Panasonic PT-DW10000E

(6) Unscrew each of 1 screw and release 4 lamp unit terminals in
total of the 4 ballasts.
(7) Unscrew the 2 screws and remove the dynamic iris cover.
(8) Unscrew the 3 screws and remove the iris unit.
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PT-D10000U / PT-D10000E / PT-DW10000U / PT-DW10000E