Servicing
PMT High Voltage Power Supply Replacement
Thermo Electron Corporation Model 42i Low Source Instruction Manual 7-17
PMT high voltage power supply
Nut driver, 1/4-inch
Philips screwdriver
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 assembly bracket to the
floor plate and slide the assembly towards the rear slightly and lift it off
the base screws.
Figure 7-10. Replacing the PMT HVPS
4. Loosen two screws on the input box assembly and lift the input box
assembly off the power supply.
Equipment Damage Some internal components can be damaged by small
amounts of static electricity. A properly grounded antistatic wrist strap must
be worn while handling any internal component.
Assembly Bracket
Input Box Screws (2)
Assembly Bracket Screws (2)
Input Box Assembly
HVPS
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