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Andrew Wireless Innovations Group M17P26 User Manual

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Page 26 
Manual MF0133AUA.doc
 
5.  MAINTENANCE 
 Note: 
The remote unit does not require preventative maintenance 
measures. 
Maintenance of the ION-Mxxx should be performed on an FRU (Field Replaceable 
Unit) basis only. Do not damage the warranty labels on the components, as this voids 
the warranty. 
 
The spare parts list contains only units that can be replaced without tuning or 
soldering work. 
 
 Note: 
When sending back the unit, use an appropriate packaging, see 
chapter  5.4.4  Environmental and Safety Specifications of ION-
M17P/26EU. We strongly recommend using the original packaging! 
 
Note: 
Defect parts should only be replaced by original parts from the 
supplier. All interventions inside the housing are at one’s own risk. 
 
Note: 
During maintenance ensure that the unit has been disconnected 
from mains. 
 
Note: 
Before disconnecting any cables, label any unlabelled cables to 
ensure correct reconnection. 
To replace an FRU, use the appropriate tools. Replacement tools may be ordered 
from the supplier. All screws have a right-hand thread, turn the tool clockwise for 
tightening and counter-clockwise for loosening. 
 
Do not over-tighten the connectors or screws. The table below shows various screws 
with their respective torques. 
 
Screw Type Tallow-drop Socket-head-cap Countersunk-head 
Thread size 
Specified Torque (in Ncm) 
M 2.0 
40 
not in use 
40 
M 2.5 
82 
not in use 
82 
M 3.0 
145 
100 
145 
M 4.0 
330 
330 
330 
M 5.0 
650 
tbd. 
650 
table 5-1 Specified torques for various screw types 
 
If any FRU not contained in the following chapter needs to be replaced, contact 
customer service for additional instructions.