XIEGU
Product Maintenance Manual G90/G90S Portable Short-Wave Transceiver
XIEGU All Rights Reserved Version No.: 1.0 2022-07 Page
45
of
48
Fault phenomenon: some sections of the transmitting spectrum are abnormal, with large stray
Maintenance methods:
Fault
Phenomenon
Maintenance Method
Base board
Checkpoint
Multi frequency
range adhesion
Check whether there is any pin
connected to tin
B27
Check whether there is any pin
connected to tin
B28
All 0402 packaged chip capacitors on the B27 check point should
be carefully checked. Due to the welding of the transformer and
feedback resistor below, it is easy for this capacitor to connect tin,
resulting in band control disorder. This fault occurs frequently.
