(Topic ID: 251071)

Gottlieb Gladiators power problems - Starting with bridge rec values?

By Impzilla

38 days ago

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  • 16 posts
  • 5 Pinsiders participating
  • Latest reply 32 days ago by Benhurr
  • Topic is favorited by 1 Pinsider


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#1 38 days ago

My project Gladiators has some potential power issues due to some plugs getting moved around before I acquired it.

Checking the three bridge rectifiers:
The 48vdc bridge rectifier has 50vac in but the output is 65vdc, much higher than the 48vdc the schematic states.
Does this sound about right ?
If this indicates a defective bridge, whats the replacement part? I do not see any part numbers in the manual.

12vdc and 20vdc bridge rec matches schematic values.

I would like to confirm all other power values before getting into what boards got damaged due to the cables being swapped. This is the first machine of this generation I have owned and it looks like it has a lot of different voltages running everything.
Is there a single document that has all the power values and checkpoints ?

Thanks for any info.

#3 37 days ago
Quoted from Benhurr:

110VAC you might put the jumper for upper voltage and put the 120VAC jumper.

The 120v jumper is in, I have 116 coming in.
With 50VAC confirmed coming into the Bridge rec I would assume I would get the 48vdc out, but I am not.

#5 36 days ago
Quoted from Benhurr:

Rectifier bridge might to be change

I do not see a part number on this bridge, is there a spec or commonly used bridge I can replace with ?

#9 36 days ago
Quoted from Benhurr:

Those 3 Bridges rectifier are same

Since they are all three the same but one has out of spec output voltages, that one will be replaced.

Quoted from Pin_Guy:

The most commonly used replacement Bridge Rectifier used in pinball is the KPC3504

Found this part number and ordered for replacement.

I will update after the new bridge is installed.

#12 34 days ago
Quoted from Pin_Guy:

Full part number KBPC3504W (wire leads) or KBPC3504W (terminal leads)

Quoted from G-P-E:

Or GBPC3504, GBPC3504W

I have KBPC3504 coming in a few days.

#14 34 days ago
Quoted from Pin_Guy:

Hope you ordered the KBPC3504T version

The one I ordered has the tabs for the cables to connect to.
Thanks for the double check.

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