Solution To Common Faults - Huawei ETS2000 Series Maintenance Manual

HUAWEI ETS2000 series Wireless FWT Maintenance Menu
3. RF emission channel fault maintenance procedure

4.2 Solution to Common Faults:

This section is to give solutions mainly according to fault phenomena.
1, Phenomenon: After the telephone is connected with the extgernal power and
the power switch is turned on, it does not react at all.
Solution:
1) Check the input side of the external power supply to make sure that the
mains are normal and contact well with the power connector board;
RF receiving channel fault
Yes
Do foot 2 and foot 3 RF output
ends of RFR6122 work well?
Yes
Us the output of RF surface acoustic filter normal?
Yes
Is the output of u202 RF power amplifier normal?
Yes
Is duplexer out put normal?
Yes
RF receiving channel
works well
Figure 4-9
RF emission channel fault maintenance procedure
43
0Chapter4 Maintenance Procedures and S
olutions to Common Faults
No
No
No
No
Check circuits like power, tcxo,
and emitting agc voltage and
remove fault circuits
Check the input end and
output end of foot 1 and foot 3
of u201, and remove the
surrounding circuit fault
Check the input end and output
end of foot 4 and foot 8 of u202,
and remove the surrounding
circuit fault
Check the input end and output
end of foot 5 and foot 8 of u101,
and remove the surrounding
circuit fault