Email them directly … they’ll help you out.

[email protected]

rd

I have no experience with their cpu boards, but we *had* one of the Homepin opto control boards in a Doctor Who which was causing one of the upkickers to fire continuously. We pulled that board out and replaced it with one of the "DumbAss" opto control boards and the problem was solved. Once I got the Homepin board over to the workbench, I started to inspect it. I was surprised to see rosin flux all over it like the board never got washed at the factory. I also found many bad solder joints at all of the connectors as well as at all of the high wattage resistors. This board had not been worked on before. So I scrubbed all of the old rosin flux off with 99% Isopropyl alcohol and a toothbrush. That cleaned it up nicely. That is when I spotted all the bad solder joints once the rosin was cleaned off. I don't know how old this particular board is, but I don't like the poor quality control this board had.

what made you rule out the driver board and ribbon cables as the cause of this data quirk?

There was a bad batch of those affected boards about 4 years ago.. Its got nothing to do with the current cpu's

dips are country settings like any other wpc mpu. they should be the same

as of lunchtime(ish) when i checked, your email had not come to homepin for response. forward it to me if you like ill make sure he gets it. (my username here)at legbolt.com (im the media mangler for the place you bought it and the place who made it so im in a good spot to help you make sure it will get seen.

instinct and experience says its not the mpu but changing ribbons as well might make it go away now. lets see

sorry i cant unwrap that mess.

your email wont be answered until you send it properly. its still not been recieved. try again as the last one never arrived.

maybe you saved it as a draft instead or something?

the mpu is basically the original wpc layout with an nvram .. i really doubt your problem is there. As i said earlier ribbons or an issue on the driver board most likely

I also noticed some strange behavior with Doctor Who.

I have 2 Doctor Who machines, one with original Williams MPU, one with Homepin

During Video Mode when you collect the extra ball the Knocker will fire when you collect the extra ball on the homepin and not with the original board..

Go figure.

Are both machines running the same rom version?

Maybe swap the rom chips between machines, and see if one rom fires the coil and the other doesn’t …

Be interesting to see!

rd

Yeah same rom chips from what I can tell! I don't really want to swap them, I just had the Bally/Williams MPU out to repair a faulty diode!

Fair enough too.

The DMD should show the version number on the screen when you fire up the pin. Evidently two factory versions, L1 and L2. And maybe other versions floating around out there too.

rd

They both boot up with L2

Cool! Weird they are different.

Enjoy your bonus knocker sound.

rd

Do you have a Doctor Who rotordave ? Does it have the knock during Video mode?

It also does it during W-H-O Extra Ball

Its actually quite distracting during Video mode so I doubt its normal

I have the extra balls turned off on all my pins, so unfortunately I couldn’t tell you …

I’m sure someone can tell us …

rd

Restore both to factory settings. It is more than likely a difference in the settings. You can turn features like this on and off.

Its not a setting - they are both on factory

Are the country code DIP switch settings identical? Some countries have the knocker disabled because electromechanical coin counter is connected instead of knocker. Set "coin meter units" in pricing adjustments to OFF.

Nice tips!

rd

Turns out you are a Genius. I dont think its because it disables the knocker - there is a programmed in game feature to allow it only in video mode using some combination when all the DIP switches are set to OFF.

My Original MPU (Hard Soldered DIPs) No Knock
IMG_1126 (resized).jpg

Homepin MPU Knocks
IMG_1128 (resized).jpg

Homepin MPU with the same DIPs set to ON No Knock!
IMG_1127 (resized).jpg

Dear all,

I purchased a sttng pinball. Initially all was ok. Some days after I start having problems of random resets ( multiball and others...). We solved these problems ( cleaning and fixing optos nad various). It has some corrosion and we remove it and repair the parts with this problem. During some days, it looks that the machine was running normally.  After this, one day the machine start for a moment and after die except some GI lamps, with the D19,D20 & D21 leds of the cpu board "on" continously form the power on. The first times that the machine do this, I turn off the power and turn on some minutes later . The machine was ok! during 1 or 2 minutes and after the same problem appears. Finally and some operations of turn off and on after, the machine  directly did not work an have the 3 leds continously "on" from the begining. We extracted the CPU board and only with the power conector connected to it the problem continues. Finally and in a sucessive way, we changed the components of the blanking circuit, the RAM, ROM, ASIC, CPU and other components including the crystals. The same problem always continue. We can not do that any of the leds will be in "off"

Have you any previous experience like this or any idea? We have not more options to execute and we will be very grateful if somebody can help us before that we  decide to purchase a new board. Internally, we are sure that this problem may have a simple cause ( all the new/used component changed in this board are in a good state, because we tested them in other boards after use in this problematic board), but we can not fix it...

Waiting your comments. Thanks a lot for your attention