By Lyndon B. Johnson Space Center
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11 JSC-20466 Rev B BATTERY, EMU TV $82-30945 OVERVIEW The extravehicular mobility unit (EMU) TV battery provides the power required to run the EMU TV assembly. battery pack is made up of eight nonrechargeable lithium bromine complex battery cells grouped in two clusters four. The entire battery pack assembly is easily separated from the TV assembly for replacement. OPERATIONAL COMMENTS The EMU TV battery generates a total of 28 V dc for the main TV circuit. There is also a separate in-line tap to direct 14 V dc to the logic circuit of the TV power control module.
___L .... . ' " =.. i:_:::_,_. ' -- ......... ::.!. i_i:. OVERVIEW The transfer bag is a thermally protective bag for carrying tools and hardware used for satellite repair. Necessary equipment such as the spun bypass unit with wire harness and cover, the relay power unit, the relay power unit wire harness, the EVA power tool with battery, the EVA power tool spare battery, and the right angle drive tool or pin straightener are all stowed in individual pockets with flaps. Each pocket has a thermal protection layer and a layer of padding to minimize impact damage.
Bolts requiring a large number of turns should use a Zip nut to reduce EVA overhead. -oz to prevent slippage of manual ratchet mechanisms. The threaded bolt shaft should have a rounded end to assist in hole alignment. The EVA socket standard calls for a 12-point socket and a minimum internal depth to match extended-height bolt heads. This socket also has an internal chamfer to aid in installation alignment. Refer to NSTS-07700, Vol. XIV, appendix 7 for EVA compatible mechanical fastener design requirements.
EVA tools and equipment reference book by Lyndon B. Johnson Space Center
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