SOUTH
ET
‐
02/05
ELECTRONIC
THEODOLITE
SERVICE
MANUAL
13
SOUTH
SURVEY
&
MAPPING
INSTRUMENT
CO.,
LTD.
13
.
Maintenance of ET faults
The maintenance of Fault 01--- Fault 07
fix cover loose (adjust the gap)
mechanical
vertical axis fix screw(tighten)
Fault 01
Level CCD (Reset according to adjusting instruction, if the error still exist,
circuit replace a new CCD)
the host circuit (replacement)
Fault 02
：
rotate too fast in vertical direction (protection error)
Fault 03
：
rotate too fast in horizontal direction (protection error)
Fault 04
：
Vertical CCD sensor (the same as fault 07)
A, week signal (readjusting signal)
B, encoder disk dirty (clean the disk)
C, CCD malfunction or the surface of CCD dirty (clean it or replace it)
D, sunlight leak into the inner-instrument though the cover gap
E, main board malfunction (replace a new one)
Fault 05
：
Horizontal CCD sensor (the same as fault 06)
A, week signal (readjusting signal)
B, encoder disk dirty (clean the disk)
C, CCD malfunction or the surface of CCD dirty (clean it or replace it)
D, sunlight leak into the inner-instrument though the cover gap
