OK, so I got myself an oscilloscope for testing PSU Ripple, but i'm having a problem. The ripple looks exactly the same no matter what PSU it gets used on, regardless of whether it's a perfectly good PSU or an Antec StupidPower with busted caps. It stays aroung 10mv. I'm totally new to this, so I'm sure it's something I'm doing wrong. Any Ideas?
-
I love putting bad caps and flat batteries in fire and watching them explode!!
No wonder it doesn't work! You installed the jumper wires backwards
Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium
Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 Pro -
Re: Hantek DSO-2090 USB Oscilloscope problem
Are you sure you are using the x10 probe? Edit: Scratch that, the maximum sensitivity is only 10mV/div, with a x10 probe that would be 100mV/div... not barely enough to see ripple on a decent PSU. You're going to need to make your own compensated x1 probe. I had a few links, will look thru them and post them later.Last edited by Th3_uN1Qu3; 03-02-2011, 02:03 AM.A working TV? How boring!Originally posted by PeteS in CA -
Re: Hantek DSO-2090 USB Oscilloscope problem
Thanks!I love putting bad caps and flat batteries in fire and watching them explode!!
No wonder it doesn't work! You installed the jumper wires backwards
Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium
Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 ProComment
-
Re: Hantek DSO-2090 USB Oscilloscope problem
In case it helps, I've attached some images of the outputs. The first one is with the main probe connected to the +5v of a PSU with the small grounding wire clipped to the case. The second is with the main probe at the +5v with the ground not connected. The third is with the probe attached, but not connected to anything, and the fourth is with no probes attached at all. The first two look exactly the same no matter what PSU I connect it to and what output on the PSU I connect it to.Attached FilesI love putting bad caps and flat batteries in fire and watching them explode!!
No wonder it doesn't work! You installed the jumper wires backwards
Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium
Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 ProComment
-
-
Re: Hantek DSO-2090 USB Oscilloscope problem
The grounding wire clipped to what case? I hope that was the case of the PSU. Anyway, try hooking it to a black wire of the PSU directly.
But first let's see if it's not broken. Using Sound Forge or Audacity generate a 1kHz tone. Unplug your speakers and plug into your soundcard a cable which you can attach your scope to. Hit play. See what you get.A working TV? How boring!Originally posted by PeteS in CAComment
-
Re: Hantek DSO-2090 USB Oscilloscope problem
The ground wire was connected to the PSU's case for the images I posted before, but it was the same with it connected to a black ground wire. I found a spare audio jack cable and connected that to my sound card and generated a 1KHz tone with Audacity. I connected the black grounding wire from the probe to the ground wire in the cable and the main probe to one of the wires. I tried it at differrent Time/DIV settings. The first picture is at 40uS, the second at 200uS and the third at 400uS.Attached FilesI love putting bad caps and flat batteries in fire and watching them explode!!
No wonder it doesn't work! You installed the jumper wires backwards
Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium
Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 ProComment
-
-
Re: Hantek DSO-2090 USB Oscilloscope problem
Was the volume maxed? A soundcard puts out a fair bit more than 70ish Vpp, more like 1.something volts. If you are using a x10 probe this result is to be expected. Try the x1 probe.A working TV? How boring!Originally posted by PeteS in CAComment
-
Re: Hantek DSO-2090 USB Oscilloscope problem
OK. Here it is with the 1x Probe. The First Picture is with no sound, Second with 1KHz at 40uS Time/Div, 3rd is at 200uS, 4th is 400uSAttached FilesI love putting bad caps and flat batteries in fire and watching them explode!!
No wonder it doesn't work! You installed the jumper wires backwards
Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium
Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 ProComment
-
-
Re: Hantek DSO-2090 USB Oscilloscope problem
It looks like the whole problem might have been the 10x probe. I connected it to an Antec which I knew had bad caps on the 5vsb with the 1x. Here's how it looked when connected to a cheap PSU tester. First Pic is the +5 output, second is the +12 and the third is the 5sb rail with 3.4V of ripple. Any ideas as to why the big spikes on the +5v and +12v rails? Maybe it needs the two caps in parallel with it?Attached FilesI love putting bad caps and flat batteries in fire and watching them explode!!
No wonder it doesn't work! You installed the jumper wires backwards
Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium
Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 ProComment
-
-
Re: Hantek DSO-2090 USB Oscilloscope problem
Yes, intel testing procedure is 2 caps in parallel one lytic one ceramic but i don't know from memory. Google it.
