Epson EPL-5900 Service Manual page 91

EPSON EPL-5900/EPL-5900L
At 600 dpi
When the power switch is turned ON, the printer performs initialization, warm-up
starts, and the heater lamp turns on. Then, the following temperature controls are
performed.
Temperature control mode 1
This mode keeps temperature at 195°C during printing and at 115°C during
standby. After continuance of this mode for 90 seconds, the printer enters the
mode 2.
Temperature control mode 2
After continuance of this mode for 208 seconds, the printer enters the mode 3.
Printing temperature of the fusing roller gradually lowers from 195°C to
185°C.
Temperature control mode 3
Keeps temperature at 185°C during printing and at 115°C during standby.
Unless any errors are generated or the upper cover is opened, the printer is
kept in this mode.
At 1200 dpi
When the power switch is turned ON, the printer performs initialization, warm-up
starts, and the heater lamp turns on. The heater lamp stays ON until the
temperature of the heat roller reaches about 155°C. Then, the following
temperature controls are performed.
Temperature control mode 1
Keeps temperature at 155°C during printing and at 115°C during standby.
After continuance of this mode for 90 seconds, the printer enters the mode 2.
Temperature control mode 2
After continuance of this mode for 208 seconds, the printer enters the mode 3.
Printing temperature of the fusing roller gradually lowers from 155°C to
150°C.
Temperature control mode 3
Keeps temperature at 150°C during printing and at 115°C during standby.
Unless any errors are generated or the upper cover is opened, the printer is
kept in this mode.
Operating Principles
Warming Up
195°C
185°C
155°C
150°C
115°C
Condition before
interruption of temperature
control
Mode 1, during warm-up
Mode 2, 3, or when power
supply OFF
Description of Mechanisms
Thermistor Detected Temperature
Mode 1: 90 sec. Mode 2: 208 sec.
Figure 2-18. Heat Roller Temperature Control
Table 2-8. Heat Roller Temperature Control
Temperature just after starting of temperature control
50°C or above and below
Below 50°C
115°C
Mode 1
Mode 1 Mode 2
Temperature just after starting of temperature control
Revision B
During Printing
(600dpi)
During Printing
(1200dpi)
During Standby
Mode 3
115°C or above
Mode3
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