Yaesu FTDX5000 Series Technical Supplement page 34

Alignment
PA-B Unit Adjustment
Preparation
Disconnect the coaxial cables from J5501 and
J5517 on the PA-B Unit, then terminate J5501 and
J5517 with 50-Ohm resistors.
Disconnect the jumper plugs from J5531 and
J5004 on the PA-B Unit.
Pre-Drive Stage Idling Current Adjustment
Connect the DC ammeter to J5531 on the PA-B
Unit.
Press and hold in the [1(1.8)], [2(3.5)], and [3(7)]
keys, while turning the radio on, to enter the
alignment mode.
Rotate the Main Tuning Dial knob to select the
alignment parameter "14-01 PDR-BIAS."
Press the PTT button and then adjust the (VFO-
B)[SELECT] knob so that the DC ammeter read-
ing is "50 mA (±5 mA)."
Release the PTT button.
Drive Stage Idling Current Adjustment
Disconnect the 13.8 V Power cable from J5531.
Connect the DC ammeter between J5531.
Rotate the (VFO-A)[SELECT] knob to select the
alignment parameter "14-02 DR1-BIAS."
Press the PTT button and then adjust the (VFO-
B)[SELECT] knob so that the DC ammeter read-
ing is "700 mA (±50 mA)."
Release the PTT button.
Rotate the (VFO-A)[SELECT] knob to select the
alignment parameter "14-03 DR2-BIAS."
Rotate the (VFO-B)[SELECT] knob so that the
VFO-B frequency display shows "0."
Final Stage Idling Current Adjustment
Connect the DC ammeter between J0006 (pin 2)
and Pin 2 Connector on the PS Unit.
Rotate the (VFO-A)[SELECT] knob to select the
alignment parameter "14-04 F1-BAIAS."
Press the PTT button and then adjust the (VFO-
B)[SELECT] knob so that the DC ammeter read-
ing is "500 mA (±50 mA)."
Release the PTT button.
Rotate the (VFO-A)[SELECT] knob to select the
alignment parameter "14-05 F2-BAIAS."
Press the PTT button and then adjust the (VFO-
B)[SELECT] knob so that the DC ammeter read-
ing is "500 A (±50 mA)."
Release the PTT button.
ALIGNMENT-18
CLASS-A Final Stage Idling Current Adjustment
Connect the DC ammeter between J0006 (pin 2)
and Pin 2 Connector on the PS Unit.
Rotate the (VFO-A)[SELECT] knob to select the
alignment parameter "14-06 F1A-BAIAS."
Press the PTT button and then adjust the
[SUB(VFO-B)] knob so that the DC ammeter read-
ing is "3.3 A (±0.1 A)."
Release the PTT button.
Rotate the (VFO-A)[SELECT] knob to select the
alignment parameter "14-07 F2A-BAIAS."
Press the PTT button and then adjust the (VFO-
B)[SELECT] knob so that the DC ammeter read-
ing is "3.0 A (±0.1 A)."
Release the PTT button.
Termination
Press and hold in the [MENU] button for 2 sec-
onds to save the new setting and exit from the
alignment mode.
Disconnect the 50-Ohm resistors from J5501 and
J5517, then connect the coaxial cables to J5501 and
J5517.
FT 5000 Series Technical Supplement