(Topic ID: 193047)

Atari Airborne Avenger Pop Bumper Not Working

By Ramtuathal

6 years ago

Topic Stats

  • 9 posts
  • 2 Pinsiders participating
  • Latest reply 6 years ago by Zitt
  • No one calls this topic a favorite


Linked Games

Topic Gallery

View topic image gallery

20170711_005322 (resized).jpg
20170711_004926 (resized).jpg
20170710_235650 (resized).jpg
AAQwiring (resized).jpg
AAQimage (resized).jpg
20170708_011523 (resized).jpg
20170702_193523 (resized).jpg
20170708_013021 (resized).jpg
20170703_141903 (resized).jpg
20170703_140443 (resized).jpg
20170703_135658 (resized).jpg

#1 6 years ago

So far, I've replaced:
1) Blown fuse for Upper Right Thumper Bumper solenoid (2A, 125V FB, replaced with good fuse with same specs)
2) Q8 transistor (2N6044, replaced with NTE261)
3) Coil / diode / coil sleeve (coil A007030-01 (from Marco's)), new coil registers 8.8ohms as it should

The switch for the bumper "clicks" and gives the appropriate audio scoring report. The bumper assembly has been put back together correctly.

After transport, I plugged all the boards back in and when I fired up the game, the old Q8 transistor popped and smoked. Pulled Q8 off and it tested bad. Replaced it and the fuse that probably blew somewhere around when the transistor popped. Coil was fried, especially the coil sleeve, and the plunger was stuck halfway down. Replaced coil, cleaned old parts, reassembled. No action at all.

Help and advice appreciated.

20170703_135658 (resized).jpg20170703_135658 (resized).jpg
20170703_140443 (resized).jpg20170703_140443 (resized).jpg
20170703_141903 (resized).jpg20170703_141903 (resized).jpg
20170708_013021 (resized).jpg20170708_013021 (resized).jpg
20170702_193523 (resized).jpg20170702_193523 (resized).jpg
20170708_011523 (resized).jpg20170708_011523 (resized).jpg
AAQimage (resized).jpgAAQimage (resized).jpg
AAQwiring (resized).jpgAAQwiring (resized).jpg

#2 6 years ago

I don't know if this helps but the lamp for the upper right pop bumper is also out. Correct wires attached, new bulb installed - still no light.

#3 6 years ago

I should add that I tried the diagnostic test as well, no dice.

#5 6 years ago

Wondering about the messed up through hole where I replaced the transistor...

I don't know what else to look at other than checking the power (checking for broken wires), and I'm not sure how to do that. Anyone?

#6 6 years ago

Welp. One more bump before I go back to work.

#7 6 years ago

Well, Again - not familiar with Atari machines...
but there is one of two things. My assumption is the Pop is controlled by the CPU ... IE it detects a switch hit; then fires the offending coil. Unlike Gottlieb which fired the coil directly from the switch bump w/o CPU control. If my assumption is correct; then you have either an input or an output problem.

Input being the switch detection is fried or the Output drivers are fried.

So; on this game do the pop bumpers trigger a switch edge in the diagnostic menu?
If I were doing this on my 79 bally star trek; I'd put the system in switch test mode and hit the pop bumper switches. If all but this one registers... then you know it's something in the switch matrix.

If all pops trigger switches; then it's probably a output driver.
I think Bally debug wiki says you ground the tab of the driver transistor; if the coil fires - then the connection to the coil is good.
Then you work your way backward in the driver circuitry.
That said SOMEONE needs to confirm grounding the tab of the driver transistor is ok to do for Atari... DO NOT try my method without someone confirming it operates the same.
There isn't an equivalent section in the Atari debug wiki afaik:

Assuming you replaced the driver transistor (Q8) is still good; then I'd test the Diode behind it (CR16). If it's good; then test R20 as good. If that's good then might be D20 (the output latch).

However, given the amount of damage you have seen... I'd be more inclinded to believe there might be a burnt trace on the board. Have you done continuity between the collector (C) and the pin on the board (J8-16)?

#8 6 years ago

Thanks for your advice! I started backtracking the circuit in question and I found the problem when I started testing the continuity of Q8. When I replaced Q8, I noticed the through hole was "burnt" looking, but I tested continuity after replacing the 2N6044 with an NTE261 and it was "fine". Well, according to your suggestion, I retested continuity (note that the pinout on 2N6044 is BCE (left to right from the front), which is weird (in my limited transistor experience)) and I was getting OPEN from base to emitter (ground). I'm not sure why it worked before but didn't after reinstalling the board, but seems to be the case. Well, to fix the problem, I did some soldering that you won't be able to unsee, but it is functional for now. There was some sketchy soldering on that old Q8 in the first place, but I am not proud of the "through hole repair" I did either. Upper right pop bumper works with this messy monstrosity. (The lamp is still out, but I think that is one of the Ax logic chips...). Thanks again!

20170710_235650 (resized).jpg20170710_235650 (resized).jpg

20170711_004926 (resized).jpg20170711_004926 (resized).jpg

20170711_005322 (resized).jpg20170711_005322 (resized).jpg

Promoted items from the Pinside Marketplace
From: $ 8.00
Cabinet - Other
$ 1.00
Pinball Machine
Pinball Alley
Pinball Machine
From: $ 11.00
$ 37.00
Gameroom - Decorations
The Flipper Room
$ 5.00
Lighting - Led


Wanna join the discussion? Please sign in to reply to this topic.

Hey there! Welcome to Pinside!

Donate to Pinside

Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!

This page was printed from https://pinside.com/pinball/forum/topic/atari-airborne-avenger-pop-bumper-not-working and we tried optimising it for printing. Some page elements may have been deliberately hidden.

Scan the QR code on the left to jump to the URL this document was printed from.