Model 500T8G18
Rev B
33
4.5 NON-REPAIRABLE
MODULES
The High Voltage Rectifier and Transformer Module (A26258-000), the High Voltage Filter Assembly
(A23044-000), the Grid Modulator Assemblies (A21422-000 and A21422-001), and the Heater Supply
(A27824-000) are encapsulated modules and are not repairable. Contact an authorized service representative
if replacement modules are needed.
4.6 CLEANING
AND
MATING
HIGH VOLTAGE CONNECTORS
The high voltage cable plugs and the mating receptacles on the rear panels need to be treated with care. These
connectors rely on a silicon rubber insulation system that must be clean, void-free, and mechanically
undamaged to perform reliably.
When the cables are separated from the modules, always keep the plugs and receptacles capped with the
protective covers with which they were shipped.
If contamination is suspected, use a low power microscope or 10X magnifier to inspect the connectors
visually. Insure that no dirt particles, lint, cloth fibers, or other foreign materials are present.
If cleaning is needed, it should be performed using a soft-bristled nylon brush or a new acid brush dipped in
isopropyl alcohol. Holding the connector with the mating end down, brush into each contact cavity, allowing
the excess to drip off the insulator. Immediately afterwards, blow the connector dry with with a CFC-free
aerosol duster or with compressed air known to be oil and water free.
CAUTION:
If any oil or water is present in the compressed air, they will leave
residues that are highly likely to result in future failure of the connector.
After cleaning, allow the connectors to air dry at least 30 minutes prior to installing them.
To mate the connectors, align the keyway in the plug with the key in the receptacle shell and insert the plug.
Tighten the knurled lock ring until it is snug. The torque required is approximately 20-30 inch-pounds. Never
operate the system without securely tightening the connectors. To do so will leave voids in the insulation
system, which may break down when high voltage is applied, damaging both the cable and the receptacle.
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