Ricoh Robin Service Manual page 42

24 June 1994
– A151 copier –
Since this model has only two modes for the erase lamp, full erase mode (all
blocks on) and toner density detection cycle mode (all blocks on except block
"g"), side erasing is not performed by the erase lamp.
When making copies with the platen cover open condition, and the original
and the copy paper is smaller than B4 (10" x 14"), the part without the original
will be developed as black image area on the drum.
NOTE: If the customers makes copies without the platen cover closed
frequently, the used toner tank may become full in a faster period
than expected. For those customers, the toner tank must be checked
and cleaned frequently.
4.1.3 Trailing Edge Erase
The entire line of LEDs turns on after the trailing edge of the latent image has
passed. Therefore, a trailing erase margin cannot be observed on the copy.
The LEDs stay on to erase the leading edge of the latent image in the next
copy cycle. After the final copy, the erase lamps turn off at the same time as
the main motor.
2-23
ERASE