CAUTION :
1. Toner low can be judged by continuous 5-times TONER LOW
signal at only printing.
(It is not executed at initialization.)
2. Toner full can be judged by continuous 3-times TONER FULL
signal at initialization.
(It is not executed at printing.)
3. In the ordinal operation, “CHECK DRUM” is displayed when
TONER EMPTY sensor does not generate a signal for 2.7 seconds.
7.10. OPERATION BOARD SECTION
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