Operation; Print Unit Life Detection; Print Unit Life Control - Konica Minolta magicolor 5550 Service Manual

9. Print unit section (overall composition)
9.2

Operation

9.2.1

Print unit life detection

• Based on the photo conductor driving time, the cartridge life is determined.
• When the photo conductor driving time reaches its near life, the near life warning mes-
sage appears.
• The main body is designed to indicate a near life condition when the life remaining in the
print unit becomes 40 percent of the total 30,000 sheets after approx. 18,000 sheets
have been printed.
* for a standard original of a 5% coverage rate
• Approx. 12,000 pages can be printed at 5 % coverage with use of standard originals dur-
ing the period of time that begins when a near-life condition is detected and ends when a
life condition is detected.
• The near life display function can be disabled through System menu/Warning detection/I-
unit near life. (Initial setting: Display)
• When the photo conductor driving time reaches its life time, the life warning message
appears.
Display example:
Print unit near life indication (Magenta)
READY
I-UNIT LOW
M
for help
• If the photo conductor runs more than its life, a life end warning message appears. When
the warning message appears, you cannot print.
• The life end message can be reset when the print unit is replaced.
Display example:
Print unit life end indication (Magenta)
(Print jobs waiting to be printed)
READY
I-UNIT END
M
for help
9.2.2

Print unit life control

• Each print unit is provided with a PU detection board that detects state of a toner car-
tridge placement, a new PU, a print unit life.
• The main body attempts to perform a detection sequence when the front door is closed.
• When a cartridge is detected as a new one, an image stabilization sequence starts.
24
Theory of operation Ver. 1.0 Nov. 2006
Display example:
Print unit life indication (Magenta)
READY
I-UNIT LIFE
M
for help
YMCK
A011T2E073DA
Display example:
Print unit life end indication (Magenta)
(Receiving a print job)
I-UNIT END
REPLACE
M
for help
YMCK
A011T2E075DA
YMCK
A011T2E074DA
YMCK
A011T2E076DA