Pa-A Unit Adjustment; Pre-Drive Stage Idling Current Adjustment - Yaesu FT-950 Technical Supplement

Alignment

PA-A Unit Adjustment

Preparation
Connect the 50-Ohm Dummy Load and Wattme-
ter to the "ANT 1" jack.
Disconnect the coaxial cables from J5001 and
J5006 on the PA-A Unit, then terminate J5001 and
J5006, each with a 50-Ohm resistor.
Disconnect the jumper plugs from J5003 and
J5004 on the PA-A Unit, and remove the jumper
wire that is connected between TP5031 and
TP5032 on the PA-A Unit.
J5006
ALIGNMENT-10

Pre-Drive Stage Idling Current Adjustment

Connect the DC ammeter to J5003 on the PA-A
Unit.
Press and hold in the [1.8(1)], [3.5(2)], and [7(3)]
keys, while turning the radio on, to enter the
alignment mode.
Rotate the Main Tuning Dial knob to select the
alignment parameter "H-01 Pdb".
P r e s s t h e P T T b u t t o n , t h e n a d j u s t t h e
[CLAR(VFO-B)] knob so that the DC ammeter
reading is "100 mA (±5 mA)".
Release the PTT button.
PA-A U A P
NIT LIGNMENT OINTS
TP5032
TP5031
J5004
J5003
J5001
FT-950 Technical Supplement