Re: Infocus In3116 Projector Power Supply
Broken solder joints? It was the bulb ballast, but has been replaced, when i put in the working power supply the projector works just fine..
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Infocus In3116 Projector Power Supply
Hey guys, I have two of these in3116 projectors with bad power supplies, and one that works good that i can reference to. I started with the obvious, the fuse is good, past that can someone help me troubleshoot some parts? Here are a couple of pictures from both sides....
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Re: Energy s10.3 subwoofer issues
Well tracing back the gate driver I came to a transistor but it tests out okay. And yeah both MOSFET have the same p/n
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Re: Energy s10.3 subwoofer issues
Okay waiting for further instructions.. i assumed the mosfet's were fried by another component as it seems strange both would go out at the same time
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Re: Energy s10.3 subwoofer issues
Hey guys, holidays are finally over and I got back to my project. I desoldered both of the MOSFETs and all pin combinations read around 1.3 ohms. Is it possible both of them shorted out, or did something else on the pcb cause this? I am going to go head and order new ones.Last edited by soulraver; 01-03-2014, 02:28 AM.
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Re: Energy s10.3 subwoofer issues
Oh i apologize its been a long week, P/N's are A - IRF640 I↓R 639p and B is the same
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Re: Energy s10.3 subwoofer issues
Yeah I saw the P/N request, but I am somewhat new to this and trying to learn, so I am unsure what P/N testing is? I know devices A and B are output devices, am i testing the resistance of each device using the + - points you have pointed out?
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Re: Energy s10.3 subwoofer issues
Okay guys i followed your advice and removed the bridge rectifier (very much so a pain to remove), the ohm readings are all the same on the points except where i was getting 2.0 ohms on 1&4 and 2&3, are now reading infinite ohms, guessing open circuit.. on the board i tested where 1&4 solder on the board and it is 2.0 ohm's still, at 2&3 it is infinite..
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Re: Energy s10.3 subwoofer issues
Okay i finally got around to getting some readings
1 & 2 = 110k
1 & 3 = 104k
1 & 4 = 2.0
2 & 3 = 2.8
2 & 4 = 15.5k
3 & 4 = 15.5k
Iv never done a p/n test, not sure what exactly i should be doing on that on? is that the same as testing a diode?
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Re: Energy s10.3 subwoofer issues
Awesome! I have finals this week so it will have to wait until Friday, but thank you so much I will reply back when i get all the readings! Thank you.
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Re: Energy s10.3 subwoofer issues
Sure here it is, bottom of picture is the side of the fuse from the top...
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Re: Energy s10.3 subwoofer issues
No problem, here are few shots of the amp. There is a second board under this one that is the high pass crossover. I unplugged it to rule it out and the fuse still blows. Let me know if you need any close up pictures or anything else. Thank you for the quick reply
(There is two very large heat sinks connected to both sides of the board)...
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Energy s10.3 subwoofer issues
Hey guys I am attempting my first fix of a powered amplifier, I was hoping to get some input on diagnosing the issue. The amp blew a fuse, and continues to blow fuses anytime i put one in. I unplugged the PT output wires, put a fresh fuse in.. what type of testing should i do? Output voltage from the PT is 30v. The sub has a Off / Auto / On switch, even when in the off position the fuse blows, visually everything on the board looks good, no leaking caps, burnt resistors, etc. I am somewhat new to all this so i apologize for thatLast edited by soulraver; 12-09-2013, 02:53 PM.
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Re: New Members - please post your introductions here
Hey guys, my name is Ryan, I am a student at WSU in Washington. I like fixing and tinkering electronics on free time, so far i have just been replacing larger components and a few capacitors here and there. My soldering skills are somewhat limited but i am learning. I joined to try and expand my skills and knowledge in this field. Thank you for this forum.
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