SOUTH
ET
‐
02/05
ELECTRONIC
THEODOLITE
SERVICE
MANUAL
4
SOUTH
SURVEY
&
MAPPING
INSTRUMENT
CO.,
LTD.
4
N. Plumb and Tilt Sensor Unit
The sensor consists of electronic bubble and measurement circuit, which is fixed on the right of main body
by two setscrews. It must ensure the reading of vertical disk is 90
ْْ
and the plate level is centered when the
collimating axis stays horizontal.
Instrument Disassembly Procedure
Preparations:
Prepare screwdriver, nipper, forceps, Hexagon wrench, alcohol etc and clean up hands.
Prepare a tray or other container to place the offloaded screws in case of lost.
If it is necessary record the information of the color and location of every part in order to prevent damaging
the instrument due to false reassemble.
Set the instrument on a suitable table to work for avoiding parts lost and instrument damage.
Brief introduction:
This chapter introduce the normal entire disassembly process of absolute encoder type electronic theodolite
ET-02/ET-05 and the process comply the following steps. The assembly process is the same as the
disassembly if there is not any special note. Please refer to the related information in this chapter if some
parts need to be maintained or replaced. Any part should be fixed with fixing painting on the setscrews after
reassemble except the cover parts such as vertical disk cover, EDM cover and slip ring cover. Though some
parts would be updated when manufacturing the instruction in this chapter is still applied to it. If there are
parts unconformed to this handbook, disassemble them according to the actual situation.
Disassembly
procedure:
Step 1: Left cover
Remove the 6 screws and take off the left cover gently
Take care of the connecting wire between the inside of the
left cover and the beep after opening the left cover, then
remove the left cover.
Step 2: angle main board
Refer to step 1, take off the left cover and remove 4 screws
which fix the angle main board.
Unplug every
connector
from main board carefully and record
their type and location for reassemble. Take care of the
removed angle main board.
