They may have been looking for shorted or leaking transistors. If the differential amplifier transistors are not well matched, the DC offset would increase. If you swap the differential amplifier transistors from a good channel to this channel and the DC drops significantly, you know that you need to replace them.
If the amp has DC offset protection and the amp fails in a way that causes DC to be driven to the speakers, the speakers could be damaged.
If the amp has DC offset protection and the amp fails in a way that causes DC to be driven to the speakers, the speakers could be damaged.
Hello Perry and Mote,
i have been reading this topic and i realized that i have exactly the same problem as Mote with the difference i have no offset voltage in the outputs.
With the jumper disconnected the amp works perfectly. I have done everything just like you suggested in the posts and i am kind of lost now. All the small signal and power transistors of the board are ok (i removed and tested one by one) so there is no other option than a resistor or a capacitor (out of value).
On the other hand, i have been using this amp for a while now and the weird thing is that in the past sometimes (while using it) it protected, so i had to power it off, wait a couple of minutes and power it on again to make it work. Then, after a couple of months it is always in protection mode. This is also why i guess it may be an R or C.
Any of you have the schematic of this amp?
Mote: Did you solve your problem?
Thank you very much.
Best regards.
Valentin
i have been reading this topic and i realized that i have exactly the same problem as Mote with the difference i have no offset voltage in the outputs.
With the jumper disconnected the amp works perfectly. I have done everything just like you suggested in the posts and i am kind of lost now. All the small signal and power transistors of the board are ok (i removed and tested one by one) so there is no other option than a resistor or a capacitor (out of value).
On the other hand, i have been using this amp for a while now and the weird thing is that in the past sometimes (while using it) it protected, so i had to power it off, wait a couple of minutes and power it on again to make it work. Then, after a couple of months it is always in protection mode. This is also why i guess it may be an R or C.
Any of you have the schematic of this amp?
Mote: Did you solve your problem?
Thank you very much.
Best regards.
Valentin
Please don't post in a repair thread that was started by someone else unless you are trying to help them.
Click on the red triangle in the lower left corner of your post and ask a moderator to move your post (and any replies to it) to a new thread (my post should be deleted).
After it's moved, I'll try to help you.
Click on the red triangle in the lower left corner of your post and ask a moderator to move your post (and any replies to it) to a new thread (my post should be deleted).
After it's moved, I'll try to help you.
i am so sorry, i didn't know.
I have started a new thread:
http://www.diyaudio.com/forums/car-audio/254078-weconic-vx-4260-protected.html
Thank you.
I have started a new thread:
http://www.diyaudio.com/forums/car-audio/254078-weconic-vx-4260-protected.html
Thank you.
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