Onkyo TX-SR504 - Operation Check-3: Control of Power Supply

TX-SR504/504E/8450
OPERATION CHECK-3
CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR)
Test - _
Test - 4-00
Test - 4-36
Clear
Turn off
Blinks
Ver. 1.01/06222A
<Ex.>
<Ex.>
T: 25 C/ 77 F
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 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-4-36 " is displayed.
Test - 4-36
FM STEREO
4. At this time, confirm that the red characters of " FM STEREO " is displayed.
And, confirm that the relays RL6901 and RL6902 are turned off in 2 or 3 seconds.
6. Press STANDBY/ON button.
[Procedure]
<Note>
No output. No input.
[When]
1. Exchange power transistors (Q6050 - Q6056, Q6060 - Q6066).
2. Exchange power amplifier PC board ass'y (NAAF-8779).
3. Exchange thermal sensor PC board ass'y (NAETC-8781).
Thermal sensor
1. Press and hold downDISPLAY button, then pressSTANDBY/ON button when the unit is powered on.
The microprocessor version will be displayed for 3 seconds.
2. Press TONE button while the version is displayed.
4. Press STANDBY/ON button.
Test - 4-37
FM STEREO
5. Press TONE+ button and confirm that the red characters of " FM STEREO " is displayed.
And, confirm that the relays RL6901 and RL6902 are turned off in 2 or 3 seconds.
3. Confirm that the displayed temperature is within +/-20 C from the ambient temperature.