GE MOA 280i, Руководство по эксплуатации и обслуживанию

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GE Analytical Instruments ©2006
16-10
DLM 14291 Rev. A
No Display
If there is power to the NOA as indicated by operating fans, but the display is
blank then either the fuse on the Power Supply Board is blown, the cables are not
connected or the contrast needs adjustment.
To check the fuse on the Power Supply Board:
•
Remove the power cord from the analyzer.
•
Remove the NOA top cover.
•
Locate the Power Supply Board on the front right-hand side of the NOA (see
Figure 15-5). The round fuse is located on the left side of the board, near the
top (just below TP3 HV Adj.).
•
Remove the fuses from the board. Use an ohm meter to test the resistance of
the fuse. If the fuse is blown, then the resistance will be infinite.
•
If a fuse is blown, replace it with one of identical type and current rating.
Refer to the System Specification section of this manual for a listing of fuse
types and ratings appropriate the NOA 280i.
To check the Cables:
•
Remove the power cord from the analyzer and remove the NOA top cover.
•
A ribbon cable connects to the LCD display and the Digital Board (last board on
right-hand side of NOA). Ensure that the cables are secure in the connectors.
If the fuse is OK and the cables are secure, the contrast may need adjustment.
This requires that the NOA be turned on with the top cover removed (Warning:
Hazardous Volatages are present!) To Adjust the Contrast:
•
Turn off the NOA power and remove the top cover.
•
Locate the Contrast Adjustment on the Digital Board (small white screw near
bottom, right corner of board).