Doodle Bug is such a cool EM. I have only just played one recently. The rules for this title are really neat. The artwork is very cool as well. They didn't make but 600 of these so you really do not see them much. Hopefully yours is a nice one.

Blown fuse could mean a bad coil. Check the match unit coil and the 10 point score reel coil..maybe one is burnt.

ha, i jinxed you with my EM woes! sorry dad.

the detached wire, where does it lead to?

is it power or a ground?

The 10 pt relay holds itself on until it sees the end of stroke switch on the 10 pt score reel open:
Doodle bug 10pt relay (resized).jpg
I'd start by having a close look at the EOS switch.

/Mark

What color is the wire, and what devices or relays can it reach? That would help find it on the schematic. Might it double up on the left solder lug of whatever relay is in your photo?

You could try to eliminate the EOS switch as a problem by putting a piece of folded paper in the other switch in that circuit: the normally open switch on the 10pt relay (blue-red to green-black). Then see if the relay still sticks on when activated. If that solves the problem one of those two switches, or the wiring around them is the issue.

Have you checked the match unit coil? The 10 point relay advances the match unit.

I predict replacing that will fix your fuse issue. This was likely caused by a 10 point switch being stuck and the 10 point relay not deactivating.

Since you are going to need to replace that coil anyway, just cut the wires off the lugs and see if the game stops blowing fuses.

Besides the pop bumpers, there are other switches on the playfield that score 10 including the sling shots and the standup switches behind a few rubbers. When one of these switches closes, the 10 point relay is activated which in turns activates the coil on the score reel and the match unit. If one of these switches becomes permanently closed, the 10 point relay, reel and match unit coils lock on. The larger coils, like the one on the match unit or on a chime unit will heat up quickly and are most likely to get damaged.

Excellent question. I'd like to understand that too because I don't see a straightforward answer on the schematic. The 10pt relay does fire (and can fry) the match unit advance coil. But the 10pt relay doesn't wait around for a signal from the match unit like it does for the 10pt score reel EOS switch so the match unit shouldn't be able to keep the 10pt relay on. Something else must be going on.

I wonder if the damaged match unit coil has an internal short. When it overheated it's possible that the insulation on some of the windings melted and allowed neighboring windings to short together. That would lower the resistance of the coil and make it draw more current from the transformer. Then when a 10 point switch closed, the 10 pt relay fired and called for both the 10 pt score reel and match unit coil to fire. With all three firing and the match unit coil drawing more than it should it's possible that the transformer couldn't supply enough power (through the backbox jones plug) to get the score reel to pull in enough to open the EOS switch.

When the 10pt relay locked on, did the 10 pt score reel advance? I wonder if the 10pt relay would have locked on if you had blocked the the 10pt EOS switch or the holder switch on the 10pt relay.

Ive recently aquired dipsy doodle for free.it was in dire straights. I will take some pictures when i get a chance. Sounds like some wires are crossed somewhere

Here is the chime knocker area

15346365492061507823414 (resized).jpg

Of course the misses thought the bell was too loud so i quieted it with some felt pads

Hi Freezebox , welcome to pinside.

Better to start a new thread and tell us there what's wrong with your machine.

10pt relay area

15346376843611232486958 (resized).jpg

Nothing wrong with my machine. Ive already gone over her and shes running fairly well. I may be new to this site but im not new to em machines been through a 3 month mechanical resto of a Royal Hawaiian shuffle alley. She put me through EM school. Lol just figured i throw some pics of those areas that ryanwanger was dealing with

166, I'm curious as to where you found an estimate for the production number of this machine?
Doddle Bug seemed to be quite common in the Mid Atlantic area; I used to own one and would often see them at different arcades in PA. I would have "guessed" that the production number was at least over 2000.
Didn't realize they only made 600?