Panasonic DPC264

[ATSBMCO]

I replaced the powdered developer in the developer unit K but the machine will not let me reset the count.
The copy quality is perfect, but I'm a bit worried that the developer powder isn't set correctly and may fail prematurely.

Thanks

[subaro]

<Resetting the PM Counters>
Note:
1. Do not close the Front Cover.
2. If replacing the Developer Unit, follow step (52).
3. If replacing only the Developer, skip to step (53).
(52) Perform "F8-09 Deve. Unit Count".
(F7-02-40, 41, 42, 43 Deve. Unit Count, and F7-
02-45, 46, 47, 48 are also initialized by this
operation)
(53) Perform "F8-11 Developer Count".
(F7-02-45, 46, 47, 48 are also initialized by this
operation)
(54) Plug the AC Power Cord.
(55) Turn the Main Power Switch on the Back, and
the Power Switch on the Left Side of the
machine to the ON position.
(56) Close the Front Cover.