Thermo Scientific Oretronic III, Operating & Service Manual

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Maintaining & Troubleshooting
4-24 Maintaining & Troubleshooting Thermo Fisher Scientific
REC-4105 Rev L
1. Turn on power to the control unit (SW6).
2. If the displays do not light, check power wiring on TB1.
3. If the line voltage setting is not correct for your detector (SW5),
correct it.
4. Turn the power switch (SW6) off.
5. Remove fuse (F1) and test it.
If the fuse tests good, put it back into the fuse holder and continue
with this procedure.
If the fuse tests bad, go to the next procedure.
6. Turn the power switch back on.
7. If the displays do not light, turn the power switch off and test the
fuse again.
8. Check the connectors on the CPU board and the ribbon cable to the
display board for correct mating on boards.
Re-insert any connector that may have come loose during shipping
or installation.
9. Check for coil or junction box damage using the procedures in
“Testing for Coil or Junction Box Damage”.
10. Turn the power switch back on.
the electronics cabinets, power supply cabinets,
control cabinets, or switch boxes.
WARNING
High voltage that may be present on leads could cause
electrical shock.
ƒ All switches must be OFF when checking input AC
electrical connections, removing or inserting printed
circuit boards, or attaching voltmeters to the system.
ƒ
Use extreme caution when testing in, on, or around
the electronics cabinet, PC boards, or modules. There
are voltages in excess of 115 V or 230 V in these
areas.