2Nd/3Rd Local Oscillator Adjustment; Ref Osc Adjustment - Yaesu FT-891 Technical Supplement

2nd/3rd Local Oscillator Adjustment

 Set the VFO-A frequency to 14.200 MHz in the
CW-USB mode.
 Set the following controls as indicated:
[ IPO ] : ON
[ ATT ] : OFF
[ NB ] : OFF
[ AGC ] : AUTO
[ RF GAIN ] : Fully clockwise
3rd Local Level Adjustment
 Connect the RF millivoltmeter to TP1041 on the
MAIN Unit.
 Adjust T1023 on the MAIN Unit for maximum
deflection on the RF millivoltmeter.
2nd Local Level Adjustment
 Connect the RF millivoltmeter to TP1022 on the
MAIN Unit.
 Adjust T1013, T1014 and T1016 on the MAIN
U n i t f o r m a x i m u m d e f l e c t i o n o n t h e R F
millivoltmeter.
TP1022
T1016
T1014
T1013
TP1041
T1023

REF OSC Adjustment

 Connect the frequency counter to TP1022.
 Press and hold in the [ A ] , [ B ] and [ C ] keys,
w h i l e t u r n i n g t h e r a d i o o n , t o e n t e r t h e
alignment mode.
 Rotate the [ MULTI ] function knob to select the
alignment menu item "01-02 REF FREQ".
 Rotate the [ RF/SQL ] knob so that the frequency
counter reading is "69.000000 ±5 Hz".
 Disconnect the frequency counter from TP1022.
 Connect the frequency counter to J1002.
 Press and hold the PTT switch, then rotate the
[ RF/SQL ] knob so that the frequency counter
reading is "50.000000 ±150 Hz".
 Release the PTT switch.
 Press and hold in the [ F ] key to save the new
setting and exit the alignment mode.
J1002
ALIGNMENT-4
Alignment
FT-891 Technical Supplement