Removing Covers 2
Maintaining Your GC 21
To Remove the Electronics Cover
You may need to remove the electronics cover to perform NPD
maintenance. The steps required depend on whether or not an
FPD
+
is installed.
Without FPD
+
/FPD installed:
1 Raise or remove the detector top cover.
2 Remove the side cover.
3 Remove the screw on the left side of the electronics cover.
4 Loosen the screw on the back of the electronics cover.
5 Remove the cover.
With FPD
+
/FPD installed:
1 Raise or remove the detector top cover.
2 Remove the PMT tube. See To Change the FPD
+ Wavelength Filter
or To Change the FPD Wavelength Filter as applicable.
3 Remove the heat shield (the metal “bracket” below the PMT
tube) by removing the four screws that secure it to the front
bracket/support.
4 Remove the side cover.
5 Remove the screw on the left side of the electronics cover.
6 Loosen the screw on the back of the electronics cover.
7 Remove the cover.
CAUTION
Raising the electronics cover exposes the GC electronics.
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