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Search: Posts Made By: Per Hansson
Forum: Troubleshooting Computer Displays Yesterday, 01:03 PM
Replies: 12
Views: 243
Posted By Per Hansson
Re: Eizo S2000 suddenly died

It's alive!
I made one more test with the voltage regulator U1:
I connected a 100ohm resistor across the fuse to give it a small load.
Just to make sure that was not why it was not regulating...
Forum: Troubleshooting Computer Displays Yesterday, 04:57 AM
Replies: 12
Views: 243
Posted By Per Hansson
Re: Eizo S2000 suddenly died

Hold your horses!
Fuse F3 on the LVDS board measures open!
So I started it up and measured the test point "V33" on the board that sits behind the other fuse F2 via voltage regulator U2 and sure...
Forum: Troubleshooting Computer Displays Yesterday, 04:22 AM
Replies: 12
Views: 243
Posted By Per Hansson
Re: Eizo S2000 suddenly died

Yes there is a T-Con board, unfortunately it is soldered directly to the LCD's flat flex...
I might try something a bit crazy though:
I have some video boards from an Acer AL2423W...
Forum: Troubleshooting Computer Displays 05-20-2022, 02:19 PM
Replies: 12
Views: 243
Posted By Per Hansson
Re: Eizo S2000 suddenly died

Thanks, there does seem to be activity.
There is also activity on the small programming port (or whatever it is) with designation CN801
I also measured all crystals directly now (and not via...
Forum: General Capacitor Questions & Issues 05-20-2022, 01:16 PM
Replies: 2
Views: 95
Posted By Per Hansson
Re: Filter Cap AC Ripple Questions

It is completely normal if there is no more active filtering.
I.e. if you just have a bridge rectifier and a cap you will have ripple.
The amount depends on the size of the cap and the connected...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-20-2022, 01:10 PM
Replies: 36
Views: 780
Posted By Per Hansson
Re: Cyberpower CP900EPFCLCD - F03 Error

Yes, just plug it in now, the lamp is allowed to flash once bright as the caps charge.
After that it should be quite dim.
If it is bright then it is expected something is still shorted.
Forum: Troubleshooting Computer Displays 05-18-2022, 11:28 AM
Replies: 12
Views: 243
Posted By Per Hansson
Re: Eizo S2000 suddenly died

Sorry maybe I was not clear, I meant that I don't think the issue is in the EDID data with my previous message.
However I got a bit intrigued and used Entech Taiwan's Monitor Asset Manager...
Forum: Troubleshooting Computer Displays 05-17-2022, 12:17 PM
Replies: 12
Views: 243
Posted By Per Hansson
Re: Eizo S2000 suddenly died

Thanks for your reply!
I did not disassemble the monitor that far yet to reach them but I did now.
Must say this monitor has a really nice construction!
But I could see no difference in the...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-16-2022, 01:44 PM
Replies: 36
Views: 780
Posted By Per Hansson
Re: Cyberpower CP900EPFCLCD - F03 Error

The "T" in "TAPc" could stand for "Time Delay" i.e. a slow blow fuse.
But none of those letters really make sense so could just be production numbers...
If you try with a quick blow fuse you don't...
Forum: Troubleshooting Computer Displays 05-15-2022, 02:56 PM
Replies: 12
Views: 243
Posted By Per Hansson
Eizo S2000 suddenly died

Hello, my trusty old Eizo S2000 LCD monitor suddenly died as I was using it the other day.
The picture quality started degrading and a few seconds later washed out completely, see attached photos....
Forum: Troubleshooting Power Supplies and Power Supply Design 05-15-2022, 02:42 PM
Replies: 22
Views: 1,979
Posted By Per Hansson
Re: Dell 2700w j728n 3kVa UPS not starting

That looks like it would be based on an old iron transformer since it weights 2.3KG.
So I'd say that is a proper charger :)
Forum: Troubleshooting Power Supplies and Power Supply Design 05-15-2022, 12:43 PM
Replies: 22
Views: 1,979
Posted By Per Hansson
Re: Dell 2700w j728n 3kVa UPS not starting

"Smart charger" well that is probably the definition of the word oxymoron if you look it up in a dictionary!
If you have a "stupid" charger then try that, if not it might be worth getting one.
(You...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-15-2022, 12:35 PM
Replies: 36
Views: 780
Posted By Per Hansson
Re: Cyberpower CP900EPFCLCD - F03 Error

Yes exactly, just connect it where the fuse was before.


