when most transmit items in the [F-1 TX ] is selected. Frequency : Level : 3.

C1 S. C7 S. L1 S. C4 S. R2 S. R6 S. J1 S. IC S. C S. D3 S. D51 S. COIL 0. R S. C72 S. EP S. D S. CP S. J S. IC1 S. D1 S. Q14 S. R1 S. D15 S. EP1 S.

C31 S. IC X24C04S X1 S. C44 S. C75 S. C1 C2. MSA -8V. LFMD 1. BKL 5VL 22 2 22 2. ALC T8V. GND V-B2. W12 to RF unit J 1 3. GND V-A1. V-A2 V-T1. P14V H14V. V-A2 V-B2. V-A1 V-B1. PHV R8V. P8V P8V. W19 J J J MIC 5VL. L2 L3 ns 2.

Open navigation menu. HMS Schematic. HM Service manual. HM 23 Schematic. HM Schematic and description. HMA Schematic. HM Instruction manual. HM Pinout. HMa Schematic2nh4. HSsa Instruction manual. HS Instructions. ICAT Schematic. ICE Pocket guide. ICN Instruction manual. ICAT Instruction manual. ICAT Quick function. ICAT Service manual. ICA Instruction manual. IC Schematic. IC Instruction manual. ICA E Schematic. ICA E Instruction manual. IC Service manual. ICA Brochure.

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IC-A Instruction manual. IC-A Service manual. IC-A Service manual addendum. IC-A14 Instruction manual. IC-A15 Service manual addendum. IC-A1 Owners manual.

IC-A Connector. IC-A20 Owners manual. IC-A20 Service manual. IC-A Service manual with addendum march IC-A21 Instruction manual. IC-A21 Service manual.

IC-A22 A3 Service manual. IC-A22 Instruction manual. IC-A23 Instruction manual. IC-A2 Maintenance manual. IC-A2 Owners manual. IC-A3 Instruction manual. IC-A4E Service manual.

IC-A4 Instruction manual ver1. IC-A4 Instruction manual ver2. IC-A5 Instruction manual. IC-AG Schematic. IC-AG1 Schematic. IC-AH1 Instruction manual. IC-Alpha6 Italian manual. IC-AT Schematic and print layout. IC-BU1 Instruction manual.

IC-DC1 Instruction manual. IC-DC1 Schematic. IC-E Datasheet. IC-E Service manual. IC-E Instruction manual. IC-E Manual German. IC-E7 Datasheet. IC-E7 Service manual. IC-E80D Instruction manual. IC-E90 Instruction manual.

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IC-F3 Schematic. IC-FF Service manual with addendum feb IC-F Series Service manual. IC-F Service manual addendum. IC-F F series Service manual.

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IC-H8 Service manual. IC-HM10 Instruction manual. IC-HM12 15 Schematic. IC-HM14 Schematic. IC-HM8 Instruction manual. IC-M Owners manual. IC-M10E Instruction manual. IC-M10 Service manual. IC-M11 Instruction manual. IC-M11 Service manual. IC-M Instruction manual. IC-M Service manual. IC-M12 Instruction manual.

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IC-M34 Service manual. IC-M3A Instruction manual. IC-M3Euro Instruction manual. IC-MEuro Instruction manual. IC-MEuro Service manual. IC-M Datasheet. IC-M service manual. IC-M M Service manual with addendum.

IC-M45Euro Instruction manual. IC-M45 A Instruction manual. IC-M45 Service manual. IC-MD Instruction manual. IC-ME Service manual.



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