Re: Apple //c monitor - tilted?!

[mjmahon@aol.com (Michael J. Mahon)]

Liam Busey asked:

>"Michael J. Mahon" <mjmahon@aol.com> wrote in message
>20040804060334.14909.00000812@mb-m10.aol.com">news:20040804060334.14909.00000812@mb-m10.aol.com...

<snip>

>> In fact, it is quite unlikely to get into trouble working on a CRT monitor
>> if you follow standard, simple precautions.

<snip>

>Michael, I've heard that you should always use an isolation transformer when
>working on a live TV. Is that over cautious for a relatively minor
>adjustment?

That is a good precaution only if the monitor/set is of the "hot chassis"
variety, which has not been made in the U.S. since the 1970's.

Virtually all monitors/TV sets made recently use transformers, either
straight off the AC line or in a switching power supply.

You can easily verify that an older chassis is "cold" by gently "caressing"
it with the back of your fingers--if you feel a "buzzing", the chassis
is hot.  Reversing the AC plug will then make the chassis "cold".

-michael

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