User's Manual | ACOM 1010 | HF Linear Amplifier
Page 32 of 40 | S e c t i o n MAINTENANCE
July 2021
5.6.
Service Functions
By pressing the
OPER
and
RTTY
buttons simultaneously, the upper LED bar-graph is switched to the
SERVICE mode, which is indicated by both red bar-graph lights and the yellow
G1
light illuminating. Pressing
the
OPER
and
RTTY
buttons together again will select additional service measurement functions. Pressing
them a final time will return the amplifier to the normal operating mode. These steps are detailed below:
a)
Press the
OPER
and
RTTY
buttons together. The two red lights on the right side of the upper
bar-graph will illuminate to confirm that the amplifier is in the service mode. The yellow
G1
light will also illuminate. The upper bar-graph should show a grid 1 current reading no higher
than 5 mA (5 LEDs illuminated);
b)
Pressing the
OPER
and
RTTY
buttons once again will now illuminate the yellow
G2
light. This
provides an approximate reading of grid 2 voltage. The scale is 30 V per a LED lighted. The
upper bar graph should show a voltage reading within the range of either 270-300 Volts (9-10
LEDs illuminated) for RTTY or 210-330 Volts (7 to 11 LEDs illuminated) for SSB and CW;
c)
Pressing the
OPER
and
RTTY
buttons yet again will illuminate the yellow
IP
light. This
provides an approximate reading of combined plate current and grid 2 current. The reading
should be no higher than 500 mA (10 LEDs illuminated) for RTTY or 600 mA (12 LEDs
illuminated) for SSB and CW. The scale is 50 mA per a LED lighted;
d)
Pressing the
OPER
and
RTTY
buttons a final time will restore the upper bar-graph to its
normal function of indicating peak forward power.
The Auto-Protection System will continue to operate in the SERVICE mode.
In case it is necessary to ship the amplifier, please, see Section