Onkyo TX-SR876 - OPERATION CHECK-1; SPEAKER PROTECT-1 (DC VOLTAGE DETECTION)

OPERATION CHECK-1
SPEAKER PROTECT-1 (DC VOLTAGE DETECTION)
TX-SR876/SA876
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 GAME/TV button, while the characters of " Test - _ " are displayed.
The unit will be in the state of "
Test-4-00
".
3. Repeatedly press TONE+ button until the characters of " Test-4-22 " are displayed.
[Procedure]
<Note>
No load. No input.
Test - _
Test - 4-00
[When]
1. Exchange the power transistors (Q6050 - 6056, Q6060 - 6066, Q6080 - 6086, Q6090 - 6096).
2. Exchange the amplifier PC board ass'y (NAAMP-9061, 9062, NACLA-9063 - 9069).
Test - 4-22
Check whether the operation starts and continues automatically as follows.
Test - 4-22
Test - 4-23
Test - 4-26
Test - 4-24
Test - 4-25
Protect OK
Protect OK
Protect OK
Protect OK
Protect OK
Test - 4-36
Clear
Turn off
Front L ch
Check
If all channels are OK, the characters of
" Test - 4 - 36 "
are displayed.
4. Press ON/STANDBY button.
Front R ch
Check
Center ch
Check
Surround L ch
Check
Surround R ch
Check
Blinks
Test - 4-27
Protect OK
Surround Back L ch
Check
Test - 4-28
Protect OK
Surround Back R ch
Check