Re: Connecting Apple II+ to TV

[bn281@torfree.net (Don Melton)]

Philip Taft (ptaft@wang.com) wrote:
<snip>

: I tried to take the video out from the Apple and put it into LINE 1 input
: on the TV. Seemed to work okay, but I was getting "color bursts" (for lack
: of another term), and I tuned the potentiometer a bit and it seemed better.
: Now I'm getting periodic flashes, but it returns to normal soon enough.

: Am I overloading the LINE (voltage)? I had first tried the adapter for TV
: but had worse luck. Any help, before I cook the Apple or my TV?

Philip,

You're doing the right thing AFAIK.  You shouldn't be able to "cook" the 
TV ... the Apple's output is regulated (even with the pot' turned all the 
way up) and there *should* be protection circuits in the television.

Is the colour burst problem during TEXT, HI-Res, or LO-Res Graphics?  If 
it's TEXT you need to know if you have a an early (Rev 0) motherboard -- 
they didn't turn off the colour burst signal on B&W text display -- or a 
later board which *should* disable the colour burst signal.

If you're getting colour 'flashes' during graphics displays there's a 
possibility that something is "broke".  I'd try some electronic grade 
cleaner on the potentiometer *and* on the variable capacitor near by.  A 
little dirt in them could be causing intermittent "flashes".

There's a good book (if you can find a copy) for maintaining/repairing 
Apple ][ and Apple //e series computers.

_Apple II Plus/IIe Troubleshooting & Repair Guide_ by Robert C. Brenner
published by Howard W. Sams & Co.  ISBN 0-672-22353-8.

Have fun!

be seeing you ... Don
  
-- 
be seeing you ... Don                Don Melton <bn281@freenet.toronto.on.ca>