Forum: Troubleshooting Computer Displays
Yesterday, 06:50 AM
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Replies: 72
Views: 29,403
Re: W241D (W240D) flickering Problem
+5v is sent from the computer graphics card via the DVI or HDMI cable to power the small i2c chips that contain a eeprom with supported resolutions etc even when the monitor has no external power....
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
Yesterday, 02:49 AM
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Replies: 5
Views: 118
Re: Asus P2B | Slot 1 + Pentium II | no power
Q9 is not a Mosfet, it is a Schottky diode
Test it with the multimeters diode test function, you should have a drop of ca 0.2v from pin 3 (anode) to the tab (cathode) and open in the other...
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Forum: General Electronics Technical Discussion
Yesterday, 01:37 AM
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Replies: 6
Views: 101
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
06-30-2022, 01:02 PM
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Replies: 143
Views: 18,476
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Forum: General Computer & Tech Discussion
06-30-2022, 11:33 AM
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Replies: 5,414
Views: 1,117,305
Re: best cheap/free scores 1.1
Yes they do look awesome with all those tubes!
I was near to get one but then got my senses together and realized where the heck was I going to have room for that big thing, it's crowded as it is...
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
06-30-2022, 11:28 AM
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Replies: 143
Views: 18,476
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Forum: General Electronics Technical Discussion
06-30-2022, 11:01 AM
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Replies: 6
Views: 90
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Forum: General Electronics Technical Discussion
06-30-2022, 10:15 AM
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Replies: 6
Views: 90
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Forum: General Electronics Technical Discussion
06-30-2022, 08:59 AM
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Replies: 30
Views: 257
Re: flourescent ballast resistance
It requires a ballast to work, otherwise it will burn out.
In your picture on the lamp it is written Osram Dulux S model 827, it has a G23 base.
From the datasheet we can see it is a 11W lamp...
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Forum: General Computer & Tech Discussion
06-30-2022, 03:55 AM
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Replies: 5,414
Views: 1,117,305
Re: best cheap/free scores 1.1
I could not find any specs either, only the output voltages.
Might be best to not start this up if the caps have not been reformed for 50 or so years, the series was introduced in 1958 according to...
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Forum: General Electronics Technical Discussion
06-29-2022, 05:40 AM
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Replies: 5
Views: 92
Re: What is this "processor"
Hello, please see this FAQ for how to insert photos in your posts:
https://www.badcaps.net/forum/showthread.php?t=1868
Have you checked the four discrete transistors Q1 > Q4 on the board to make...
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Forum: General Electronics Technical Discussion
06-29-2022, 05:21 AM
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Replies: 30
Views: 257
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Forum: Troubleshooting Computer Displays
06-29-2022, 04:31 AM
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Replies: 21
Views: 8,083
Re: Dell P2210f no power
Your photos are not usable, here is what I used instead: https://www.badcaps.net/forum/showpost.php?p=599033&postcount=30
I made one omission in my previous post: 12v does not seem to be for that...
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
06-28-2022, 06:20 AM
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Replies: 1,118
Views: 185,122
Re: ESR meter upgrades
You can see a photo of the top of the encoder in my original build photo way back in this thread: https://www.badcaps.net/forum/attachment.php?attachmentid=137396&d=1468518476
Here is how the bottom...
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Forum: General Electronics Technical Discussion
06-28-2022, 04:46 AM
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Replies: 18
Views: 243
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Forum: Troubleshooting Computer Displays
06-28-2022, 02:30 AM
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Replies: 21
Views: 8,083
Re: Dell P2210f no power
I would not buy from that seller because he mixed up the type of diode in the title of the AD vs the description!
"Ultra Fast Recovery Diode" vs "Standard General Purpose"
-Typical Chinese crap,...
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
06-27-2022, 12:28 PM
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Replies: 1,118
Views: 185,122
Re: ESR meter upgrades
I compiled a new build of Karl-Heinz firmware from the new GIT repository (https://github.com/kubi48/TransistorTester-source) a few days ago.
It works well on my GM328R, this time I only included a...
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Forum: Troubleshooting Computer Displays
06-27-2022, 02:54 AM
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Replies: 21
Views: 8,083
Re: Dell P2210f no power
In the original post of this thread you can find the service manual:
https://www.badcaps.net/forum/showthread.php?t=48690
I would replace both diodes with a matched pair of ultrafast diodes with...
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Forum: Troubleshooting Game Consoles & Other Weird Devices
06-27-2022, 02:15 AM
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Replies: 27
Views: 358
Re: Xbox 1.6 Motherboards and Polymer Capacitors
Well there is nothing inherently difficult with it:
You just measure the voltage on the different capacitors with the system running to see what voltage rails they are on...
For example the Pentium...
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Forum: Troubleshooting Computer Displays
06-26-2022, 11:14 AM
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Replies: 661
Views: 356,170
Re: Samsung Syncmaster 225BW
I would check the ESR of those surface mount electrolytic capacitors.
Probably after all these years with heat they are bad.
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Forum: Troubleshooting Game Consoles & Other Weird Devices
06-26-2022, 09:18 AM
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Replies: 27
Views: 358
Re: Xbox 1.6 Motherboards and Polymer Capacitors
It might be worth it to measure the voltage on those caps and if it is low enough use 2.5v 3300µF polymer caps:
They are not in old recommendations simply because they did not exist back then....
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Forum: General Electronics Technical Discussion
06-26-2022, 01:32 AM
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Replies: 18
Views: 243
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