Epson EPL-N4000 Service Manual page 100

EPSON EPL-N4000/EPL-N4000+


Output to motors, solenoids, and other components.
After comparing input values with timing and reference values, the
MCU makes a decision on the current status of the printer, and
responds appropriately. The MCU may switch on or off motors,
solenoids, or other components. The MCU may also signal that an
error occurred.

Example below:
A the start of a print cycle, the MCU switches on the Main Drive
Motor, and then the Feed Clutch. The MCU uses the Feed
Clutch actuation as a timing marker. The Feed Rolls attached to
the Feed Clutch drive a sheet of paper out of the paper tray and
down the paper path. As the sheet of paper travels down the
paper path it strikes the Registration Sensor. The Sensor sends
a signal to the MCU PWB telling it that the paper has arrived.
The MCU takes the elapsed time from when it actuated the Feed
Clutch to the time it received the signal from the Registration
Sensor and compares that time with the set time (or expected
time) that is stored in ROM on the MCU PWB. If the time
elapsed is within range, the print cycle continues. If the time
elapsed is slower than the set time or if there was no signal from
the Registration Sensor within the set time, the MCU interprets
that as an error and sends an E1-1 Misfeed Jam status to the
C262 Main Board.
Rev.B
Figure 2-46. Output to Motor, Solenoid and Other Components
Chapter 2 Operating Principles
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