Specifications

13-6. Control for Abnormally Low T/C

Any of the following faulty conditions occurring during a copy cycle could

cause a steep drop in T/C, resulting in image trouble and carrier

scattering. When ATDC Sensor UN8 detects an abnormally low T/C due

to any of these reasons during a copy cycle, the self recovery function of

the copier interrupts the current copy cycle to replenish the supply of

toner temporarily.

➀

Defective Sub Hopper Toner Replenishing Motor M15

➁

Plugged toner supply path

➂

Defective Sub Hopper Toner Empty Switch S8

➃

A large number of copies are made from originals with image density

higher than the specifications.

•

If the T/C detected by UN8 is lower than the "T/C control level set by

AIDC Sensor control" by 2% or more, the copier determines that the T/C

is abnormally low.

•

An abnormally low T/C is not detected, however, when a toner-empty

condition has been detected or UN8 found faulty.

If an abnormally low T/C is detected, the paper take-up motion will be

brought to an immediate stop and M15 is energized to replenish the supply

of toner.

M-78