How to discharge a Sony PVM BVM CRT or arcade monitor (after you unplug it!)

[@NirnBootMod]

I think this will always scare the shit out of me... and I would still be wondering if its discharged after I do it.

[@kazaakas]

Wow, very impressed about this channel! Great guide! This is what many-a retro gamer needed for so long. Very excited the video's to come from this channel. Hope to learn some stuff about improving my BVM picture (calibration, recapping etc). Have a great day!

[@jh-xk2ch]

Remove ring In my electronic principles training in USAF they taught use on the first day to remove jewlery. If it ever touches live voltage it can heat up like a toaster and burn you.

[@N0bbyN0bbs]

glad i find u channel dude! keep on filmin. greetings from germany

[@RetroTechUSA]

Professor Oak Awesome! I'm located in Tennessee in the US. Glad to have you. Thank you for watching

[@unknown50ct]

Where does the current go once it touches the ground point? Does it go through the furniture into the floor or does it just die on the ground plate?

[@GavinHaubeltMedia]

If the CRT is unplugged how does hooking to the ground on the CRT doing anything since it is not connected to ground via the plug?

[@lelanddyke8386]

Little late, but in case it helps anyone else. It's easy to think of voltage as a volume of water that can get drained away to a sewer (ground), but that's not really what it is. In this case, voltage is a very high pressure between two points within the system. Like two tanks of water connected by a valve, one highly pressurized and the other a vacuum. What you want to do is balance the pressure by "opening" that valve, or in our case creating a short between the two different areas of electrical potential/voltage. This makes the voltage, or "pressure differential" between the two zones even out. Water will no longer be capable of travelling from one tank to the other no matter how many times that valve is opened and closed again because the pressure has equalized, just as electricity will no longer travel between the two zones because the potential is gone. What we're doing here is making sure that the "valve" we're opening does not travel through our bodies the first time we do it.

[@unknown50ct]

@@lelanddyke8386 Thank you very much, I just posted a similar question

[@Scribblescrabbly]

Thank you! Any links as to where I can purchase the gloves?

[@JNJG1999]

Hey @Retro Tech I'm a vintage tv lover here in the uk. It's a dying art unforunately. Do you have any resources or advice you could give so I could learn how? this video has already helped me learn the 1st step! I have a 1978 b&w set with the schemenatics.

[@eric90000]

Perfect, exactly the video I was looking for! Any chance of a troubleshooting video where you talk about what can happen to a CRT during transportation or just normal knocks and bumps over time and How to diagnose/fix said problems? E.g. yoke getting knocked out of place, convergence out of whack, focus not right. You'd probably have to manually cause a combination of problems with a CRT to show this but it's just a suggestion! Keep em comin.

[@eric90000]

I have seen all your videos so far by the way and realise you've done several separate videos, but I mean more of a troubleshooting video in a scenario where you've maybe just brought home a CRT and notice issues, and how to fix said issues.

[@RetroTechUSA]

Thank you. I will do some videos kind of like that in a month or so after I get through with the Neo Geo arcade cabinet. I have a 14" pvm and a 20" that need to be taken completely apart and then restored. I'll be recording as much as possible of both monitor restorations. Before that I've got another couple videos reviewing cleaning PVMs coming up later this week. Please follow the channel for upcoming content.

[@eric90000]

Retro Tech Brilliant, I look forward to the new videos. Best of luck with the arcade cab restoration!

[@RetroTechUSA]

Thanks. The arcade restoration is going great. I'll have an update on it later this week too.

[@n646n]

CRTs are super durable. You'd have to drop a crt monitor down the stairs to do any damage to it. TVs are worse since they're heavier, but still can withstand a lot.

[@oatsthedog]

Hey. I just got a new crt tv and there is a white line across the screen. I don't know how to repair it.

[@bodine1231]

I've been told by a few arcade technicians that gloves do nothing to protect you from shock of the anode.

[@RetroTechUSA]

They probably don't. It's best to discharge with a screw driver that won't conduct electricity through the handle. The gloves are better to keep your wrists, hands & arms from knocking against something.

[@international806yachting]

I don‘t dare to do that. Can‘t I instead just not use the PVM for let‘s say 48h and then open the case? Shouldn‘t any charge have disappeard by then?

[@diegoantoniorosariopalomin4977]

Thanks for the video. Wish me luck on my ViewSonic 1100 df🤞

[@korsoupp6450]

so If I wanted to adjust my yolk on my Trinitron. Would I have to take the cap off first before adjusting or would I be able to adjust it fine if it is discharged with the cap on?

