(Topic ID: 119816)

Adjustment failure when starting machine

By Covey

6 years ago

Topic Stats

  • 10 posts
  • 4 Pinsiders participating
  • Latest reply 6 years ago by CNKay
  • Topic is favorited by 1 Pinsider


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#1 6 years ago

My Dr. Dude was starting up just fine. Decided to install remote battery holder to prevent future problems. Cut old one out, installed, now I get "adjustment failure" every time I start the game. Tried different batteries, checked,and replaced diode at D2 (it checked ok). I can start the game by going into menu and starting, and game plays fine. What am I missing? This was never an issue till now.


#3 6 years ago

Thanks, I'll give it a try

#6 6 years ago
Quoted from johnwartjr:

If that doesn't work, did you wire it up to the right places on the board? With the board in the game, + goes to the lower left solder pad, and - goes to the upper right.

Yes, wiring is correct. I originally had it it backwards(red on bottom right, black top left), but changed it last night. Could this have affected something else or just no connection?

Quoted from indypinhead:

The machine has lost all of its' settings.
Just go back in and manually set the settings...everything will be fine

Tried this but not doing the trick. Once I go through the settings, how do I "save" them? Seems like some things change, but others don't. For example, freeplay, # of balls, changes to what I changed to, but others, like # of pre lit lamps, HS's do not?

#8 6 years ago
Quoted from johnwartjr:

Test voltage at the 2 wires on the CPU board. Is it good?

4.5V DC with game on

Quoted from johnwartjr:

Then, move the red probe to both sides of D2. You should get some drop on the banded side of the diode - maybe 1/2 volt. Still good?

The band looks like it is on the lower leg of diode (bottom side of board). I'm getting 4.5V DC on top leg, 4.9V DC on bottom. Is the diode reversed? Should the band be on the top? I replaced it last night the same way the old one came out. I do wear glasses so could be these old eyes are wrong?

#9 6 years ago

With game off I'm getting voltage drop across D2 diode. 4.5 down to 4.2When powered up it increases 1/2 volt. Normal? 4.5 to 4.9 when powered. Checked D3 and tests ok.

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