Yaesu FT-710, Manual

Page: 12 / 75

Alignment
FT-710 Technical Supplement
ALIGNMENT -5
PA Unit Adjustment
Preparation

Connect the 50-Ohm Dummy Load and Watt
-
meter to the ANT jack.

Disconnect the coaxial cables from J4001 on the
PA Unit, then terminate J4001 with a 50-Ohm
resistor.

Disconnect the jumper plugs from J4004 and
J4005 on the PA Unit.
Pre-Drive Stage Idling Current Adjustment

Connect the DC ammeter to J4004 on the PA Unit.

Rotate the [FUNC] knob to select the alignment
parameter “050 [TX] MF PREDR-BIAS”.

Press and hold the PTT switch then adjust the
[STEP/MCH (DSP)] knob so that the DC amme
-
ter reading is “100mA (±10mA)”.

Release the PTT switch.

Rotate the [FUNC] knob to select the alignment
parameter “053 [TX] HF PREDR-BIAS”.

Press and hold the PTT switch then adjust the
[STEP/MCH (DSP)] knob so that the DC amme
-
ter reading is “100mA (±10mA)”.

Release the PTT switch.

Rotate the [FUNC] knob to select the alignment
parameter “056 [TX] VHF PREDR-BIAS”.

Press and hold the PTT switch then adjust the
[STEP/MCH (DSP)] knob so that the DC amme
-
ter reading is “100mA (±10mA)”.

Release the PTT switch.
J4001 J4004 J4005