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KX-MC6020HX
6.10. Fan Section
6.10.1. Fuser Fan
This FAN is designed to cool the fuser. The FAN starts to rotate when AD34 or AC31 of IC300 turns to High level.
Depending on the operation mode, FAN speed is controlled to high, low, or stop.
The FAN speed is determined by the logic of AD34 and AC31 of IC300. (Refer to table shown below.)
Also the FAN rotation is detected by the hardware counter in IC600 through the terminal of A12 of IC600.
The FAN outputs the encode pulse while rotating.
"CALL SERVICE 4" that means Fuser FAN error is displayed if the detected pulse frequency is out of specifications. (Refer to
CALL SERVICE 4 (P.191)
X: don’t care
IC300-AD34 IC300-AC31 FAN control mode IC600-A12
Input pulse frequency
Operation mode
High X High speed Approx. 95Hz Print / Copy
Low High Low speed Approx. 65Hz Standby / PC Scan
Low Low Stop OHz (DC) Power save
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