Yaesu FT-891 Technical Supplement

FT-891 Technical Supplement
Alignment
ALIGNMENT-4
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
Unit for maximum deflection on the RF
millivoltmeter.
REF OSC Adjustment

Connect the frequency counter to TP1022.

Press and hold in the
[
A
]
,
[
B
]
and
[
C
]
keys,
while turning the radio on, to enter the
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.
TP1041
TP1022
T1016
T1014
T1013
T1023
J1002

Yaesu FT-891 Specifications

General

Brand	Yaesu
Model	FT-891
Category	Transceiver
Language	English