Comments on: Clicking Noise in Computer ATX SMPS

By: hesham farouk

hesham farouk — Wed, 28 Dec 2022 09:27:10 +0000

using my email heshamfarouk370@gmail.com
i need datasheet jd3313d or equivalent
not found this ic in market in egypt

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By: Jaikumar Bidkar

Jaikumar Bidkar — Sun, 18 Apr 2021 20:30:16 +0000

Try 4 pins STR 5LO380R,
REMOVE 7 PIN IC You showing in last pics with red circle,
Just hook up 5L0380R
Pin 1 GND
pin 2 Hot (310v via TFR.
winding )
Pin 3 Vcc (connect 220k/1w.
Resistor from
+310V.& +Ve supply
From AUX. WINDING
(diode's +Ve side)
Pin 4 FEED BACK FROM OPTO
COUPLER pin 4 /
Ground pin 3 of
OPTO coupler
This will help you to clears
+5volt & +12volt (Stand by & Osc.voltages)

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 17 Apr 2021 08:49:48 +0000

In reply to Albert van Bemmelen.

Interesting fact!: Know that these Picosecond 'avalanche' superfast rise pulse generators also can be used in coax dsr measuring situations. See for instance these videos on that subject =>
https://www.youtube.com/watch?v=I1gfUNh5PJQ

https://www.youtube.com/watch?v=Il_eju4D_TM

https://www.youtube.com/watch?v=F-ZDiGmLvTs&t=4s

https://www.youtube.com/watch?v=8il3AGUkMM4

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By: Yogesh Panchal

Yogesh Panchal — Sat, 17 Apr 2021 07:29:22 +0000

In reply to Albert van Bemmelen.

Thanks! Albert,
This is exact Replacement..............

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 17 Apr 2021 07:21:38 +0000

In reply to Albert van Bemmelen.

oops: Most recent upgrade was v2.4 from the year 2017! So not 2021.

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 17 Apr 2021 06:10:06 +0000

In reply to Albert van Bemmelen.

Here another very small Jim Willams Picosecond pulser. The small pcb can be ordered in one order of 3 identical dual layer boards for just about US$6.65 free shipping (about 21 days delivery).See => https://oshpark.com/shared_projects/KrhgN8JM
and more info here. I believe that version 2.4 with date march 2021 was the latest version. (previous versions were also v2.4 but with older dates!)

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 17 Apr 2021 05:58:23 +0000

In reply to Albert van Bemmelen.

https://datasheetspdf.com/pdf-file/684442/EST/EST7502B/1

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 17 Apr 2021 05:54:59 +0000

In reply to Yogesh Panchal.

Understood Yogesh, I hope you will be able to find the culprit with the info in above given link. It also shows how to make a adjustable ATX SMPS powersupply and it looks like that the SR6110B chip is equivalent to a 7502B controller? Like you I also salvage wire, also very thin wire from relay coils and the thick copper wire from the deflection coil of crt TVs and of the demagnetize coil. The thin relay coil wire is always handy in various repairs.

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By: Yogesh Panchal

Yogesh Panchal — Fri, 16 Apr 2021 15:23:06 +0000

In reply to Marco.

Marco,
I tried on web site but link does not show any detail.
As per your advice i Emailed them a request for the Datasheet.

for drawing circuit it is bit time consuming right now i put it on hold till finish some urgent pending jobs.

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By: Yogesh Panchal

Yogesh Panchal — Fri, 16 Apr 2021 15:15:30 +0000

In reply to Parasuraman Subramanian.

Sir,
I am having 85% doubt on JD3313D IC Because this IC is directly involved in switching.....But i will try your idea for changing Capacitors.

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