OHAUS TROOPER, Руководство по обслуживанию

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2-4
CHAPTER 2 DIAGNOSIS
SYMPTOM
Display is not on or partial
characters are displayed.
PROBABLE CAUSE
Main PC Board is defective.
REMEDY
The Main PC Board is replaced as a
whole assembly. Check procedures in
Table 2-1 first and verify that other prob-
lems do not exist.
Replace Main PC Board. -> Repair
Procedures 3.2.
TABLE 2-4 TROOPER SCALE - NO DISPLAY OR PARTIAL DISPLAY.
SYMPTOM
Scale can be turned on but will
not calibrate.
PROBABLE CAUSE
Incorrect weights.
LFT lock switch is in the
locked position and/or
The software lock menu is
set to ON (LCL On).
Load cell assembly defec-
tive.
REMEDY
Verify that proper weights are used.
Set LFT lock switch to unlocked posi-
tion and/or
Set the software lock menu to OFF
(LCLOFF), then refer to instruction
manual.
Remove the 6 screws from the bottom
cover of the scale. Carefully remove the
platform. Lift the top cover and lay
aside leaving the cables connected to
the Main PC Board.
With the scale plugged in and turned
on, measure voltage on terminals -EXE
and +EXE. The nominal voltage should
be 5 V dc. If the voltage is much lower,
disconnect the load cell from the PC
Board and measure again. If 5V dc is
present, the load cell may be shorted
and requires replacement. Continue,
see next page.
TABLE 2-5 TROOPER SCALE - CANNOT CALIBRATE.