Re: Yamaha RX A3020
Does it behave the same if you connect more load to the output? (or increasing the volume) I say this in case the problem could be due to the power stage or the audio processing area.
If you connect it with the audio very low and the same thing happens at the same time, I guess the problem would not be the power stage.
If its the audio processing area, and there is not a BGA IC, it could be an LGA IC. Maybe you could try applying heat to some of these chips to see if the error occurs.
victorcas
Member
Last Activity: 09-24-2023, 08:30 AM
Joined: 10-10-2021
Location: Málaga
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Re: SHARP MX3100N duplicating yellow and magenta colours
It seems that it may be caused by misaligned heads. Some printers usually have an automatic alignment system. I have never used color toner printers, so I can't tell you exactly how to fix it.
Maybe, if you go into print properties on a PC, you will see an option similar to "Align ink cartridges". Some printers usually print a template and then you need to scan it to allign the cartridgesLeave a comment:
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Re: Yamaha RX A3020
I have found some devices with a similar error that was due to dirt (mostly sticky liquids) that when heated, increased the conductivity in some areas.
This might not be your case, but I don't know what else it could be.
Maybe there is a temperature sensor that makes it go into protection mode, although it is rare because otherwise it would generate an error or disconnect the relays. Just to try, you could try to heat the sensor to see if it disconnects earlier.
In order to discover where is the conflictive zone located, you...Leave a comment:
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Re: Thermaltake TR2 Bronze 600w low 12v voltage
Have you thought it might have something to do with the temperature?
This won't solve the problem, but it may provide some clues. You could try heating it with a hair dryer to see if the voltage changes or if it starts doing strange things.
Perhaps it may also have to do with some nearly desoldered part. Many times, due to vibration, inductors can get slack with a bad connection. You could try re-soldering the larger components. One way to check if this is a possible cause may be to tap the power supply while...Leave a comment:
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Re: Mosfets for P600W24V Smps
The manufacturer of IC is "Wu Xi China Resources Huajing".
It seems to be hard to find on the internet. Source:
[URL="http://www.ecadata.de/herst/myshowlogo.php?F_SPRACHE=2"]http://www.ecadata.de/herst/myshowlogo.php?F_SPRACHE=2[/URL]
Can you measure the size of the mosfet?
I am not sure if they are mosfet, because the part number does not match other mosfet part numbers from that company. They use "N" between the numbers instead of "R".
If those...Leave a comment:
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Re: Xilence 1200W. Keeps restarting
After some tests the power supply stopped working definitely. I checked the board again and noticed that 3 resistors were broken (R62, R74, R25), so I replaced them with 4.7 Ohm resistors (I didn't have SMD resistors of that size).After that, when I plugged in the power supply and turned it on, I heard a clicking sound and nothing .... After that, when I plugged in the power supply and turned it on, I heard a clicking sound and nothing .... I have not heard that clicking sound again.
I checked the diodes again but I don't see anything...Leave a comment:
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Re: Xilence 1200W. Keeps restarting
I have tested the PSU using a motherboard and it still does the same...
Yes, it looks like it has SMD power resistors. I don't know their value because the "001" code doesn't seem to follow the standard (I'm confused). If I measure the resistance there, the multimeter shows 0.1 Ohms (the minimum resolution of my multimeter is 0.1 Ohms).
There is also a through-hole resistor near the rails that is very odd... I haven't seen a resistor with 2 gold bands in the 3rd and 4th position (photo attached)....Leave a comment:
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Re: Corsair TX-750 problem with finding component
No, I have no idea... It seems to be a 1/2W resistor with a 1% tolerance. It may be used for current measurement. The value is impossible to read. It looks something like "green - brown - ? - ? - brown". You can check it with a multimeter to see if it is actually broken.
No. It is almost impossible to find a schematic of a modern power supply, especially the Corsair ones. I think the only way to find out the broken components is to compare it to another Corsair PSU.
...Leave a comment:
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Re: Corsair TX-750 problem with finding component
I have a Corsair CS750M and it uses a TNY278pn. Im not sure if its the same. Maybe you can check the datasheet and see if it fits.
Usually, when those components explode, it means there is something in short...
On the side of the big capacitor there is a resistor that seems to be broken. Did you checked that?Leave a comment:
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Re: Xilence 1200W. Keeps restarting
Thanks for replying!
There are 3 capacitors around the circuit and all of them are 35V. The values are 10uF, 40uF, 220uF. I have checked them with a multimeter and they are all ok but I have replaced them anyway and it doesn't work.
I have tested the power supply using a DC motor as a load but it doesn't work.... I will buy a car light to try it because I can't find a 12V resistive load that can handle a large amount of current. I have small bulbs that can draw around 80mA (I have also tested the PSU with one of these)....Leave a comment:
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Xilence 1200W. Keeps restarting
I have repaired a few PC PSUs before, but the problem has always been a broken Mosfet and blown capacitors fails. Now I am facing a PSU problem that I haven't seen before.
I have a Xilence 1200 PSU that had 4 broken capacitors on the 5V and 3,3V lines, and a faulty mosfet driver (A6069H). After replacing these components, the PSU starts up and turns on the fan providing all the correct voltages at the output, but shuts down after a second. when the output is low again (capacitor discharge, I guess), the PSU starts up again and repeats the whole process.
I think it... -
Re: New Members - please post your introductions here
Hello,
My name is Victor. I'm an electronic engineer and my hobby is to repair any kind of electronic devices.
I have found this forum very useful and I would like to be part of this communityLeave a comment:
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