(Topic ID: 224629)

Johnny mnemonic pinball keeps blowing main fuse above switch


By radfordian3505

7 months ago



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  • 15 posts
  • 5 Pinsiders participating
  • Latest reply 6 months ago by biglaw
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#1 7 months ago

please help my Johnny mnemonic pinball machine keeps blowing the main fuse right above the main switch.what would cause this? it played just fine until today. I noticed the fuse in it was a bussman 5amp gma and it's really small compared to my other machines but the holder is that size and i went and bought more fuses and t blew them all

#2 7 months ago
Quoted from radfordian3505:

please help my Johnny mnemonic pinball machine keeps blowing the main fuse right above the main switch.what would cause this? it played just fine until today. I noticed the fuse in it was a bussman 5amp gma and it's really small compared to my other machines but the holder is that size and i went and bought more fuses and t blew them all

It would help with photos. This description is ambiguous, and being an owner of a JM, I can not picture the location you are discussing.

#3 7 months ago

I found my problem my fliptronics board got a power surge during a storm and it is fryed.gonna order a rottendog replacement. Will this fix the issue?

20180903_165934 (resized).jpg20180903_165941 (resized).jpg
#4 7 months ago

the fuse is the screw in fuse located inside the cabinet like all machines

#5 7 months ago

Which fuse is blowing...F### ?

Reference the manual here:

https://www.ipdb.org/search.pl?any=mnemonic&search=Search+Database&searchtype=quick

Page 1-44...which fuse is blowing?

#6 7 months ago
Quoted from NPO:

Which fuse is blowing...F### ?
Reference the manual here:
https://www.ipdb.org/search.pl?any=mnemonic&search=Search+Database&searchtype=quick
Page 1-44...which fuse is blowing?

He mentioned it: The main fuse inside the power box on the right side of the cab.

Op: the lightning strike probably took out your varistor as well, open the power box and check. If it hasn't, unplug power to all boards, replace main fuse. Turn on game, and plug in one board at a time until the mainline fuse blows. This will tell you what board(s) have the issue.

#7 7 months ago
Quoted from dsuperbee:

He mentioned it: The main fuse inside the power box on the right side of the cab.
Op: the lightning strike probably took out your varistor as well, open the power box and check. If it hasn't, unplug power to all boards, replace main fuse. Turn on game, and plug in one board at a time until the mainline fuse blows. This will tell you what board(s) have the issue.

Tracking. You were able to discern what he meant. I assume nothing until I know for sure. I do not like helping people if I feel unsure about what is in question. Don't want to help someone only to inadvertently damage something else.

OP, good advice by the post above. Let us know what you find.

The fuse next to the power switch is rated a slo-blo 8A per page 1-44 of the JM manual. 5A is not enough.

#8 7 months ago

ok will do and it's strange my main fuse holder is smallerer to fit the 5a and there is a sticker that says 5a 250v

#9 7 months ago
Quoted from radfordian3505:

ok will do and it's strange my main fuse holder is smallerer to fit the 5a and there is a sticker that says 5a 250v

Is your game a re-import? Does it have any stickers indicating it was designed for 230V?

#10 7 months ago

no it's not a report and where is the varistor located and I just hope i can fix it with a 65 dollar rottendog board bc this game is prestine

#11 7 months ago
Quoted from radfordian3505:

no it's not a report and where is the varistor located and I just hope i can fix it with a 65 dollar rottendog board bc this game is prestine

It's in the metal box that house the main 8A fuse as well as the power switch for the game

#12 7 months ago
Quoted from radfordian3505:

no it's not a report and where is the varistor located and I just hope i can fix it with a 65 dollar rottendog board bc this game is prestine

Here you go: https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Game_blows_power_line_circuit_breaker_immediately

#13 7 months ago

I just took power assembly apart and I can't tell if varistor is bad

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#14 7 months ago

your last picture looks like some of the insulation has burnt off, or has a hole in it.
Black wire left side

2 weeks later
#15 6 months ago

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