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Type: DVD/CD/SACD player. Produced: Early 2000s (04/05?). Brand: Onkyo. Model: DV-SP502.

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Need Help: Onkyo DV-SP502 DVD/CD Player Won't Power On

I recently inherited a (what appears to be) minty Onkyo DV-SP502 DVD/CD player. I picked it up because it has a good DAC and can play SACDs. I hope to use it as the CD transport for my hodgepodge HIFI system.

The problem that I am facing is that the player will not power on when I plug it in. It will not turn on or go into standby mode. The person who gave it to me kept it in good condition, clean setting, and reported that it had previously worked without any problems.

My guess is that something is wrong with the power supply, perhaps? But the fuse appears to be intact and I do not have the equipment to test if a current is passing through the board. From the included pictures, does anyone have any ideas on what could be going on or what I could try to trouble shoot?

If it helps, the instruction manual does state the this player has some sort of specialized power cord that is designed to work specifically with this player—and that other power cords shouldn’t be used with it. I am not able to identify at this moment if the included power cord is the stock cable.

If you need further pictures or info, let me know. I’ll try to be responsive.

Thanks for the help!

(player interior)

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(power supply board)

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(power supply board)

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(power supply board)

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(power supply board)

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(power supply board)

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(disk drive)

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(DAC board)

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(player I/O)

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1 Answer

Hi @sam65142 ,

Without at least a DMM (digital multimeter), it will be difficult to find the problem as nothing appears to be visually wrong with the power board.

The service manual doesn’t have the schematics for the power board but on this page it shows the various DC voltage outputs being supplied by it.

I’m assuming that in the Standby mode that there will only be the one standby voltage being supplied that will allow the Standby LED to be turned on (not directly by the power board but via the main board), whereas the other voltages will only be there once the unit has been turned on. Unfortunately the manual doesn’t state what the value of the Standby voltage is or have a schematic of the power board, so if there is no voltage being supplied on any of the pins on the output from the power board, you will have to start back at the input to the board and work through the circuit.

Be safety aware if you decide to do this as you will be testing with exposed lethal AC voltage on the power board.

Hopefully a start.

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