I bought some further cartridges for my collection. The complete package included a dead 2600 4-switch/vader PAL console. My thought is that this console would be nice opportunity to gain some experience in diagnose and repair (micro-) electronics.
All my cartridges are in good condition. My two light sixer and a junior as well and pimped with a composite/audio out by myself (according to instructions). Soldering skills are quite well. My knowlegde in electronics are very basic - I know nearly all components, but not the "which and when" nor "how does this works" in detail. I don't expect or want a (complete) introduction to electronics and technical details. There are books for that - but an "interactive guidiance" would be great. Learning by doing.
I'm sure that is nearly impossible to destroy a 2600 completly without a possibility to fix. So I started to diagnose the 2600. As the console arrives as "dead" I setup everything with it's original equipment to the TV at first, but nothing. Power adaptor is ok but I changed it to a stabilized one.
So I disassembled the console and checked it's condition. Fairly clean, but I cleaned the mainboard and some doubtful contacts a bit more, looks like new now.
As I can't get a picture from a dead 2600, it is difficult to tune in the correct HF channel, so I modded the console with a composite/audio out. Voila, when powering on the console now the TV turns from blue to black.
What I've noticed: When powering on the first time with a cartridge, the screen turnes black. When powering off and on again with the same cartridge, screen turnes black again. But when changing the cartridge and powering on again I can see vertical white bars and either a high frequency noise or a humming sound. Sometimes like this, sometimes like that.
I've checked and replaced C243 as the original one shows 1600uF only. The 7805 seems to be in good condition but will be replaced coming weekend. And that's the current situation.
Tools, caps/resistors etc, pinouts, schematics and Field Service Manual are at hand but I need some guidiance now to to go on further.
Thanks in advance!