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About JoMa

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  1. Hi Vectrex fans, I got a Vectrex I was asked to repair and I'm currently investigating the issue it has. It seems to permanently get a left joystick input. The ship in minestorm always keeps spinning counterclockwise, even when the controller is disconnected. The action buttons on the controller work fine but moving the joystick does nothing at all. I can confirm the issue is not with the controller as I have a known-good controller to test with from my own Vectrex. I shot a short video showing the issue: https://photos.app.goo.gl/xdVaCcbBGYaxQXZ58 After looking this up, I found a video suggesting that IC302 is the issue and should be replaced. IC302 is not socketed on this unit however, so I wanted to ask the people here first for a second opinion on this being the issue before I go through the whole process of desoldering the chip. Scrolling through the comments, people seem to be mixed on whether this is the correct fix. I already tried reflowing the pins of IC302, as well as the controller port, so I can rule out that being an issue I'd love to hear some thoughts on this, any help is appreciated!
  2. Yup, received the console and the problem ended up just being the power switch. Replaced it and now I got myself a fully working unit. ^^
  3. Hello everyone. I recently bought a broken Phillips videopac G7400. It does not come with any cartridges. The seller said it simply does not switch on. I am completely new to this console, but do have some experience repairing other consoles from this era. How would I go about troubleshooting this unit without any cartridges? One question I could not find an anwser to is what happens when you turn the system on without any game inserted? Does it output any video signal? It would also be good to know some of the common issues with this console. What should be the first thing to check? Any help is appreciated.
  4. Thanks man! Found that guide already, i'm probably going to buy this kit: https://www.benl.ebay.be/itm/Atari-2600-7800-NEW-AV-Composite-Mod-Kit-Audio/152509029274?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649 It has a guide as well, so I'll see. If I get my atari fixed, I will of course post it here!
  5. No, I'm not using a switch box. The PAL consoles have a coax plug that comes out of the system that you plug directly into the tv. I will probably try a composite mod!
  6. I just replaced All the green chicklet caps and the big capacitor, and guess what? Nothing! [emoji58], i'm getting a bit tired of this console. Whats next to try? Replace the voltage regulator? Replace the small cap above the RF unit? Or perhaps do a composite mod? I dont know anymore... Edit: Could it still be the cheap power supply I use, its one of those with interchangeable plugs. Perhaps it's the issue. Also, just noticed, when i touch the connector on the board while the system is running, the distortion gets worse. So my guess is still that the RF mod is the issue at this point.
  7. I will try and get to an electronics component store and see if they have what I need. Will tell you how it went. As for the wire: Upon further inspection, it was soldered to the screw holding down the voltage regulator. I took a risk and removed it, the Atari still worked perfectly after that, so I guess someone put that wire there years ago trying to fix an issue. I'm just going to keep it removed as it doesnt make a difference anyways, or does it?
  8. Just got my replacement cable and it makes the distortion even worse somehow! So i'm keeping the original cable. So what to do next? replace the chicklet cap i guess... Any info on what voltage it is? Thanks for the help so far everyone!
  9. I just noticed something! Is this wire even supposed to be there on the underside of the board? It connects the voltage regulator with the negative side of the big cilinder capacitor. The soldering work seems very unproffessional too. Should i remove it and see what it does? Verstuurd vanaf mijn G3121 met Tapatalk
  10. The new rf Cable and some fresh solder arrives today, so if the cable doesnt help nothing, I will have to break out the soldering iron Thanks for the tip! Verstuurd vanaf mijn G3121 met Tapatalk
  11. Thanks man, I will try finding a new rf Cable and I will tell if it worked! Verstuurd vanaf mijn G3121 met Tapatalk
  12. Hello everyone, First of all: I am new to this forum and to the Atari 2600. I'm not sure if this is the right way/place to ask this, so if not, please tell me. I recently bought an Atari 2600 (darth vader) PAL console in untested condition. I got it to work mostly, the problems it had have mostly been solved except for one: There is interference in the video (RF) signal, which results in white dots moving around the screen in waves. (I have attached a video and an image of it) Here is what I already tried: -Use an NES (nintendo) RF switch instead of the built-in cable: introduced more static and the white dots remained. -Disconnected the RF cable from the Atari's motherboard and tried it with an NES: worked perfectly fine, no static at all. -Cleaned both connectors and the cable with some alcohol: Improved nothing. -Finetuned the tv channel multiple times. Important to mention is that the cable has been damaged and soldered back together by the previous owner, but since it worked fine with the NES i don't think this is the problem. My guess would be that there is something wrong with the big capacitor on the board or the RF modulator. It could also be due to the power adapter, it is one of those universal adapters on which you can set the voltage, I set it to 9V, I dont have an original one. Any help or tips would be greatly apriciated. MOV_0053.mp4
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