Hi Guys,

Quick question for the pros. I noticed my JD occasionally calls out "Rock" while adding points even tho there's no ball in play. I have a hunch it might be related to the drop targets, but I just can't seem find what triggers that callout with google searches and also searching Pinside. I could go in and start moving wires, but I would like to be a little more methodical about it. After playing, it goes away rather quickly, so I assume it might just be a switch that needs adjusted. No error dots, but I have not went into the diagnostic yet to test switches.

Hi Gun,

No, definitely not "Watch it". But it could be 'lock' or something else that sounds like it. I've wondered that myself if that was one of the reasons I couldn't find any info on the problem. One thing I might do is turn it on again, hoping is does it again, then manually start tripping switches until it goes away. I have a scope, USB logic analyzer, DVM - so I can fix whatever is wrong, just have to figure out where to start! Another thing would be to watch the score and see how much it increases - that might point me in the right direction. But the DMD is also busy with animations...so that might not pan out.

Now that I think about it and based on what I think was on the DMD...it might have been 'stop!' because I think JD fires a gun. Hmmm...

Thanks for your comment!

Thanks Guys, Going to investigate it further now. "Drock"...ha, I'll have to look it up. Besides this hiccup, JD has been one solid solid game for the past year. Running the latest code (L7?), no Deadworld mod - just the original ring w/the slots.

Will report back later...

Thanks!

Yep, after Jedi's (and others) comment...I'm rather certain it's Drock. Good call.

Took the glass off when it acted up after first turning on. Tried to manually get it to go away...which I did, but not certain when. Not the drop targets, not the "?" target, not any obvious roll-over switches or the captive balls...seemed to be around the back somewhere. But not sure due to the likeliness of going thru multi optos or switches. Will try again Monday.

MT45 - thank you for the link - I'll check that out. I'm rather interested figuring out the history of Dredd.

Thanks to all that chimed in, much appreciated!

Will do guys (or gals).

Will see if I have time Mon. eve to sort it out. Will dig into diagnostics and see what is going on. But I think the best test is to start a game and try to note when the problem stops, or at least to narrow it down some.

I originally thought it might be related to the drop targets since I replaced a damaged target recently - doesn't appear to be an area of concern tho.

Thanks for all your inputs!

Got a DVM or a scope to start chasing down voltages (or lack of)?

altan likely knows more about JD than I, but I'll try to chime in and help.

Take a look at pages 3-20 to 3-22 of the manual, that shows the flipper circuitry. Try to note some of the voltages that power the flippers and the boards associated with the flippers - and check those. As altan sort of indirectly eluded to, J116, pin 2 supplies +12V to the boards. I think the +12V is supplied by either fuse F116 or maybe F115 (have to look that up). Check that fuse for certain.

How well can you follow a schematic?

Also, is the coin door shut when you try the flippers?

Considering +50V powers the flippers that would be a good place to check too.

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oops..you beat me to the punch!

Good deal, wolfman. JD is a great game, really enjoy it. I have a ColorDMD too, makes all the difference!

The ColorDMD really makes a significant diff, doesn't it? I think the monochromatic (aka single color) display makes it really hard to see what is going on and is hard on the eyes. The color display really is a game changer, IMHO - and they did a great job w/the software. Install it yourself next time. It's like a 10 min install. TOTAN to the left of it?

I don't think I've ever seen that translight, where did you find that?

Thanks Bartron!

I bet you hooked up the connector that went to J116!

The sniper tower...nice, I've seen that before. I'd like to print one myself, but obviously the individual wouldn't want to release the file.

Have to sort out where it's at, here is where it hooks up at..

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Found it. Back left corner of head.

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Hi Medi,

Would you be interested in selling an unpainted one?

Alex,

Here you go (state side tho) http://www.marcospecialties.com/pinball-parts/03-8936

I've been looking for the Pursuit plastics, where did you find them?

