Thermo Scientific Micro-Tech 9101 - Page 110

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