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Operation of Control Parts
CL-S6621 2-42
The comparator U17B detects if the level at pin 5 (CUTTMP) exceeds a certain reference level
determined by the output from pin C11 (nTEMP_ENABLE) of U14 (FPGA) (i.e., the
predetermined allowable limit temperature). If it does, the signal nTEMP_ERROR at pin C6 of
U14 (FPGA) goes “Low” level. Then, the System error is displayed and the printer stops. At this
time, nTEMP_ENABLE at pin C11 is set to “Low” level so that nTEMP_ERROR is securely
maintained at “Low” level. (To clear the System error, you need to turn OFF the printer once
and then turn it ON.)