The Safety Episode - How to not die working on a CRT
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- Опубликовано: 1 окт 2023
- Let's get things ready for an upcoming safety episode.
For more information on repairs, diagnostics and to connect with me, please visit: / retrotechusa
#retro #retrotech #crt 
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16:38 is the start timestamp. Thanks, Steve!
Thank you!
Ty 🙏
You may have covered this and I didn’t see it, but it’d be helpful to cover the flyback transformer itself - what it is, what it does and how to be safe around that part (which is more or less covered here).
That thing terrifies me.
Excellent observation! 🐕🦺📺 There were a few things missed in terms of safety. When I was trained, remove any jewelry; no clothing that might be conductive (some shirts can hold a charge). The arm should be behind your back, and someone should be present when discharging the CRT in case of an accident. The pro version of the DIY screwdriver tool is typically longer because it keeps the tube and tech farther apart from each other. Safety gloves and glasses should be worn when discharging the tube. The tech should never be grounded to prevent the discharge from going through the body. Only the discharge tool should be connected to ground to dissipate the charge in the tube. These are the safety procedures I remember. Believe it or not, I learned this back when I took my Apple hardware certification, back when the last CRT machine, the eMac, was still serviceable. If the safety part of the exam had one incorrect answer, and to be frank, it was really all about CRT safety, you’d fail the entire exam. Oh yeah, apparently tubes can build up a charge over time. I don’t know why etc. Many ‘ modern’ sets will have a discharge bleed resistor that discharges CRTs on power down but this can fail so safety is important so that the tube cannot pose a risk when working on the device.
Damn you're looking good, Steve! Thanks for the stream.
Need to do a Blade Runner parody with all this jazz.
Steve yelling enhance at a tube as it zooms in closer and closer to the mask or through 240p adjusting the image or doing convergence. Maybe use a genesis going from rf to rgb.
thanks for this episode, I have 2 CRT TVs a 14 inch (early 1090s) and a 21 inch (early 2000s) flatscreen that I want to save they were rejected by technicians because they said they weren't worth it despite being repairable so I'm gonna take matters in my own hand, I need to know what kind of tools I need to diagnose these old electronics because I'm sure a few failing capacitors or a failing PSU is the cause. could you make a video on what tools are needed to diagnose failing parts in a CRT?
Smooth Jazz Plays...
Hey there Steve!
I had an old Sony Vega that was too heavy to move around. I thought it was a heavy case. I took the back off and the case was just plastic. These TVs were the top of the line. Had the best picture I.ve ever seen. But it was just too daggone heavy. So I drained it of any juice. released the vacuum and started busting it up. The glass was extremely thick. An inch in some places and 1/2 inch for the rest. I so hated to destroy such a beautiful TV. But I couldn't even give it away because of it's weight, Anyway, Thank you for what you do. I grew up in a TV repair shop in the 60' and 70' and was familiar with what to do. You doing this is great and I appreciate your channel
Hey steve i have a sony trinitron kv-36fv16 i need worked on and was wondering do you still live in Tennessee? If so i would be willing to drive it to you and pick it up. I live in Shelbyville myself and dont know anyone who still does this wonderful work. Nevermind you answered my question lol.
I brought the same gloves home from work. Most we ever touched there was 480.
The leather gloves just protect the rubber gloves themselves. In arcflash I think they're supposed to keep the rubber from melting to your skin.
How much voltage is in the yoke? I've always used gloves when adjusting one.
Been zapped by the yoke, only hurts when and where it happens for a second. Still hurts, but def not deadly
Wait. 44:35 class 3 or higher dielectric gloves would offer resistance against almost 30k-40k volts no? Wouldn't it help IN CASE?
Hey, this week I should be available to stream. These past weeks have been crazy.
Sounds good
👍
Lol @47:54 double bag it!
Hey Steve, I want to get a good workbench for working on CRTs. Are ESD laminate tops necessary, or would particle board top be fine? Big jump in price for the electro static discharge option. Thanks man!
Thanks for this. I found some CRTs I want to flip. And I also have two trinitrons I want to maintain and keep for myself.
Is it safe to say that if you try to operate on a CRT with one hand, you are generally being more safe? Just don't put two hands on the touchy parts? I really want to get into this, I have 4 CRTs I'd love to service but I'm terrified of shocking myself.
One hand in, one hand in the back pocket will protect you from having the voltage run across your heart, which would be bad. It won't protect you from getting shocked. I just recently took the plunge and discharged + serviced an arcade CRT and it did not live up to the hype. Way simpler and way easier than I anticipated.
Consider this; almost every long time arcade tech has either taken a hit from the anode cap, or they know someone who has. I don't think I have met a single one who knows someone who has *died* from taking a hit from the anode cap.
I just take the anode cap off with my fingers. Squeeze the rubber and pull. I haven't had a jolt...yet.
What about discharging power supply caps?
If you wanted to just touch the legs together with a resistor. Probably not needed though.
So just remove them without bridging legs somehow and bin it? @@troybranch9720
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🤔🤔🤔🤔 The idea for video is very good! I would say even excellent^2. Even me playing with electronics since many, many years I don't touch crt's. However I'm not big fan of live's as they are terribly long... It would be better to squeeze it and to prepare ex. 15-20 minutes video with the most important information...
someone mentioned a chicken stick, basically attach a PVC pipe to the screw driver to put some distance between you and the screw driver handle if you don't have gloves. is that doable? for very paranoid people... also a 40" fat monster CRT, what about them rebuilding charge? how fast does it happen? also if the giant TV is on the floor (carpet over concrete in garage) what's the advice regarding shoes? could i stand on a wooden chair? my shoes are steel toe. finally, i just want to discharge it so i can clean off the PCBs (the TV was recovered from the desert, has lots of dirt and animal hair in it). is it ok to leave the anode on after discharging it to clean the pcbs with a static free paint brush?
Please never touch screen high voltage connector and always use GROUND from SCREEN! Never from board