You can compare the diode wiring with any other switch, the diode should be wired the same way for all of them. It looks like S and R targets are in the same column, according to the switch matrix chart. When those targets stop working, do the pop bumpers and other switches on the same column stop working as well? Check each switch on column 6 (green arrows pointing to it on chart) when the problem happens and see if they still work or not.

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Ah, sorry bout that. In that case, I'd look at all the switches on Row 1 (including the tilt switches) for broken/loose wire or diode. Row 1 appears to include at least one of each of those drop targets you mentioned, plus the outhole switch. Did you verify the wiring and orientation of the diode at the outhole switch are correct? Do any of the other switches on row 1 work when the problem occurs?

Ah, thanks for clarifying which switches they are on the chart. Look at Row 8 (horizontal row at bottom of chart), both of the switches you're having trouble with are on that row. Check each switch on that row (including the high score reset switch on the coin door)... Each of those switches should have a white/gray wire (or 2). You'll be looking for a broken wire or diode that needs to be reconnected. When the targets stop working, do the other switches on that row still work?

I just purchased a stellar Wars and have a similar problem. I just started to work on the machine and really haven't got into it. The L used to flash, but not go solid once the target was hit. However, I replaced the bulb and it started working again. My guess is one of the wires on the bulb socket was loose.

Another possibility is the brass U brackets on the back of each of the drop targets. Mine were in really bad shape. Maybe yours aren't making a full connection.

Did this do the trick? My Stellar Wars had a very similar problem where the drops went down, scored, but didn't register letters. I took all the drop mechs apart and clean the horseshoes; it was amazing what kept coming off them.

Let's see some pic of everyone's Stellar Wars. Here's mine. I have the same problems as you guys and I'm in the middle of rebuilding my drop targets. Additionally one of my letters doesn't register. My back glass was shot and I had to reseal it. This a good thread for all of us to communicate and share our findings.

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I just rebuilt my drop targets and found that 3 of my targets aren't registering. Additionally, 1 row of drop targets won't come back up. So I slowly captured a target while it was dropping and rubbed it up and down (pushing it towards the little board) to help clean the contact point and managed to get them all registering, but one row still won't come back up. I didn't replace the little boards on the back. I believe this is where the problem lies. Later after reading some other forums, it sounds like you can put some PBR Grease on the board contact spots. This will help with the connection between the Horse shoe bracket and the little board. I couldn't find it on line, so I think I'll try some 3 in1 oil and report back.

I here ya. It's new to me too, but I'm seeing it as a last resort before trying to replace the circuit boards. I might as well try it. I read that you can wax the contact points too.

So I put a little 3 in 1oil on the drop target circuit boards and for now they work like a champ. Everything is registering and the targets are coming back up. We'll see what happens in the long run.

Would anyone with a Stellar Wars mind sending me a picture of the wiring on the top right 3-bank drop targets please?

Thanks!

I was making room on my phone and just erased some good photos for you. This is the only one I have left for under the play field. Maybe you can match it up with the left side drop targets?

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lol, I need the back side of the 3 drop bank in the bottom right of your pic. I need the wire hook ups on the back side. Think you could weasel your phone back there for a pic? =)

Haha, I figured that's what you needed, but I sold it. Sorry, I was just hoping it was enough and trying to bump the thread for you.