Question about Onkyo TX-DS777

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No Life, does NOT power up, Fuse is OK

The unit fails to power up. There is no problem with the AC fuse, but somehow the 13 VDC dos not get generated. The 13 Volts transformer is OK. The "POWER" pin from the connector on the AC input PCB does not seem to be getting the up. Any thoughts? ? ? Thanks

SAM

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  • TAWDI May 10, 2008

    Thank you much for trying. There is no problem with the standby transformer, secondary OK, Bridge rectifier across the secondary [13 v ] OK, but the unit does NOT even light up, nor does the power On/Off switch do anything. Even if the AC line is brought directly to the primary of the main power transformer the receiver does not even light up. Again thank you much for trying.Tawdi

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Try this since it might be dead any ways put on surge protector hit the surge button 3 times fast this can shock the system and bring it back
heres another idea why its off fraid wires in the speaker outputs jacks sometimes the little wires pull off inside when disconnecting system this can trigger a fault in sterio to complete shut down till cleaned out hair is also a very good conductor to shutting down the system

Posted on May 10, 2008

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There is apparently some component in the stanby circuit that is malfunctioning. There may be a milli amp fuse off the standy transformer secondary. Check - don't confuse with a resistor. It may read 2 ohms or less

Posted on May 10, 2008

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Power


1. Make sure the AC outlet is good.
2. Make sure there is no damage to the AC line cord.

3. Look to see if there is a fuse at the rear of the unit. It's usually located inside a black circular housing with a screw off cap that says "fuse".

If not, unplug the unit and remove the outside cover. Look for a blown fuse on the motherboard or power supply. Replace it with the EXACT value of the original fuse. You can purchase a new fuse at Radio Shack or hardware store or auto parts4.gif store. Try powering up the unit again and see if it works now or whether the fuse blows again. If it blows again, the power supply may have been damaged.
Please let me know if I can be of further assistance to you.

Good luck!

- Jim

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