[@retrocitytechresearch3448]

Love the video. Looking forward to the next one.

[@StRoRo]

What is the clear plastic cog on the white panel on the yoke? My PVM has it. Is it a way of adjusting the joke?

[@billwilliams6338]

RETRO TECH, why can't I measure the CRT anodes voltage using an oscilloscope? why is the anodes voltage use a floating isolated ground any reasons why?

[@elamriti]

question i have a commodore monitor full of nicotine any tips on how to clean the inside ! its yellow and nasty even the fly back etc

[@RetroTechUSA]

I've done a few videos specifically on cleaning inside PVM CRTs. Honestly the procedure is the same for nearly all CRTs. I use a soft long brissel brush to knock off the loose dust and dirt. Then I use my air compressor to blow it out. If you want, you can disassemble your CRT and give it all a good cleaning with alcohol.

[@cradledani]

I'm wondering if replacing caps on a sony pvm will fix a wavey screen? No amount of geometry fixes it. The picture is stable, the colours are great, the lines are clean... it's just got the warped inner area. Magnets on the inside only effect so much of the edges, so it doesn't reach where the issue is. Driving me bonkers!

[@RetroTechUSA]

That may be a cap issue. What model is it?

[@cradledani]

Retro Tech it's a Sony pvm-2053md.

[@RetroTechUSA]

Atomizer Zero Im going to do a full tear down and rebuild of 2 PVMs before the winter gets to my area this year. One of those is a 1953md. Unfortunately I need to get the Neo Geo Arcade Cabinet finished 1st, but videos will be produced.

[@cradledani]

I'm looking forward to seeing the teardowns, and the neogeo cabinet! Thanks for doing these videos. They've been desperately needed on youtube IMO. I love my PVM... I just wish it didnt look so ugly right now D: I at least got the focus fixed (worked it out like, 2 days before you posted the video on how to adjust the focus lol), but yeh, i feel a recap is needed on this. Also just found out that the composite input as pretty much died. it was working, and then just started fading to darkness. now theres a small amount of red getting through and thats it. Most likely another cap issue ¬_¬

[@AndrewHaddow]

You make it look so easy, but I'm still terrified to open up my PVM.

[@RetroTechUSA]

What model is your PVM?

[@elamriti]

even after you discharge it there can stil be a charge so do this a couple of times

[@jamesdecade]

Great video! My 20L2 needs the yoke turning a little bit. I noticed on the yoke adjustment video that you did it while the TV was running. Having to discharge every time I make an adjustment would mean a lot of hassle until it's right. What would you recommend I do? Thanks.

[@RetroTechUSA]

I have a lot of experience, so I ussually do that adjustment while the CRT is running. I have 2 videos on yoke adjustments if you'd like to check them out.

[@Cybrisk]

Hey man, I have sort of an unrelated question I can't find any answers on (because it's probably a dumb one). On my Trinitron KV27S42 consumer set, there are big plastic tabs in the upperhand corners of the case where screws should be. I've never taken one of these apart and wanna be super careful, how do you go about removing those if it all? Do they even do anything? They look like they're intended to be a permanent part of the case itself but I just wanted to be sure before I break anything.

[@RetroTechUSA]

Cybrisk Man you are in luck. I just picked up a Sony k27 today from a thrift shop. Once I get back to my garage, I'll be opening the TV to service, etc. I'll be making lots of videos on it too. Look for a pickups video on it really soon. Video will be ready Probably in the next few days

[@Cybrisk]

That's awesome, thanks!

[@xmenken1]

Why did you not touch the end of CRT? I mean circular CRT socket. Maybe it is easiler than plugging a screwdriver into your CRT.

[@mkolt]

Shouldn't you rather use your right hand, so that if you get zapped the current will flow through you body away from the heart?

[@staticzero01]

It would be best to use your right hand. Just in case you do get zapped, there will be less chance of current hitting your heart.

[@n646n]

This seems negligible.

[@staticzero01]

@Just A Retro Gamer it would be a bad way to find out if you have a heart problem.

[@staticzero01]

@Just A Retro Gamer what kind of fool are you to think that's negligible anyway?

[@n646n]

@@staticzero01 A left handed electrician?

[@staticzero01]

@Just A Retro Gamer even a left handed electrician should know.

[@Survivor-ng4te]

Nice video. Have you ever been zapped?

[@PyoMaung]

❤❤❤❤❤

[@harryfogarty8190]

There is better ways of doing this