The electronics
Posted: 30 August 2011 Filed under: Electronics, Pinball Champ '82 | Tags: cpu, electronics, pinball, power supply, sound, zaccaria Leave a comment »
Before switching on the pinball machine for the first time, I checked the input voltage settings on the main transformer and the fuses there and I checked the fuses on the power supply board. I needed to replace one fuse, it looked good, but when I measured it with my multimeter it failed the test.
Then I finally switched the machine on. Nothing happened. Then I plugged in the power cord and tried again… Lights came on, displays flickered at random and then went out. That was it.
Clearly things are not working as they should, time for some troubleshooting.
So where to start? With the power supply ofcourse!
The first thing I noticed was no -5VDC due to a defective 7905. Off to the store I went and now the power supply has a brand new 7905.
The new 7905
Unfortunately after fixing the -5VDC I tested again and the 170VDC was gone. After a few measurements I noticed that TR3 (2N3440) had come loose from the PCB. Shabby soldering? That knocked out R6 (47 Ohm 3W) as well. Off to the shop I went again. I had to use a 5W resistor, but that’s not a problem.
The new R6 (47 Ohm 5W)
The new TR3 (2N3440)
I reconnected the power supply board into the pinball machine and tried again. Except for a pop from the loudspeaker when switching on nothing changed. I disconnected everything except the sound board and after pressing the test button on it, the LED blinked 5 times and the pinball machine started talking to me 🙂
The Sound Test video, best viewed with VLC media player (see my links section).
I disconnected the sound board and reattached the CPU board. It would not boot. After some reading on zaccaria-pinball.com (see my links section) I checked the Power Fail signal coming from the power supply board and yes, it was the wrong signal 🙁
So I did what all good technicians do and disconnected the lead from the connector. Problem solved. I promise to get the power fail circuit fixed later on. I promise!
I promise to check this power fail circuit later on...
The power fail workaround
After retrying to boot the CPU, it actually did… sort of. I starts booting but then keeps hanging somewhere. When measuring the test points, I don’t get the pulse signal on TP6. Further testing and digging in the schematics is necessary. To be continued…
So what did I buy?
Posted: 30 August 2011 Filed under: General, Pinball Champ '82 | Tags: berfore, condition, pinball, zaccaria Leave a comment »
I bought a Pinball Champ ’82. This machine was built by Zaccaria in Bolognia, Italy in 1982.
Some pictures:
My Zaccaria Pinball Champ '82
The backglass in relatively good condition
The backglass is in relatively good condition. There is some wear above the 2nd and 3rd player displays and the lift trim is rusted.
The playfield: dirty but mostly complete
The playfield needs a thourough clean, all rubbers need replacing, burnt out lamps need replacing and some screws are missing, but all plastics are intact!
The "CHAMP" droptargets with a missing "H"
This is my biggest worry… How am I going to replace that missing “H” drop target? I have no idea yet.
The cabinet door is a mess
The door is a mess, the cable tree inside has been cut, the lock has been drilled out, the door is deformed and doesn’t close or open easily, the red Zaccaria door sticker is missing and don’t get me started on the coin slots…
The identification sticker
The serial number of the machine. I haven’t registered it yet on the Internet pinball serial number database, I’ll do that when it’s restored.
Welcome to my pinball restoration blog
Posted: 30 August 2011 Filed under: General, Pinball Champ '82 | Tags: buy, pinball, zaccaria Leave a comment »
So why this blog? Because I’m restoring a pinball machine? Duh…
I was walking down my street about a month ago and noticed a sign on a window saying “everything for sale” and a mobile phone number. I looked in and saw this:
OMG it's a pinball machine!
So I wrote down the mobile number and called the next day. Yes, it is still for sale; yes, I can come have a look; yes, you can take it off my hands for 75€…
Two days later it was delivered to my garage and now I’m restoring it.
Flippers.be
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