(Topic ID: 288267)

Data East MPU issues

By Zeegske

3 years ago



Topic Stats

You

Linked Games

You're currently viewing posts by Pinsider Robotworkshop.
Click here to go back to viewing the entire thread.

#3 3 years ago

I fixed a Data East board in similar condition. Check the reset line! It can be damaged and open due to corrosion. I had a problem where the MPU would reset and boot but the RESET never made it to the PIA chips to reset them and it had issues configuring them. Check continuity on the reset to each of the chips it is supposed to reset.

2 months later
#5 2 years ago
Quoted from Modlite_Rain:

I have a Frankenstein MPU board that had corrosion on it. I did my best to clean is off and try to make sure all the line for the chip below the batteries work connected. When I power on the machine there is audio for “Frankenstein” and the GI lights come on but there is no display or attract light on the playfield.
Any help would be appreciated.

Did you do anything besides cleaning the corrosion? Pictures would help.

Typically you end up replacing the CPU socket (sometimes CPU chip), crystal oscillator, some sockets for the ROM and RAM, and an important step is fixing any circuit board trances that have been eaten away by corrosion and are now open. I tyipcally find a few of those on every board with battery damage I've had to fix. One of those is a reset line. If it is open the board can still boot but may not reset all the PIA chips. Ran into that once before myself.

When there is battery damage you really need to strip off a lot of components in order to find the rest of the damage then build it back up.

Promoted items from the Pinside Marketplace
$ 54.99
Cabinet - Shooter Rods
Lighted Pinball Mods
Shooter rods
3,750 (OBO)
Machine - For Sale
Richmond, VA
$ 27.95
Eproms
Pinballrom
Eproms
$ 60.00
Playfield - Toys/Add-ons
Maverick Reproductions
Toys/Add-ons
From: $ 35.00
Cabinet - Armor And Blades
arcade-cabinets.com
Armor and blades

You're currently viewing posts by Pinsider Robotworkshop.
Click here to go back to viewing the entire thread.

Reply

Wanna join the discussion? Please sign in to reply to this topic.

Hey there! Welcome to Pinside!

Donate to Pinside

Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!


This page was printed from https://pinside.com/pinball/forum/topic/data-east-mpu-issues?tu=Robotworkshop and we tried optimising it for printing. Some page elements may have been deliberately hidden.

Scan the QR code on the left to jump to the URL this document was printed from.