XV-Z91E (serv.man34). Software correction of picture position in 576P signal, horizontal keystone function picture roll in game console connection - Sharp Projector Technical Bulletin (repair manual). Page 6

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Sharp Electronics (UK) Ltd., Technical Services Group
3-(10) When upgrade is completed “Cancel” is changed to “Flash”.
3-(11)  Unplug the projector’s AC cord and RS-232C cable. Then plug the AC cord
again and turn the projector on.
4. Set the parameters again.
4-(1)  Enter into the factory adjustment menu. Choose “VERSION” – “RomCode”
and confirm it is “4.4”.
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