Yaesu FT-107M Maintenance Service Manual Download Page 10 | Manualshive

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Summary of Contents for FT-107M

Page 1: ...MAINTENANCE SERVICE MANUAL FT 107M YAESU MUSEN CO LTD C P O BOX 1500 TOKYO JAPAN YAESU ELECTRONICS CORP P O BOX 49 PARAMOUNT CALIFORNIA 90723...

Page 2: ...ENERAL DESCRIPmON 1 1 SPECIFICATIONS 1 2 SEMICONDUCTORS 1 3 FRONT PANEL CONTROLS AND SWITCHES 1 4 RECOMMENDED ACCESSORIES 1 9 MICROPHONE CONNECTIONS 1 11 INTERCONNECTIONS 1 12 INSTALLATION FT 107M 1 1...

Page 3: ...filter is also included in addition to Yaesu s variable IF band width feature which uses two 8 pole filters to provide continuously variable width of the IF passband from 300 Hz to 2 4 kHz Designed f...

Page 4: ...wn Negative feedback 6 dB at 14 MHz Transmitter frequency stabiiity 300 Hz after 10 minute warmup less than 100Hz after 300 minute warmup Modulation type A3J balanced modulator A3 amplitude modulation...

Page 5: ...7060P 1 NJM78L05 1 5082 7623 6 TA7063P 1 pPC14305 1 SN76514N I pPC14308 3 c 34024P 1 Specifications subject to change without notice ACCESSORIES The following accessones are included with your FT 107M...

Page 6: ...this control sets the carrier level On SSB with the RF processor ON this control sets the drive level 4 MIC GAIN This control sets the AM and SSB microphone amplifier gain level 5 POWER This is the ma...

Page 7: ...is controlled by the FV 107 extemal VFO option while the receive frequency is controlled by the FT 107M internal VFO RX EXT The ieceive frequency is controlled by the FV 107 external VFO option while...

Page 8: ...put which will serve as a reference 25 INDICATORS PROC ATT MARK EXT INT MR M These indicators show the operating condition for the speech processor PROC the 20 dB attenuator ATT the crystal calibrator...

Page 9: ...switch it should be connected at this point 7 ACC 2 This is a 7 pin DIN jack for use with the FTV 107R transverter 8 EXTVFO This is a 6 pin DIN jack for interconnection to the FV 107 external VFO 9 RC...

Page 10: ...nnect AC power to the DC cable Failure to observe this simple precaution will void the warranty During AC operation with the FP 107 insert the DC dumniy plug supplied with the AC power supply into thi...

Page 11: ...r the FT 107M senes capable of operation on the 50 144 and 430 MHz bands The basic unit comes equipped with all control circuitry and the 430 MHz and either the 50 MHz or 144 MHz unit may be installed...

Page 12: ...7M trans ceiver all across the band with FC 107 alitenna coupler You may select three coax fed and 1 random wire antenna Included are an SWR bridge and power output meter Maximum power handl ing capab...

Page 13: ...GENERAL MICROPHONE CONNECTIONS YM 34 MICROPHONE CONNECTIONS l GRAY I YM 35 YM 35 MICROPHONE CONNECTIONS l YM 36 YM 36 MICROPHONECONNECTIONS I d YM 37 MICROPHONE CONNECTIONS...

Page 14: ...HF ANT l Telephone Line...

Page 15: ...sigiis of damage If any dainage has been sustained contact the shipping company immediately and ddcument the damage completely Save the pack ing carton and foam packing material for possible use at a...

Page 16: ...ction against ignition noise while connection to the ignition switch can place the power line in a noisy circuit Keep the power cable as short as possible and keep the lead away from ignition cables B...

Page 17: ...ted on the digital display Now align the analog dia1 skirt so that the bold calibration marking on the skirt is aligned with the vertical calibration point on the subdial window BOTTOM PANEL FEET The...

Page 18: ...omfortable level RF CAIN Fully clockwise APFINOTCH knob 12o clock position BAND Desired band RXCLAR OFF CLARIFIER 12 o clock position f M FINE 12 o clock position ATT OFF APFINOTCH switch OFF AGC F NB...

Page 19: ...may switched into the incoming receive line Set the ATT switch to ON for this purpose TRANSMITTER OPERATION The FT I07M transmitter is extremely easy to use requiring only presetting of the controls...

Page 20: ...he microphone in a normal voice and do not change the MIC CAIN setting performed in step 3 Advance the COMP control to the 10 o clock position and adjust the DRIVE control so that the ALC meter needle...

Page 21: ...ry system RX MR This position selects RX operation on the ineniory with TX operation on tlie FT 107M internal VFO TX MR This operation selects TX operation oii the memory with RX operation on the FT 1...

Page 22: ...e SELECT switch to RX MR you will now be listening on 7090 kHz while transmitting on 7205 kHz To listen to the pile up of stations on 7205 kHz calling DXIDX set the SELECT switch to VFO you will now b...

Page 23: ...AA is traiisiiiitting on 14195 kHz tuning between 14225 and 14250 kHz watchiiig DXgAA s operating practice you notice that he listens for stations at 5 kHz intervals with in the above range Here s how...

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