ETS-Lindgren 2090 Controller User Manual

Page 138

Appendix B: Maintenance

Model 2090 Multi-Device Controller

2. Disconnect all power and cables from the Model 2090

and move it to an open work area.

3. Use an anti-static wrist strap or other suitable ground to

insure that you are properly grounded while you work.

4. Use a #2 Phillips screwdriver to remove the six screws

(four on top, two along the back top edge) from the lid

of the Model 2090 case. Slide the lid to the back of the

Model 2090 to remove it.

5. Remove the three batteries and insure that the battery

holder and contacts are clean and dry. Refer to the

figure below to identify the location of various

components on the Model 2090 main board. A

“supercap” capacitor will normally maintain parameter

settings for several minutes while the batteries are

replaced.

6. Install three new 1.5V “AAA” alkaline batteries (type

EN92 or equivalent), taking care to observe the polarity

markings in the battery holder. Do not mix old and new

batteries, or types of batteries. Use only alkaline

batteries. Failure to follow these directions may void

the warranty.

WARRANTY

7. Slide the lid on from the back of the Model 2090 and

replace the six mounting screws.

NOTE: The four mounting screws on the lid may be

different than the two on the back.

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Revision G– P# 399199