Refresh Operation; Standby Operation; Fail Absorbing Operation - Epson 4003353 Service Manual

2.4.1.6 Refresh Operation

the RFSH signal that occurs automatically every 2 seconds (blackhead) or 7 seconds (color head).
If 3 seconds elapses after an RFSH signal, this operation is performed immediately. Also, if
10 seconds elapses, the printer enters the standby mode.
1. Moves the carriage to the flushing position. (If only the black head is being flushed, moves the
black head on the color cap position.)
2. The blackhead performs the flushing operation in accordance with excess time from before
refresh operation, and color head performs the 12-pulse flushing operation.
3. If the value of ink counter R or if the timer of fail absorption is over the setting value, performs
the fail absorbing operation when the next paper ejecting operation is completed.
4. Returns to the previous operation.

Standby Operation

2.4.1.7
This operation prevents an increase in the viscosity of the head ink. It is performed automatically if
no data is received for more than three seconds.
Moves the carnage to the flushing position.
1.
2. Counts the number of the flushing operations from the last standby operation, using the
combined print counter N, and perfbrms the flushing based on this counter value.
3. Moves the carriage to the home position.
4. If paper is not loaded, sets the carriage lock. To ensure the paper feed precision, the carriage
lock is not perfbrmed if paper is loaded.
5.
Waits for print data. (Depending on the value of ink counter R, the fail absorption might be
performed at this time.)

2.4.1.8 Fail Absorbing Operation

This operation absorbs ink inside the cap, and eliminates
patterns in this operation.
After performing the ink absorption:
1. Moves the carriage to the fail absorption position.
2. Performs the fail absorbing operation fix the black or col~r &p.
Moves the carriage to the flushing position..
4. Performs the fail absorption for the other cap. . ~ ~ €
If the pump motor rotated CCW in step 4, resets the wiper; this step is not necessary
5.
if the pump motor rotated CW.
6. Releases
7. Releases the D/E lever.
8. Moves the carriage to the home position.
Fixed time fail absorbing:
1. Moves the carriage to the flushing position.
2. Performs the ink absorbing operation inside the black cap.
3. Performs the ink absorbing operation inside the color cap. . ~&•Œ˜D•Œ(
4. Releases the pump unit.
5. Moves the carriage to the home position.
Rev. A
the pump unit.
Operating Principles
the' ink of the nozzle plate. There are two
. .
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