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Search: Posts Made By: Per Hansson
Forum: Troubleshooting Audio Equipment 09-05-2022, 01:00 PM
Replies: 127
Views: 1,662
Posted By Per Hansson
Re: Help with blowing transistor NAD T752 receiver

Yup that looks to be the same size to me also, another very important factor is how well they are attached to the heatsink, some cheap crap is made very poorly but this looks soldered so I'd say they...
Forum: Troubleshooting Audio Equipment 09-05-2022, 12:48 PM
Replies: 446
Views: 145,886
Posted By Per Hansson
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Ok, I have no idea then what the issue can be.
Forum: Troubleshooting Audio Equipment 09-04-2022, 10:44 AM
Replies: 127
Views: 1,662
Posted By Per Hansson
Re: Help with blowing transistor NAD T752 receiver

I would take your current destroyed parts and open them up:
You have one original from the unit and the one you bought.
Open them both and see if the die is the same physical size.
If it is not...
Forum: Troubleshooting Power Supplies and Power Supply Design 08-27-2022, 05:14 AM
Replies: 6
Views: 264
Posted By Per Hansson
Re: Liteon PS-6251-2H8 - Top222 - 5VSB >> 6.2V!

Well, take note that this chip is not a fixed 5v regulator.
So any failure in the feedback path (they call it "control" in the datasheet) could make the 5VSB higher or lower, depending on what...
Forum: Troubleshooting Audio Equipment 08-26-2022, 12:29 PM
Replies: 446
Views: 145,886
Posted By Per Hansson
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Well you can just measure and compare what voltages you see on the ports with no input vs the other working set that did not have the issue with the shorted post.
Possibly one of the op-amps is...
Forum: General Electronics Technical Discussion 08-22-2022, 10:00 AM
Replies: 44
Views: 1,364
Posted By Per Hansson
Re: MIG-130 feed motor PCB GI-PCB-H59-A0 repair (old: Help me with capacitor replacem

Nice work!
I changed the thread title to make it more visible for Google searches...
Forum: General Electronics Technical Discussion 08-21-2022, 12:59 PM
Replies: 44
Views: 1,364
Posted By Per Hansson
Re: Help me with capacitors replacement

With my previous post here (https://www.badcaps.net/forum/showpost.php?p=1156133&postcount=19) doing a Google search you can find this page linked below for example.
That was why I wrote this welder...
Forum: Troubleshooting Audio Equipment 08-20-2022, 09:29 AM
Replies: 446
Views: 145,886
Posted By Per Hansson
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Yes, better to keep this thread focused on only the Alesis M1 MK2 speakers.
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 08-17-2022, 07:36 AM
Replies: 6
Views: 350
Posted By Per Hansson
Re: Replace memory module with lower density

Possibly you could get it working by flashing a BIOS of a card that actually have the same or lower amount of memory as what you installed.
You can look in the Techpowerup GPU BIOS database for one.
Forum: General Computer & Tech Discussion 08-16-2022, 12:46 PM
Replies: 8
Views: 1,352
Posted By Per Hansson
Re: Looking to buy a new laptop computer for doing 3D drawing software for a 3D print

Have you tried to install the official Lenovo sound drivers?
I made a clean install on mine when it was brand new (an older model than yours) and it always sounded like shit.
Then for some reason I...
Forum: Troubleshooting Audio Equipment 08-16-2022, 10:48 AM
Replies: 446
Views: 145,886
Posted By Per Hansson
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Yea there must be something odd with the Behringer to cause that.
I guess you could try e-mailing or calling them to see if they have any ideas.
Forum: Troubleshooting Audio Equipment 08-16-2022, 08:21 AM
Replies: 446
Views: 145,886
Posted By Per Hansson
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

The voltages you should have on C8 and purple to green you can measure when the Behringer is not connected...
But to get a pretty good idea you can look at the picture in this sticker ;)...
Forum: Troubleshooting TVs and Video Sources 08-15-2022, 01:47 PM
Replies: 31
Views: 1,796
Posted By Per Hansson
Re: Phillips 50PF7321D/37 Plasma slow reboot

