Ricoh FT7770 Service Manual page 180

12. Open the top unit [A], and remove the drum cover [B] (2 screws).
13. Remove the drum stay [C] by turning the knob counterclockwise.
14. Disconnect the charge corona wire cleaner connector [D] and remove the
charge corona unit [E].
15. Pull out the erase unit [F] and the drum thermistor [G].
16. Disconnect the pre-quenching corona connector [H], and remove the
quenching lamp unit [I].
17. Remove the cleaning unit [J].
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30 April, '89