Vertex Standard VX-1700 Series Service Manual page 17

F S I
INAL ECTION DLING
 Connect the 50 Ohm Dummy Load to the ANT
jack, and connect the DC Ammeter (Range: 25-
A) to the DC Power Cable.
 Remove the Cooling Fan Cable from J5001 on the
PA-4.
 Set VR5004 and VR5005 on the PA-4 Unit fully
counter-clockwise.
 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 write
down the current consumption.
 Key the transmitter (connect pin 3 of the MIC jack
to GND) with no microphone input, then adjust
VR5004 so that the current consumption is more
than 1 A (±100 mA) from the previous step, and
adjust VR5005 so that the current consumption
is more than 2 A (±100 mA) from the previous
step.
 Disconnect the DC Ammeter, and re-connect the
Cooling Fan Cable to J5001.
VX-1700 Series (EXP Version) Service Manual
C A
URRENT LIGNMENT
CM C B
OUPLER ALANCE
 Connect the 50 Ohm Dummy Load and Inline
Wattmeter to the ANT jack, and connect the CW
keyer to the KEY jack.
 Connect the DC voltmeter to TP5028 ("+" lead,
"–" lead: GND) on the PA-4 Unit.
 Tune the radio to 29.000 MHz, A1A mode.
 Key the transmitter (close the CW key).
 Now adjust TC5001 on the PA-4 Unit for mini-
mum indication on the DC voltmeter.
17