Archive for February, 2002

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Oh Nos! Total Driver Board Hosage.

Sunday, February 17th, 2002

Removed D1 and D2. Both tested OK w/multi-meter. Replaced with new diodes anyway.

Since both of those tested good, I replaced and socketed the LM339 at U6.

Put the board back in the machine, BLECH! Very unhappy. On power-up random dots on the dot matrix display and several flashers on. Yikes. Turned it off quick.

Waited a little bit till I got my nerve back and turned the machine on again. Got the same random dots and flashers on.

“CHECK FUSES 114, 115” error message is back, and fuse 103 is very blown. The two flashers that are on are the romulan flasher and the right ramp flasher.

I definetely just made the problem worse[1].

[1] It turns out this was caused by me reconnecting a non-keyed ribbon cable backwards, and not by any repair attempts I made to the power driver board. FIXME: which cable? — 11/15/2006

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Power Driver Board Work

Saturday, February 16th, 2002

Replaced bridge rectifiers BR1 & BR2[1] on PDB.

TP2 → 5V OK (no change)
TP3 → 0.5V BAD (no change)
TP8 → 0.2V BAD (no change)

Damn. No help there. Next I replaced C7 and C6. Still no change.

Other candidates for replacement: D1, D2, Q2 (LM7812 voltage regulator for 12V circuits), LM339 at U6. These are all components connected to the 12V that should be at TP3.

[1] Looking back at this (I was still just getting my feet wet back then), it seems like Q2, the 12V regulator, would have been the obvious first choice for replacement — 11/15/2006

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Moat Flasher

Friday, February 15th, 2002

Right moat flasher is out.

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Updated T.O.M. Status

Tuesday, February 12th, 2002
  • Left “Hocus Pocus” isn’t working again.
  • Shooting the center staircase ramp doesn’t always register

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Creature Status

Sunday, February 10th, 2002

Creature is in reasonable shape:

  • Dot-matrix display makes nasty whining sound.
  • Bottom cabinet speaker is damaged.
  • Audio is scratchy and static-y
  • One of the rubber posts at the ramp entrances is missing a screw so the rubber keeps sliding up.

Test Report:

CHECK SWITCH 44 – ICE CREAM

Played for a bit and test report is gone.

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Hocus Pocus

Sunday, February 10th, 2002

Trimmed potentiometers on left & right “Hocus Pocus” eddy sensors. Both work great now.

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Prime Suspect

Saturday, February 9th, 2002

Removed the power driver board from the machine, making careful note of all the jumpers.

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Flipper Fixed

Saturday, February 9th, 2002

Swapped left & right flipper opto boards to see if phantom flipper problem switches to left flipper. Problem switched sides, so I replaced the flipper opto-board. [ FIXME – part no. ] Problem fixed.

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Some T.O.M. Fixes

Saturday, February 9th, 2002

Replaced some lamps. “Hat Magic” is still out, so the socket probably needs to be cleaned. I managed to unlight the lefthand “Lock” and “Safe” lights, so I need to go back under and check those.

On closer inspection, the left flipper coil not only has a disconnected wire, but is also missing a diode. A little hunting and I found the diode in the bottom of the cabinet. Went ahead and replaced the coil and sleeve with a Peach State FL-11629 equiv. that I had lying around.

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Theatre of Magic Status

Friday, February 8th, 2002

Overall, the machine is in pretty good shape:

  • Left flipper coil has a disconnected wire
  • Some lamps are out:
    • THEA(T)RE
    • MAGI(C)
    • Lite Vanish (#58)
    • Hat Magic
    • Lamp in Cube (#61)?
  • Needs a lock for the coin door.
  • Test Report is complaing about the left “Hocus Pocus” eddy switch.

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