XIEGU
Product Maintenance Manual G90/G90S Portable Short-Wave Transceiver
XIEGU All Rights Reserved Version No.: 1.0 2022-07 Page
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Fault phenomenon: There is no prompt tone for turning on or off the machine
Maintenance methods:
Name
Setting Parameters
Parameter 1
Parameter 2
Parameter
3
Oscilloscope
Time base: 1ms
Y-axis:
100mV
X10 gear
Under the receiving state, the condition of checkpoint A32 measured is
as follows:
Checkpoint
Voltage V
Name
A32
0.94
Operational amplifier
reference voltage
At startup/shutdown, A31 conditions should be measured as follows:
Checkpoint
Amplitude mVpp
Name
A31
About 100
Prompt tone signal for
turning on or off the machine
At the same time, a sine wave signal should be seen on the oscilloscope,
which is an on/off prompt signal.
