For your safety, send the monitor out for service, to do any work in it.
After changing the flyback, there are a number of safety and operation tests
to do. You will not have access to the necessary equipment at home for this.
It takes more than a simple DVM to work on these.

There are issues for testing and adjusting the HV at the anode, testing the
hold down current and HV safety cut-off, testing the performance of the main
power supply, and etc. There is then the set-up of the CRT screen voltage,
and the beam focus set-up.

If the HV is too high, there is risk of X-Ray radiation exposure. Some
people tend to smirk at this one, but if you venture in to the safety issues
concerning CRT monitors, this is a very serious thing.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"Mike Deblis" wrote in message
...
Hi,

I know a bit about low voltage stuff, but I want to change the LOPT in an
Eizo/Nanao monitor.

I know the LOPT is faulty, as it arcs and pops when the monitor is running,
and after much effort, I've found a spare.

The monitor (an excellent F77) is probably not worth sending to a
professional to replace the LOPT as the s/h value is probably only USD
100-200...

What do I need to know about safety in order to change the LOPT? It's
certainly worth trying to repair as the picture quality is excellent, but
not worth dying for !

How do I ensure that there is no HV left in the chassis/tube before starting
work - the monitor has not been powered up for some time (month or so) at
the moment.

What special tools (if any) will I need?

I really don't like really HV stuff much (very healthy respect) and would
appreciate the advice...

Thanks from a slightly paranoid Mike...