5. MAINTENANCE
5.1.
GENERAL
Read the health and safety warnings in chapter
1.2 Health and Safety Warnings
.
Note:
The remote unit does not require preventative maintenance
measures.
Maintenance of the ION-M8P S should be performed on a 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 6.1.3 Environmental and Safety Specifications. 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.
SMA connectors have a specified torque of 100 Ncm. Use an appropriate tool to
fasten and unfasten these connectors. 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.
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