Defender Pinout

rikitheshadow

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Donor 2011
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Ok, I was working with my client to get his Defender board set fixed. First of all his cabinet's wiring kept throwing breakers when plugged in, the monitor was dead, and of course nothing from the game....not even a peep.

So I offered to fix up his cabinet/monitor and we could ship out the Defender board to a guy named David Haney in Austin, TX to get the board set fixed. Figured since he also offered a warranty and the repairs would be $125 max that it would be a good value.

Took 3 weeks total, but the man's machine has been broken for a year or more.

Well David got it fixed for $100, I got a drop in replacement Wells Gardner K4600 chassis, and I re-did all the cabinet wiring so he could use the power switch and it didn't throw breakers. BUT, when I got all of it hooked up and finally running....the game didn't power on, no audio cue either. So needless to say I was frustrated spending the 3 hours fixing the cabinet and having my customer wait 3 weeks for nothing. Almost got mad at David, but we talked over the phone to verify a few things.....

Now I had checked the cabinet's power supply voltage, a switching power supply (not linear), all the voltages were good.....maybe a voltage drop on the board itself. So I took the board home and made a make shift test bed for it with only the CPU/Video and ROM board. I still get nothing with even pumping the voltage high enough to have it 5.15 VDC around the chips and not the harness connector.

Grabbed the Isopropyl Alcohol, pulled a few of the chips off the CPU/Video board and cleaned them, majority of which were the TTL chips above the battery area. Pulled out the 6809 and cleaned everyone of the feet with some light abrasion and then cleaned the socket. Cleaned any corrosion on the board, not from a battery, but just any old pcb stuffs. Hooked it back up and at least I get a Williams logo popping in and out but disappearing after 2 secs. Given this was on my CGA to VGA converter using the sync pin 6 on the CPU/Video board........so I decided to use my big 27" D9200 and nothing would happen.
NOW the manual and schematics say that pin 7 and 8 are not used......I could get clear picture off Pin 8 for the sync.............is this board a different version? I'm a little confused.
 
The video pinout is R-G-B-E-v-h-c, where
R= Red
G= Green
B= Blue
E= video ground
v= vertical sync
h= horizontal sync
c= composite sync

The composite sync is a positive composite sync and some monitors want a JAMMA style negative sync.

When you have it hooked up are you seeing the rug test and then the attract mode screen going back to the rug test? Or is the vide flickering?

As a side note, you should always the voltages on the MPU board at the corners of the RAM chips. That will verify that the correct voltages are present.

ken
 
The video pinout is R-G-B-E-v-h-c, where
R= Red
G= Green
B= Blue
E= video ground
v= vertical sync
h= horizontal sync
c= composite sync

The composite sync is a positive composite sync and some monitors want a JAMMA style negative sync.

When you have it hooked up are you seeing the rug test and then the attract mode screen going back to the rug test? Or is the vide flickering?

As a side note, you should always the voltages on the MPU board at the corners of the RAM chips. That will verify that the correct voltages are present.

ken

Using the horizontal sync I get video like for a few seconds, and it's jumpy and breaking up all over the place, but I saw the Williams name appear so I know it was just my sync or either my converter then. So i got my D9200 tri sync out and used the composite sync i suppose because the horizontal sync pin would do nothing with the monitor.
 
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