Recent content by thzarr

Donkey Kong TKG-03 "vertical lines" / schematic? Donkey Kong TKG-03, 4 board version. ROMs: ok. Voltages: ok. Issue with "vertical lines" in "stagepicture" 25,50,75m etc.. shows as invisible lines through KONG and is more visible if "character ROMs" is removed.. and is correlated to the...

Taito Western Gun / Atari JET fighter / Breakout taito western gun. Atari JET figher sidepanel. (hardware saved - rebuild. wood:biohazard smell)

price check for atari video pinball pcb?

Update. Yoke failure The real problem was: Yoke failure / disintegrated convergens rings. Orion tube. The glue attacked the copper isolation. Take a look. http://www.ukvac.com/forum/b-on-mtc9000-drops-gradually_topic348727.html

Update: Changed Vertical IC, repaired alot of traces, replaced all burned/bad resistors, HOT. same result... =( Replaced the new HOT with another new one. Finally!! I fixed it. 130Vdc and picture. with LOPT HR7107 Lesson: If the IC measure OK, its not necessarly meaning its good.

" 7025 replaces Eldor 1105.0628 (Hantarex # 28021200)" cap and a coil near the flyback. I got that! but with the HR7107. So wrong flyback. I dont know if the chassi have worked with the new flyback or not. Something happened in the past. I guess The org. flyback blew and they replaced it...

Hantarex mtc 9000 w/o the blue contrastpot. Bad shape when I got it, .. burned r105, r110, burned traces... someone have replaced flyback w/HR7107 flyback (china) tr20, HOT (bu508a) R105 hot B+ ~65vdc After a time a kind of "vertical collapse" appear on the screen (picture) New caps...

reseated all the chips new caps looking for bad solder ~5.2vdc the blue horiz line is still there. Its only visible on the blue background (not effect clouds n trees) and just the first track. Not visible in the rest of the attract mode "demo scene" Any tips?

Fixing a Outrun Deluxe with a minor issue, a graphic glitch. A blue horz. line through the middle of the screen. in Test Mode everything checks "good" Seen it before?

Missprint in schematics? PSU section. X901 collector voltage? 145 vdc? I got 160vdc X902 collector voltage? 71 vdc? I got 45vdc B+ 120vdc Symptoms: The picture blooming/breath with white vs black scenes. Everything checked and rechecked in the PSU section, new solder and new x900...

1st MPU Borrowed the VideoDecoderRom from the 2nd MPU board and the Defender roared to Life! Still the 3-4 black/Blue bars before the rug. Alot of bars is missing. The Game works but with some graphic glitches. a lot of horizontal lines/dashes flicker/scatter around the screen. Due to wrong...

The old MPU pcb 1st MPU Back to the first MPU board. The ROMs 100% working. 1.st Picture is w/o the ROM pcb connected. Strange 4 wide jailbars. 2.nd picture the right look and that what it looked like before. (borrowed pic) I did change some 7474 and 74153. Defect chip?

2nd. MPU Did a 48h burnin test and the highscorelist screwed up. And now its stuck in bookkeeping with messy values. Solution. Bad connection pin 12 CMOS 5101

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2.nd MPU Bought a new untested MPU board and lucky me, It works!