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#21 | |
Quiet observer
Join Date: May 2010
City & State: Central Florida
My Country: USA
I'm a: Hobbyist Tech
Posts: 88
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#22 |
Leaking Member
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,219
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![]() if you see a regulator, change the caps surrounding it too.
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#23 |
Quiet observer
Join Date: May 2010
City & State: Central Florida
My Country: USA
I'm a: Hobbyist Tech
Posts: 88
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![]() I may need some help in identifying if the board has a regulator. Would that be one of the IC chips that I listed in an earlier post? Or is it something else on the board? I have pictures of the board in an earlier post.
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#24 |
Badcaps Veteran
Join Date: Jul 2011
City & State: Some times Sunny Jacksonville FL
My Country: USA
Line Voltage: 120 Volts 60 HZ
I'm a: Knowledge Seeker
Posts: 3,654
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![]() I would definitely recommend doing the ones right next to these chip but ones you get working correctly I would highly recommend that you recap the hole board
As far as the regulator ic chip you would have to look up each part to what kind a chip it is
__________________
9 PC LCD Monitor 6 LCD Flat Screen TV 30 Desk Top Switching Power Supply 10 Battery Charger Switching Power Supply for Power Tool 6 18v Lithium Battery Power Boards for Tool Battery Packs 1 XBox 360 Switching Power Supply and M Board 25 Servo Drives 220/460 3 Phase 6 De-soldering Station Switching Power Supply 1 Power Supply 1 Dell Mother Board 15 Computer Power Supply 1 HP Printer Supply & Control Board * lighting finished it * These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10% 1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later ) 2 Hem Saw Computer Stack Board All of these had ![]() All of the mosfet that are taken out by bad caps ![]() Last edited by sam_sam_sam; 07-05-2020 at 05:47 PM.. |
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#25 |
Quiet observer
Join Date: May 2010
City & State: Central Florida
My Country: USA
I'm a: Hobbyist Tech
Posts: 88
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![]() I found a regulator. It is a LM2575T. I will be tracing down the caps that are next to it.
It may be next week sometime before I have any results, but I will post what I find. |
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#26 |
Quiet observer
Join Date: May 2010
City & State: Central Florida
My Country: USA
I'm a: Hobbyist Tech
Posts: 88
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![]() I finally replaced all ten of the various aluminum radial electrolytic capacitors on the board. The only ones that seemed out of spec. were the smallest ones - 22uF 16V ones, which were blue and made by JiangHai. There are 6 of these on the board. Some of them had very high ESR values. I have been running it for a few days now with the new caps and it is no longer beeping. So I am thinking that they were the cause of the intermittent beeping I experienced. Thank you to everyone who helped me with this fix.
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#27 |
Leaking Member
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,219
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![]() good to hear that you had success!
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#28 |
Badcaps Veteran
Join Date: Jul 2011
City & State: Some times Sunny Jacksonville FL
My Country: USA
Line Voltage: 120 Volts 60 HZ
I'm a: Knowledge Seeker
Posts: 3,654
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![]() I am glad you got it back up and running
On this voltage regulator what was on the next line was it a 5 or was it 12 this tell you what what voltage is Now if it not have anything then it adjustable type Last edited by sam_sam_sam; 09-05-2020 at 04:40 PM.. |
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#29 |
Quiet observer
Join Date: May 2010
City & State: Central Florida
My Country: USA
I'm a: Hobbyist Tech
Posts: 88
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![]() Sorry Sam_sam_sam,
I don't know what was printed on the next line on the regulator. It is all back together now, and I can't see that part. And it is not easy to get it apart. |
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