Zte ZXG10 BS21, Руководство по обслуживанию

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Confidential and Proprietary Information of ZTE CORPORATION 175
A p p e n d i x
A
Replacement of Modules and
Parts
Overview
The replacement of the faulty modules and parts is a common and key
method for routine maintenance. During module replacement, the
equipment room maintenance personnel are recommended to contact the
relevant technicians or ZTE local maintenance staff for technical support
and guidance.
Pay attention to the following principles during the replacement of modules
and parts:
1. Good spare parts should be stored in the anti-static bag (damp-proof
bag is recommended in this bag) and then store them properly in a
carton. The type label should be available on the static bag or carton
for easy identification.
2. Anti-static wrist straps should be used when modules are inserted or
unplugged. Connect the anti-static wrist strap to the grounding
terminal of the rack. And never touch the grounding terminal after
connection. There is a 1M
Ω resistor connected in serial between the
anti-static wrist strap and grounding terminal, and any touch to the
grounding terminal may cause a bypass of this resistor.
3. When holding a module by hand, make sure not to touch the circuits,
components and wiring slots on the module. Don't plug/unplug the
module with violent force. The right steps are as follow: Hold the
handle of the panel, and slightly uplift the module, align the module
with the backplane and then insert the module, to avoid bending the
pins or slots on the backplane or modules. After inserting the module,
tighten the fix screws on the module.
4. When plugging/unplugging the RF cable on the front panel of the rack,
use the torque spanner, and never use violent force to avoid
destroying the RF cable connector.