Epson Stylus PHOTO 950 Service Manual page 68

EPSON Stylus PHOTO 950
Table 3-7. This section describes the procedures for solving the problem
when an ink out (cartridge out) error is displayed even
though a brand-new ink cartridge has been installed.
Step Check Point
8 Has a head hot error 1. Install a new ink cartridge and check if the problem
returns to normal. If it does return to normal, the head
occurred?
hot error is probably the fault of the customer. The
approach to head hot errors has changed from the
EPSON Stylus COLOR 980, so that with this printer
there is no way to check the history of whether head hot
errors have occurred or not by checking the specified
address in the EEPROM. The differences in heat hot
errors between this printer and the EPSON Stylus
COLOR 980 are given below.
1.1 The sequence for setting a flag inside the
1.2 Because of the above, automatic cleaning does
1.3 However, if a heat hot error really has occurred,
2. Apart from head hot errors which are the fault of the
customer, there is a danger that these errors can occur as
a result of repair service activity.
2.1. When the head is replaced, the TG value in the
3. In conclusion, the ink cartridges must be replaced in the
case of either item No. 1 and No. 2 above, but for the
service problem in No. 2, use the adjustment program at
the stage before inserting the cartridges to write the head
ID for the currently-installed head to the EEPROM.
TROUBLESHOOTING
Remedy
EEPROM to check if this is the 1st or 2nd
occurrence has been eliminated.
not immediately occur when the first head hot
error occurs.
the ink consumption status is forced to 100% and
an ink out error is displayed so that the current
status of the ink cartridges can be checked.
first digit of the head ID for the circuit board that
is currently installed is ignored, and the power is
turned on with the initial ink cartridges installed.
Table 3-7. This section describes the procedures for solving the problem
when an ink out (cartridge out) error is displayed even
though a brand-new ink cartridge has been installed.
Step Check Point
9 Have the cartridges
been refilled?
10 The data in the ink
cartridge CSIC chip
(EEPROM) is
corrupted.
Overview
Remedy
Because this printer uses a new type of cartridge, traces of
whether the cartridges have been refilled can basically be
checked. The reasons are as follows.
1. In contrast to previous CSICs, there is no ventilation
hole at the top of the cartridge. There is no refill point
like previously.
2. If a syringe is inserted through the film to charge the
inside of the cartridge with ink, a hole is made in the
film, and so the customer must use measures such as
applying tape in order to prevent ink from leaking out.
Of the many items of data stored in the CSIC chips, the
only item that is updated by the printer is the ink
consumption counter. If 100% is written to this address, the
cause will be one of the following two reasons.
1. Corrupt data in the CSIC chip. The cause of this might be
as follows.
1.1 The data was recorded incorrectly when the CSIC
chip was shipped from the factory (data is
randomly corrupted).
1.2 The CSIC chip was shipped without being
initialized for some reason.
1.3 The hand of the customer touched the chip while
charged with static electricity, and this caused the
data in the EEPROM to be randomized, so that
the data became corrupted.
2. A head hot error as described in No. 7 occurred. In such
cases, the data is not randomized as described above,
but the only part of the CSIC data that is changed is the
ink consumption counter. No data in any of the other
addresses is affected.
NOTE:Previous printers which adopted the CSIC and
printers which used DC motors have a sequence
which forcibly changed the consumption status to
100% for currently-installed ink cartridges as a
result of customer error. However, this printer
does not have such a function. Accordingly, CSIC
problems relating to ink life should be analyzed
based on the above points.
Revision A
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