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Re: My screen on my kenwood dnx 6990hd says (DC OFFSET...
Basically that means there is an overload or some form of power issue with the machine.
The best thing to do is reset the unit to start with. Do you have the manual?
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GET THE USER MANUAL OR SERVICE MANUAL
AND SEE THAT THAT MEANS.
IT CAN BE,
12VDC TO THE (POWER) IS BAD 12VDC AND GROUND
OR (seems to me NOT POWER)
CAN mean one of speakers failing like this.(this)
1: shorted speaker, (CALLED VOICE COIL SHORTS
2: shorted speaker WIRES, to shorted to car body ground.
3 using wrong speaker if 2ohms is not allowed but 4-8ohms is allowed. or putting 2x 4 ohm speakers in parallel fails. as it will;./
4: amp is bad.(in the head end)
page 62 in your manual states
If the power is not turned on ("Miswiring DC Offset
Error", "Warning DC Offset Error" is displayed),
the speaker wire may have a short circuit or
have touched the chassis of the vehicle and the
protection function may have been activated.
Therefore, the speaker wire should be checked
THE REAL MEANING, (ME TOLD) IS ONE OF THE SPEAKER PRESENTS A OVERLOAD TO ANY AMP OUTPUT CHANNEL. TO FIND THISONE MUST DISCONNECT SPEAKERS TO FIND IT.
YES SPEAKERS AND WIRES CAN SHORT.
A TECH EVEN TRIES TEST SPEAKER 1 AT TIME TO PROVE THIS.
IF ALL TESTS FAIL THE AMP IS BAD.
You either have a loose connection on your head unit or a fault with the unit take it to. Car audio store get them to connect it up on the bench if it stays on faults in your wiring.
DC offset is most often caused by the bias level for the output transistors changing for some reason. This could just be that the control is dirty and needs to be cleaned and re-adjusted, or the biasing network has a problem, most likely the diode or transistor that is being used to set the reference. The diode or transistor is often mounted to the heatsink for thermal feedback, which allows the bias to change depending on how hot the output transistors are getting, There is no mention as to how high the DC offset is. The usual range for DC offset adjustment is less than +/- 1 volt. If your offset is higher than this, there usually is a problem with the bias circuit that needs to be repaired. If it is MUCH higher, then one of you output transistors or driver transistors is most likely defective.
It could be a wire that become exposed in the back of the radio. If it works good when your engine off. It's doing it when you have the engine is runing because more things are running wich could cause a short out.
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