Epson Stylus Pro 4400 Service Manual page 188

EPSON Stylus Pro 4400/4450/4800/4880/4880C
SERVICE REQ. 00010026
Error meaning:
RTC communication error
Explanation
There may be a case where the RTC circuit on the BOARD ASSY., MAIN
operates incorrectly (is operated as test mode). In such a case, this
message is displayed and the printer stops operating.
Remedy
1. Remove the battery once with the power turned off and after waiting for
a while, install the battery again and turn the power on.
2. Repeat Step1 above until this error does not occur at power-on.
Start up the printer in Maintenance Mode 2
"RTC&USBID&IEEE1394ID" to set the date using basic adjustment in
the the adjustment program.
SERVICE REQ. 00010028
Error meaning:
Head error
Explanation
Print Head has been damaged or undefined NMI was detected at CPU.
Remedy
Replace the Printhead (p.285)
Troubleshooting
SERVICE REQ. 00010029
SERVICE REQ. 0001002A
(p.90), execute
SERVICE REQ. 0001002B
Troubleshooting Based on Panel Messages
Error meaning:
Unidentified NMI
Explanation
CPU has detected undefined NMI.
Remedy
If this error is not cleared even when the power is turned off once and on
again, replace the C593 MAIN Board (p.226)
Error meaning:
CR ASIC ECU error
Cause of trouble
Faulty firmware (irregular overwriting of register, etc.)
Damaged drive circuit board (break in pattern, etc.)
Remedy
1. Installing Firmware (p.444)
2. Replace the C593 MAIN Board (p.226)
Error meaning:
PF ASIC ECU error
Cause of trouble
Faulty firmware (irregular overwriting of register, etc.)
Damaged drive circuit board (break in pattern, etc.)
Remedy
1. Installing Firmware (p.444)
2. Replace the C593 MAIN Board (p.226)
Revision C
188