Yaesu FT-897 Manual

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www.radioaficion.comFT-897 AlignmentVertex Standard Co., Ltd.1FT-897 AlignmentLocal Oscillator AdjustmentReference Frequency Adjustmenta. Connect a frequency counter to TP1032.b. Adjust the trimmer capacitor (TC5001) for 67.875000MHz ±5Hz on the frequency counter.c. Connect a RF millivoltmeter or an oscilloscope to the J5002 2pin (TP1032) and confirm that theoutput level is at least 70mVrms or 200mVp-p.PLL Adjustment VCOVCV Adjustmenta. Connect a DC voltmeter to J2002 6pin (TP1028) and referring to the table below, tune thetransceiver to each frequency listed. Then con firm that the correct voltage is present, or adjust thelisted components for the required voltage.Tune to : Adjust / Confirm For13.895MHz Adjust T2001 5.5V ±0.5V76.000MHz Confirm At least 0.8V32.995MHz Adjust T2002 5.5V ±0.5V13.900MHz Confirm At least 0.8V55.995MHz Adjust T2003 5.5V ±0.1V88.000MHz Confirm At least 0.8V163.995MHz Adjust L2010 5.5V ±0.1V108.000MHz Confirm At least 0.8V469.995MHz Adjust L2011 5.5V ±0.1V420.000MHz Confirm At least 0.8V1st Local Output Levela. Connect a RF millivoltmeter to J2002 11pin and tune the transceiver to 28.000MHz.b. Confirm that the RF level is at least +3dBm or 300mVrms.PLL Unlocka. Connect a DC voltmeter to J2002 1pin (TP1027).b. When the reference input is not activated, the voltmeter shows less than 0.5V and"UNLOCK" is displayed on the LCD.c. When the reference input is activated, the voltmeter shows at least 3.5V and LCD displaysas it normally should do.Idling Current AdjustmentBefore alignment, set the mode on CW and tune the transceiver to 1.800MHz.