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Servicing
PMT High Voltage Power Supply Replacement
7-18
Model 43i Trace Level-Enhanced Instruction Manual
1. Turn instrument OFF, unplug the power cord, and remove the cover.
2. Disconnect the two PMT high voltage supply cables.
3. Loosen the two retaining screws securing the power supply bracket to
the floor plate and slide the power supply towards the rear slightly and
lift it off the base screws.
Input Box Assembly
Figure 7–10. Replacing the PMT High Voltage Power Supply (HVPS)
4. Loosen two screws on the input box assembly and lift the input box
assembly off the bracket.
5. Remove the four screws securing the power supply to the bracket and
remove the power supply.
6. To install the power supply, follow the previous steps in reverse.
7. Recalibrate the instrument. Refer to the calibration procedures in the
"Calibration" chapter.
Assembly Bracket
HVPS
Input Box Screws (2)
Assembly Bracket Screws (3)
Thermo Fisher Scientific
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Troubleshooting
