TX-SR506
OPERATION CHECK-1
SPEAKER PROTECT-1
Circuit configuration
The unit go into protect mode when either of thermal detection, dc voltage detection or current detection circuit operates.
Condition to operate
The unit will go into the Protect mode under the following conditions.
1. Thermal condition
2. DC voltage condition
The sum of dc voltage of 7 channel speaker outputs is more than 7 V.
3. Current condition
The ac current of speaker outputs is more than 35 A.
This condition is equivalent to TEST-4-35 in OPERATION CHECK-3.
Thermal detection check
[When]
Exchange thermal sensor PC board ass'y (NAETC-9421).
[Procedure]
1. Press and hold down DISPLAY
button, then press ON/STANDBY
button when the unit is powered on.
The microprocessor version will be displayed for 3 seconds.
2. Press TONE
button while the version is displayed.
3. Confirm that the displayed temperature is within +/-20 C from the ambient temperature.
4. Press ON/STANDBY button.
Ver.1.02/08408A
<Ex.>
000 033 F:x S:H
Clear
Turn off
T ( C) Thermal sensor temperature
100 <
-30 >
150 <
90 < (40 C when power on)
90 < (The unit powered on longer than 24 hours)
Protect
On (after 10 min.)
On (immediately)
On (immediately)
On (immediately)
On (immediately)
--->
--->
--->
--->
--->
Power supply voltage of +/-B1
H : VH (high voltage)
L : VL (low voltage)
State of cooling fan
x : Stop
L : Low speed
H : High speed
T ( C)
Thermal sensor temperatuer
VOLH (V)
Voltage of VOLH port
FL Display
<Ex.>
Q701
Main Microprocessor
65
PROTECT
THERMAL
Thermal sensor
67
FL
FR
SBL
SR
SBR
SL
C
Power amplifier
VPRO : DC voltage detection
IPRO : Current detection
Q6702 Q6701
Q6703
IPRO
+B
VPRO
Q6070
Q6071
Q6072
Q6073
Q6074
Q6075
Q6076
APOWER
Q9002
RL901
67
AC in
Power trans
Q6380
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8
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E
L
1
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9
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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