Epson Stylus Pro 7890 Series, Service Manual, Page: 146 / 519

Epson Stylus Pro 7700/7710/7700M/7710M/7900/7910/9700/9710/9900/9910/WT7900/WT7910/9890/9908/7890/7908 Revision I
TROUBLE SHOOTING Remedies for Service Call Error 146
Confidential
1A37 Printhead Thermistor error
The Head FFC is not connected correctly. Check the connection of the Head FFC, and if there is abnormality
(slant connection or the like), correct it.
The thermistor detects a temperature out of the specification. Replace the Printhead. (See P.270)
The thermistor is broken.
1A41 Printhead
Head rank ID input
error The information of the Head rank ID is wrong. Configure the Head rank ID again. (See P.374)
1427
CSIC
CSIC destination
setting error
An Ink Cartridge for a wrong destination has been installed. Replace the Ink Cartridge with a correct one for this printer.
The Ink Holder is not adjusted correctly. Start the printer in the Serviceman Mode without setting the ink
cartridge, and then execute “Ink Holder Adjustment” from the Service
Program.
(See P.426)
1428 CSIC
Ink Holder
adjustment error
The adjustment statuses of the Ink Holder on the left and on the right are
not the same.
*This service call error does not occur for Epson Stylus Pro 7700/7710
/9700/9710.
1. While opening the cover of the Ink Holder (to avoid a service call
error from occurring), start the printer in the Serviceman Mode.
2. Execute “Ink Holder Adjustment” from the Service Program. (See
P.426)
1A23
RTC
Incorrect RTC data
error
The value information on various absolute time stored on NVRAM is
abnormal. Check if the RTC backup battery is installed properly.
Replace the Main Board Assy.
(See P.228)
1A26 RTC
RTC Access T/O
error
The RTC circuit on the Main Board Assy malfunctions. 1. Turn the power off and remove the RTC backup battery.
2. After several seconds, re-attach the battery and turn the power back
on.
3. If the printer recovers from the error, set the date and time using the
Service Program.
1A38
Hardware
Transistor
environmental
temperature error The transistor has a defect. Replace the Printhead. (See P.270)
The thermistor detects a temperature out of the specification.
1A39 Hardware Head error
The drive circuit in the Printhead is damaged due to a slant connection
of the Head FFC, etc., or the fuse of the Main Board Assy may has
blown because of such a wrong connection. 1. Check the connection of the Head FFC to the Sub Board Assy, and
correct it if there is a slant connection or the cable is disconnected. If
any connection terminal of the Head FFC is damaged, replace it with
a new one.
2. Replace the Printhead. (See P.270)
3. If the printer does not recover from the error after trying 1 and 2.,
replace the Main Board Assy. (See P.228) (The fuse of the Main
Board Assy may have blown due to a slant connection of the Head
FFC.)
1A40
Hardware IC22 error The destination is wrong. Configure the destination again.
Error Code
Error Details
Description Remedy
Failed Part Error Name