Epson Stylus Photo 950, Service Manual

Page: 79 / 191

EPSON Stylus PHOTO 950 Revision A
TROUBLESHOOTING Overview 79
3.1.6 Isolating the Faulty Part according to the Phenomenon
Refer to this section if you could not solve the problem in Section 3.1.4 or Section
3.1.5 or need more information to isolate the cause according to the exhibited
phenomenon.
In models which use a DC motor, even if a problem occurs in the printer mechanism,
the motor will keep operating if the current is within the rated level and no problem
will be detected. The result of this is that the motor can keep operating without a fatal
error being detected and without any mechanism problem being detected, so that a
large amount of noise was produced. This section lists surface problems that occurred
during inspections at the prototype stage and which might be considered to occur in the
marketplace also.
Table 3-14. Troubleshooting for surface problems
Step Surface problem Reference page
1 [PF Motor Driver Abnormal 1]
PF motor rotary encoder feeds paper at high speed in
an unexpected manner that is different from normal
operation, or paper jams always occur around the
hopper.
Refer to Section 3.1.6.1.
2 [ASF Driver Abnormal 1]
The PF motor operates normally, but the ASF is not
being driven. (Paper is not being fed.)
Refer to Section 3.1.6.2.
3 [Unexpected Ink Out (Cartridge Out) Error]
Dot dropout appears to be happening a lot, and then
suddenly an Ink Out indication appears. However, the
ink cartridges are almost new or are still quite full.
Refer to Section 3.1.6.3.
4 [PF Motor Driver Abnormal 2]
Noise occurs around the PF motor each time the PF
motor operates.
Refer to Section 3.1.6.4.
5 [Carriage Operation Abnormal]
When the power is turned on, the carriage appears to
move slightly, but then a fatal error occurs. (The fatal
error always occurs at the same place.)
Refer to Section 3.1.6.5.
6 [Dot Missing 1]
The carriage operates normally, but printing is not
possible at all.
Refer to Section 3.1.6.6.
7 [Dot Missing 2]
Specific nozzles are always missing or give an
alignment failure even though cleaning is carried out.
Refer to Section 3.1.6.7.
8 [Dot Missing 3]
All nozzles are firing, but printing is unstable.
Refer to Section 3.1.6.8.
9 [ASF Driver Abnormal 2]
The LD roller shaft inside the ASF rotates normally
when the PF motor operates, but the paper cannot be
fed properly, or a large amount of noise is heard.
Refer to Section 3.1.6.9.
10 [CR Motor Operation Abnormal]
A printer which has performed well up until a certain
time suddenly changes in printing speed so that
printing time becomes much longer.
Refer to Section 3.1.6.10.
Table 3-14. Troubleshooting for surface problems
Step Surface problem Reference page