...again, I don't know smd caps so please enlighten me.
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Re: Music server motherboard caps
you can tell if they have leaked, heat one leg with your iron.
if it stinks like cat piss then it's leaked.Leave a comment:
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Re: Music server motherboard caps
The 3 caps marked 220, 10A, 3G6 are part of the component video circuit, which is not working. S-Video works so it's not a huge deal, but are those electrolytics? Can you help me decipher the codes?
Also, the 41, 470, 16V... They look to me to be 470uF @ 16V electrolytics, correct?Attached FilesLeave a comment:
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Re: Music server motherboard caps
I'm comfortable with the soldering part so that's not a problem, but...it is an obsolete, unobtainium board. So I have two schools of thought on cap replacement:
1) replace the electrolytic caps that "may" be bad before they damage the board
2) do what you suggest and leave it alone since the motherboard can't be replaced
Which is a higher risk?Leave a comment:
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Re: Music server motherboard caps
if it works, leave it.
most people cant lift surface-mount electrolytics wihout damaging the board or making the caps explode.Leave a comment:
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Re: Music server motherboard caps
Yep, the power supply is working great both in test and connected to the server. The server is currently buttoned back up and working. I'm just looking for advice on the mobo caps. I never really worked with SMD caps so I don't know how to identify an electrolytic 100% of the time. I know, at least on some, there's scores on the top of the can for controlled venting similar to thru-holes. I'm pretty sure I know how to identify the values, but again, not 100%. As far as failed, solder joints can look corroded, cans can bulge, they can leak, etc. Looking at my mobo, I see no overt signs of bad caps, but that's not proof they aren't bad.Last edited by Cohibaman; 01-25-2015, 02:49 PM.Leave a comment:
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Re: Music server motherboard caps
Can you test the power supply without the main connectedLeave a comment:
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McIntosh MS300 Music server motherboard caps
I recently purchased a used McIntosh MS300 music server built in 2005. It's a PowerPC-based motherboard, CD-ROM, and hard drive powered by a small 65-70W switching power supply.
The power supply notoriously fails due to bad/old caps, then usually takes out the mobo. When I popped the hood, I did in fact notice a 1000uF filtering cap was bulging (later tested at 47pF), so I promptly replace all the thru-hole electrolytic caps on the power supply with Panasonics and a few Nichicons. Everything good so far.
I'm now focusing on the motherboard, which uses all surface mount caps. Any advice on whether I should I replace these as well...?Attached Files -
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hello,
First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.
I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.
I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
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I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
Hi there,
Guys anyone here can help me. During troubleshoot the motherboard, my 1st and new psu unable to boot the motherboard. Even though i set the 20V, my old Compaq CQ42 motherboard had the led white light at charging port. When press on button, the led blinking to red and gone back to white state. But i change the oem hp compaq adapter which is i measure 19.45V. Using that can boot the motherboard and fan spinning. Then i reconnect psu and tried set the 19.45V, still blinking red. Anyone know what happen? Is it psu not compatible? All is check and voltage is there....
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