Onkyo ht-r540 Service Manual page 5

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OPERATION CHECK-3
CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR)
[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).
[Procedure]
<Note> No output. No input.
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.
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.
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L 13942296513
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.
6. Press STANDBY/ON button.
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.
<Ex.>
V e r . 1 .0 1 /0 6 2 2 2 A
2. Press TONE button while the version is displayed.
<Ex.>
3. Confirm that the displayed temperature is within +/-20 C from the ambient temperature.
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4. Press STANDBY/ON button.
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T e s t - _
Blinks
T e s t - 4 -0 0
T e s t - 4 -3 6
FM STEREO
T e s t - 4 -3 6
FM STEREO
T e s t - 4 -3 7
C le a r
T : 2 5 C / 7 7 F
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C l e a r
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HT-R540
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