CBM 8032 display CRT replacement

[Ethan Dicks]

On Mon, Aug 17, 2009 at 10:53 AM, Alexandre
Souza<alexandre-listas at e-secure.com.br> wrote:
>> As far as my PET, the only sign of life I can see is the illumination of
>> an
>> LED on the board. In the interests of troubleshooting, I have removed the
>> z80 board and put the 6502 back in its socket. Does anyone have a PDF of
>> some type of service manual? It could be helpful.
>
>   I'm pretty sure google is your friend :) And with the service manual,
> maybe you can get the composite video line that goes to the monitor and show
> it up on a tv or external composite monitor :o)

There are a couple of simple (1-chip) circuits to do that and I've
built one of them.  I could get legible text on a "standard" B&W
security monitor, but I never did get the horizontal hold to be
stable.

It was good enough to prove the machine was running (I did see the
usual ROM splash message in the corner), but it wasn't possible to use
the machine in that state.

Perhaps you might have better luck, but that was my experience with an
external composite monitor adapter circuit a year ago.

-ethan