Epson Stylus Photo 950, Service Manual

Page: 67 / 191

EPSON Stylus PHOTO 950 Revision A
TROUBLESHOOTING Overview 67
6 Is the FFC disconnected
from connector CN1 on
the circuit board
underneath the carriage,
or does it look to be
okay but when you try
to push it in does it feel
as if it is slightly loose?
CN1 is the connector that handles the input and output of
signals between the main board and the mechanism. It
inputs the various encoder signals to the main board from
the mechanism, and outputs head drive signals from the
main board
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 Remedy
Junction Board
CN1
7 Is CN9 on the main
board is disconnected or
almost disconnected? Even though it is the same FFC, signals indicating the
cartridge installation condition are not input to CN10.
NOTE: If CN9 and CN10 are inserted at an angle or if they
are almost disconnected from the connector, there
is a high possibility that direct damage to the head
may occur, and in the worst case, the head driving
transistors (Q12 and Q13) on the main board and
the printhead itself may become damaged. Because
of this, handle the FFC very carefully while
working.
When CN10 is disconnected and then reconnected
and the power is turned back on, the fatal error is
cleared, but if CN9 is disconnected, and the power
is then turned back on, an unexpected Ink Out
indication will appear and all of the currently-
installed ink cartridges must be replaced. This is
because CN9 includes the signal that is used to
monitor the internal head temperatures, so that if
CN9 is disconnected the voltage becomes 0 V, or in
other words an abnormal temperature has been
detected. Accordingly, the power should not be
turned on while CN9 is disconnected in order to
avoid wastage of the ink cartridges.
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 Remedy
CN9
CN10