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: power out of control (output exceeds 22W, and regulation is invalid)
Fault phenomenon: The standing wave of the variable capacitor cannot be adjusted to the
minimum
Maintenance methods:
Power out of control: this fault is generally caused by the false
welding of standing wave bridge unit or FPC socket unit. Check
the welding condition.
The standing wave cannot be adjusted to 0: check whether the
variable capacitor of the standing wave bridge unit is welded well;
check whether the coil winding of the standing wave coupler is
broken.
During the maintenance, LM358 damage is found, so pay
attention to screening.
Standing wave
bridge
FPC socket
