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 power of the whole section is small (only ≤ 10W)
Maintenance methods:
Fault cause 1: this fault is generally caused by the reverse
welding of the primary and secondary coils of the input
transformer.
Transformer primary (near RD06 end): 2T
Transformer secondary (near RD16 end): 6T
Fault cause 2: two feedback resistors are faultily welded or
desoldered.
Feedback resistor
Secondary
Primary
Input transformer
Feedback resistor
