Develop QC 2235 Plus, Руководство по обслуживанию

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QC 2235plus Theory of Operation Ver.1.0 Mar. 2004 Fusing section
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16.3.5 Detection of a New Fusing Unit
• When a new Fusing Unit is installed in the machine, the life counter is automatically
cleared through the machine’s capability of detecting a new Fusing Unit.
• The new unit is detected when the Power Switch is turned ON or the Right Door is
opened and closed.
16.3.6 PPM control
• PPM (printed pages/min.) control is provided to ensure the condition of one power outlet
for one system and, at the same time, good fusing performance during continuous paper
feeding.
• Only the Heating Roller Heater Lamp is preferentially turned ON during a print cycle. In a
continuous print cycle, therefore, the surface temperatures of the Heating Roller and
Fusing Pressure Roller decrease, resulting in the fusing performance of the printed
image being degraded. Fusing performance is therefore estimated based on the surface
temperature of the Pressure Roller. The printed pages/min value is decreased according
to the paper length and system speed, thereby achieving the intended level of fusing per-
formance of the printed images (toner).
A. Plain paper
• When the surface temperature of the Fusing Pressure Roller is a predetermined temper-
ature or less for 10 sec. during a print cycle with the machine interior temperature at 18
°
C or less, PPM (printed pages/min) is decreased.
B. Color OHP
• Different types of PPM control are provided according to the mode, regardless of the
interior temperature or the Pressure Roller surface temperature during the print cycle.
• The control does not cover the monochrome mode and any paper size other than A4 and
Letter.
*1: PPM control is provided only when OHP transparencies are fed through the machine for
OHP + OHP Interleave.
System Speed Paper Length (mm)
Printed pages/min (PPM) when the Fusing Pressure Roller
temperature is decreased
Standard tempera-
ture
115
°
C or less 110
°
C or less
165 mm/sec
Color print
216 or less 35 28 20
217 to 297 inclusive 26 20.3 14.5
298 to 381 inclusive 21 15.8 11.3
100 mm/sec
Monochrome
print
216 or less 22 22 20
217 to 297 inclusive 17 17 14.5
298 to 381 inclusive 13
13
11.3
382 or more 11
11
9.4
Mode Printed pages/min (PPM) of A4 and Letter
OHP continuous paper feed mode 8
OHP + OHP Interleave mode *1 5