XIEGU
Product Maintenance Manual G90/G90S Portable Short-Wave Transceiver
XIEGU All Rights Reserved Version No.: 1.0 2022-07 Page
34
of
48
Fault phenomenon: Short circuit at startup
Maintenance methods:
1. Check whether there is continuous tin electrodeposit caused by the
manual welding of components in each point:
Fault
Phenomenon
Maintenance Method
Small signal board
Checkpoint
There is no wave
band voltage output
Check whether there is any false
welding
B1
B2
B3
B4
2. Check whether components of the 9V and 5V voltage regulators
are installed incorrectly, and check whether the two RD16 are
installed incorrectly.
3. Check whether the pins of the output transformer are
short-circuited with the nearby components; or whether there is
continuous tin electrodeposit in nearby components.
