I think i fried the power supply shorting against the chassis.. is it worth trying to fix it? touched bare speaker wire to chassis while it was on...

The error message "Miswiring DC offset" on a Kenwood DDX69028 stereo typically indicates a problem with the wiring or power supply. Here's what you can try to resolve the issue:
1. Check the Wiring Connections: Ensure that all the wiring connections are properly made. Verify that the power, ground, and speaker wires are securely connected and not loose or disconnected. Pay attention to any loose or exposed wires that may be causing a short circuit.
2. Check the Power Supply: Make sure that the power supply to the stereo is stable and within the specified voltage range. Use a multimeter to measure the voltage at the power wire connection and ensure it matches the recommended voltage for your stereo model.
3. Verify the Speaker Connections: Ensure that the speaker wires are properly connected and not shorted or crossed. Check for any loose strands of wire that may be causing a connection issue.
4. Inspect for Short Circuits: Look for any signs of a short circuit, such as bare wires touching each other or the vehicle's chassis. If you find any, isolate and insulate the affected wires to prevent further issues.
5. Reset the Stereo: Try resetting the stereo to its factory defaults. Refer to the user manual for instructions on how to perform a reset. This may help clear any temporary errors or glitches.
If none of the above steps resolve the issue, it is recommended to consult the user manual or contact Kenwood's customer support for further assistance. They will have specific troubleshooting steps and can provide guidance based on your stereo model and the exact error message you're experiencing.

Very likely the power amp output transistors are shorted and need to be replaced. The fuses provide power to these transistors. To verify this diagnosis, (with the speakers disconnected and the unit unplugged, of course!), check for continuity between the fuse terminal and the speaker output at the amplifier board (before any protection relay). If you have continuity (< 1 ohm resistance), the transistor is bad. Most power amplifiers have one transistor to the DC+ power supply and another to the DC- power supply. Both are connected to one speaker terminal, and the other speaker terminal goes to power supply ground. If one transistor shorts out, it overloads the other transistor and fries it as well. Even if it tests good, it's probably been damaged and is likely to short and ruin the new transistor, so replace both at the same time. The foregoing holds true if the output transistors are inside a power amp module.

Note: check your speaker wiring (both ends) after repairing the amplifier. A stray strand at the speaker connector shorting to the other terminal or ground can destroy the output transistors. I once had a customer who had too much bare wire exposed on the ends of his speaker wire. It was fine until his wife turned the speaker upside down during cleaning and twisted the bare wires together (and forgot to right the speaker afterwards). He bought fuses and transistors ...

The Push Power/Protect error either means the speaker wires are touching a point that they shouldn't or there is an internal short in the system. Turn off the stereo system. Check the placement of the speaker wires. Make sure that the wires aren't frayed or damaged. Make sure that no part of a bare wire is touching the back of the main unit or the speakers. Check that the bare wires aren't touching each other.

If the problem persists, then there is an internal short. There is a service manual at https://www.manualsLib.com , you can find it with a Google search. I do not know if it is worth fixing the system with an internal fault.

I hope this helps.

Cindy Wells

First guess I have is you have speaker wires crossed or shorting out against each other, check your speaker wiring make sure no bare wires are touching each other, most amplifiers will automatically shut off if it senses a short. It doesn't specify, but i am taking a guess this is a amp/receiver

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_54ae41aaaffbab00

This could be due to one of a couple things:
- Speaker wires shorting out against each other (or the speaker may be shorted out itself)
- Not enough current coming through the power wire (check power connection, ensure you are using big enough wire, i.e. 4awg)
- Not grounded well enough (check ground connection, make sure chassis ground is against bare metal and solid)

Check that the antenna isn't rubbing against the chassis as mine got rubbed thru and I think shorted the sensor. After trying playing with the left switch on the remote about 20-30 times it synced again with my chopper and I touched the open antenna wire purposely against the chasis and it would lose signal, then I removed it and it worked again. Tried that a few times so I think it's rubbing against something causing it to short out.

check speaker wire connections on the back of receiver
bare wires should never touch each other or the metal chassis
if all connections and speakers seem ok the problem is internal witch can go from blown power supply to shorted output devices and everything in between , and as always look for repair shop in your area, do not attempt to do it yourself, firehazard and electric shock are the things we all want to avoid ;)

Sounds like there could be a short somewhere. Check to make sure that there aren't any (exposed/bare) wires touching each other or if there is a bare spot of wire touching something metal. Check both ends of all the wires. A speaker wire may have come lose and is shorting out against the frame or some other place. Usually if it goes straight into protection mode or you're popping fuses you have a short somewhere. I assume the capacitor you installed is somewhere on the power line, which would be for helping with
noise. You can also try disconnecting your amp from your stereo and see what happens but leave the speakers connected, you don't want to run the amp with out a load on it (the speakers). If your amp doesn't go into protection mode when the stereo is disconnected, then you have a problem with the stereo and not the amp, assuming you already checked for any possible shorts first.

search for a short to chassis when you mount the speaker,there's no problem if the magnet touch the chassis. you can test the cables with a multimeter.check if the tiny flexible cables on the speaker touch metal when is in movement. (on sound).

In a Kenwood deck, "PROTECT" usually means that one of the speaker output wires is shorted. The first thing to do is pull the deck and inspect the wiring at the back, making sure there aren't any pinched or exposed wires. If a speaker wire is pinched against the deck chassis, or bare wire is touching dash metal, it can cause your problem. If you don't see anything obvious, disconnect all speaker wires from the deck, then turn it on. If it still flashes "protect", then you have a defect in the unit. If not, then re-connect the speakers one at a time until you find the one that causes it to go into Protect mode. Usually if you don't find a pinched or shorted wire behind the radio, the problem can be found at the speaker itself. This is especially common if you've installed after-market speakers; if a speaker terminal connection has come loose and is now touching the speaker basket or mounting surface, it will shut down the deck.