Ohhk

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Commodore_1902A_Monitor/docs/2.tex

@@ -30,7 +30,7 @@ Quite a bit of the Commodore 1902A TV circuitry (H sync, V sync, etc) is in a fe
 
 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.
 
-
+From a brief search, most people have only setup rough test signals with uCs that do either NTSC or PAL, but not necessarily the full 10 bar gated test signal, instead only a passable working signal, to verify video output.
 
 
 

Commodore_1902A_Monitor/docs/2.tex~

@@ -0,0 +1,45 @@
+
+\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}
+

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Commodore_1902A_Monitor/docs/3.tex

@@ -0,0 +1,73 @@
+
+\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 three inputs. One for composite, one for S-Video (essentially connected to same circuitry as composite) and one for RGBI mode.
+
+Currently, the monitor has errors on composite input / S-video. There are no errors on the RGBI input.
+
+\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.
+
+\vspace{0.2in}
+
+
+Quite a bit of the Commodore 1902A TV circuitry (H sync, V sync, etc) is in a few ICs, according to the schematic.
+
+\vspace{0.2in}
+
+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. 
+
+\vspace{0.2in}
+
+From a brief search, most people have only setup rough test signals with uCs that do either NTSC or PAL, but not necessarily the full 10 bar gated test signal. Instead only a passable working signal, to verify video output, seems to be par for the course. I might be out of luck!
+
+\vspace{0.2in}
+
+
+I reviewed this page:
+
+http://www.repairfaq.org/sam/monfaq.htm\#monsugref
+
+Which many will recognize as the gargantuan repair faq website.\footnote{I find text heavy websites like this, quite incomprehensible, to be honest. How much better the site would be, if it was a book. I know I'm not the only one that thinks this way (e.g. Bill Waterson said he prefers actual paper of his comics to a computer screen), but yet websites continually seem to post article after article, after blogpost, after blogpost, of which I will not take the time to click through. Websites are infinitely inferior to books, for any significant amount of text. This is why twitter (and not booker) is so successful. Am I wrong in thinking this, or are the search engines skewing how much people actually read these ``blog'' websites?} I'm going to purchase a book they mention:\\
+\textbf{Computer Monitor Troubleshooting and Repair} - Joe Desposito and Kevin Garabedian
+
+which cost me a whole \$6.00 from a used book store online. While the HP book was helpful, it is for a B\&W CRT lacking any colour related circuitry, and I need something with more practical repair advice. The HP tech book, is also dry, which means it assumes you understand a lot of the mechanics already.
+
+\section{References}
+
+\textbf{Books}
+\begin{itemize}
+\item Art of Electronics 3rd Edition (Horowitz, Hill): Appendix I - Television.
+  \item Computer Monitor Troubleshooting and Repair - Joe Desposito and Kevin Garabedian
+  \end{itemize}
+
+\textbf{Video}\footnote{Disclaimer: Youtube is bad}
+\begin{itemize}
+\item Retro Game Mechanics Explained:  https://www.youtube.com/channel/UCwRqWnW5ZkVaP\_lZF7caZ-g
+  \\(the SNES section has some well produced CRT video explanations).
+\end{itemize}
+
+
+
+
+
+
+
+\end{document}
+

Commodore_1902A_Monitor/docs/3.tex~

@@ -0,0 +1,45 @@
+
+\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.
+
+From a brief search, most people have only setup rough test signals with uCs that do either NTSC or PAL, but not necessarily the full 10 bar gated test signal, instead only a passable working signal, to verify video output.
+
+
+
+
+
+
+
+
+
+
+\end{document}
+

Commodore_1902A_Monitor/docs/3.toc

@@ -0,0 +1,3 @@
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+\contentsline {section}{\numberline {2}Work Log}{2}
+\contentsline {section}{\numberline {3}References}{3}

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Commodore_1902A_Monitor/docs/4.tex

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+
+\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 three inputs. One for composite, one for S-Video (essentially connected to same circuitry as composite) and one for RGBI mode.
+
+Currently, the monitor has errors on composite input / S-video. There are no errors on the RGBI input.
+
+\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.
+
+\vspace{0.2in}
+
+
+Quite a bit of the Commodore 1902A TV circuitry (H sync, V sync, etc) is in a few ICs, according to the schematic.
+
+\vspace{0.2in}
+
+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. 
+
+\vspace{0.2in}
+
+From a brief search, most people have only setup rough test signals with uCs that do either NTSC or PAL, but not necessarily the full 10 bar gated test signal. Instead only a passable working signal, to verify video output, seems to be par for the course. I might be out of luck!
+
+\vspace{0.2in}
+
+
+I reviewed this page:
+
+http://www.repairfaq.org/sam/monfaq.htm\#monsugref
+
+Which many will recognize as the gargantuan repair faq website.\footnote{I find text heavy websites like this, quite incomprehensible, to be honest. How much better the site would be, if it was a book. I know I'm not the only one that thinks this way (e.g. Bill Waterson said he prefers actual paper of his comics to a computer screen), but yet websites continually seem to post article after article, after blogpost, after blogpost, of which I will not take the time to click through. Websites are infinitely inferior to books, for any significant amount of text. This is why twitter (and not booker) is so successful. Am I wrong in thinking this, or are the search engines skewing how much people actually read these ``blog'' websites?} I'm going to purchase a book they mention:\\
+\textbf{Computer Monitor Troubleshooting and Repair} - Joe Desposito and Kevin Garabedian
+
+which cost me a whole \$6.00 from a used book store online. While the HP book was helpful, it is for a B\&W CRT lacking any colour related circuitry, and I need something with more practical repair advice. The HP tech book, is also dry, which means it assumes you understand a lot of the mechanics already.
+
+\section{References}
+
+\textbf{Books}
+\begin{itemize}
+\item Art of Electronics 3rd Edition (Horowitz, Hill): Appendix I - Television.
+  \item Computer Monitor Troubleshooting and Repair - Joe Desposito and Kevin Garabedian
+  \end{itemize}
+
+\textbf{Video}\footnote{Disclaimer: Youtube is bad}
+\begin{itemize}
+\item Retro Game Mechanics Explained:  https://www.youtube.com/channel/UCwRqWnW5ZkVaP\_lZF7caZ-g
+  \\(the SNES section has some well produced CRT video explanations).
+\end{itemize}
+
+
+
+
+
+
+
+\end{document}
+

Commodore_1902A_Monitor/docs/4.toc

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+\contentsline {section}{\numberline {1}Overview}{1}
+\contentsline {section}{\numberline {2}Work Log}{2}
+\contentsline {section}{\numberline {3}References}{3}