The likely component would be a capacitor, but it can be any component really, or even a solder joint.
You might be able to narrow it down further by doing more localized heating of components and...
Forum: General Electronics Technical Discussion 08-15-2022, 09:40 AM
Replies: 24
Views: 855
Posted By Per Hansson
Re: Old analog Power Supply needs your advice

The transformer is missing.
Forum: Troubleshooting Audio Equipment 08-15-2022, 09:37 AM
Replies: 446
Views: 145,886
Posted By Per Hansson
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Ok, no I have no idea why that might be, it does seem very strange!
If you want to trouble shoot it further you could measure the voltage across C8 when it happens.
Or perhaps better: the output...
Forum: General Electronics Technical Discussion 08-15-2022, 08:03 AM
Replies: 44
Views: 1,364
Posted By Per Hansson
Re: Help me with capacitors replacement

I don't know where you got "grooves" from, I said traces.
You need to remove the traces according to the picture in my post.
Otherwise the clearance is too small and it will just arc over again....
Forum: Troubleshooting Audio Equipment 08-15-2022, 07:53 AM
Replies: 446
Views: 145,886
Posted By Per Hansson
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Does the Behringer work with any other speakers?
And does the same thing happen with both speakers or only one of them?
If only one of them, is it the same speaker as you mentioned in this quote:
Forum: General Electronics Technical Discussion 08-14-2022, 08:54 AM
Replies: 44
Views: 1,364
Posted By Per Hansson
Re: Help me with capacitors replacement

Yes sure, I'd pick the one with the longer legs, just because I could not find a datasheet for the other one.
Forum: General Electronics Technical Discussion 08-14-2022, 06:41 AM
Replies: 44
Views: 1,364
Posted By Per Hansson
Re: Help me with capacitors replacement

It does not matter, the original is only rated for 2A so it should be more than that.
But any bridge rectifier you have in that large package I showed is going to be rated for more than that...
I...
Forum: Troubleshooting & Designing Networks 08-14-2022, 04:37 AM
Replies: 41
Views: 1,038
Posted By Per Hansson
Re: broadband ut300r2u modem,link light stays on forever

Post the output you do get in PuTTY with CODE tags, maybe something can be understood from it.

https://www.badcaps.net/forum/attachment.php?attachmentid=271152&stc=1&d=1660473423
Forum: General Electronics Technical Discussion 08-14-2022, 04:19 AM
Replies: 44
Views: 1,364
Posted By Per Hansson
Re: Help me with capacitors replacement

Just noticed your board is unmarked but the one linked by petehall347 in reply #3 has markings on it.
The board is apparently for the wire feeder motor in the welder, and from what others wrote on...
Forum: General Electronics Technical Discussion 08-14-2022, 03:34 AM
Replies: 44
Views: 1,364
Posted By Per Hansson
Re: Help me with capacitors replacement

Check the attached photo, the clearance is a joke!
I would put a regular bridge rectifier like I have shown if there is room for it.
Then remove the traces so the clearance between them is more...
Forum: General Computer & Tech Discussion 08-13-2022, 06:37 AM
Replies: 2
Views: 1,207
Posted By Per Hansson
Re: win7 bs

Usually it it because of both missing certificates and possibly the SHA2 compatibility updates for Windows Update, required since around 2020 some time.
You can install the updates under...
Forum: Troubleshooting Computer Displays 08-13-2022, 02:31 AM
Replies: 4
Views: 346
Posted By Per Hansson
Re: Acer X223HQ (Version Bbd) on/off-power-cycling

The 8-pin connector between PSU and Main PCB and any large / heavy components like transformers big capacitors etc
Forum: Troubleshooting Audio Equipment 08-10-2022, 11:29 AM
Replies: 446
Views: 145,886
Posted By Per Hansson
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Great! :)


No this capacitor is not as important, based on its location in the schematic it is there to provide an initial change in the base voltage to transistor Q7, changing the feedback...
Showing results 1 to 25 of 500

 
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