Incorrect Rtc Data Error P146; Rtc Access T/O Error P146; Thermistor Error P146; Transistor Environmental Temperature Error - Epson Stylus Pro 7700 Service Manual

Epson Stylus Pro 7700/7710/7700M/7710M/7900/7910/9700/9710/9900/9910/WT7900/WT7910/9890/9908/7890/7908
Error Details
Error Code
Failed Part Error Name
1A37 Printhead Thermistor error
Head rank ID input
1A41 Printhead
error
CSIC destination
1427 CSIC
setting error
Ink Holder
CSIC
1428
adjustment error
Incorrect RTC data
RTC
1A23
error
RTC Access T/O
1A26 RTC
error
Transistor
Hardware environmental
1A38
temperature error
Hardware Head error
1A39
1A40 Hardware IC22 error
TROUBLE SHOOTING
Description
The Head FFC is not connected correctly.
The thermistor detects a temperature out of the specification.
The thermistor is broken.
The information of the Head rank ID is wrong.
An Ink Cartridge for a wrong destination has been installed.
The Ink Holder is not adjusted correctly.
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.
The value information on various absolute time stored on NVRAM is
abnormal.
The RTC circuit on the Main Board Assy malfunctions.
The transistor has a defect.
The thermistor detects a temperature out of the specification.
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.
The destination is wrong.
Remedies for Service Call Error
Remedy
Check the connection of the Head FFC, and if there is abnormality
(slant connection or the like), correct it.
Replace the Printhead. (See P.270)
Configure the Head rank ID again. (See P.374)
Replace the Ink Cartridge with a correct one for this printer.
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)
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.
P.426)
Check if the RTC backup battery is installed properly.
Replace the Main Board Assy. (See P.228)
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.
Replace the Printhead. (See P.270)
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)
Board Assy may have blown due to a slant connection of the Head
FFC.)
Configure the destination again.
Revision I
(See
(The fuse of the Main
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