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  1. GA61XX

    FS Parts: Atari K6100 input protection

    Atari early K6100 input protection board reproduction. many years ago i had a few friends that had imported Tempest machines, but the K6100 monitor did not have the input protection, the original Atari board # 038088-01 rev' 2, that was fitted to the Space Dual monitors and some of the last...
  2. GA61XX

    FS Parts: G05-801 Vector VD900 High Voltage Doubler

    G05-801 Vector VD900 High Voltage Doubler, Reproduction The first batch of this production run have been finished & tested, over the coming month i will be producing a fresh batch each week, so i will not need to make them for a long time. Due to the distance between Australia & the rest of the...
  3. GA61XX

    G05-801 Vector VD900 High Voltage Doubler

    It was a few years ago when i first made a batch of 10pcs G05-801 Vector VD900 High Voltage Doubler's these were for machines i was working on and supplied a few to other tech's here in Australia. i have had some interest from members here on KLOV and are now currently finishing and testing my...
  4. GA61XX

    G07 off centre & to the top

    ok.. here is one for the brain trust.. Ms Pac-Man.. G07 monitor when i bought the machine the picture was off to the right of screen and to the top, the 3 x adjusting tab's will not move the picture...... as the picture is off by 3" both way's .. yep three inches .. OMG .. how .. Ok.. i have...
  5. GA61XX

    Bally Power Driver board 74154 problem

    i have an early S.S. bally machine with a bad 74154 chip, replaced it with a 74HCT154 as that is what is common these days, but when i plug it back into the machine, press play, the solenoids strobe continually, like will start with side kickers then targets, pop bumpers and around again.. if...
  6. GA61XX

    G07 B+ve to high not adjust

    been struggling with this chassis for some time :( it is in aMs Pac-Man when i bought the machine F901 was blown, did a cap' kit and replaced the flyback, F901 blows again, replace transistors associated with this part of the circuit, but still no neck glow and B+ve is around 142v DC, can not...
  7. GA61XX

    Donkey Kong low background sound

    Ok.. i'm currently working on a 4 layer Donkey Kong board set, had a few graphics glitches & not background music, graphics problem was solved with dirty legs on many of the PROM chip's cleaning these also gave me the background music, but it is very low volume.. "yes" i have adjusted the...
  8. GA61XX

    B&W monitor Oop's

    now working on a 1973 Australian built version of Pong, this game is called Squash & made in Adelaide, it uses a locally made TV as a monitor.. Ok it was a little washed out, no Brightness control & the Contrast not to good.. Went through my capacitor stash found i had 70% of what is needed...
  9. GA61XX

    Fuji Speed Race

    well currently working on a Fuji Speed Race & it seams there is very little info out there, i have searched for hours, found the original was a Taito speed race then was also a Midway Wheel.. not sure what i should be looking for or what will be the closest schematic to use.. so Please help...
  10. GA61XX

    Help.. Asteroids keep disappearing/fading

    Ok.. this for a machine a friend has on site :) after you turn it on for about 10 min' the asteroids start to fade your ship stay's bright with no problem but it makes the game extra hard when can not see what is coming at you. cap' kit done on the AR board along with cap's on the main board ...
  11. GA61XX

    G05-801 panic attack ..

    Ok.. was given this monitor to repair ( G05-801 ) had been sitting un-used for over 10 years in a machine a friend just bought looks like some one had tryed to repair the high voltage cage OMG .. wrong diodes .. replaced with correct items.. then found the Voltage Doubler was dead.. replaced it...
  12. GA61XX

    NAMCO Galaxian Pin-out's

    After spending an hour trying to find any info about the Namco Galaxian board a friend was working on & not being able to find a pin-out diagram :( also as we were working via phone with chat & photo's (not easy as board not in front of me) we found most of the pin-out of this Namco are the...
  13. GA61XX

    Asteroids 1/4" ring on monitor

    Ok.. doing a scratch build of an Asteroids rebuilt / repaired the main Asteroids board, tested with my scope .. looks good.. then plugged into my XY G05-801 monitor.. a few adjustments later it's alive :) BUT i have a small glowing ring about 1/4" diameter in the center of the tube also noted i...
  14. GA61XX

    Asteroids board voltage drop

    Ok.. doing a scratch build of an Asteroids bough a game board tested Not working.. well that would be east if you have 5 volts So the problem is :- Re-built brick & power supply & get a good 6.2v unplugged (i read this is good) when plug to the board only get 2.5v Ok.. so where is best place to...
  15. GA61XX

    G05-802 build

    Ok.. been on the hunt for parts & nearly got all needed received my G05-802 frame today with yoke have a NOS tube & would like to know how hard up to the back of the tube i need to fit the yoke on the neck ? seen a few photo's & looks hard up to the back no wedges like i have on my color Raster...
  16. GA61XX

    Defender woes

    will start with this board was a basket case on first power up No video & RAM hot in seconds .. OMG .. pulled the 24 RAM chips to see a few sockets had been that hot & melted the sockets So test all 24 RAM in known working board set.. & got 24 fail :( i have removed & fitted a set of 24 sockets...
  17. GA61XX

    10 yard fight to Moon Patrol ?

    just had a barn find it's an Irem 10yard fight not a game i will ever play so would like to know if it was just a ROM swap to change it to Moon Patrol ?
  18. GA61XX

    W.G. 19V1001 dilemma

    Ok.. here is the problem.. for the past 6 months i have been going over my chassis & doing the regular service / cap' replacement work i have done 4 or 5 of these 19V1001 boards & noted that C237 comes in 2 flavours i have 2 sets of service manuals & both the 0.1uf & 0.47uf are to be found...
  19. GA61XX

    FS Parts: Space Invaders MB14241 custom chip

    Time to help others :) got a good number of these MB14241 chips ( will let go of 30pcs ) But they are here in Australia.. So may be best if some did a bulk buy for a single cost of post/shipping Customs as for the price $18.50 each .. will work with the person doing the bulk buy.. as they will...
  20. GA61XX

    WG 19V1001/3 calling those with knowladge

    Ok.. got another thread with some sort of problem .. shimmer.. well in the hunt for an answer i have now connected a scan line generator for the cross hatch pattern well besides i need rotate the yoke a few degrees to square it up it has a curve / bulge down one side .. on a color i would be...
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