| Arcade Collecting > Restorations & repair |
| Repairing Tatio Double Dragon Audio Issue |
| << < (3/4) > >> |
| PL1:
--- Quote from: finalfan7asy on June 15, 2021, 11:56:59 am ---I might look for an original DD board if my wire connections are compatible. Would all I need to do is plug my existing wire harness to the board’s edge connector? --- End quote --- It never hurts to double-check the PCB and harness pinouts when swapping boards, but reverting back to an original Double Dragon board should be plug-and-play. The edge connector on a Double Dragon board uses the very common JAMMA wiring standard. https://www.arcade-museum.com/game_detail.php?game_id=7619 The harness is probably original and the bootleg is probably a JAMMA board. If you want to double-check that the harness hasn't been altered, here's a JAMMA pinout. --- Quote from: finalfan7asy on June 15, 2021, 11:56:59 am ---Is there any websites that sell these other than eBay? --- End quote --- If "these" = wire harnesses: You almost certainly won't need to replace the harness, but there are many vendors that sell JAMMA harnesses. Watch out for the "CHAMMA" (Chinese JAMMA) harness used by many of the X-in-1 multi-game boards. - The CHAMMA harness changes some of the unused pins and grounds (pins 25-27+c-e) into button 4-6 inputs for P1 and P2 instead of using a separate "kick" harness for games that need those inputs. - IIRC when pins 27 and e are connected to ground (JAMMA standard), a CHAMMA PCB won't boot properly because it thinks those buttons are always pressed. If "these" = original Double Dragon boards: If you can repair the audio issue so the bootleg is working fine, it may not be worth the effort and expense to revert to original boards. :dunno You can put "want to buy" (WTB) posts in the Buy/Sell/Trade sub-forum and on KLOV like Gilrock advised. There are also vendors that sell used PCBs. Scott |
| finalfan7asy:
Great to hear! I might have more issues with the board than the sound. The jump and kick buttons inconsistently work and I need to disconnect/reconnect the harness connector until they start working. I initially thought it was the push buttons and quick disconnects so I’ve replaced them already with no luck. The harness wires appear to be seated tightly with no corrosion or visible defects. I believe this is my pinout diagram: |
| PL1:
Given the problems you're reporting, continuity/resistance check from the PCB to the farthest connection. - A good connection should have <2 Ohms resistance. - As always, make sure the power is disconnected . . . unless you want to fry your multimeter. >:D For example: Meter lead 1 Meter lead 2 | | PCB ---- Edge Connector ---- JAMMA Connector ---- Wire ---- Quick Disconnect ---- Button QD Tab Also check the PCB connector contacts and JAMMA connector contacts for dirt, corrosion, wear, and damage. Scott EDIT: At first glance, the euro-style terminals looked like a harness hack, but pg 4 of the Operating Manual shows that they were in the original cabinet. https://arcarc.xmission.com/PDF_Arcade_Manuals_and_Schematics/Double%20Dragon.pdf |
| finalfan7asy:
Thanks again for all your help! |
| finalfan7asy:
Also, what should I expect to pay for a working original DD board? |
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