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: The encoder does not respond when it is pressed
Fault phenomenon: A certain button does not respond when it is pressed
Fault Phenomenon
Maintenance Method
Display
Checkpoint
The encoder does
not respond when it
is pressed
Check whether the encoder
switch pins are faultily
welded or there is any
grounding short circuit
H.J.K
Also pay attention to whether the other three pins of the encoder
are short-circuited by lap welding of adjacent pins.
Some of these fault points are very subtle, such as PCB
disconnection, or rubbing of the solder mask on the PCB by the
metal fixing pins of the encoder, resulting in a grounding short
circuit of the pin wiring.
Fault
Phenomenon
Maintenance Method
Display
Checkpoint
A certain button
does not respond
when it is pressed
Check whether the two pins
are connected after the button
is pressed
Fault button
Check with power off.
Some of these fault points are very subtle, such as PCB
disconnection, or rubbing of the solder mask on the PCB by the
metal of the button casing, resulting in a grounding short circuit.
Button
Button
