(Topic ID: 277735)

T2 DMD issues and game resetting as well.

By Arcade

3 years ago


Topic Heartbeat

Topic Stats

  • 271 posts
  • 9 Pinsiders participating
  • Latest reply 3 years ago by Arcade
  • Topic is favorited by 4 Pinsiders

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02_dmd_input.jpg
01_dmc_output.jpg
03_unregulated_12V_supply.jpg
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2019-02-02 14_20_45-WPC ribbon cable to reseat - Paint (resized).png
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#132 3 years ago
Quoted from Roamin:

Here, I decided to measure all the outputs of the transformer. You should disconnect the 3 output connectors (with the machine turned off) and then turn it on. Measure all the pairs I have color identified and compare the voltages. This way we'll see if the transformer is outputting correctly. The gray , gray/white and grey/green wires are center tap, so you'll read 20 Volts on each side and 40 volts from gray to gray/green
In the other connector , all 3 yellow are the same wire and all 4 yellow/white are the same wire so measurement can be taken from any pair. I would still test them all , leaving one probe on the yellow, then touching all yellow/white, and repeat again with all yellow wires. It should always read around 8v.
The 2 purple wires should measure 110 VAC
[quoted image]

LOVE that representation of the connectors! Very easy to see without having to find wire colors! Nice work!

#136 3 years ago
Quoted from DumbAss:

Excellent pictures.
Here's the wiring diagram. Please make sure this is consistent with an actual machine. I am not near a machine to verify. I've had my fair share of errors in Williams manuals to issue this warning.
[quoted image]
If verified then this is your picture of pins 1, 2 and 3. It should be BLK/BLK/WHT-BLK. Looks correct.
[quoted image]
This is your picture of pins 3, 6 and 9. It should be WHT-BLK/BRN/ORG. Looks correct.
[quoted image]
This is your picture of pins 9, 8 and 7. It should be ORG/WHT-ORG/WHT-ORG. Looks to be ORG/WHT-ORG/WHT-BRN. NOT correct.
[quoted image]
This is your picture of pins 7, 4 and 1. It should be WHT-ORG/WHT-BRN/BLK. Looks to be WHT-BRN/WHT-ORG/BLK. NOT correct.
[quoted image]
I can't easily verify that pin 5 is WHT-BRN.
So it looks like you should take the wire out of pin 4, put it in pin 7 and the wire from pin 7 to pin 4.
Please verify this against another machine. I am only operating on your pictures and manual schematics.

Excellent work DumbAss! Nice eye. Really hard to tell those wire colors from pictures.

#137 3 years ago

The people in this place (Pinside) are REALLY GREAT if you read the right threads and avoid the BS opinion and drama threads!

#148 3 years ago
Quoted from Arcade:

120.8, 98.8, 0,0,0,O, 66.6
Measured with J606 unplugged from controller board
Game still running. No resets yet
J606 has 15.5 volts and 5 volts maybe this is causing my missing 5 and 12 volt readings

J606 is the source of 12 and 5V. Plug them in and measure again.

#151 3 years ago
Quoted from Arcade:

Could a bad Dmd cause resets.
I have a spare known good one.
I already replaced the controller board earlier
Game is still running without a reset yet

Not likely... Bad DMDs will pull down the high voltage supplies but not 5V or 12V.

Best to start working though this list: https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Game_resets

#154 3 years ago
Quoted from Arcade:

Got it.
But I swapped displays and played an entire game with no issues
Will require further testing but so far so good.

Could be that it doesn't reset once it has warmed up. So test again tomorrow once the game has cooled back down.

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