konica copier 1120

[weiyin]

the mechina has a error : p27.
Pls, I want to know what does it mean?
and check where?

thanks lots.

[Luther]

Check that the toner density sensor is plugged in(connector on developer unit) or the pm light was reset without running developer adjustment, this happened on early serial number machines later machines went to and f-26,hope this helps