Power-On Power-On Sequence Sequence - Epson ET-4550 Service Manual

E E p p s s o o n n E E T T - - 4 4 5 5 5 5 0 0 , , L L 6 6
1.2 Power-On 1.2 Power-On Sequence
This section describes the power-on sequences for this product. The preconditions are as This section describes the
 
Power-on sequence (See Power-on sequence (See Table 1-1
 
Turning on the printer after turning it off without an error. Turning on the printer after turning it off without an error.
 
The power was turned off normally at the previous shut down. The power was turned off normally at the previous shut down.
 
Initial ink charge has finished and every ink tank has sufficient ink. Initial ink charge has finished and every ink tank has sufficient ink.
 
No paper on the paper path. No paper on the paper path.
 
The Printhead is capped by the cap of the Ink System and the CR Lock is engaged normally. The Printhead is capped by the cap of the Ink System and the CR Lock is engaged normally.
1. 1. Print Printhead head initi initializat
1-1.Initializes the Printhead. 1-1.Initializes the Printhead.
2. 2. Mainte Maintenance nance error
2-1.Checks the tube maintenance counter for ink tube errors. 2-1.Checks the tube maintenance counter for ink tube errors.
2-2.Checks the waste ink counter if the waste ink overflow is occurring. 2-2.Checks the waste ink counter if the waste ink overflow is occurring.
3. 3. Rele Releasi asing the C ng the CR lock
3-1.The PF Motor rotates clockwise, and releases the CR lock. 3-1.The PF Motor rotates clockwise, and releases the CR lock.
4. 4. Seekin Seeking the g the home
4-1.The CR Unit moves to the 0-digit side slowly and confirms it touches the Right Frame. 4-1.The CR Unit moves to the 0-digit side slowly and confirms it touches the Right Frame.
4-2.By regarding the position where the CR Unit touches the Right Frame as the specified distance from the origin, the 4-2.By regarding the position where the CR Unit touches the Right Frame as the specified distance from the origin, the
home position is determined. Thereafter, the position of the CR Unit is monitored based on the information home position is determined. Thereafter, the position of the CR Unit is monitored based on the information
provided by the CR Encoder Sensor. provided by the CR Encoder Sensor.
5 5 5 5 / / 6 6 5 5 6 6
Sequence
power-on sequences for this product. The preconditions are as follows.
Table 1-1.) .)
Table 1-1. Tabl
*3 *3
alization ion
error detect detection ion
R lock
home posit position ion
e 1-1. Norm Normal Pow al Power-on S er-on Seque
* * 1 1
Operation Operation
follows.
equence nce
movement and position movement and position
   
   
   
   
R R e e v v i i s s i i o o n n B B
CR Unit/PF Roller CR Unit/PF Roller
*2 *2
   
   
     
     
     
     