Onkyo HT-R960 - Page 94

TX-SR606
OPERATION CHECK-5
COOLING FAN
Circuit configuration
Condition to operate
The cooling fan will stop or rotate at high speed or low speed under the following condition.
FANCTRL
Q701
Main Microprocessor
3
135
VOLH
THERMAL
Thermal sensor
136
FL
SR
SL
C
FR
SBL
SBR
Output sensor
Power amplifier
Note : MWT, MWO, MWF type only
Cooling fan
Q9101, 9102
Q9111, 9112
Fan drive
Q6380
0 to 0.35
0.35 to 1.75
55 to 110
High Speed
Stop Low Speed
High Speed
VOLH (V)
VOLH port of MPU
T ( C)
Thermal sensor
temperature
1.75 to 3.3V
High Speed
Operation of Cooling Fan
-30 to 55
High Speed