EBD LE no lights no pop bumpers but good fuses - Im stumped

(Topic ID: 227068)

EBD LE no lights no pop bumpers but good fuses - Im stumped


By neopolss

7 days ago



Topic Stats

  • 8 posts
  • 4 Pinsiders participating
  • Latest reply 1 day ago by BigAl56
  • No one calls this topic a favorite

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#1 7 days ago

This eight ball has been a slow process to get going. It is technically playable, but certain things still arent working. Firstly, I have an alltek mpu and alltek solenoid driver pcb. All going good, voltages good. I have no playfield lights in the center, no solenoids that are part of the expander pcb. The three fuse block under the playfield had no fuses. I put in three 1a fuses. The lights came on and the fuse blew. I looked up the fuse ratings and discovered my mistake. Two fuses should be 10a. I swapped in the 10a but now - nothing. No light by the solenoid expansion pcb, no center lights, basically flippers and the right side bank. Any ideas? It is quite possible that multiple things are wrong. This pin was in horrendous non working shape.

#2 7 days ago

Check fuse on bottom power supply. Maybe its blown. If good the bridge rectifier may be open.

#3 6 days ago

Take it one at a time. Look at the schematic. Pullout your voltmeter and start measuring voltages.

#4 6 days ago

Check the bulbs. Maybe being under fused they are no longer working.

#5 5 days ago

Checking a few things. I find all fuses below are good. I rebuilt the power input pcb beforehand, still outputting good volts all across.measuring the solenoid expander pcb there is 43v present. Seems like there is an isue there since it has no activity. Im not going to focus on the lighting for now and just see about getting the playfield solenoids all working. My belief is that prior to owning this pinball it suffered some sort of voltage issue that took out a lot of parts. The original mpu, solenoid pcb, and squawk and talk were all non working.

#6 1 day ago

Update: searching here found another post with a similar issue and some sage advice. G.P.E mentioned checking for AC at the bridge on the rectifier pcb. Interestingly enough, when I set my dmm to AC and checked, I briefly had lights. Bad/loose/cold connection. I promptly pulled the pcb and reflowed new solder on my bridges and problem number 1 is solved. Now I have full playfield lights and a solenoid expander working. This pinball is making a recovery! Now I have only to solve the issue of no pop bumpers or slingshots (all other solenoids work). I'm starting with the J2 harness and working my way down. Since the knocker on the J2 DOES work, I'm suspecting a bad connector in need of repinning, but it is worth the time to make sure the signal from each is reaching the playfield.

#7 1 day ago

I would check yellow wires on coils. One is most likely broke. Slingshots and pop bumpers and particular.

#8 1 day ago

Measure the yellow wire voltage at the coils. Should be 43vDC. Check the solder connections on the sol expander board. There is a broken wire or a bad connection to the non working coils.

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