Oki ES9160 Maintenance Manual page 174

(3) Release 1 hook and then take off the filter
cover.
(4) Take off the ozone filter.
4.7.13 TRU fan (M9)
(1) Take off the transfer unit
( P. 4-63 "4.7.17 Transfer unit").
(2) Remove 1 screw and then take off the
terminal on the rear side.
ES9160 MFP / ES9170 MFP
DISASSEMBLY AND REPLACEMENT
Fig. 4-165
Fig. 4-166
Terminal
Fig. 4-167
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Filter cover
Ozone filter