In the first post I mentioned the dag was missing from the monitor, so while the tube is out, lets give the monitor some attention…
As you can see in the pic, the “dag”, or basically the ground for the picture tube is gone. Normally this is a bare, braided wire that wraps around the back of the tube and often kept tight using springs.
Thankfully Dags-R-Us was still open, and had the parts I needed in stock! What great service! Anyway I was able to assemble a new dag, and a handy Harbor Freight spring kit had exactly what I needed to attach it. (Did I mention Dags-R-Us looks suspiciously like my garage??)
With the dag fixed, I gave the chassis a look over, and honestly, I see nothing concerning! While getting ready to put the monitor back into the case, I notice a very familiar sticker; Wells-Gardner! A very well known name in the arcade collecting circles; they made a LOT of monitors for the coin op industry (and just about everything else).
With everything looking good, the tube and chassis were carefully lowered into the case and bolted back down. Lookin good!
A couple things I noticed about the monitor; first off it actually runs on 12v dc! It has a plug right off the power supply.
Another thing I noticed was the ribbon cable connector actually passed through to an unused card edge connector. It also has the pinout labeled, which indicates a monochrome RGB-HV video format, very similar to coin op monitors. Finally theres 3 pins marked “BRT”, which are actually the 3 legs of the brightness potentiometer, which connect to the logic board and simply pass through to the ribbon cable.
The missing pin would have been a 12v line, not sure if that would have powered the monitor or vice versa, but its not used here.
I did make sure to give the brightness pot a lil shot of deoxit for good measure, it read good on a meter and had smooth action. It had to go in first before the tube and chassis.
With the monitor reassembled, it was time to move to the logic board. First and foremost – #GetTheDamnBatteriesOut! This battery pack had very minor leakage thankfully, and first order of business was to cut it out, then desolder the legs. We’ll see if I bother to put a new one in. I then cleaned up the area with alcohol, which revealed nearly no damage, truly amazing!
Stay tuned for part III, where we continue to go over the logic board and start cleaning up the obvious.