TX-SR604/604E/8460
OPERATION CHECK-2
SPEAKER PROTECT-2 (CURRENT DETECTION)
1. Press and hold down the
CD
button, then press the
STANDBY/ON
button while the unit is Power ON.
" Test - _ " is displayed only for 5 seconds.
2. Press the VIDEO 3 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.
4. Connect the dummy load of
3
ohms to the Front L ch speaker terminal.
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 terminal.
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.
[Procedure]
<Note>
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.
Test - _
Test - 4-00
[When]
1. Exchange power transistors (Q6050 - Q6056, Q6060 - Q6066).
2. Exchange amplifier PC board ass'y (NAAF-8911).
Test - 4-35
Clear
Turn off
7. Press the
STANDBY/ON
button.
Test - 4-35
Protect
Test - 4-35
Blinks
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