Bah Hahahaha

[outlawmws]

In thinking about your questions and how they are phrased, I’m concerned that you are going into a HIGH VOLTAGE TV with this apparent level of understanding.

You do realize that even if unplugged dangerous levels of voltage are stored in some devices? High enough to kill you.

Safety:
Discharge all the large capacitors prior to poking around in there. Be sure to ground the chassis in some way. Use a ground strap on the wrist that you are using to work in there and only use the one hand. (Electrical path from one had to the other goes thru your heart, potentially stopping it)

Talk to other experienced TV guys about safety; my comments are in no way complete.

Schematic reading:

The lines represent continuity; the dots at line junctions represent a connection. Two crossed lines with a dot is a connection, without the dot is no connection. Look at the dots carefully, as a misprint could place a dot where none exist. Better schematics never allow a 4 way connection to eliminate this potential issue, but I can see this older schematic did not follow that practice, so you need to be careful.

[Tubejunke]

Originally Posted by outlawmws

Use a ground strap on the wrist that you are using to work in there and only use the one hand. (Electrical path from one had to the other goes thru your heart, potentially stopping it)

Talk to other experienced TV guys about safety; my comments are in no way complete.

The one hand thing has been a rule of thumb for ages but I tend to differ on the use of a ground strap to the wrist. Mainly because I can see no practical use for it in vintage television repair. Now when I started feeling technologically antiquated and took computer courses in college the hardware studies instructed us to use the grounding straps. This is not for personal protection by any means. It is to eliminate the possibility of static electricity zapping a computer component. Modern day components like integrated circuits, microprocessors, ect.. are sensitive to static electricity.

The technique may be applicable to servicing modern television receivers if they were worth servicing.

Personally I would rather NOT be connected to the chassis of any television receiver. Some chassis are HOT!

[Chad Hauris]

I agree, a ground strap to the wrist should not be used in any type of electronics repair except for unpowered static sensitive IC circuits. Even 28 volts can give you a jolt if one part of the hand or wrist is grounded and the fingers touch the voltage (had this happen in a jukebox where the wrist touched the chassis and finger touched a 28 volt relay contact)

[Pete Deksnis]

[1] Take the lead from a wrist strap and plug it in one terminal of your ohmmeter.

[2] Put on the wrist strap.

[3] Hold the other lead from your ohmmeter in your fingers.

[4] Read the ohmmeter.

then/or

[1] Take the lead from a wrist strap and plug it in one terminal of your ohmmeter.

[2] Probe the wrist strap with the other lead from you ohmmeter.

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Now I haven't done that in years, but IIRC there is a megohm or more built into that strap.

Personally, I've used a wrist strap almost daily for years w/o a problem with shock.

BUT, I would never use one around a tube TV. There's no reason to, and with kV-levels, it would of course be stupid.

Use wrist straps where they may do some good, around microcircuits.