DTR-5.8
OPERATION CHECK-4
Condition of Protect Mode
Condition of Power Supply Control
Condition of Cooling Fan Operation (WT and WO type only)
The unit will go into Protect mode under the following conditions.
(T: Thermal sensor temperature)
The power supply voltage(VH or VL) for power amplifiers is changed by the relays: RL6901 and RL6902.
VH > VL
T: Thermal sensor temperature
VOLH: Pin #89 input voltage of Main microprocessor: Q701 (Refer to SD-2:A3 and SD-5:F2 of Schematic Diagram)
This is created by the largest ac voltage in 7 speaker outputs.
The sum of dc voltage of 7 channnel speaker outputs is more than 7 V.
This condition is equivalent to OPERATION CHECK-2. Refer to the page 2.
Test wave form:
The cooling fan will stop or rotate at high speed or low speed under the following conditions.
After 10 minutes of T >= 100 C
or
Immediately T <= -30 C
or
Immediately T > 150 C
or
Immediately T>= 90 C (if T > 40 C when Power is on)
or
Immediately T .= 90 C (if the unit is powered on longer than 24 hours)
1. Thermal condition
2. DC voltage condition
Protect will be On if speaker output ac current >= 35 A
Protect will not be On if speaker output ac current >= 11.7 A
3. Current condition
2 msec 2 msec
20 msec
VH: VOLH > 2.5V (Equivalent to 23.8Vrms at Speaker Output)
or
T >= 65 C
VL: Conditions except above
STOP:
VOLH <= 0.5V
LOW SPEED:
VOLH > 0.5 and T < 55 C
HIGH SPEED:
VOLH > 4V or T >= 55 C
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299