(Topic ID: 258133)

Socerer: Most Controlled Lights Out

By RCA1

4 years ago



Topic Stats

  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 4 years ago by RCA1
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#1 4 years ago

Played a game on my Sorcerer tonight and realized that most of the controlled lights were out.
Game has been solid with no issues until now. Most bulbs were changed to LEDs quite a while ago.
The only controlled lights working seemed to be column 2. Seems like pretty much everything else was out.
Opened the backbox and could smell toasted electronics.
Resistor R103 was visibly toast. Didn't see any other damage.
Is that likely the only problem, or should I be looking for more?
That resistor shows in the manual as 27 ohm, 2 watt. Ideas on where to source that?

Thanks!

#2 4 years ago

Great plains electronics stocks a 27 ohm 5 watt that looks like it would be a suitable/better replacement. Might want to just change all 8 of them if you're gonna do it: https://www.greatplainselectronics.com/proddetail.asp?prod=RC5W-27-SQT

Hard to say exactly what you're dealing with here, besides the burnt resistor. Given how many lamps seem affected, I'm inclined to think possibly a bad PIA on the MPU at U14, and/or possibly bad 7408 chips at U53+U54. Are any of those chips socketed?

#3 4 years ago

Thanks.
Yeah, all 8 of those resistors look original, and clean. Except one that fried.
None of those chips are socketed. I don't see any signs of previous work on those either.
I would probably replace resistors myself, but I'll send the board out if the chips need to be replaced.

(Dirty Harry voice) A man's gotta know his limitations.

1 month later
#4 4 years ago
Quoted from RCA1:

I'll send the board out if the chips need to be replaced.

Board is on it's way back to me. Should be back up and running this weekend.
Thanks Mr. Hibler!

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