Re: Bestec ATX-1523F
OK now I repaired!
I replaced a total of 6 capacitors.
What was worse was the C14 10uF 50V, over 40 ohms of resistance!
I also changed the C12 (2.2uF 50V Jamicon) with a 2.2uF 100V.
Also changed:
C46 (10uF 50V Jamicon)
C45 (10uF 50V Teapo)
C35 (22uF 50V Jamicon)
C50 (220uF 25V Jamicon)
all replaced with Panasonic....
PC@live
Member
Last Activity: 05-01-2023, 01:10 AM
Joined: 03-17-2013
Location: Cremona
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Re: Bestec ATX-1523F
: Redface:Sorry, at the moment I am very busy, and I put in St.By the Bestec.
+ 5VSB 28V marks not!!!, but only 1,28V.
I checked and found OK the Q2, Q16 and Q17....Leave a comment:
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Shooting two enermax
Hi, I have two ENERMAX failure in repair, a PRO82 + and a EG565AX-VE.
In PRO82 + burned the THR1, is unreadable.
The Fusiblie is OK.
In the pictures are not known, but the R8 has a sign on the fusion with lead.
Maybe by replacing only the THR1, you might solve the problem.
However for security, I would like to remove R8 and put an insulator on the lead.
I checked on-board the primary and is not shorted.
In EG565AX-VE I vaporized fuse with D4 and Q2 shorted.
The D4 is a HFA08TB60 (600V 8A).
The Q2 is a IRFP460A (500V 20A).... -
Re: Blue Ring Tester Error???
Yes, I have both the diagrams.
In fact Blue R.T. it seemed strange that the transistor Q1 was an NPN.
Thank you very much
Greetings
...
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Re: Bestec ATX-1523F
Ok is a remedy that I'll keep in mind, when I won't have replacement capacitors.
For the time being I focus on secondary adapter.
There is a large part of the circuit and PS-ON 5VSB.
I don't know, maybe the capacitors are good, and the failure is due to something else (eg. IC3, SCR1, IC5, Q2).
Greetings
...
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Re: Blue Ring Tester Error???
Thanks a lot.
The question I had come because the Tester LOPT/FBT, Q1 was a PNP.
Greetings...Leave a comment:
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Blue Ring Tester Error???
[B]Blue Ring Tester Error???[/B]
Hi all, looking at the diagram of the testers, I noticed a mistake???
The Q1 = 2N3904 transistors in the "Parts List" is an NPN.
However, the schema is connected to +, so it should be a PNP???
(Perhaps 2N3906???)
If it is a write error (2N3904 transistors instead of 2N3906) then Q2 and Q3 are PNP???
If someone can explain to me, if there is an error.
Thank you so much who can help me to understand Yours[B]Blue Ring Tester Error???[/B]
Hi all, looking at the diagram of -
Re: Bestec ATX-1523F
Thanks for the tip.
The only question that remains is the lack of polarity
(+ and-) of film capacitors.
Greetings...
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Re: Bestec ATX-1523F
Thanks for letting me respond to your advice.
I wanted to clarify that are electrolytic capacitors.
Then you can replace them with those film?
Greetings...
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Re: Bestec ATX-1523F
Hello and sorry for the errors due to the translator.
I hope that this time will be able to make myself understood.
I wanted to say this:
I do not have replacement capacitors from 0.1 and 0.47 uF.
Can I retrieve other from 0.47 and 1 uF.
Can I replace those from 0.1 uF with those from 0.47 uF?
Can I replace those from 0.47 uF with those from 1 uF?
Greetings...
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Re: Bestec ATX-1523F
Thanks for the advice.
Unfortunately, this PSU is full of Jamicon, some are tiny (like 0.1 or 0.47 uF).
Also, I miss an ESR meter, but if I'm not mistaken, even having one, with so low, it is difficult to understand whether they are good or bad. Except the ESR has increased significantly.
To replace them, I could use some recovery, but those from 0.1 uF there are, alternatively I those from 0.47-1 uF, second or you can fit?
Kind regards...
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Re: Bestec ATX-1523F
Thanks for letting me respond.
Here are pictures of the PSU open:
[url]http://img855.*************/img855/8933/img0207xj.jpg[/url]
[url]http://img843.*************/img843/1432/img0213kg.jpg[/url]
[url]http://img545.*************/img545/6503/img0217rt.jpg[/url]
[url]http://img89.*************/img89/2020/img0218og.jpg[/url]
[url]http://img198.*************/img198/8894/img0221.JPG[/url]
[url]http://img268.*************/img268/4535/img0226h.JPG[/url]
[url]http://img27.*************/img27/6797/img0227wd.jpg[/url]...Last edited by PC@live; 04-05-2013, 08:09 AM.Leave a comment:
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Bestec ATX-1523F
Hi to all.
For ATX power supplies, Hobby shelter I have a dozen currently being repaired.
Among those in repair I have a Mini-ATX Bestec Model ATX-1523F 150W Max, I'd like to fix.
The power supply does not start, I note that tensions are low + 5VSB (Purple), 28V, +1 and PS-ON (Green) +1, 12V.
Within any swollen capacitor.
To create space I disassembled the double fin secondary diodes, which I checked to be good.
List them: CTX12S D13, D14, D12 F10P10Q CTB34.
Primary capacitors are n° 2 330μF 250V CapXon. In the secondary have no. 3 VENT 680μF... -
Re: New Members - please post your introductions here
Hi to all. I'm Italian, I apologize in advance for writing errors.
I started with the PC in 1990, in the Office there was a 8086 XT Disitaco, a 12 MHz with TURBO button inserted, 8087 coprocessor and 10 MHz, 1 MB RAM.
In 1992 I bought my first PC AT: a 80386 33 MHz, AMD in 1996 changed the M.B. with an AMD 80486 DX2 66 MHz, idem in 1998 with a CYRIX MII 300, and in 1999 with a Celeron 400 MHz S370.
After a few years I changed the CPU with a 433 MHz, and finally with a 500 MHz. This PC AT Celeron 500,...Leave a comment:
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