TX-NR515/515AE/616/616AE/ HT-RC460/470/ HT-R791/ DTR-20.4/30.4
OPERATION CHECK-7
COOLING FAN (TX-NR616/616AE/ HT-RC470 only)
Circuit
FANCTRL
3
136
VOLH
THERMAL
Thermal sensor
135
Power amp.
COOLING FAN
Q2401,
Q2402
Fan drive
Q6380
VOLH
THERMAL
Q7009
MPU
(Main Microprocessor)
Normal/ Bi-Amp
Powerd Zone-2, 3
LOW
OFF or
Headphone
OFF or
Headphone
LOW
MID
LOW
MID
HIGH
HIGH
OFF
LOW
HIGH
MID
MID
LOW
LOW
STOP
LOW
LOW
STOP
STOP
STOP
STOP
STOP
STOP
HIGH
LOW
LOW
LOW
LOW
LOW
MID
MID
MID
MID
MID
MID
MID
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
THERMAL(Temparature of thermal sensor)
-30
55 60
62 65
73 75
95
100
Shut down
immediately
Shut down
immediately
Shut down in
10 minutes
continuously
HIGH
MID
LOW
OFF
Hysteresis control
VOLH(Voltage of VOLH port)
0.35V 0.4V
1.9V 2.0V 2.2V 2.3V
3.3V
HIGH
MID
LOW
OFF
Hysteresis control
Value D/A output of the MPU
OFF
LOW
MID
HIGH
0V
1.7V
2.2V
3.3V
Condition to operate
How to check
1. How to check Cooling Fan.
See 1-13 in ”OPERATION CHECK-2”.
2. How to check the value of THERMAL and VOLH.
See 1-8 in ”OPERATION CHECK-1”.