My display voltages at my Rottendog power supply are 80 & 60 rather than 60 & 42. All other voltages are correct. The displays burn bright. Is this within range or am I setting up fro further failure? Can you help me? New to System 80 and Gottlieb.

Also, lower playfield flippers do not work. What am I missing? All other solenoids work fine?

Appreciate any help you can offer.

This is a Haunted House machine.

I do have schematics. I am going to test the lower flippers in a game simulation and see if they work when the ball enters that playfield. Will also check the high voltage regulator on the power supply. Will let you know. Thanks for the help guys.

Hello, The lower flippers do work. Thanks for the information on that relay. I have ordered a LM 317 - TO 220 high voltage regulator for the power supply. What caused this was a rookie mistake of unplugging the display connectors J2 & J3 while game was still on. Also cost me a set of 6118A drivers but I am lucky it was just that at display #1.

If I may tax your knowledge further..please....the game now works but there is a serious loud hum over the sound. So much so that I cannot check the sound further but I can faintly hear all of the sounds in the background. I have tested the components on the sound power supply (A7) and found only the CR2 Zener Diode 12V to be suspect. Also, the -12v dc is reading at -2.5vdc. Could this diode be the issue?

Don't want to press my system 80 newbie luch but it appears with a NiWumpf driver board and the Rottendog power supply, none of the ground mods have been completed. Should I go ahead and do these mods?

I really appreciate any help you can give me. I've always been a Williams/Bally guy but I love these system 80 pins from Gottlieb. Thanks Much!!!

Thanks for the information. I have heard that the pots can be an issue so I will look into that. Also, I will re-read the many ground repair guides. Can you tell me who did the repair to your sound board? Just in case I do need to send this one out? I am limited in my board repair knowledge but am a great and careful solderer. (sp?) I can do bridge rectifiers, some transistors and resistors but I am honestly not nearly as educated in electronics as so many on this forum. I can only do what I do from the many repair guides available. So thankful for them all!

Thanks All - Update...Thanks G-P-E! New LM317T TO-220 installed and the display voltages are back to normal! Now, I am waiting for the CR2 zener diode to install in my sound power supply to see if I can further my sound issue repair. Also, I have used Coin Op Cauldron in the past and they do excellent work. Thanks guys for the reminder on that one. This game is reminding me of the patience I once had, and need, for pin repair. Appreciate the help.

Thanks for the very good advice. I just found out last night that I believe I blew the SN7404N chips at z17, z24 & z26 (I believe) on my CPU because my #1 & #3 displays are missing digits. A hard lesson.

Does anyone have a manual for the ni-wumpf system 80 driver board? I have leds lit at E2, E3, E7, E4 & E10 but I do not know which components these leds are referring to? Any help would be greatly appreciated.

Thank You alexanr1, yes...makes sense. BTW....just to update any who are reading, I replaced the CR2 Zener Diode on the sound power supply board and reseated the chips just to be safe. The sound works!!! Now, my only issues left are the LEDs on the driver board that I will track down and the SN7404N ics that I blew with my display connector incident. I will get those installed later this week. I will then tackle the ground mods and shop this game. I am now a Gottlieb system 80 fan. This game is very cool!

Update: I replaced the SN7404N ics at Z17, Z24 & Z26 and all digits on displays 1 & 3 work great. Displays 2 & 4 flicker a bit at digits 2 & 5 so I am thinking maybe a connector issue? Or perhaps the Z19, Z21 & Z23 ics. We'll see. I do need to do the ground mods but need to read up more on these. I have a ni-wumpf driver, a Rottendog power supply and original control and sound boards. Any suggestions on how the ground mods may differ for this setup would be appreciated. I can't wait to get this machine shopped and cleaned up. The HH machine is really a keeper for my collection.

Oh yeh...I spoke via e-mail with Dave at ni-wumpf and he told me that the leds were all tied to the coin mechs and there is no need to worry about them. The game now functions perfectly.....well.....for now...

I will try to take better pics in the next few days but here is the HH I am restoring, along with a pic of the new pop bumper assemblies, PBDBs I will be installing, rubber kit and other accessories. This is a keeper and I enjoy the "tear down" shop and re-assembly. Also attached is some pics of my other games. I re-read all the ground mod manuals and I am ready to tackle those before taking the machine apart. Sorry, it's night time here and photos are without natural daylight.

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_{Post edited by hapsreplays : Duplicate pictures}

Some repeats. I'm new at this. Appreciate the help and encouragement!

One of the backbox.

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Yes, I am glad to have this game. I'll post pics when I am done shopping it out.

Hello Again,

I am knee deep in my HH restoration. I've totally shopped, repaired and rebuilt the attic and basement playfields including total rebuild and replacement of pop bumpers, flippers and new coil sleeves on all coils. I always take pictures of the playfields and draw diagrams before taking the playfields down, tumbling all the posts and doing the rebuild. Somewhere along the line, my drawing of the attic is lost. My pics were not good enough. I can't figure out where the wire guide that is about six inched long, I believe was on the left side of the attic, goes. Can anyone provide a close up pic of the HH attic playfield showing me where this wire guide goes and what posts it attaches to? I appreciate the help.

Thanks Much Steve! I will use these pics for further reference. I ought to post more often. After I wrote this plea for help, my wife found my drawing on the back of a Mouser receipt. She so eloquently suggested I keep all of my drawings in a notebook form now on. She's right. Anyway, the wire form actually goes on the right side of the attic playfield. I will post pics of the restore soon. Thanks Again!