-
Useful conversions. I don't "speak" imperial. Please use metric, if you want to address me.
1km=1000m=100000cm, 1inch=2.54cm, 1mile=1609.344meters, 1ft=30.48cm 1gal(US)=3.785liters, 1lb=453grams, 1oz=28.34grams -
Re: Logitech Z506 power supply
Now i installed Dell Laptop Adapter wich is 19.5 volt 3,34a now working properly but after 3-4 hours need to cooldown 5-10 min so after i can use without problems. On board there is STA540 modules maybe getting too hot i dont know. Others looking fine.Attached FilesComment
-
-
Re: Logitech Z506 power supply
Do you have or can you get freezer spray? That can help find an overheating issue."Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHornComment
-
Re: Logitech Z506 power supply
The STA540 has integrated thermal cutoff at 150C.
The temperature is extremely high for normal operation.
Use IR thermometer to measure the temperature.
Check voltages to the STA540.
Almost all the time, this kind of malfunctions are due to bad STA/STK/TDA amplifier chip.
150C is not too hot. It's almost melting the solder.
Boards with amplifier IC-s are pretty simple. Almost always it's the STA/STK/TDA fault.Last edited by televizora; 12-19-2020, 03:20 PM.Useful conversions. I don't "speak" imperial. Please use metric, if you want to address me.
1km=1000m=100000cm, 1inch=2.54cm, 1mile=1609.344meters, 1ft=30.48cm 1gal(US)=3.785liters, 1lb=453grams, 1oz=28.34gramsComment
-
Re: Logitech Z506 power supply
Hell guys now i refreshed thermal paste on the aluminum board and plus i addes fan inside the box
lets what will happen if it continue like that im gonna change both chips. Hopefully its not goes this way Thank a lot i didint feel alone on this way 
I forgot to take photos but i used old model 12 vold DC fan along with Pentium 4 aluminum case fan is turning fast but not so fast im gonna test it.
Last edited by melih; 12-19-2020, 04:40 PM.Comment
-
Re: Logitech Z506 power supply
Don't run 12V fan at 19V. Also, my first suggestion would have been ghetto mod with a fan.Hell guys now i refreshed thermal paste on the aluminum board and plus i addes fan inside the box lets what will happen if it continue like that im gonna change both chips. Hopefully its not goes this way Thank a lot i didint feel alone on this way I forgot to take photos but i used old model 12 vold DC fan along with Pentium 4 aluminum case fan is turning fast but not so fast im gonna test it.
But wanted to approach the problem intelligently.Useful conversions. I don't "speak" imperial. Please use metric, if you want to address me.
1km=1000m=100000cm, 1inch=2.54cm, 1mile=1609.344meters, 1ft=30.48cm 1gal(US)=3.785liters, 1lb=453grams, 1oz=28.34gramsComment
-
Re: Logitech Z506 power supply
How i can downgrade 19 volt to 12 volt i could do i searched but didint understand from pages or selling some products has eligible to adjust voltage exit.Comment
-
Re: Logitech Z506 power supply
Result is same guys im gonna buy freezer spray and test it which one get defected.Comment
-
Re: Logitech Z506 power supply
This is not a bad idea, but you can also find the faulty one with IR termometer or multimeter with K type temperature probe.
You either use 7812 Voltage regulator or resistor divider or just a second 12V power adapter. Or if you prefer buck converter.Last edited by televizora; 12-19-2020, 07:33 PM.Useful conversions. I don't "speak" imperial. Please use metric, if you want to address me.
1km=1000m=100000cm, 1inch=2.54cm, 1mile=1609.344meters, 1ft=30.48cm 1gal(US)=3.785liters, 1lb=453grams, 1oz=28.34gramsComment
-
Re: Logitech Z506 power supply
Hi, Forum now i found replacement power supply for same sound system here is details this one dont have malfunctions and output is 16,7 volt. Is it correct.Comment
-
Re: Logitech Z506 power supply
Here update guys i Fixed the power supply with almost same qualifications but somehow my bass quality dropped other amfi system works fine just bass not satisfying my requirementsComment
-
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
Opened it up and discovered the power supply is making a faint clicking or ticking sound.
I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles... -
Hello Everybody,
Trying to repair a power supply from a Russound CA4 Multizone Controller (picture attached)
Russound no longer supports it but were kind enough to provide a schematic of the power supply (pdf attached).
The outputs marked 12v and 20v are all measuring only 1v.
The board is clicking, which I think means it is in something called hiccup mode when the flyback transformers switches because of an internal problem or something else on the board Overloading it.
The capacitors physically look clean (no bludgesor leaks) and...
Comment