Epson Stylus Photo 950, Руководство по обслуживанию

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EPSON Stylus PHOTO 950 Revision A
TROUBLESHOOTING Overview 82
3.1.6.4 PF Motor Driver Abnormal 2
This section describes the procedures for solving the problem when no error occurs,
but only the PF motor operates at high speed all the time even though this has not
happened before. The PF motor is different from the carriage motor in that it does not
generate a fatal error even if the rotary encoder cannot read at all, so that the firmware
checks the bar code signal on the rotary encoder and continues providing current to the
PF motor, causing it to operate at high speed. The methods of solving this problem are
given below in order starting from the easiest, so refer to them for the checking and
working procedures.
3 To prevent this from happening, the Stylus COLOR 900/980 detected the
temperature at each color nozzle, and if more than half of the nozzles in a
nozzle line become blocked, and if printing is continuing, then the data
for this rise in temperature caused by this abnormal condition was
detected, causing the following sequence to occur.
1. Abnormal temperature is detected. (At this time the actual temperature
inside the head is approximately 100
°
C.)
2. Printing of the current character data is momentarily stopped.
3. After this, cleaning (CL1) starts automatically.
4. Printing of the current character data resumes. If no abnormal
temperature is detected after this and the power is then turned off, the
history data indicating that an abnormal temperature was detected is
cleared.
5. If printing is carried out again (before the power is turned off), and if a
high temperature is detected again at this time, it is judged that the ink
cartridges in the printer are completely empty and Ink End is set.
4 The Stylus PHOTO 950 have the same function written into their
firmware, but the following points are completely different to those for
the Stylus COLOR 900/980.
When an abnormal temperature is detected, an Ink Out condition is
immediately set, and the ink consumption counters for the currently-
installed ink cartridges are set to 100%, so that the only way to reset the
problem is to install new ink cartridges.
The reasons for changing the sequence in this way are as follows.
1. Actual market results show that problems related to heat hot errors and
customer confusion never occurred.
2. Points to note during head replacement were strictly observed by
Epson subsidiaries and their partners, and so no repair problems ever
occurred.
3. The Stylus COLOR 900/980 used conventional ink cartridges which
were not of a CSIC type, so that the amount of ink actually remaining
in ink cartridges and the amount of ink remaining as understood by the
printer firmware was liable to cause counter mismatches due to
incorrect operations carried out by customers, but with this product the
cartridges can be installed and removed freely.
5 Accordingly, the occurrence of head hot errors is extremely rare in the
new models, and basically the only problem that can be expected is
counter mismatches due to refilling.
Table 3-17. Unexpected Ink Out Error 1 (During Print Operation)
Explanation step Unexpected Ink Out Error 1 (During Print Operation)
Table 3-18. PF Motor Driver Abnormal 2
Step Check Point Remedy
1 Is the belt tension
appropriate (is it
not too loose)
even though the
PF motor operates
normally? If the belt tension cannot be checked to see if it is normal just by
touching it, reset the belt tension by the following procedure.
1. Remove the tension spring that is attached to the screw
securing the PF motor.
2. Loosen the two screws that are securing the PF motor.
(They do not need to be removed.)
3. Remove the timing belt from the pinion gear.
4. Set the timing belt onto the pinion gear.
5. Attach the tension spring to one of the screws securing the PF
motor.
6. Tighten the screw which was attached to the spring in the step
above.
7. Tighten the other screw.
Tension Spring Timing Belt
PF Motor Pinion
2 Screws