Epson Stylus Pro 9900 - Page 210

Pro 7900 and 9900 Field Repair Guide 10/6/10
Printer Error Codes (Service) Printer Component, Software Item, LCD Display, Printer Button Page 210.
1A26 RTC Communication Error The RTC circuit on the Main
Board is malfunctioning.
1. Unplug the Printer.
2. Remove the Battery for 30 seconds.
3. Re-install the Battery.
4. Using the Adjustment Wizard run the
RTC USBID adjustment.
5. Replace the Main Board.
1A37 Thermistor Sensor Error The Thermistor on the
Print Head reports an over
temperature condition
1. Re-seat the Print Head Cables on the
Main Board side.
2. Re-seat the Print Head Cables on the
Print Head side.
3. Replace the Main Board.
4. Replace the Print Head.
1A38 Transistor Environment
Temperature Error
The Thermistor on the
Print Head reports tempera-
ture out of range.
1. Replace the Print Head.
1A39 Print Head Error The Print Head reports an
error.
1. Replace the Print Head.
1A40 IC22 Error The Destination Setting
(Country Setting) on the
Main Board is wrong
1. Correct the destination setting.
2. Replace the Main Board.
1A41 Head Rank Id Input Error Head Rank Data is wrong 1. Re-enter the Head Rank Data.
2. Replace the Main Board.
Main
Board
Errors
Explanation Description Remedy