Hi -
I was bound to happen. I took a stab at the 2600 Composite Video Mod, using the instructions from the "How To" section on this site. *ahem* This is my first soldering project. *ahem*
Ever.
Below gets a bit garbled, I'd say techy but I'm not quite sure I know what I'm talking about...
PROBLEM: Upon completion of the mod, I can get a slowly _rolling_ video signal, but only for a split second when I flip the TV into Alt. Input Mode. Then it cuts to "Unusable Signal," no video, and stays that way indefinitely. I am quite proud that anything works, but obviously I am a little short of a working system. This is my only 2600 and I have just purchased a Cuttle Cart. Below is a little drawn out and long, but I am trying to be as meticulous as possible. Please help!
On my system, in the R41 (Chroma) location, the bands are actually colored: Gold, Red, Orange, Orange (bottom to top) on my system, but the piece itself (a transistor (?) is in the right place on the circuitboard.
The "Gold/Red/Grey/Blue" transistor from the "How To" guide is actually located adjacent to C19, on the right-hand side of TP5.
-question- is it the color, or the location of the piece that determines which one to solder the jumper to from TP5? I'm pretty sure it is the latter, but am trying to find anything to troubleshoot on...
My soldering job is not so great, so TP5 has a big blob over it.
-question- How precise need one be? There is no solder from TP5 that touches any other wires; though it does bleed over to touch the adjacent transistor (R42).
-question- Does R41 have a line on the circuit board that connects it to the transistor directly below it? I dropped too much solder there, and can't remember if it was the case before. Clearing away the excess solder, it does look like there is a pre-formed line downward, but I'm unsure...
-question- does the quality of the jumper cable play a huge role in signal quality? I literally used a piece of wire I found around the house.
-final question- What is causing the video roll, then sudden cut of video signal?! The only way I can get the signal to return is to flip from TV "AUX" mode to "regular" then back again. This only returns the signal for a split second, then it dies again.
PLEASE help! I'm going to Radio Shack as soon as I get several responses from you guys. A desolderer is already on my list...
thanks so much in advance, if I can get this to work it would make the weekend!