Onkyo TX-SR804 Service Manual page 3

OPERATION CHECK-1
SPEAKER PROTECT-1 (DC VOLTAGE DETECTION)
[When]
1. Exchange power transistors (Q6050 - Q6056, Q6060 - Q6066).
2. Exchange amplifier PC board ass'y (NAAF-8678, NAAF-8682).
[Procedure]
No load. No input signal.
<Note>
1. Press and hold down CD button, then press STANDBY/ON button while the unit is Power ON.
" Test - _ " is displayed only for 5 seconds.
2. Press VIDEO 3 button, while the characters of " Test - _ " are displayed.
The unit will be in the state of " Test-4-00 ".
3. Repeatedly press TONE
Check whether the operation starts and continues automatically as follows.
If all channels are OK, the characters of " Test - 4 - 35 " are finally displayed.
4. Press STANDBY/ON button.
T e s t - _
Blinks
T e s t - 4 - 0 0
+
button until the characters of " Test-4-21 " are displayed.
T e s t - 4 - 2 1
T e s t - 4 - 2 1
Front L ch
Check
P r o te c t O K
T e s t - 4 - 2 2
Front R ch
Check
P r o te c t O K
T e s t - 4 - 2 3
Center ch
Check
P r o te c t O K
T e s t - 4 - 2 4
Surround L ch
Check
P r o te c t O K
T e s t - 4 - 3 5
C le a r
T es t - 4-25
P rot ec t OK
T es t - 4-26
P rot ec t OK
T es t - 4-27
P rot ec t OK
P rot ec t
Turn off
TX-SR804/804E
Surround R ch
Check
Surround Back L ch
Check
Surround Back R ch
Check