
MIP LM 3086 SE/EPA3 manual, rev2
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16.10.2018
Page 47 / 105
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5.2.3
TRANSMITTER SIDE
The transmitter side has only one area for dirt accumulation, and needs cleaned very infrequently, unless a
purge air problem deposits dirt inside the transmitter. The area that is sometimes affected is the chopper
mirror.
EPA3
1.
Open the transmitter door.
2.
Detach one of the chopper motor lines on block XA3. This is a low-voltage power supply (8VDC). This
will stop the mirror from turning.
3.
Remove the chopper mirror cover plate (see dia
gram in drawings). It’s held by the smaller set of Allen
screws (2mm).
4.
Examine both sides of the chopper mirror by shining a flashlight on the surfaces of the mirror.
5.
Clean dirt off mirrors with a Q-tip and lens cleaner. Blow out any dust that may be present on the
mirror or in the chopper space.
6.
Replace the cover plate and the screws.
7.
Re-attach the chopper motor wires.