Onkyo TX-NR545 - Cooling Fan Operation

Appendix
5 4 3
2
1
6
D
C
A
B
D
C
A
B
5 4 3
2
1
6
TX-NR545/646/747
DTR-20.7/30.7/40.7
Cooling Fan
E.g. (TX-NR646)
Condition to operate
THERMAL (Temperature of thermal sensor)
VOLH (Voltage of VOLH port)
About Cooling Fan
Thermal sensor
Q6300
Power
Amp.
Main Microprocessor
Q7009
Fan driver
Q8710
Q8711
Q8714
Cooling Fan
138
140
3
THERMAL
VOLH
FANCTRL
Value D/A output of Main Microprocessor
OFF 0V
LOW 2.0V
MID 2.7V
HIGH 3.3V
VOLH
OFF or
Headphone
LOW MID HIGH
THERMAL
OFF STOP STOP STOP STOP
LOW LOW LOW LOW LOW
MID LOW MID MID MID
HIGH HIGH HIGH HIGH HIGH
Shut down
immediately
OFF LOW MID HIGH
Shut down in
10 minutes
continuously
Shut down
immediately
OFF LOW MID HIGH
-30℃ 45℃ 50℃ 52℃ 55℃ 63℃ 65℃ 95℃ 100℃
0V 0.35V 0.4V 1.9V 2.0V 2.2V 2.3V 3.3V
Hysteresis control
Hysteresis control