Chapter 7 Wiring Diagrams and Signal Information
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♦ Residual toner check circuit
In the residual toner check, four colors cannot be checked at a time but one color each is che cked in
order.
Which color of residual toner is checked is selected with the NOTNR_CHK_* signal, and the residual
toner is detected with the NOTNR_* signal of the selected signal. The result is returned to the PWBA
HNB MCU using the NOTNR signal.
Signal line name Description
SW TCRU_Y ON(L)+3.3VDC SENSOR TCRU ASSY (Y) ON/OFF detection signal
The switch is ON when toner bottle is present.
SW TCRU_M ON(L)+3.3VDC SENSOR TCRU ASSY (M) ON/OFF detection signal
The switch is ON when toner bottle is present.
SW TCRU_C ON(L)+3.3VDC SENSOR TCRU ASSY (C) ON/OFF detection signal
The switch is ON when toner bottle is present.
SW TCRU_K ON(L)+3.3VDC SENSOR TCRU ASSY (K) ON/OFF detection signal
The switch is ON when toner bottle is present.
NOTNR_Y Residual toner detection signal by SENSOR TONER LOW (Y)
NOTNR_M Residual toner detection signal by SENSOR TONER LOW (M)
NOTNR_C Residual toner detection signal by SENSOR TONER LOW (C)
NOTNR_K Residual toner detection signal by SENSOR TONER LOW (K)
NOTNR_CHK_Y SENSOR TONER LOW (Y) selection signal in residual toner
check
NOTNR_CHK_M SENSOR TONER LOW (M) selection signal in residual toner
check
NOTNR_CHK_C SENSOR TONER LOW (C) selection signal in residual toner
check
NOTNR_CHK_K SENSOR TONER LOW (K) selection signal in residual toner
check
NOTNR Residual toner detection signal