Re: defective PS section of DVD reader
Ok, that's what I need to know.
Many thanks, BR, Francesco....
ammagamma
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Last Activity: 11-14-2011, 12:26 PM
Joined: 11-09-2011
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Re: defective PS section of DVD reader
I found Nippon Chemi-Con cap, attached datasheet. Could it be right? I did not find a cap with 105 °C with the same specs.
My only doubt is that the ripple current is 71 mA instead of 70 mA, I think that 1 mA difference is insignificant, but I want to be sure.
Thanks again, BR, Francesco....Leave a comment:
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Re: defective PS section of DVD reader
Ok, noted!
Thanks a lot, I will purchase 2 caps with these parameters and a 30W iron (I did not find a 25W with low cost), trying to improve the soldering ;-)
BR, Francesco...Leave a comment:
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Re: defective PS section of DVD reader
Ok, now it's clear. Also I cannot understand the measurement unit. It was reported "F" but it seems to me too high capacity...
So, 70 mA rms @ 85 °C and 120 Hz.
Many thanks for your help.
BR, Francesco...Leave a comment:
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Re: defective PS section of DVD reader
Hello Evil, thanks for reply.
For sure, I can do a better soldering, but it seems that I used a too high watt iron, 40 W, and a tin provided with flux. This flux probably has been burned by too high temperature coming from the iron or it is a poor quality flux so that what you can see are not "voids" or not completely soldered joint, but burned flux. This is likely what you define "dirty tip"
In any case, I shall solder again the IC with a new iron, 30 W, and a new tin.
...Leave a comment:
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Re: defective PS section of DVD reader
Hella Agent24, your explanation was crystal clear! I will follow your suggestion and the video you linked ;-)
BR, Francesco...Leave a comment:
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Re: defective PS section of DVD reader
Hello and thanks for reply, very useful!
Sorry for my poor knowledge, but in the datasheet I am not able to find the ripple current. My cap is 16x10 mm (LxD), but I do not understand what WV means in the table, could you please help me? It seems that this is the last parameter I miss.
BR, Francesco...Leave a comment:
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Re: defective PS section of DVD reader
Hello, thanks for reply.
regarding the soldering stuff, you're right, but it doesn't seem to be a cold soldering. The solderings are shiny enough despite of the photos, but the tin has poor quality and there are some "dark" point and for sure the solder tool is quite cheap!. However, I will try to improve the soldering.
Then, it seems that the C33 and C34, that is the red hot cap, are in parallel and by my POV they are voltage balancing cap.
I have just attached the cap...Leave a comment:
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Re: defective PS section of DVD reader
Hi, thanks for reply. The series is "GS", C546, 85°C. I attached the datasheet, I hope it is the correct one.
The damaged capxon cap is just 400V.
BR, Francesco...Leave a comment:
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Re: defective PS section of DVD reader
I made a mistake in the attachment manager, now u can see the photos.
Thanks, BR, FrancescoLeave a comment:
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Re: Capxon Capacitors?
Hello,
thank you for replies. Sorry if I was OT.
However, I opened another post:
[URL="https://www.badcaps.net/forum/showthread.php?p=195514#post195514"]https://www.badcaps.net/forum/showthread.php?p=195514#post195514[/URL]
Many thanks to those will help me!
BR, FrancescoRe: Capxon Capacitors?
Hello,
thank you for replies. Sorry if I was OT.
However, I opened another post:
[URL="https://www.badcaps.net/forum/showthread.php?p=195514#post195514"]https://www.badcaps.net/forum/showthread.php?p=195514#post195514[/URL]Leave a comment:
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defective PS section of DVD reader
Hello guys,
I detected a problem on the SHARP DV-SV92. It cannot be switched on and the stdby led was always switched off. I supposed it was a power supply issue, so I opened the chassis and found the stdby switching TNY267PN destroyed. It was even on the PCB but the package was destroyed and the PCB near this component was clearly darker that the original PCB colour. Then I replaced the stdby switching with a new one and the DVD reader got working, but the cap C34 was red hot! I cannot keep my finger on the top of the cap for more than a second! I disassemble the CAP and this is...Last edited by ammagamma; 11-10-2011, 04:12 PM. -
Re: Capxon Capacitors?
Hello guys,
this is my first time on this forum, quite useful!
I'm trying to repair the dvd reader Sharp dv-sv92: it cannot be switched on. I detected the problem in the stdby switching TNY267PN. I replaced it, all ok, but during the functioning I touched the top of the capXon cap (4,7uF400V) and it was red-hot! It seems to be very week!
Now, there is another cap with the same characteristics and both are part of the power supply section of the dvd reader. Do you suggest to replace even the other cap? Which cap brand...Last edited by ammagamma; 11-09-2011, 12:56 PM.Leave a comment:
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