TX-SR506
OPERATION CHECK-3
SPEAKER PROTECT-3
Test - _
Test - 4-00
Current detection check
[When]
1. Exchange power transistors (Q6050 - Q6056, Q6060 - Q6066).
2. Exchange amplifier PC board ass'y (NAAF-9419).
[Procedure]
Notes : No input.
Do not check two or more channels at the same time.
Do not connect a dummy load to speaker terminal longer than 2 seconds.
1. Press and hold down CD button, then press ON/STANDBY button while the unit is powered on.
" Test - _ " is displayed only for 5 seconds.
2. Press AUX button, while " Test - _ " is displayed.
The unit will be in the state of " Test-4-00 ".
3. Repeatedly press + (TONE) button until " Test-4-35 " is displayed.
The shape of wave form of <Fig-1> is output from the speaker terminal in this state.
4. Connect the dummy load of 3 ohms to the Front L ch speaker terminals.
At this time, confirm that the speaker relay is not turned off.
5. Connect the dummy load of 1 ohm to the Front L ch speaker terminals.
At this time, confirm that the speaker relay is turned off and " Protect " is displayed.
Disconnect the dummy load immediately after checking the display of " Protect ".
6. Check other channels according to the same procedure as 4 and 5.
7. Press the ON/STANDBY button.
Test - 4-35
Clear
Turn off
Test - 4-35
Protect
Test - 4-35
Blinks
FL Display
20 mS
2 mS 2 mS
<Fig-1>
Test wave form
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
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
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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