A working TV? How boring!Originally posted by PeteS in CAComment
-
Re: Hantek DSO-2090 USB Oscilloscope problem
Pretty sure it's a 10uF electrolytic and a 100nF/0.1uF ceramic.I love putting bad caps and flat batteries in fire and watching them explode!!
No wonder it doesn't work! You installed the jumper wires backwards
Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium
Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 ProComment
-
Re: Hantek DSO-2090 USB Oscilloscope problem
Don't do that. In a switching power supply the placement of the ground is as important as the placement as the probe. Place the ground and probe across the cap being tested and know that the waveform only applies at that point. As you move along the trace or plane the wave will change.Comment
-
Comment
-
Re: Hantek DSO-2090 USB Oscilloscope problem
OK. I got the two small caps and it seems to work great. I've made a few adjustments to the load tester too. I soldered a few extra wires to the ATX Connector (1 for each rail + 1 ground) which go into a 6-way switch, allowing me to select which rail to monitor. I tested a Bestec ATX-300-12Z. Here's how it looks when overloaded to 405W. The ripple was in spec, but the primary switcher exploded after about 5 minutes. Pictures, from left to right are 12, 5, 3.3, -12, 5sb. Thanks Th3_un1qu3Attached FilesI love putting bad caps and flat batteries in fire and watching them explode!!
No wonder it doesn't work! You installed the jumper wires backwards
Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium
Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 ProComment
-
-
Re: Hantek DSO-2090 USB Oscilloscope problem
Good job.
@ severach i'll say it again - you should always test at the end the load is hooked at. Otherwise the numbers are meaningless.A working TV? How boring!Originally posted by PeteS in CAComment
-
Howdy all!
I'm a newb concerning electronics repair and I'm looking at a Hantek DSO2D15 oscilloscope. It's on sale for a good price IMO. I'm asking any feedback concerning this device and a few power supplies if anyone is willing the help an old tech.
The Hantek seems like a decent machine for $175 new. I'm also looking at a 60v 24a power supply for $60. Sound like a good deal? -
I have an LG Plasma TV 60PM6700 for the past ~12 years.
In the last ~3-4 months I have been having some issues.- Problem: It started with random picture disappearing (sound still worked).
Frequency: Happened about once a week.
Solution: Had to turn off TV wait a few seconds before turning it on again. - Problem: Then it got worse and the TV started to shut down and when turning on the no picture just sound.
Frequency: Happened about once a week.
Solution: Had to turn off TV wait about 10-20 seconds and turn it on again to solve. - Problem: TV shuts down
- Problem: It started with random picture disappearing (sound still worked).
-
i have a problem with thinkpad X1 carbon gen 2 "LMQ-1MB 12298-2 48.4LY26.021"
The laptop was turned off because the MOSFET was not transmitting voltage. After checking it turned out that the gate pin on the MOSFET was the problem, because it was producing an inappropriate voltage. and it was discovered that the problem was with the Think engine, so I decided to reprint each pin, and finally the mosfet could work properly. However, there is another problem, even though the voltage has been supplied to the laptop, it still won't turn on, there isn't even an LED indicator. After double... -
PC Specs:- CPU: Ryzen 5 1600
- GPU: GTX 1080 Palit JetStream
- MOBO: ASRock ab350 PRO4
- RAM: Crucial Ballistix Sport 2x8GB 3000MHz (XMP 2.0)
- PSU: XFX 650W (don't remember what model)
- OS SSD: ADATA SP920
- OS: Windows 10 21H2
Problem description:
Hi. I have a problem that has been going on for some time (2-3 years). It's hard to explain what it really is. Sometimes, my computer stops playing music, stops videos (starts buffering on youtube), there is no sound in games and when I minimize the game window and return to the game there is a black screen with window borders... -
Good morning,
I have a problem with Lenovo T580, which after error code 0288 suggests a problem with the display. I checked the display and it works on another laptop. I replaced the display cable with a new one. I programmed another BIOS (downloaded from this forum) and I still have the problem of a dead display - there is an image via HDMI, and the system does not detect the built-in LCD at all. The problem appears to be hardware. What can I check to confirm or disprove this? I found many threads on the Internet related to this problem 0288, but without specific solutions. Please advise....
Comment