Thermo Scientific Micro-Tech 9101, Reference Manual

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Maintenance and Troubleshooting
Opto22 Problems
4-16 Micro-Tech 9101/9201 Reference Manual, Rev J Thermo Fisher Scientific

If GOOD—Proceed to “View Opto LED” (see step 4).

If BAD—Replace fuse.
4. View Opto22 LED. By forcing the output open and closed, does the
LED indicate the appropriate logic condition?

If GOOD—Replace the Opto22 output module.

If BAD—Replace either the Opto22 output module or the Micro-
Tech CPU board.
Figure 4–10. Opto22 Troubleshooting—Output Module