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       CODE: 725.381-010 Buy the DOT:Download/CD-ROM
TITLE(s): TUBE REBUILDER (electron. comp.) alternate titles: television-picture-tube rebuilder
Rebuilds cathode ray tubes used in television receivers and display instruments according to
specifications, applying knowledge of electronics: Inspects tube for physical defects, such as
cracks, scratches, burns, and pits to determine if tube is repairable. Tests display function, such
as horizontal fade, color purity, and convergence to locate cause of malfunction, using test
equipment. Cuts off glass neck holding electron gun, using hot wire or gas torch. Paints dag
(graphite paint) inside bulb to provide conductive surface, using brush. Places bulb and replacement
electron gun in lathe equipped with gas torch to weld and anneal parts together. Operates ovens and
pumps to seal and evacuate tube. Places rebuilt tube in chamber to age (stabilize) tube. Coats
exterior surface of tube with dag, using spray gun. Tests tube function and operation for
conformance to specifications. Buffs and polishes display screen surface to remove scratches, using
power buffer and abrasive compound.
GOE: 05.05.10 STRENGTH: M GED: R4 M3 L4 SVP: 6 DLU: 88
ONET CROSSWALK: 22505A Electronics Engineering Technicians
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