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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Please help to identify burnt component
I hope anyone can help me to identify a couple of components please, I want to know if they are resistors or capacitor etc. and the voltage, because maybe I can replace them with another ones that doesn't look similar but with the same specifications, thank you in advance. please check the images in the link and click next to see all images:
https://www.facebook.com/photo.php?f...type=1&theater |
#2
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Please help to identify burnt component
On Monday, August 18, 2014 6:18:20 PM UTC-7, William Iglesias wrote:
I hope anyone can help me to identify a couple of components please, I want to know if they are resistors or capacitor etc. and the voltage, because maybe I can replace them with another ones that doesn't look similar but with the same specifications, thank you in advance. please check the images in the link and click next to see all images: https://www.facebook.com/photo.php?f...type=1&theater The "L35" and "L37" designations are for inductors (L :== inductor, C:= capacitor, R:== resistor) and are easily tested; if the resistance across them is near 0 ohms, they're fine. The other two purple-circled items are (if I'm reading the PCB markings correctly) C534 and C535, and your schematic identifies those as 10 pF, 50V, case size 0402 Those are all just intended to filter a VGA output so it doesn't radiate RF; there is NOTHING critical about the exact values used, which is why the 50V rating was applied (to a component that will never see more than 3V peak). It's also why the 'L35' position is identified without a component value, probably it was found to work just fine with a zero-ohm jumper in that spot (which saves a few cents). |
#3
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Please help to identify burnt component
On Monday, August 18, 2014 8:18:20 PM UTC-5, William Iglesias wrote:
I hope anyone can help me to identify a couple of components please, I want to know if they are resistors or capacitor etc. and the voltage, because maybe I can replace them with another ones that doesn't look similar but with the same specifications, thank you in advance. please check the images in the link and click next to see all images: https://www.facebook.com/photo.php?f...type=1&theater Thank you so so so much, for your help and for your patience to teach. if the inductors work just like jumpers that means they are not quite necessary right? Can I easily make a solder bridge instead? I'm just trying to find the replacement from scratch. thanks |
#4
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Please help to identify burnt component
In message ,
whit3rd writes On Monday, August 18, 2014 6:18:20 PM UTC-7, William Iglesias wrote: I hope anyone can help me to identify a couple of components please, I want to know if they are resistors or capacitor etc. and the voltage, because maybe I can replace them with another ones that doesn't look similar but with the same specifications, thank you in advance. please check the images in the link and click next to see all images: https://www.facebook.com/photo.php?f...&set=a.1020396 3399478102.1073741839.1615989191&type=1&theate r The "L35" and "L37" designations are for inductors (L :== inductor, C:= capacitor, R:== resistor) and are easily tested; if the resistance across them is near 0 ohms, they're fine. The other two purple-circled items are (if I'm reading the PCB markings correctly) C534 and C535, and your schematic identifies those as 10 pF, 50V, case size 0402 Those are all just intended to filter a VGA output so it doesn't radiate RF; there is NOTHING critical about the exact values used, which is why the 50V rating was applied (to a component that will never see more than 3V peak). It's also why the 'L35' position is identified without a component value, probably it was found to work just fine with a zero-ohm jumper in that spot (which saves a few cents). I would have thought that the feeds to a VGA screen would be shot-circuit-proof. If so, what caused them to burn out? -- Ian |
#5
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Please help to identify burnt component
The schematic you posted indicates the devices are capacitors -- not
inductors. I can see an inductor being fried -- but a capacitor? |
#6
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Please help to identify burnt component
On Tue, 19 Aug 2014 07:36:18 -0700 "William Sommerwerck"
wrote in Message id: : The schematic you posted indicates the devices are capacitors -- not inductors. I can see an inductor being fried -- but a capacitor? Didn't look at the picture - don't do Facelessbook. But ceramics can catch fire if across a power rail... |
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