H89 docs/help requested

From: jpero_at_sympatico.ca <(jpero_at_sympatico.ca)>
Date: Tue Dec 11 13:07:37 2001

> From: ard_at_p850ug1.demon.co.uk (Tony Duell)
> Subject: Re: H89 docs/help requested
> To: classiccmp_at_classiccmp.org
> Date: Tue, 11 Dec 2001 19:23:01 +0000 (GMT)
> Reply-to: classiccmp_at_classiccmp.org

Snip!

> Along the sides there's a litte crack between the top and bottom parts of
> the case. You'll see a little metal plate towards the front of this
> crack. Put a screwdriver into the notch on this plate and slide it (I
> can't remember if it's towards the front or rear of the machine). This
> will unlatch the top cover which then swings open towards the back of the
> machine. Unplug the fan cable and unhook the cover entirely.

These plates is sprung loaded, push it and hold it there while
tugging the top to free the barb then carefully do the other side.
Then top will be freed, tip it back away from you if you're facing
the front end rather like BMW hood way it opens.
 
> If for any reason you want to remove the keyboard, it's held in by 6
> hex-head screws on the bottom, under the keyboard.

Hmmm, Yep.

Double check all one sided PCBs, too many of them had cracked solder
joints and component wires became unbonded from solder invisibly till
you wiggle those component. AHA!

> -tony

Worked my share on Z19's in '90 then school converted to messy
zenith DOS machines in 91. Some Z19's tend to float big cloud of
magic from it when monitor board under the tube blew. Happened to me
once while running it on looping TX/RX test hooked to IBM
mainframe spitting whole screenful of one letter, blanks one by one,
print out whole screen of next letter on Z19 before putting it
back into tested pile. Saw smoke appear and saw resistors glowing
like lava.

Cheers,

Wizard
Received on Tue Dec 11 2001 - 13:07:37 GMT