Battlezone Green Dot Question

Walkamo

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Hi,

I have a Battlezone that plays blind, actually the screen has a single green dot in the middle.

I just recapped the chassis, however it did not fix it.

I just noticed that the wiring harness for the bottom PCB has been modified.. I have attached a picture below. Does anyone know why this would have been done?

Thanks,

Chris
 

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Looks like they have hard wired +5vdc directly to the board. Most times when this is done, it is to correct for failing split pins in the edge connector or burnt up fingers on the board edge itself.

Green Dot.... make, model and revision of monitor?
 
I'll bet R29 or R30 on the ARII are toast.

Does the LED on the Battlezone boards light up. Can you play it?
 
Looks like they have hard wired +5vdc directly to the board. Most times when this is done, it is to correct for failing split pins in the edge connector or burnt up fingers on the board edge itself.

Green Dot.... make, model and revision of monitor?

The model number is 19KV2000 WG....

Thanks,

Chris
 
I'll bet R29 or R30 on the ARII are toast.

Does the LED on the Battlezone boards light up. Can you play it?

Yep, I can play it, I just cannot see anything....

I bought a rebuilt ARII board and replaced the Big Blue Cap when I first got it (Dead when I got it, those replacements now have it playing blind..).

Is there an easy way for me to check to see if the XY board is outputting anything?

Thanks,

Chris
 
Ok,

So with the help of Dokert, I replaced R100 and R101 with heavy gauge wire. Now I have a dot with a horizontal line which you can see is the game...

Now I just need to know how to gain the vertical picture....

Any help?

Thanks,

Chris
 
Ok,

So with the help of Dokert, I replaced R100 and R101 with heavy gauge wire. Now I have a dot with a horizontal line which you can see is the game...

Now I just need to know how to gain the vertical picture....

Any help?

Thanks,

Chris

Check the wires going to the can transistors on the frame. I had one of mine come loose and I didn't notice it, did the same... quickest and easiest check I can think of.
 
The OP was able to get a full sized picture back by reflowing the solder on all of the headers on the deflection board.
 
Yep,

Have a full picture now (not centered or sized right), however I have to turn the brightness all the way up in order to see a picture. The green dot is very bright in this scenario. and even the smallest turn of the brightness knob everything but the dot disappears.

Also, when I try and enter test mode I get get 9 short low tone beeps and 1 higher pitched longer beep, which the manual states is a ram failure of D1...

Thanks to everyone who is helping.

Chris
 
Always feels nice to be way off the mark every chance possible... but I was right about the o-scope thing, I'm keeping that one.
 
Have a full picture now (not centered or sized right), however I have to turn the brightness all the way up in order to see a picture. The green dot is very bright in this scenario. and even the smallest turn of the brightness knob everything but the dot disappears.

Almost sounds like you are overdriving the spot killer circuit.
 
I had a similar problem with my BZ. Very dim picture, and increasing the brightness caused the dot in the middle to show up.

Put my Sencore CR70 on it and showed almost zero emission and cutoff couldn't be set. Tried restoring a couple of times, but couldn't bring much improvement. The tube was simply worn out (and burn-in was very bad).

Bought a replacement CRT from Video Display Corp and installed it, and the picture is fantastic now.
 
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