Not the first time people have had issues with these boards. I've been using originals and X-Pins when the originals have lived their life. I can happily say that any issues I've had with those Brett has been very helpful in acknowledging the problem and shipping me replacement boards.

Nice work around.

He's busy moving to Florida.

I wonder is this just for the Data East power supply boards or do his Bally/Williams power boards have this issue also ?

holy shit; that's a major fux up.
IMHO; he owes you a fixed board.

Why would he owe markmon a board? He modified the speakers so he had to modify the board. If the machine was left stock I am sure the board provided adequate power.

People install custom speakers all the time. Why all of a sudden is this situation special? This is actually the first I've heard of this type of issue with custom speakers.

Simply put - the board was designed with improper voltage rails - not to spec of the original board. Designing a "replacement" board must require verification that it exceeds the specs of the NOS board it's replacing. It's clear that Rottendog did NOT validate their design before offering it for purchase.

I have the same issues Markmon was having. I'm running a Xpin power supply and pinball pro speaker kit. There was a thread about some other guys having the same problem as well but nobody noted what power supply and speakers they were useing.

Wish I had the stock power supply to test and see if it helps.

Found the other thread. It is names guns n roses sound problem.

Markmon did this mod on my board and it fixed my failing 12 volt problem. The game sound no longer cuts out when in multiball , magnets on, all flippers, ect. Works perfect. Game is GNR with pinball pro sound upgrade and Rottendog power supply. I have a extra board if anyone needs. First crack goes to a Pinsider who started a different thread with same problem. Pm me if interested and the other Pinsider does not respond.

Thanks Markmon!

I believe it may be all as sometimes my Getaway has a similar problem if volume too high. Game has rottendog power supply and pinball pro sound upgrade.

Regarding my experience with RD I had a similar Sound issue using RottenDog power supply in my DE Simpsons when I un hooked the back box speakers it went away (of course these were stock speakers). Believe it or not the sound was good enough thru the cabinet speaker . I eventually repaired the OEM board and tucked away the rottendog as a spare and never pursued the issue any further. Last spring my flipper board went out on my GNR right before a family reunion and I didn't have time to fix it so I ordered a RD replacement and had it overnighted ... it worked about a week and started blowing fuses. Contacted Jim at Rottendog and he asked me to send him the board. I got it back a couple weeks later and he had repaired the issue no questions asked. So my customer service experience with them has been good. I went ahead and fixed the OEM flipper board but I switched them out for about a month and had no issues ,,,, again tucked the RD board away as a spare just in case

I am bringing back an old thread to update it. The Rottendog is shipped using regulated 12v. Not sure why but all you have to do is swap the jumpers on RS1 and RS2 to change from regulated to unregulated. The schematic shows this. I believe the reason Rottendog felt the need to regulate the 12v was to stop sound interference with the sound board.

image_(resized).png

Was any of this corrected in the 005 version of the board?

I had a similar issue with an X-Pin Data East PSU. The regulated +12v supply is weak and Brett suggested bypassing it. Was causing sound amps to drop out. Removed U3 and jumped the traces, now getting +14v unloaded which seems normal.

The newer 005 Rottendog is unregulated. So as long as you have a stock pin the 005 is good. In my case I am using a Pinsound board and the Rottendog is too anemic to power it. Even unregulated the 12v on the Rottendog barely pushed 11.6v-12v.

There may be components under-rated/over-taxed for the purpose they are serving on those boards.