Toner End Detection - Ricoh J-P2 Service Manual

17 January, 2003

Toner End Detection

The machine flags the toner end status when one
of the conditions below is detected for a toner
color. The message, "Add Toner Xxxxx", is
displayed; where "Xxxxx" indicates the color,
such as cyan.
• V
+ 0.5 V < V
REF
• The pixel counter counts up the equivalent of 5 A4 sheets of pixels (100%
coverage) since near-end was detected.
However, if fewer pages have been made since near-end than the number
guaranteed with SP 2-212-11 (default: 10 pages), printing will continue.
NOTE: If one of the following conditions is detected 10 consecutive times, the
machine flags a "toner end condition" regardless of the number of pages
printed since near-end.
• V
+ 1.2 V < V
REF
• V
> 4.8 V
T
After the machine detects toner end for black, it cannot print until the toner
cartridge is replaced. If cyan, magenta, or yellow are in a toner end condition
during standby mode, the machine can print with black and white only; color
printing is disabled.
NOTE: If the yellow, cyan, or magenta toner ends during a color printing job, the
job is suspended until toner is supplied. If new color toner is not installed,
the user can print black-and-white jobs but not color jobs.
Toner End Recovery
The machine assumes that the toner cartridge has been replaced if either of the
following occurs when the near-end or end status exists:
• The upper right cover is opened and closed.
• The main switch is turned off and on.
The machine then starts to supply toner to the development unit. After supplying
toner, the machine clears the toner near-end or end status if the following
conditions are detected.
• Vt [0] – Vt [3] > 0.5V
• Vt – Vref > 0.3V
(ten times consecutively)
T
T
6-19
PROCESS CONTROL
Add Toner
Cyan
G080D916.WMF