Chapter4 Maintenance Procedures And Solutions To Common Faults; Maintenance Procedure; Troubleshooting Procedure Of The Baseband Processing Interface Module - Huawei ETS2000 Series Maintenance Manual

HUAWEI ETS2000 series Wireless FWT Maintenance Menu
Chapter4

4.1 Maintenance Procedure

4.1.1 Troubleshooting Procedure of the Baseband Processing
Interface Module
1. Power fault maintenance procedure
Maintenance Procedures and Solutions to Common
power-on and startup
Yes
Can the voltage reach foot 12 of U302?
Yes
Does the voltage of L302 foot reach 4.4V?
Yes
End
Figure 4-1
0Chapter4 Maintenance Procedures and S
Faults
.
Power fault maintenance procedure
35
olutions to Common Faults
No
Check F301 and d305 and
remove fault components
No
Check u302 and surrounding
circuit and remove fault
components