Blown main fuse

Hello everyone. So my no fear machine has been fine last few days no issues, little bit ago i turn it on and it comes on for seconds then goes completly dead. I checked main fuse and it was blown. I replaced fuse the came back on just wonder what or why the main fuse blew. Thanks

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#2 5 years ago

LTG

Pinside member

Hopkins, MN

12y 191K 56,905 24 7

If it doesn't happen again, crap happens. If it happens every time, something's wrong.

LTG : )

#3 5 years ago

???

wdennie

Inactive member

Canandaigua, NY

8y 37,350 1,321 17

what was the amperage, doesn't look like it was heavy enough.

#4 5 years ago

CRD

chad

Game Guy

11y 140K 15,084 9 4

Electronic fatigue.

#5 5 years ago

JON

johnny77

Inactive member

Was a 8 amp

1 week later

#6 5 years ago

JON

johnny77

Inactive member

Well the main is fine but the f112 is blowing as soon a door is shut. Ive un plugged coil wires and still blows. I dont know where to look.

#7 5 years ago

D G

Pin_Guy

Pinside member

What Pin are you working on?

#8 5 years ago

DEC

GRUMPY

Pinside member

10y 95,050 8,698

Quoted from Pin_Guy:
What Pin are you working on?

OP
Quoted from johnny77:
Hello everyone. So my no fear machine has been fine last few days no issues,

Just messing with you.

johnny77

Pin_Guy will get this sorted out for you in no time.

#9 5 years ago

JON

johnny77

Inactive member

Lol its a no fear. This is second game this week with issues. My luck sucks.

#10 5 years ago

D G

Pin_Guy

Pinside member

You likely have a blown bridge rectifier, this would be either BR1 on the Fliptronics board or BR3 on the Power Driver Board. You will need to remove J901 on the Fliptronics board and turn on the machine, if F112 still blows with J901 disconnected then the problem is on the power driver board; if the fuse doesnt blow, the problem is on the Fliptronics Board.

Since individual coil lines are fused on both the Power Driver and Fliptronics boards, its very unlikely that an issue past the Bridge Rectifiers would blow the main 50V fuse (F112)

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#11 5 years ago

JON

johnny77

Inactive member

So i disconnected j901 and fuse didnt blow. Coils kept cycling. So where to look on fliptronic board. Thanks.

#12 5 years ago

D G

Pin_Guy

Pinside member

OP
Quoted from johnny77:
So where to look on fliptronic board.

BR1 is going to be blown, if you want to further isolate it, you can reconnect J901 and disconnect J907 which will isolate BR1 on the Fliptronics board; if F112 blows with J901 connected and J907 disconnected (it should) then you know for sure that you need to replace BR1.

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#13 5 years ago

JON

johnny77

Inactive member

Yes sir with doing that fuse blew. So br1 need replaced. Thank you very much. Will order part now.

#14 5 years ago

D G

Pin_Guy

Pinside member

OP
Quoted from johnny77:
Yes sir with doing that fuse blew. So br1 need replaced. Thank you very much. Will order part now.

I would replace C2 (100uf 100V) electrolytic capacitor while you have the Fliptronics board on the bench; this part is super cheap and simple to replace, there is literally no reason not to.

#15 5 years ago

JON

johnny77

Inactive member

Ok i sure will. Your the best. Now to figure out flasher issue on f14. Smh

#16 5 years ago

JON

johnny77

Inactive member

There is no cap on c2. Only c1

#17 5 years ago

D G

Pin_Guy

Pinside member