Re: OCZ 700 Watt Bug Zapper Recap & Repair
I got the same model here, 700W. Similar situation: input cap was bad, I've replaced it. No big transistor or rectifier seems shorted. Stand-by rail outputs 5.16 V so that's OK, but it only twists when I try to turn on. Repeatedly. Lightbulb in series indicates no problem.
It's Sirtec platform for sure. I was also first thinking the FETs are bad, but they have 4R7 resistor between their gate and source pins which I think explains it. Or should I remove them as well to be sure? It would make sense something else was damaged because of the failed bulk capacitor…
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
yes, see if the short is still there.Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
leave it for now and go meter the pads on the board.Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
on the board
now i removed them, and i did this test
http://itrepairguide.com/how-to-test...th-multimeter/
when i connect the black probe to the drain and red probe to the source i get a reading of 623 (continuity setting) on both mosfet, but when i try to charge them up, black probe to drain, red to gate for a few seconds, when i move the red probe to the source, i do not get any beeping, and the multimeter give me a value of 127 (both mosfet)
i try this on a working fu9024n, and it is beeping.
what do you make of this?Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
maybe, did you test them on the board, or removed first?Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
thanks for the input,
i did some more testing and found 2 mosfet 20n60c3(q701 q702) when i set my multimeter to 200 homs, i get 5.5 between the gate (pin 1) and the source (pin 3), it means it is shorted no?Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
I think it should be connected, otherwise the pin would be severed from the rest of the path. According to datasheet it is drain, those four common are source. But the diode may have been already bad. Or something else. Now when it exploded you have to check every component in that circuit, something else may went bad during the blast.Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
here's a picture of the regulator i soldered yesterday
can someone tell me if i fucked up, on the red arrow i notice i made a connection between the diode and the regulator leg,
what does the white line underneath means (no connection?)Attached FilesLeave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
You never know what is the internal resistance of shorted PSU…there are always losses on the silicon (bridge rectifier etc.), thermistor and so on. But it is never so close to zero.
Initially the voltage on the bulb is very low, if the current is high than it heats the filament and as its resistance increases it takes most of the voltage. But it still lowers the maximum current (usually the initial resistance is couple tens of ohms) so much the unit is able to withstand it for the short time before the current drops to minimum.Last edited by Behemot; 11-30-2015, 05:31 PM.Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
Your nit-picking is quite annoying and uncalled for. With a shorted psu most if not practically all the voltage will be across the brightly lit series bulb with only a few volts across the psu. We are assuming a supply source of 120 VAC. So if for istance the bulb sees 115 VAC and the psu sees 5 VAC well then the tester is doing its job.Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
The voltage is not the most important aspect. The current limiting which the small-wattage bulb provides is important. A 60W bulb at 230 V has about quarter ampere going through which most power silicon handles.Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
You should be using a series light bulb tester to reduce the voltage to the power supply. It would have saved the chip from utter destruction. Since the psu still has a short circuit the voltage would have divided between the bulb and the psu with the bulb having the greater voltage across it.Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
oups!!
received my TNY278P (IC501) switching regulator this morning, so i installed it,
but as soon as i turned the power on, i heard a bang and saw some sparks inside the psu, the same part (ic501) had blown again, so i have to find what cause thisLeave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
here it is
i think it was the paper roll that was moving insideAttached FilesLeave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
use sidecutters to peel the edge of the can away from the rubber bung.
it may hiss when you first cut into it if pressure has built up.Leave a comment:
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Re: OCZ 700 Watt Bug Zapper Recap & Repair
Cut the sleeve, than usually cut the aluminium can by the the rubber sealing (or you may try to pry it out using small screwdriver). Remove the rubber and than the foil roll should go out. Or cut the can more to remove it.
Just be carefull to not cut yourself.Leave a comment:
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For today's thread, I have a KingWin ABT-650MM ATX PSU. Official web page with the PSU specs is still up and can be found here:
http://www.rmac.kingwin.com/products.../abt_650MM.asp
I just can't help it when I see a broken / for parts PSU on eBay that's listed for cheap and looks at least somewhat interesting. Well, OK, I won't lie – on the outside, this PSU looks anything but interesting. It's a plain gray box with colorful “spaghetti cables”.
What mostly drew me into buying it is its 2x PCI-E power connectors... -
I have purchased an 100-240v AC/5v 2a DC adaptor from aliexpress,and a month ago It smelled burning when I plugin it powerstrip.
Since then, This AC/DC adaptor have been out of order.
But A few days ago,I replace 0.5 watt resistor with 1 watt resistor(1ohm) in this adapter.
After replacing resistor,It succeed to recharge all of android phone.And When I measure voltage on the two pins of USB port,It shows 5.5v
Is it okay to replace 1/2 watt resistor with 1 watt resistor in AC/DC adapter?
And Is there any possibility that it will suddenly explode as well as to be out... -
Here’s another motherboard that needed a full recap: an ASUS P5GC-MX.
This one was gifted to me some years ago by user Pentium 4, along with a few other goodies. It actually came in working order with no bulging or leaking caps. However, I noted there were United Chemicon KZG caps everywhere on the motherboard. The CPU VRM output (CPU V_core) was the only exception: it had only 2x KZG. The rest was 6x UCC TMV 4V 680 uF caps… which aren’t any good news either.
So here is what the motherboard looked like with its original caps:
CPU VRM area up close…... -
65 Watt Multiple Output Global Performance Switchers
Condor Part Summary
• 65 Watt Wide Range Input
• High Efficiency (Up to 90%)
• Universal input 90-264 Vac
• 2-year warranty
• Also available in single outputs
• Conducted EMI complies with FCC Class B and CISPR 22 Class B (Commercial models) and CISPR 11 Class B (Medical models)
• Exempt from line harmonics standard EN61000-3-2
• Commercial Approved to UL1950, CSA-C22.2 No. 950,
• Medical Approved to UL2601-1, CSA 22.2 No. 601.1, and EN60601-1
•...10-07-2024, 05:46 AM -
So I got the bright idea to remove the LED light module from the fixture and put it on top of another enclosure and keep using the zapper
The removal of light module was a successful and now I just have to cut a hole in the enclosure and put a power cord that has an on and off switch on it
You are lucky to get about two years of service out of one before the LED module starts flicking and just stops working because it is mounted on an aluminum plate and these are hard to solder on it and it is not worth messing around with them and especially this one because it has line...
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