Onkyo TX-SR875 - Operation Check-3 Control of Power Supply

TX-SR875
OPERATION CHECK-3
CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR)
Test - _
Test - 4-00
Test - 4-37
Clear
Turn off
Test - 4-37
FM STEREO
Blinks
Main:
8 1. 05/07903A
<Ex.>
<Ex.>
T: 30/30 FAN: -
Clear
Turn off
Output sensor
1. Press and hold down CD button, then press
STANDBY/ON
button while the unit is powered on.
" Test - _ " is displayed only for 5 seconds.
2. Press
GAME/TV
button while
" Test - _ "
is displayed.
The unit will be in the state of "
Test-4-00
".
3. Repeatedly press TONE
+
button until
" Test-4-37 " is displayed.
4. At this time, confirm that the red characters of
" FM STEREO " is displayed.
5. Press STANDBY/ON button.
[Procedure]
<Note>
No output. No input.
[When]
1. Exchange the power transistors (Q6050 - 6056, Q6060 - 6066, Q6080 - 6086, Q6090 - 6096).
2. Exchange the power amplifier PC board ass'y (NAAMP-9061, 9062, NACLA-9063 - 9069).
3. Exchange the thermal sensor PC board ass'y (NAETC-9042, 9043).
Thermal sensor
1. Press and hold down
DISPLAY button, then press
STANDBY button when the unit is powered on.
The main microprocesor version will be displayed only for 3 seconds.
2. Press
TONE
button while the version is displayed. The temperatures of two thermal sensors (Q6380, Q6381) will be displayed.
3. Confirm that the displayed temperature is within +/-20 C from the ambient temperatures.
4. Press STANDBY/ON button.
Temperature unit is C