Onkyo TX-NR906 Service Manual page 171

OPERATION CHECK-2
SPEAKER PROTECT-2 (CURRENT DETECTION)
[When]
1. Exchange the power transistors
2. Exchange the amplifier PC board ass'y
[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.
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.
Te s t - _
2. Press GAME/TV button, while " Test - _ " is displayed.
The unit will be in the state of " Test-4-00 ".
Te s t - 4 - 0 0
+
3. Repeatedly press TONE
Te s t - 4 - 3 6
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.
Te s t - 4 - 3 6
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.
P r o te c t
Disconnect the dummy load immediately after checking the display of " Protect ".
Te s t - 4 - 3 6
6. Check other channels according to the same procedure as 4 and 5.
Front R, Center, Surround L, Surround R, Surround Back L, Surroun R
7. Press ON/STANDBY button.
(Q6050 - 6056, Q6060 - 6066, Q6080 - 6086, Q6090 -
(NAAMP-9061, 9062, NACLA-9063 -
Blinks
button until " Test-4-36 " is displayed.
C l e a r
www.audiodna.sk
6096).
9069).
Turn off
TX-NR906/NA906