Repair Handling Failure; Asf Driver Abnormal 2 - Epson Stylus Color C70 Service Manual

EPSON Stylus COLOR C70/C80

3.1.6.9 Repair Handling Failure

This section describes the procedures for checking when a fatal error occurs when the
power is first turned on after the main board has been replaced. There is one cause for
this.
Table 3-21. Repair Handling Failure
Step Check Point
1 Has the main board for The EEPROMs on each board contain the model name
the Stylus COLOR C80 data. When the power is turned on, the model name data
or C70 been installed by that is stored in the ROM and the EEPROM data are
mistake because the compared and checked, and if the model name is incorrect,
boards have the same the printer develops a fatal error.
name?
NOTE: The unexpected ink out error which can occur when there is a mismatch
between the print head ID and the TG value in the EEPROM on the main
board does not occur when the main board is replaced with a spare part
board. This is because the default value recorded in the main board is
"SHARP", and so the combination of the main board being "EPSON" and
the head being "SHARP" which would otherwise cause an error does not
occur.
Troubleshooting
Remedy
Overview

3.1.6.10 ASF Driver Abnormal 2

This section describes the ASF operation problems mentioned before in more depth.
The ASF problems that were mentioned previously dealt mainly with problems with
the structural parts on the right side of the ASF, but this section covers the procedures
for checking the causes of problems around the clutch mechanism. Most problems that
occur around the clutch mechanism involve noise. Follow the procedures below to
carry out the necessary checks.
Table 3-22. ASF Abnormal 2
Step Check Point
1 Does noise [Abnormal noise during paper feeding]
occur in the
If the noise occurs at the point where the ASF starts operating in the
ASF just as
paper feed direction, carry out the checks in step 16 to step 19 of
the paper is
Section 3.1.4.1 or 3.1.6.2.
being fed?
[Abnormal noise during hopper reset (reverse drive)]
Does noise
1. Check that the change lever for driving the ASF is correctly installed
occur during
to the shaft of the ASF. To check this, refer to the illustrations below.
hopper reset
If the end of the shaft is visible at point A, then it is set correctly. If
when the ASF
the end of the shaft is not visible at point B, the ASF change lever
is driven in
has come loose from the shaft, and it should be pushed back on
the reverse
again. Also check that the torsion spring is not loose or disconnected.
direction to
Explanation: If the ASF change lever comes loose, the stopper function
paper
for the clutch will not work at all, so the LD roller shaft
feeding?
will keep turning but paper will not be fed when required.
Correct Condition
A
Revision A
Remedy
Incorrect Condition
B
Torsion Spring
ASF Change Lever
93