|
|
-
- \documentclass[11pt]{article}
- %Gummi|065|=)
- \usepackage{graphicx}
- \usepackage{caption}
- \title{\textbf{Commodore 1902A Repair}}
- \author{Steak Electronics}
- \date{}
- \begin{document}
-
- %\maketitle
-
-
- \includegraphics[scale=0.4]{../pics/DSCN1699.JPG}
- \captionof{figure}{Commodore 1902A 14'' CRT Monitor}
-
- \section{Overview}
- The goal is to repair an old Commodore computer monitor. This particular monitor, the 1902A has two inputs. One for composite, and one for a mode which the C128 must run in, in order to produce video output for C64 compatibility mode or something. I'm not really sure. (todo). This means RGBI input must work.
-
- Currently, the monitor has errors on both RGBI input, as well as composite input. This means that the errors are likely common to both signal paths.
-
- \tableofcontents
-
- \section{Work Log}
- I picked up an old HP TV service manual (6945A) for this project. I am not knowledgable about televisions, but the more I read, the more I think I can handle this. I have also the manual for the monitor, though it is quite a bit sparse, comparably.
-
-
- Quite a bit of the Commodore 1902A TV circuitry (H sync, V sync, etc) is in a few ICs.
-
-
- The waveforms in the Commodore manual were created with a (standard?) NTSC test signal, the \textbf{10 bar gated rainbow pattern signal}. I am currently researching how to generate that myself, without forking out the cash for a video tester (Cheapest I saw the other day was \$70. I wouldn't pay more than \$20.
-
-
-
-
-
-
-
-
-
-
-
-
- \end{document}
-
|
