| - | It's possible to bypass the protective mode on any onkyo receiver |
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| + | It's possible to bypass the protective mode on any onkyo receiver here is how you do |
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| + | '''Operation of Self—diagnostic''' |
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| + | Self-diagnostic will start at the timing of next power on, after goes to the protect mode by Current detection or DC voltage detection. |
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| + | Only On/Standby key could work in this mode. Also remote control does not work. |
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| + | However, the CLEAR operation is enabled. |
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| + | During Self-diagnostic, the power supply for amplifier circuit become low voltage state(SEC1-LOW), and the speaker relay will be turned off. Then, MPU will check each amplifier circuits internally by entering the test signal (20 kHz,-20 dBFS sine wave) to each channel from DSP. |
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| + | MPU will judge the amplifier circuit is good or not from VOLH value. |
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| + | The normal range of VOLH value is 0.04 V < VOLH < 0.20 V. |
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| + | If VOLH value is in the out of this range, it will be judged as NG (No good). |
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| + | '''No problem found''' |
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| + | When protected by current detection, and no problem found, "CHECK SP WIRE“ will be displayed in this State, Only the On/Standby key is effective. And it do not anything for 3 minutes, unit goes into stand by automatically. |
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| + | When protected by a DC voltage detection, and no problem found, unit goes into normal operation. |
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| + | '''Problem found''' |
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| + | When judged as there is a problem on any channel, the information of channel that has a problem will be displayed. In this State, Only the On/Standby key is effective. Also remote control does not work. if do not anything for 3 minutes, unit goes into standby automatically. This state will keep also after unit turn on/off, or AC unplugged. |
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| + | The power supply for the amplifier becomes low voltage state and the speaker relay will be turned on. |
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| + | '''Repair Process and How to Confirm''' |
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| + | '''Confirmation of the protect cause''' |
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| + | While NG channel is displayed, You can confirm the protect cause by following the step below |
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| + | 1. Press the Enter button |
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| + | 2. The protect cause are displayed for 5 seconds. |
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| + | Please check the around of those amplifier circuit and repair it. |
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| + | '''Clear of NG CH information''' |
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| + | After repair, you can clear NG CH information by following the steps below. |
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| + | 1. Press the On!Standby key while pressing the Enter key. |
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| + | 2. Display as in the right figure appears. |
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| + | 3. Unit goes into Standby automatically after 5 seconds. |
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| + | Self-diagnostic will start again at the timing of next power on. |
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| + | By this, You can verify whether repair was properly or not. |
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| + | If problem found after repair, please re-check the around of its circuit. |
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| + | '''Cancel of Self-diagnostic''' |
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| + | You can cancel this mode by clear operation (press Standby key while pressing CBL/SAT key) |
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| + | After cancel this mode, receiver will be started as normal operation. |
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