Error Types And Countermeasures - Epson TM U200D - B/W Dot-matrix Printer Technical Manual

Error Types and Countermeasures

Follow the flowcharts on the next page based on the ERROR LED blinking patterns in the table
below and repair the printer. The printer does the following when an error occurs:
All operations stop
The printer goes off-line (when DIP SW2-3 is off)
The ERROR LED blinks.
ERROR LED blinking patterns
Error
(1) Head high-temper-
ature error ( 1)
*
(2) Auto cutter error
Home position
detection error
(3) Memory or gate
array read/write
error
(4) High-voltage error
(5) Low-voltage error
(6) CPU execution
error
Print head
(7) Thermistor error
temperature
detection error.
( 1) This error can occur for a short time during normal printing, when the print head reaches a high temperature. No repair
*
is necessary in this case.
4-14 Troubleshooting
Error Description
Print head temperature is too high.
There is an abnormality in the
Home position cannot be detected
auto cutter.
due to a paper jam or other problem.
Read/write check has failed.
Power supply voltage is too high.
Power supply voltage is too low.
CPU is trying to execute an invalid
address.
Print head temperature is out of
There is an abnormality in detecting
normal operating range.
the print head temperature or the print
head rank can not be read correctly.
ERROR LED Blinking Pattern
160 ms
Action
Action 1
Action 2
Action 3
Action 4
3
3
Action 5
4
Action 6
Action 7
4
Rev.B