Congrats! Didn't know much about JD when I bought mine, but it looked intriguing. Only discovered the good rule set after playing. Glad we went for it. Can be a very challenging game at times but remains fun enough that a quick game can be enjoyable. And the price is still reasonable. Great artwork and the sound is excellent. It's a keeper. Should be rated higher than the 50ish range. As I mentioned in a prior post, and other people have also chimed in - the ColorDMD is a fantastic addition...really improves the game. Might want to look onto that.

Ditto here too. Almost to the point of breaking at the drop downs. I have a new rubber kit already. But I'm tempted to put in Titan's, which are synthetic - I think it is going to a royal PIA and and I only want to do it once.

I installed Titan Comps on the flippers and no doubt about - I enjoyed them much more. However, I do want to add the original rubber could have been well past their useful life. So likely not a good comparison. I actually got the Titan replace kit, but oops - yellow. Want a different color.

Really interested in the replies to you question.

Hey Soap,

The photobucket link appears broken.

Try some Titan Comp on those too! Made a huge difference on ours. Very responsive.

Very nice...mind sharing with your brethren JD'ers?

ChipS,

PM sent!

Very nice!

Quick question. The links you provided look like a static screen shot. Is there a file to download?

Just stuck a sub on mine...sounds nice!

I actually have 3 pins on one sub via a cheap mixer.

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Nice, did the PF have to come out to install?

ColorDMD, hook up a sub, art blades?

A little bit of a sidebar...installed Titan's on the flippers, not rubber. Much more responsive.

I've always thought the chromatic displays were a a little hard to decipher whlle playing the game. After getting the Colordmd...much easier and a lot of fun to watch.

I got a bunch of high res pics I can send. PM me your regular e-mail if you want them (I can't attach pics to a PM). Mind zooming out a bit so I can see where those are at?

Is this one of the connectors?

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Is this where it goes? Hard to tell from the pics.

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Ah...OK. Thanks for the zoomed in pics. Looking at mine, I think you are OK on the one connector. Or mine has the same kludge.
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P.S. Might want to zip tie the green ground wires away from the rail, they might get sliced.

And the 2nd mystery wire...looks like you are OK too. My JD below.

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Ours still 'holds it own' setting next to our newer pins. After a couple of years, it still gets played as much as the others.

Forgot to add in my prior post...add a powered sub! It sounds great! Don't need much - 8" is fine.

So you also made the base plate the 3 cooling towers are attached to?

Not that I'm aware of...
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I'll check shortly. I do recall installing the latest rom code that allowed an extended ball save. But I didn't adjust the replay.

I actually misread your post and was thinking it was about something else!

Just checked. I have the L7 ROM and Replay was set to Auto. Changed it to fixed and I could set it above 396M (not sure if that answered your question).

The one thing I didn't check for: Would it have indicated what the value was in Auto? When I changed from Auto to Fixed, then checked the value - it was at 150M (default).

Charlesd might have hit the nail on the head - maybe the Auto option? Looking at my SnipIt below, looks like you should be able to set it in the A.1 07 Adjustment. I can adjust and save above 396M.

Do you currently have it set to Auto or Fixed?

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I got the L7 version primarily for the longer ball save.

If you decide to go the L7 route, I think I got it from Matt's Basement Arcade. https://mattsbasementarcade.com/ Reasonable cost (I think around $15ish) and great, fast service. Bought a few times from him and completely satisfied each time.

Is this a shot that drops the center drop target (without actually hitting the D target)?

Hmmm...I'll have to go look for that switch! When I cleaned the drop targets a couple of years ago, I don't recall seeing a mechanism to perform that, but I admit I could have easily missed it.

I'm going to have to pop the top tonight and see what's under the hood!

Ditto here, for what it's worth.

Evan,

What actually drops the 'D' target? Looking at the manual, I don't spot it. Mancave mentioned a loop of wire? What solenoid actually pulls it down? Item 4 in the drawing pops them up.

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Thanks Howard - live and learn, I guess.

I've owned the pin for two years, and I don't recall ever seeing it drop (maybe I simply missed it). I can test this from the menu?

Son of a gun...it did drop in the test mode. LOL, never noticed that during game play!

Thanks for info guys.

Thanks Davi! Where in the heck did you get that image?!