Panasonic PT-D3500U

(3) Unscrew the 2 screws and remove the lamp duct.
(4) Unscrew the 1 screw and remove the thermofuse attachment.
(5) Loosen the 1 screw until it idles, then open the lamp unit cover.
(6) Loosen the 2 screws fixing the lamp unit until they idle, hold the
handles and take the lamp unit out.
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PT-D3500U / PT-D3500E