Black Hole question - lower playfield 313 lamps shorted?

astrodan88

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Black Hole question - lower playfield 313 lamps shorted?

Hi all,

I'm having some trouble with my Black hole and hoping someone can help.
I was trying out some leds in the machine and in my ignorance used standard bulbs in the 313 sockets that illuminate the lower playfield. I didn't realize my mistake till the fuse for the solenoid voltage blew.

After realizing what I had done I reinstalled 313 bulbs but the fuse still blows when these lamps are illuminated. I removed the bulbs altogether but still the same result. I have checked all related transistors and coils and everything is good there. If I remove the wire supplying these bulbs voltage (orange-slate-slate at the L relay under the lower playfield) everything is fine, the lower playfield plays perfectly; but of course, the 313 lights don't work.

Forgive my ignorance, but I'm at a loss as to what to do next. With the problem narrowed down to the lights, I thought new bulbs would be sufficient. Have the lamp sockets been damaged by leaving incorrect bulbs installed?
 
what kind of bulbs were you cramming into the 313 sockets? might have possibly cause one of the sockets to be shorted? im not really sure, just something i would question myself if i had done this.
 
what kind of bulbs were you cramming into the 313 sockets? might have possibly cause one of the sockets to be shorted? im not really sure, just something i would question myself if i had done this.

As I already mentioned, I was putting leds in. No cramming necessary; 313 bulbs are the same size as your standard 44 bulbs. I don't think you know what kind of bulbs I'm referring to here.


Any Black Hole experts out there with wisdom to share?
 
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Size doesn't matter. Those 313s have 28v coming through them (if I remember correctly, I don't have a manual handy). The LED equivalent to the 44s you mentioned can only handle 6.3v.
I'm not sure if there even is an LED to replace the 313.

I guess that wasn't your question, though. You were looking for what to do next. I have a pretty full day today, and I won't be able to get to a schematic until tomorrow, but off the top of my head I would guess that you possibly blew a transistor on the driver board. Again, just a guess since I haven't worked on my BH in years and I don't have the schematic in front of me.
The logical thing to do is to get a schematic and trace those lamps back from the sockets to the fuse and see where they go through the PCBs. I believe the 313s are driver board controlled because they aren't just GI; they turn on and off depending on what you're doing or what else is lit.
 
Alternatively, you could go through and connect each light in order until you find one that is shorted and makes them all blow.
You could probably test the bulbs for shorts, too, but I can't remember how.
 
Might want to check to see that the base of the lamp holder did not rotate and contact the ground. Or that the insulator did not frag on one.
 
As I already mentioned, I was putting leds in. No cramming necessary; 313 bulbs are the same size as your standard 44 bulbs. I don't think you know what kind of bulbs I'm referring to here.


Any Black Hole experts out there with wisdom to share?



you didnt mention that you were using 313 led replacements, you just said you were putting led's in place of your 313. i dont know what knowledge you have, so i was just asking a question sorry if i offended you
 
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