Re: Rosewill RP550-2-S
i hope you will complete the primary filter as well.... jumper wire bad! components good!
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Rosewill RP550-2-S
Here is a newly acquired Rosewill RP550-2-S. Everything looks as cramped as an Antec Smartpower. Powered it up.....5vsb is dead. Uses one of those #@$%&* two transistor circuits. Fuse checks good, and DC voltage at main capacitors looks good. So here are some pictures. The case has a shiny chrome mirror like finish. Too bad it looks better than it works!Attached Filesif you find these attachements useful please consider making a small donation to the site
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Rosewill 1200w blown APFC? Mosfet.
I got this with a blown fuse. Replaced fuse and the APFC mosfet blew.
Removed the mosfet and got 5VSB, then when I connected PWON to ground the Fuse blew again.
So do I need to replace the mosfet? Or should I be looking elsewhere? Thanks.
According to a review of the 1500w unit there is an option for 4 transistors instead of 3 and they are different: https://www.tomshardware.com/reviews...su,4823-3.html
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Rosewill RV-600 power supply shut down PC today.
Tested it using my power supply tester.
12V supplies were 11.8V and -12V was -11.1V
Replaced bulging C12, was a 1000μfd 16V. Replaced with 25V rated cap.
Tweaked up the +12V using the only trim pot on the board. the -12V came up to -11.4.
Cooling fan was close to seized, cleaned/lubed the bearing/shaft.
Reinstalled. Working good.
PC seems much faster after badcap was replaced.07-15-2020, 12:53 PM -
I'm trying to extract a flashable bios file(ch341a) from the lenovo bios executable download. I have tried the instructions from this site https://starkeblog.com/lenovo/uefi/2...pdate-exe.html, which are not working. According to those instructions, after issuing the commandit should create an \app folder, inside which, I should find a newly created "7wcn38ww.exe" file. I should then be able to extract that using 7zip and find my .FD file.Code:
"innoextract 7wcn38ww.exe"
The trouble I'm having is that I'm not getting the newly... -
Hello everyone,
I am requesting urgent assistance to unbrick my laptop, a rebranded TongFang GK7MRFR chassis. The laptop is completely dead following a faulty in-OS EC flash attempt.
I have successfully used a CH341A programmer and can read/write/verify both flash chips, but using my backups/extractions has failed to restore power. The root cause is likely a corrupted Intel Management Engine (ME) region or an incompatible EC/BIOS pairing. System & Hardware Details- Barebone / Chassis: TongFang GK7MRFR
- MB: MB: GK5MP5X V1.0 Prod :GK5MRFV10T04201310281
- Rebrand: PC Specialist
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Hello experts,
Can anyone educate me on how to test MBR3045CT and SR3045LCT Schottky diodes? I'm totally a newbie in electronics, so forgive me if I have cheap tools. In my effort to repair a Gigabyte PSU, I stumbled upon the two diodes, which I suspect are leaky. I tested this with my two cheap multimeters and the newly bought LCR-T4 MC328, and I got confusing results. Below are my test results.
Aneng ST182 Meter.
Diode mode.
MBR3045CT:
Diode mode
Pin 2-1 - 0.150v
Pin 2-3 - 0.150v ...
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