NOTE: We have also owned a Battlezone Cabaret in the past.
Saw an ad on Craigslist for five free games so I replied ASAP. The guy was clearing out some room in his garage and liked my email because it was short and to the point. Basically all I said is "I have a truck and can pick them up tonight." The five games included 2-Battlezones, 2-Omega Races, and a Space Panic.
This Battlezone was complete, but pretty dirty from sitting in storage for years. At one point it suffered some slight water damage but it isn't too bad.
The sideart was originally very dirty and had some oil on it. Magic Erasers once again proved to be magic and after 5 or 6 hours of cleaning the art looks great now.
The control panel is in decent condition, there is some rust and some of the paint has worn, but overall it's in good shape... especially considering the price!
Over the past few months I fixed the PCB and the game was working... but the HV diode died recently and after replacing it I'm having problems with the retrace lines not being blanked. It's a problem in the monitor because the game PCBs test good in our cabaret. Luckily the person giving away the games also had a couple extra monitors...
Hopefully I'll get the game working soon because I'm addicted!
So... I started working on the real problem tonight... the PCB. The Z-output is doing some funny things. Sometimes when you turn the game on it's around .5v while other times it's around 1.5v... it's pretty random.
I started tracing back from the edge connector and it seems like the F8 74LS175 is acting flaky. The inputs seem to be correct but the outputs are getting stuck high one time and low the next. There is a 74LS399 at H8 that could be back feeding I guess so I'm going to replace that also. I just need to get both chips tomorrow at the local electronics store.
I also found the POKEY had 4 or 5 cracked legs during testing after replacing that 399... I cleaned the legs a while ago since they were so dirty and never noticed the "loose legs". After swapping in a good POKEY the BZ has been perking away for hours.
The kit was complete but it was in pretty rough condition and the marquee was totally unusable since it was heavily scratched. Luckily I found another marquee at QuarterArcade.com.
I have to say, after getting the games arranged, I'm thrilled we got the chance to obtain these two Battlezones.
Right after I received this one back I sent him my spare set that had issues also. And again, I received back a working board!
I ended up selling the periscope Battlezone last month since we are out of room in the basement. The non-periscope Battlezone is next to Red Baron and I just love the way these two look together. I still do have the periscope in case we want to play it that way.
(INSERT PICTURE OF GAME FRONT)
When I picked the game up it was complete but non-working. The overall condition of the game was decent, but unfortunately it was stored in a damp basement. The metal control panel had a bunch of surface rust but the cabinet itself did not swell! Thank the maker!
(INSERT PICTURE OF RUSTED CONTROL PANEL)
The first thing I did was remove all the electronics and clean them. Next up was to rebuild both the power supply and monitor. I know some folks don't see the need to replace all the caps but I like working on this stuff so it's not a big deal to me.
(INSERT PICTURE OF REBUILT PCBS ON COUNTERTOP)
After reassembling the game I was greeted to a constantly resetting PCB with no picture on the display. Knowing these games suffer from poor sockets and sometimes bitrot in their masked ROMs I brought out the high score save kit. LOL. I did replace the processor and vector EPROM sockets just for good measure. The result, nothing on the screen and a resetting PCB. Ugh...
At this point real life took over and my urge to work on anything arcade related dried up. The game ended up sitting here for about a year.
In early 2020 I decided to work on it again. No reason really except I wanted to play Battlezone.
So first thing first, the power supply. Somehow I totally neglected to measure the power supply output once I reinstalled it. The PCB was getting 5.2v at the test points and once I turned it down to ~5.0v I got a picture during reset and the reset was different.
Here's the funny part, I also discovered the amplifier for the cabinet speaker was not working. And since I had the periscope part of the game off I could not hear the beeping that was telling me one of the RAM were bad. Oh good Lord! Once I fixed the first RAM I had another RAM testing bad. Replacing the second bad RAM lead to a test screen and no beeps! Yay!
Thinking I had won, I started what I thought would be my first game of Battlezone in years. Nope. Corrupt vectors now. Ahhhhhhh!!!
Having had a bunch of Battlezones in the past the issue looked familiar. I went through my notes and saw something similar was caused by a defective shift register. Going with that I piggybacked a few chips and got lucky in finding a bad 74LS194. Replaced it and... I finally got to play a game!!! Woo-hoo!
(INSERT PICTURE OF WORKING GAME!)
Now to tackle the control panel rust. For this, I have to thank my good friend Anthony(resipsa on various forums)! He sent me a perfect condition reproduction after he heard about this game. I can't thank him enough!
(INSERT PICTURE OF AWESOME CONTROL PANEL!)
Battlezone is truly a classic!
(AS OF: 03-03-2013)
Page created: 01-21-2010
Last update: 03-03-2013