Photomultiplier Tube (Pmt) Replacement; Figure 7-39. Pmt Tube Replace-Elec-Pt1 - Thermo Scientific 42iQHL Instruction Manual

Servicing
DMC PMT Cooler and Reaction Chamber Replacement
Photomultiplier
Tube (PMT)
Replacement
7-38 42iQHL Instruction Manual
Use the following to replace the photomultiplier tube (PMT).
Equipment Required:
Screwdriver, flat head
Phillips drive, #2
1. Turn the instrument OFF, unplug the power cord, and remove the
cover (Figure 2–1).
2. Unplug electrical connections PMT (J7) and HVPS (J4).
Figure 7–39. PMT Tube Replace-Elec-Pt1
3. Using a flat head screwdriver, wedge out of top right corner starting
point, labeled 1 (Figure
4. Continue to wedge out the four midpoints of the plate to remove the
snap on access panel, labeled 2
7–40).
(Figure 7–41).
Thermo Scientific