Cooling Fan - Onkyo TX-NR3010S Service Manual

OPERATION CHECK-8

COOLING FAN

Circuit
Thermal sensor
THERMAL
Q6380,
Q6381
Power amp.
Condition to operate
OFF
LOW
THERMAL
MID
HIGH
THERMAL(Temparature of thermal sensor)
-30
Shut down
immediately
VOLH(Voltage of VOLH port)
0.35V 0.4V
OFF
Hysteresis control
How to check
How to check Cooling Fan.
See 1-10 in "OPERATION CHECK-2".
135,137
Q7016
MPU
(Main Microprocessor)
VOLH
136
Normal/ Bi-Amp
OFF or
LOW MID
Headphone
LOW STOP STOP
LOW LOW LOW
LOW MID MID
MID HIGH HIGH
45 50 52 55
OFF LOW
Hysteresis control
1.9V 2.0V 2.2V 2.3V
LOW MID
TX-NR1010/3010/5010/ DTR-70.4
Value D/A output of the MPU
OFF 0V
LOW 1.7V
MID 2.2V
HIGH 3.3V
FANCTRL
3
VOLH
Powerd Zone-2, 3
OFF or
HIGH LOW
Headphone
STOP STOP STOP
LOW LOW LOW
MID MID MID
HIGH HIGH HIGH
63 65
MID HIGH
3.3V
HIGH
COOLING FAN
Fan drive
Q2401,
Q2402
MID HIGH
STOP STOP
LOW LOW
MID MID
HIGH HIGH
90 100
Shut down in
Shut down
10 minutes
immediately
continuously