Icom IC-M422 Service Manual

Also see for IC-M422: Instruction manual Service manual

Contents

5 - 1EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGEDC power supply Output voltage : 13.8 V DCCurrent capacity : More than 10 A Audio generator Frequency range : 300–3000 HzMeasuring range : 1–500 mVRF power meter(terminated type)Measuring range : 1–30 WFrequency range : 100–300 MHzImpedance : 50 ΩSWR : Less than 1.2 : 1Standard signalgenerator (SSG)Frequency range : 0.1–300 MHzOutput level : 0.1 μV to 32 mV(–127 to –17 dBm)Frequency counterFrequency range : 0.1–300 MHzFrequency accuracy : ±1 ppm or betterSensitivity : 100 mV or betterOscilloscope Frequency range : DC to 20 MHzMeasuring range : 0.01–20 VFM deviation meter Frequency range : 30–300 MHzMeasuring range : 0 to ±10 kHz AC millivoltmeter Measuring range : 10 mV to 10 VDC volt meter Input impedance : 50 kΩ /V DC or moreExternal speaker Input impedance : 4 ΩCapacity : More than 5 WAttenuator Power attenuation : 40 or 50 dBCapacity : More than 30 WSECTION 5 ADJUSTMENT PROCEDURES5-1 PREPARATIONM REQUIRED TEST EQUIPMENTSTo the antenna connectorTo DC power connectorStandard signalgenerator0.1 μV to 32 mV(–127 to –17 dBm)CAUTION:DO NOT transmit while SSG is connectedto the antenna connector.DC power supply13.8 V /10 AFrequencycounterFM deviationmeterAttenuator40 dB or 50 dB+–RedBlackRF power meter1–30 WTo external speaker leadDistortion meterAC millivoltmeterSpeaker (4 Ω)SP+ (Yellow)SP− (Black)M CONNECTION