GAI-Tronics 10108-008 Field Maintenance Bulletin: Handset/Cord Replacement Procedure for Model 780 & 7805 Series Div. 1 Hazardous Area Stations - Manual (Page 2)

Pub. 42006-011E
M ODEL 780 AND 7805 S ERIES D IV . 1 H AZARDOUS A REA H ANDSET /C ORD R EPLACEMENT Page 2 of 3
e:\standard ioms - current release\42006 field maint bulletins\42006-011e.doc
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Procedure
WARNING
Disconnect power before making any repairs to a hazardous area station.
N OTE : The internal outer edge of the front cover is machined. Take precautions to ensure that the finish
is preserved. If damaged, the explosion-proof integrity can be lost.
Figure 1. Replacement Handset with Cord and Amplifier Assembly
1. Turn off power.
2. Remove the 14 bolts (Ref. 1 typ.) from the front cover (Ref. 2) using a socket or a combination
wrench.
3. Lift off the front cover, and disconnect the flat ribbon cable (Ref. 3).
4. Remove the four screws (Ref. 4) that hold the amplifier assembly (Ref. 5) to the front cover (Ref. 2).