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"Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHorn -
Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
Because they are sheep is the correct answer.------------signature starts here------------
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
Well, it took me a while but I finally have my first scope, on order anyway. Got the Rigol 1054Z from Tequipment.net tonight. I remember looking at $30,000+ scopes 30 years ago which couldn't do 10 percent of what a $400 one can do today. The advancements in technology in one person's lifetime are nothing short of amazing. I think this is going to be a game changer for me.------------signature starts here------------
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
i have a keygen if you want to make the trial options full or make it 100mhzComment
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
iPhones are no more or less fragile or expensive than other top end phones. They are also more secure.Comment
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
Best site is RIGLOL
http://gotroot.ca/rigol/riglol/
Try to avoid installing 500uV/div option as it's uncalibrated. Doesn't do any harm but you can't really use it.
For DS1xxxZ it will fill in private key automatically, as all scopes use the same key.
These are amazing instruments, even more so considering the price, good choice!Last edited by tom66; 11-01-2015, 06:04 AM.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
the keygen i posted is the code running that site,
and DSER will skip the 500uV option.Comment
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
Thank you STJ!------------signature starts here------------
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
I definitely appreciate everybody's input on this thread. I would have had no clue what to get and probably would have ended up getting and old scope off eBay which couldn't do half what this one can, and for probably about the same price.------------signature starts here------------
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
So, I'm figuring I should get an isolation transformer so I don't accidentally blow up my scope. Any suggestions there?------------signature starts here------------
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
depends on the power requirements of what your testingComment
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
Make sure it does isolate. IIRC some tie the grounds(?) together and thus don't actually isolate completely."Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHornComment
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
It depends entirely on what you are probing.
**You always isolate the device under test (DUT), never isolate the scope.**
The reason is the scope has exposed metal components like the jacks, USB ports, etc. If you float the scope then the ground lead of your scope is also electrically connected to these parts which can present an electrocution hazard.
For the transformer, generally you want to size it on VA. Most good transformers include thermal cut off switches so if you overload them the switch trips. They can take short term overloads without issue, usually. Don't do this too often but the bottom line is I wouldn't worry too much about it.
I would use a 250VA transformer for all LCD work, and a 500VA one if I were doing plasma TVs as the full white power of an older plasma TV is likely to be around 450W. For high power devices with power-factor correction, which includes most modern LCD and plasma TVs, the PF=0.999 or better, so you can assume VA and watts are identical.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: What frequency limit I should plan for when choosing oscilloscope for TV repair?
I'm really tempted to build my own. I'm looking at a lot of them on eBay, they don't seem really expensive, but building things is so much more fun. Maybe I could make an isolated variac. What's the significance with the medical grade ones?
Maybe with something like this.
http://www.ebay.com/itm/800VA-115V-2...IAAMXQVT9TCQ-D------------signature starts here------------
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Hello everyone!
The Asrock A380 low profile card (ID 8086 56A5 - 1849 6006) have an power limit of 45W. Intel removed the possibility to increase power using the software utility, anyway the card is in an proxmox machine that doesn't run windows.
The same hardware is in another form by the name Asrock A380 Challenger that have the same VRMs and the power limit is at 60W. I searched online and found on another website an .bin bios file from the Challenger variant, that I flashed using an CH341a. Flashng worked well, I put the card in PC and booted. GPUz shows that new device ID is 8086...01-10-2025, 02:33 PM -
Hello.
I have jut got my first analogue oscilloscope. An Isotech 620 20MHz.
I want to learn how not to damage it, and I found instructions on the internet obscure.
They talk about ground, earth, floating ground, this, that....
But they don't actually say anything anything useful so far.
I want to know:
Don't connect exactly this to exactly there or it blows up.
For example, I am tracing a signal from a function generator in an audio amp, or testing for voltages in different parts of a circuit.
I want to know what not to connect... -
I have recently acquired a Dynamco D7100 analogue oscilloscope without a user manual. As this is the first time I have owned or used an oscilloscope I would like to try and find an instruction book. The manufacturers no longer hold any information and a Google search only found one site but when I downloaded a 'service manual' all I got was gobbledegook. Any help would be gratefully appreciated or even pointers to a generic manual where I could learn more. -
All,
Some of you have helped me in the past and I am very appreciative of all the help! (I have fixed TVs/Stereos/ and other small appliances with your efforts...Thanks so much!!!
Today I went to a local HAM Radio Festival. It was one of the smaller ones in our area. My stepfather is the HAM operator. I tinker in electronics but am a Software Programmer (27 years now).
I was looking for a few odds and ends for some electronics work I have to do for the household/farm. Typically these type of shows have the grab bags or a electronics vendor... -
Hi, i have a Lenovo S145 that after 20 seconds shutdown and restart (it's working correctly on thse 20 seconds)
everything seems ok, but on Vcore inductor ( this is an i3 with just 1 switching power supply for CPU)
there is an output to teh CPU with a spike.. seems that inductor can't handle the input...
replaced the capacitor (330) and the inductor (R15) without any change
any idea? very thank you!
input of the inductor seems as usual... only strange thing is that the upper/lower voltages seems to be 21V (main power line is 19.3) ... but not sure this...
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