Yaesu FT-891, Technical Supplement

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FT-891 Technical Supplement
Alignment
ALIGNMENT-6
MCF 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
[AGC] : AUTO
[RF GAIN] : Fully clockwise

Connect the AF millivoltmeter and 4 Ohm
dummy load to the EXT SP jack.

Connect the RF Signal Generator to the ANT
jack, then set the output level to +10 dBμ at the
14.200 MHz.

Adjust T1011 and T1012 on the MAIN Unit
in succession several times for maximum
deflection on the AF millivoltmeter.
Note
: If the S-meter deflects while adjusting,
reduce the RF Signal Generator output so
that the S-meter does not deflect.
IF Trap Adjustment

Set the VFO-A frequency to 51.900 MHz in the
CW-USB mode.

Set the following controls as indicated:
[IPO] : ON
[ATT] : OFF
[AGC] : AUTO
[RF GAIN] : Fully clockwise

Connect the AF millivoltmeter and 4 Ohm
dummy load to the EXT SP jack.

Connect the RF Signal Generator to the ANT
jack, then set the output level to +40 ~ +80 dBμ
at the 69.450 MHz.

Adjust T1005 on the MAIN Unit for minimum
deflection on the AF millivoltmeter.
Note
: If the S-meter deflects while adjusting,
reduce the RF Signal Generator output so
that the S-meter does not deflect.
T1011 T1012 T1005