14
Alignment
PA Unit Alignment
PRE-DRIVER SECTION IDLING CURRENT ALIGNMENT
Connect the 50 Ohm Dummy Load to the ANT
jack.
Remove the shorting-plug from J2003 on the PA
Unit, then connect the DC Ammeter to J2003 (pin
1: “–” lead, pin 2: “+” lead).
Set VR2001 on the PA Unit fully counter-clock-
wise.
Tune the radio to 7.500 MHz, USB mode.
Key the transmitter (connect pin 3 of the MIC
jack to GND) with no microphone input, and
adjust VR2001 for 300 mA (± 30 mA) on the DC
Ammeter.
Disconnect the DC Ammeter, and replace the
shorting-plug into J2003.
DRIVER SECTION IDLING CURRENT ALIGNMENT
Connect the 50 Ohm Dummy Load to the ANT
jack.
Remove the shorting-plug from J2004 on the PA
Unit, then connect the DC Ammeter to J2004 (pin
1: “–” lead, pin 2: “+” lead).
Set VR2002 on the PA Unit fully counter-clock-
wise.
Tune the radio to 7.500 MHz, USB mode.
Key the transmitter (connect pin 3 of the MIC
jack to GND) with no microphone input, and
adjust VR2002 for 300 mA (± 30 mA) on the DC
Ammeter.
Disconnect the DC Ammeter, and replace the
shorting-plug into J2004.
PA UNIT ALIGNMENT POINTS
J2004
TP2020
TP2021
VR2003
VR2002
VR2001
J2003
TC2001
TP2018
MIC JACK PINOUT