Cut away the heatshrink tubing from the old fuse and read what it says on the ends: there are fast and slow fuses and it is important to...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-15-2022, 12:42 AM
Replies: 36
Views: 780
Posted By Per Hansson
Re: Cyberpower CP900EPFCLCD - F03 Error

Great, I would replace this fuse with an old incandescent 40w or 60w light bulb.
If this bulb turns on bright when you turn the UPS on you still have a big problem somewhere.
You can of course skip...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-15-2022, 12:26 AM
Replies: 22
Views: 1,979
Posted By Per Hansson
Re: Dell 2700w j728n 3kVa UPS not starting

Anything that simulates such a large battery voltage is going to be prohibitively expensive.
Have you actually tried to charge each battery separately on a good charger and see what happens?...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-14-2022, 04:48 PM
Replies: 36
Views: 780
Posted By Per Hansson
Re: Cyberpower CP900EPFCLCD - F03 Error

Yes, could also be that the bridge rectifier BD1 is broken, so check if you have input AC voltage on it.
Forum: Troubleshooting Power Supplies and Power Supply Design 05-14-2022, 12:01 PM
Replies: 36
Views: 780
Posted By Per Hansson
Re: Cyberpower CP900EPFCLCD - F03 Error

Yes exactly, start there and then we can look at the rest.
Forum: Troubleshooting Power Supplies and Power Supply Design 05-14-2022, 08:45 AM
Replies: 36
Views: 780
Posted By Per Hansson
Re: Cyberpower CP900EPFCLCD - F03 Error

Yes proper standby charge voltage for a lead acid battery is around 13.7v and charge voltage is around 14.7v
Now that you replaced the Viper have you checked what voltages you have on the capacitors...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-14-2022, 03:41 AM
Replies: 31
Views: 819
Posted By Per Hansson
Forum: General Electronics Technical Discussion 05-10-2022, 11:10 AM
Replies: 35
Views: 528
Posted By Per Hansson
Re: Line filter question

As redwire mentioned above there exists medical rated version for inlet filters.
They omit the Y capacitors, for example I recently bought a Schaffner FN9222E-1-06 filter.
The medical version of...
Forum: General Electronics Technical Discussion 05-10-2022, 10:51 AM
Replies: 35
Views: 528
Posted By Per Hansson
Re: Line filter question

It is normal to have a small difference because there is no load on the earth wire.
There can also be different lengths of cables and some differences in resistance due to not great contacts...
Forum: Troubleshooting Game Consoles & Other Weird Devices 05-09-2022, 01:31 PM
Replies: 106
Views: 18,502
Posted By Per Hansson
Re: Post your worthless and/or pointless repairs

It is similar in Swedish.
It means full throttle or idle (speaking about a cars combustion engine).
Forum: General Electronics Technical Discussion 05-09-2022, 11:04 AM
Replies: 35
Views: 528
Posted By Per Hansson
Re: Line filter question

Please stop before you kill someone!
Forum: Troubleshooting Game Consoles & Other Weird Devices 05-09-2022, 11:00 AM
Replies: 106
Views: 18,502
Posted By Per Hansson
Forum: Troubleshooting Power Supplies and Power Supply Design 05-08-2022, 10:44 AM
Replies: 5
Views: 138
Posted By Per Hansson
Re: Seasonic dead after wrong SATA power cable

Ok, if you do not even have 5v standby working you will have to start from the beginning: measure the voltage on the big main filter capacitor.
It should be around 325v DC with 230v AC input.
If...
Showing results 1 to 25 of 500

 
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