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  1. BackInTime82

    Congo Bongo died, pcb brings 5v down

    The TIP-141 was probably fine when the power supply was new but in truth it is a combination of both the "on time" when heat is being generated and the thermal cycling when the substrate inside heats and cools repeatedly that both contribute to an ultimate failure. The latter is probably more...
  2. BackInTime82

    Congo Bongo died, pcb brings 5v down

    If any Sega game uses what I call the "G80-style" power supply, which is the one shown three replies above, you can easily rebuild it following these steps. While not perfect (it is hard to remove the PCB for servicing) it is one of the better linear supplies from this era with one small, but...
  3. BackInTime82

    These games have survived over 40 yrs. Will they make 40 more?

    It is difficult to make predictions that far into the future (so I won't). But I will provide some perspective specifically around CRTs. Look around YouTube. There are several people who enjoy resurrecting and restoring old television sets from the 1950s onward. While not as large as the video...
  4. BackInTime82

    Astro Blaster Sega G80 Cage cover board configuration sheet: File available? or can someone who has the game please scan this?

    I'll have to see what I have in my workshop. Sadly, many of the cages I have are missing the lid as well. If I find one, I can scan on high resolution. But you still might need to do touchups. I know nothing I have looks as clean and white as this one!
  5. BackInTime82

    Star Trek G08 Monitor Blooming

    Bad solder could have been the problem, but keep an eye on it for a little while. I'm starting to accumulate a small box of HV units that hiss and sputter without remedy, sometimes accompanied by an ozone odor. I've yet to see a G08 transformer crack open and explode like a G07 but some do...
  6. BackInTime82

    SEGA Star Trek - Power on Reset Trouble

    Sorry for the late reply. I've been terribly busy lately moving my workshop from one location to another. I have some insight here that might help. The symptoms you're describing fall under POR but there is a specific part of that circuit that was modified because of (you guessed it) issues with...
  7. BackInTime82

    Star Trek SOS help (resolved)

    Ah hah! Beat me to it! Yes, please check all the components in this circuit. I’ve seen several boards, especially early revisions, have broken solder here because they used the legs of the transistors and resistors to form traces that weren’t printed on the board. If that does not solve the...
  8. BackInTime82

    FS Game: Star Trek upright - Memphis, TN

    Thanks for posting the detailed photos. It's nice to see the arrangement of components and wiring inside a largely untouched cabinet for future reference. So many of these were converted (duh) to other configurations and bringing them back to original can sometimes pose a challenge. For any...
  9. BackInTime82

    FS Game: Sega Gremlin Invinco/Head on 2 Trimline project

    Ditto. Seeing one intact makes up for that part out atrocity on eBay a few months back.
  10. BackInTime82

    SOLD - GAME Space Invaders

    Nice job on the cabinet and very fair price!
  11. BackInTime82

    G08 repair issue

    I don't use the Vector Labs test pattern generator so I'm unfamiliar with its options and settings. Is this supposed to draw a white cross hatch or an individual color like red or green? The white dot in the center along with all the white retrace lines that should be blanked leads me to believe...
  12. BackInTime82

    SOLD - PARTS Sega go8 monitor

    This should be picked up instantly! If the person who grabs this needs the rest of the chassis, I have everything to make it complete on my website. PS - Interesting monitor frame. Maybe it came from a cocktail cabinet?
  13. BackInTime82

    FS Parts: NOS Atari 5 kΩ Slip Clutch, Extra Life Potentiometers (EJC1N048F502M)

    I still have just a handful more. I’ll mark the thread sold when they are sold completely.
  14. BackInTime82

    Two vector xy cocktail tables

    I agree with @Dillweed. While I can't help you on sourcing logic boards, don't give up if you can't find them in a week or so. These are definitely worth saving given their condition. I see so many games like this get converted to something stupid or sold for parts due to impatience. Keep...
  15. BackInTime82

    MMAO - Parts: G08-105 high voltage cage

    Thanks for sending me the note via the website. FYI, this later revision high voltage unit can be used on any G08 (-003 or -105). There isn't anything functionally different other than combining a bunch of the components from the EHT satellite board and fixing other trace bodges from the more...
  16. BackInTime82

    SOLD - PARTS Space Fury Logic Set with Warranty

    This set is now sold. I occasionally post Space Fury and other G80 titles when I accumulate the individual cards to make a complete set. Keep your eyes peeled for more soon!
  17. BackInTime82

    go8-cbo Star Trek

    Capacitors are the least likely point of failure on the G08 unless you are blowing line fuses due to a shorted filter cap (rare but I've seen it a couple times). When you have partial collapse that comes and goes there is a semiconductor that is likely damaged (current leakage) and/or you have...
  18. BackInTime82

    19V1001 Glowing White Hot Resistor

    Have you checked the video amplifer bias? Anything that has a service-adjustable circuit should always be re-checked before going down rabbit holes. Page 8 of the service manual: Adjust video bias control (R206) for 45 volts DC on collector of video output transistor (Q203) with no signal...
  19. BackInTime82

    SOLD - PARTS Space Fury Logic Set with Warranty

    Complete with the elusive Battlestar sound board, this Space Fury logic set has been rebuilt, burn in tested for several days and ready for play. Authentic Digital Speech - Enjoy the lifelike and accurate accents of the SP0250 Orator chip. Cutting edge for the early 1980s. True Analog Sound -...
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