General Care, Troubleshooting and Service
6-7
Figure 6-6
The Charger Needle
9. Use a fine-tipped pair of tweezers, to gently grab the contaminated
needle and draw the tweezers up, using care not to bend the needle as
you do so.
Do not use solvents to clean the needle.
If the needle
bends, use the tweezers to straighten it. The needle must be as straight
and centered in the ground cup as possible.
10. After you have removed the collected material, reassemble the
instrument and run a test to check operation. If you get another error
message (or if the needle breaks while cleaning it), replace the needle
as described in the following section.
Replace the Negative Charger Needle
To replace the charger needle, proceed as follows:
Note:
Make sure your hands are clean so grease or oil does not get on
the grounding cup or the insulator. You may want to wear
examination gloves.
1. Follow steps 1 through 6 of the cleaning procedure, then...
2. Unscrew the ground cup (Figure 6-6) and set it aside for cleaning and
reassembly. No tools should be needed to remove it.
3. Unscrew the white cone tip (the insulator with the charger needle
attached). A tweezers or pliers may be used to hold the flange with
holes to keep it from turning (see Figure 6-7).
