Discharging question

[ChadTower]

Okay, this one is a head scratcher.

I'm watching Randy Fromm's monitor repair videos.  He goes out of his way to make a point, and gives a demonstration, of the fact that he does not discharge a monitor when working on the chassis.  He goes on to say the diodes in the HV transformer make it impossible for the charge to come out of the tube while the anode is attached properly and you're not messing with it.

Now, what he says does make sense.  Is it safe to work on a chassis without discharging the tube IF YOU'RE NOT MESSING AROUND THE HV ANODE?  Theoretically it should be... but people here have always been very adamant about the fact that one should discharge no matter what.

Is that because folks here tend to remove the chassis entirely and he works in the field where speed is best and not tearing the chassis out is key?  To remove the entire chassis, one must remove the HV anode, so one must discharge before touching it...  that's my best guess, anyway.

[MonitorGuru]

Yes.

In a nutshell (since I've been known to chastise the "I always discharge my monitor if I plan to drop a coin in" posters): Have a reason to remove the anode wire: Discharge.  Otherwise Don't.

Implying: Cap kit or other component replacement that would require you to pull the chassis from the frame in order to work on it easily, implies you need to remove the anode wire, meaning discharge.

Corollary: Swaping yoke wires, the yoke itself, replacing a fuse, removing a monitor to clean, etc.. DONT Discharge.


Search "Discharge" on this fourm for tons of posts on the subject.

[ChadTower]

Search "Discharge" on this fourm for tons of posts on the subject.

Dude, the last time I searched a forum on "Discharge" I got some results I never, ever want to see again.

[shmokes]

Search "Discharge" on this fourm for tons of posts on the subject.

Dude, the last time I searched a forum on "Discharge" I got some results I never, ever want to see again.

LMAO

Okay...so does this mean that if I'm decasing my TV to mount just like an arcade monitor that i can touch anything I want without risk of bodily harm?  As long as I'm not pulling any wires are anything?

[MonitorGuru]

"Anything" is a stretch... But in essence, you can touch any normally accessible surface area without a problem. Use common sense and you're safe.  The charge is stored in the tube and in capacitors.

The things you shouldn't do: Lift/touch around/under the anode cap, or touch the bare solder points on the underside of the chassis board (you wont get zapped by the tube,  but instead potentially the large filter capacitor, especially if the fuse is blown)

[shmokes]

Cool....that makes me feel better.  I'll still probably try to just touch as few parts as possible, out of paranoia, but it's nice to know that most likely I'm not going to die.

[ginno]

I decased my TV,

Had all those concerns about discharging TV.....

[paigeoliver]

You only discharge if you have to pull the ANODE cap off, no other reason. Oh, I also discharge bare tubes that have been sitting before I hook them back up, as apparently some of them can somehow magically build a charge back up while they are sitting.