Search found 1771 matches

by sylvain
Tue May 14, 2024 8:49 pm
Forum: Pinball and Videogame Tech
Topic: Is there a replacement for Gottlieb A16 boards ?
Replies: 6
Views: 152

Re: Is there a replacement for Gottlieb A16 boards ?

To answer your question, yes - same value, same tolerance, same power dissipation (or use a 10W slightly larger, with same other specs). Check if the replacement resistor is 'flameproof'. I often order from Digikey.ca If they do not have it, Sayal in Toronto or eBay would be good possible alternate ...
by sylvain
Sat May 11, 2024 3:42 pm
Forum: Projects
Topic: Coffee-Mat Star Battle Pinball Repairs
Replies: 13
Views: 369

Re: Coffee-Mat Star Battle Pinball Repairs

Well done Cjs001, Bravo! I think I have all six sounds on the Star Battle now - the Tone A & B potentiometers needed to be adjusted. Need more time to test and confirm. The confirmed tones produced by this Coffee-Mat Star Battle are: 1- Credit (coin switch) 2- Tilt 3- Free Ball (Extra ball award...
by sylvain
Wed May 08, 2024 7:18 pm
Forum: Projects
Topic: Coffee-Mat Star Battle Pinball Repairs
Replies: 13
Views: 369

Re: Coffee-Mat Star Battle Pinball Repairs

Thanks all !
by sylvain
Tue May 07, 2024 8:07 pm
Forum: Projects
Topic: Coffee-Mat Star Battle Pinball Repairs
Replies: 13
Views: 369

Re: Coffee-Mat Star Battle Pinball Repairs

For info: I received a PM last night from a new MAACA member who owns a working Coffee-Mat Cosmic Wars with a few sounds missing too. Similar electronics. He was going to check electrolytic capacitors on his board. Regarding the comment in the original post: “I still need to replace U6 on the main l...
by sylvain
Mon May 06, 2024 6:43 pm
Forum: Projects
Topic: Coffee-Mat Star Battle Pinball Repairs
Replies: 13
Views: 369

Re: Coffee-Mat Star Battle Pinball Repairs

Oh cool, thanks Xylog for this info. On the roof of your Sunfire? Wow, impressive!
...I am aware that the machine went to at least one other MAACA member before being traded to the person I am now repairing it for.
Small World indeed!
by sylvain
Sat May 04, 2024 3:56 pm
Forum: Projects
Topic: Coffee-Mat Star Battle Pinball Repairs
Replies: 13
Views: 369

Coffee-Mat Star Battle Pinball Repairs

While always busy at work and at home with limited spare time available, managed to progress on this interesting and rare circa 1978? or so early solid-state Coffee-Mat Star Battle cocktail pinball machine that someone brought me to repair a few weeks ago. Not much info on the web on this one. DSCF0...
by sylvain
Mon Apr 15, 2024 8:35 pm
Forum: Pinball machines (EM)
Topic: Gottlieb’s - Pro Football review
Replies: 17
Views: 1919

Re: Gottlieb’s - Pro Football review

Jeff, Looking at the videos, it appears that: - the G relay stays activated correctly for the full expected time, perfect. - But the BB relay drops after 3 or 4 pulses around when H gets activated. Still most probably score motor contacts. Check score motor 2C contacts first. Could you please post a...
by sylvain
Mon Apr 01, 2024 7:27 pm
Forum: Pinball machines (EM)
Topic: Gottlieb’s - Pro Football review
Replies: 17
Views: 1919

Re: Gottlieb’s - Pro Football review

The issue is most probably on the score motor if you already have tightened the relays' contacts stacks and cleaned & adjusted/gapped their contacts (relays BB, G, and H delay relay). Chances are that either score motor 1A contact is dirty or not gapped properly, or if BB & G relays drop bef...
by sylvain
Tue Mar 26, 2024 7:15 pm
Forum: Pinball machines (EM)
Topic: Gottlieb’s - Pro Football review
Replies: 17
Views: 1919

Re: Gottlieb’s - Pro Football review

Looking at the schematics, the G and BB relays and their contacts need to close and stay closed for 1/3 score motor rotation, e.g. for the 5 impulses of score motor 1A to make it to the 1000 pts relay coil for a touchdown (I assume another contact adds the other pulse for 6 points total). From my ex...
by sylvain
Mon Mar 18, 2024 8:25 pm
Forum: Projects
Topic: Gottlieb Stargate Restauration
Replies: 59
Views: 1642

Re: Gottlieb Stargate Restauration

Wow, impressionnant, Bravo!
by sylvain
Sun Feb 11, 2024 8:02 pm
Forum: Pinball and Videogame Tech
Topic: Gottlieb Arena proper fuses rating
Replies: 3
Views: 207

Re: Gottlieb Arena proper fuses rating

It appears the manual indicates the actual circuits/voltages that the fuses protect, where the fuse card indicates the fuse ratings of the fuses themselves. Indeed this could lead to potential confusion. What is important is the current rating of the fuses along with their fast/slow blow ratings. Ne...
by sylvain
Wed Dec 20, 2023 3:48 pm
Forum: Stuff Sold and Old Ads (>6months)
Topic: Sold and gone: 1977 Bally Eight Ball pinball machine
Replies: 4
Views: 490

