On those big black heat sinks, the drivers are all bad. On a conventional Williams WPC power driver board, those drivers are TRIACS. On a Rottendog, they did things differently..... they used special voltage regulators that looked like triacs. We had one Rottendog WPC power driver board where all of the GI drivers were bad and only outputting 2 volts to the bulbs.

I remember we had to get the exact numbers off of the bad parts. We had to get them from out of the country because nobody in the USA had them at the time.

Get the fuse clips from Great Plains Electronics.

https://www.greatplainselectronics.com/products.asp?cat=32

They stock regular and high current fuse clips.

Ours was a defective board right out of the box (with a 2020 date). I'm assuming they had bad batches of components and were not testing every board they made.

I just had a look at the board I fixed. It was a Rottendog "WDB95" which is for WPC95 machines. This has three black heat sinks for the general illumination circuits.

The special drivers are type LM1085-IT-5.0 and have an associated 2N5401 transistor with each one on the board.

On Rottendog power driver boards for WPC89 systems, those use five type MAC210A8G drivers and an associated 2N5401 transistor for the general illumination.

LM1085 is what is actually installed on the WDB95 board when we unboxed it and then we put it in a machine.

I could get a picture, but not today.

The MAC210A8G which was installed on a WPC89 power driver board is a device number I am unfamiliar with. I've never seen or heard of that number before. Don't know what it is.

When we first plugged in that Rottendog WDB95 after unboxing it, we smelled something hot! That's when we noticed part of general illumination was out. We then installed a rebuilt genuine Williams driver board and everything was fine (lights all working and no more hot smell). You think someone at Rottendog installed the wrong parts?

The LM1085 installed by Rottendog has only three leads.

It's been a year since we bought that Rottendog board.

We talk to Victor Tan all the time. He comes to visit us every so often and try out boards in our machines. He's located about an hour away from us.
EDIT: Victor was just here for a couple of hours today.

Here are pictures of that WDB95 board with the LM1085 IT-5.0 installed for the general illumination circuit. Notice they are attached to the heat sinks with pop rivets!
WDB95-1 (resized).JPGWDB95-2 (resized).JPGWDB95-3 (resized).JPGWDB95-4 (resized).JPG

You can use either of these:

MAC210A8G (Digikey has these)
https://www.digikey.com/en/products/detail/littelfuse-inc/MAC210A8G/918546?s=N4IgTCBcDaILIEEDCYCMAGAhgDgOYgF0BfIA

BT138-600E (Digikey also stocks this and at a good price)
https://www.digikey.com/en/products/detail/ween-semiconductors/BT138-600E-127/1155157

Yes, that appears to be the only incorrect parts that were installed on the WDB95 board. The associated 2N5401 transistors might have been damaged, but I don't think so. Just the three black heat sinks grouped together had the incorrect parts.

The big black heat sink in the upper left all by itself is the actual 5 volt regulator power supply. Leave that one alone.