Re: Sold pending pickup & payment: 1977 Bally Eight Ball pinball machine

Sold and gone to a good home.
Thanks for the interest!
by sylvain
Wed Dec 20, 2023 9:48 am
Forum: Stuff Sold and Old Ads (>6months)
Topic: Sold and gone: 1977 Bally Eight Ball pinball machine
Replies: 4
Views: 490

Re: FS: 1977 Bally Eight Ball pinball machine

Thanks all for the useful info and kind words !
by sylvain
Sat Dec 16, 2023 2:51 pm
Forum: Stuff Sold and Old Ads (>6months)
Topic: Sold and gone: 1977 Bally Eight Ball pinball machine
Replies: 4
Views: 490

Sold and gone: 1977 Bally Eight Ball pinball machine

For Sale: 1977 Bally Eight Ball pinball machine Works great and fast, many new parts including rubber rings, leg levellers, pinball, some bulbs, some electronic parts, etc. Nice playfield & backglass. One broken plastic. Usual cabinet dings and scratches, overall nice. MPU had corrosion, neutral...
by sylvain
Tue Nov 28, 2023 8:04 pm
Forum: Pinball and Videogame Tech
Topic: Playfield Coffee table
Replies: 3
Views: 380

Re: Playfield Coffee table

It would be better to use LEDs for a lot less power and heat. Otherwise, use #47 bulbs instead of #44: #47 bulbs use 0.15A each at 6.3VAC #44 or #555 bulbs use 0.25A each at 6.3VAC Tally the number of bulbs and multiply by individual bulb power drain to get the current need, and add a bit for buffer...
by sylvain
Mon Nov 20, 2023 7:37 pm
Forum: Pinball and Videogame Tech
Topic: Kiss Sound board problems
Replies: 3
Views: 435

Re: Kiss Sound board problems

Congrats for having fixed your board and detailed the solution - well done!
by sylvain
Sat Nov 18, 2023 1:39 pm
Forum: MAACA Forum and Chat
Topic: Back in business
Replies: 8
Views: 639

Re: Back in business

Looks great, bravo !
by sylvain
Fri Nov 03, 2023 9:01 pm
Forum: Pinball Parts for Sale
Topic: OTTAWA Bally and Williams Plasma Displays
Replies: 3
Views: 455

Re: OTTAWA Bally and Williams Plasma Displays

I'd be interested in those 7-digit displays if they are still available.
PM sent. Thanks
by sylvain
Wed Nov 01, 2023 7:24 pm
Forum: MAACA Forum and Chat
Topic: Williams High Speed
Replies: 12
Views: 789

Re: Williams High Speed

Sound like there is a locked-on solenoid, caused by either a stuck switch (if special solenoids: slings, pop-bumpers), and a shorted associated drive transistor for that coil on the MPU board. The overheated coil (and its diode) probably needs replacement too if it has shorted internally. I assume t...
by sylvain
Mon Oct 30, 2023 6:57 pm
Forum: Pinball and Videogame Tech
Topic: Kiss Sound board problems
Replies: 3
Views: 435

Re: Kiss Sound board problems

Did the sound work initially before replacing every other board and repinning? Any chip burning hot on the sound board? (if so it is probably bad). I seem to recall that the Sustain potentiometer's adjustment is fairly critical to get sound too. I would also check voltages according to the diagram, ...
by sylvain
Mon Oct 23, 2023 8:04 pm
Forum: Pinball and Videogame Tech
Topic: LF: techs that want to tinker with weird small EM projects
Replies: 4
Views: 538

Re: LF: techs that want to tinker with weird small EM projects

Indeed those projects are fun. Always great opportunity to learn and be amazed by old technology and designs.
I wish I had more spare time - maybe one day I'll be able to retire eventually!
I might be able to help next year if you still have some projects that need attention.
by sylvain
Thu Oct 05, 2023 6:05 pm
Forum: Pinball and Videogame Tech
Topic: Bally 6803 credit match display out
Replies: 9
Views: 439

Re: Bally 6803 credit match display out

Hmm, interesting.
Does the issue still occur with switch matrix connectors J3 & J4 disconnected at the MPU?
Display connector J2 has no cold solder joints at the MPU?
by sylvain
Thu Oct 05, 2023 4:01 pm
Forum: Pinball and Videogame Tech
Topic: Bally 6803 credit match display out
Replies: 9
Views: 439

Re: Bally 6803 credit match display out

Something appears bad on the credit/match board - either shorted glass internally, bad U1 decoder chip, etc.
Have you tried a different 6-digit display in its place yet (make sure machine is OFF prior to disconnect/reconnect connectors).
Good luck!
by sylvain
Fri Sep 29, 2023 8:54 pm
Forum: Pinball and Videogame Tech
Topic: Bally mpu J4
Replies: 5
Views: 463

Re: Bally mpu J4

I would recommend to fix it. There is a reason why it was designed that way originally. With the age of those machines, missing one out of two ground pins might work for now, however over time a bit of resistance in the remaining connector pin might develop. That could lead to a small ground voltage...