Missile Command monitor problems......

[Muerto]

Im about to explode, I have a working MC PCB, with a working AR2, and a newly refurbished G07 chassis, and still it takes the best of me, what the hell is my next move??
I can have a stable picture, but it seems like i have it spread out 5 times or so...




The dials on the chassis..

[level42]

Looks like sync problems.

[Muerto]

Looks like sync problems.

Where is the potentiometer for SYNC? 

[Etienne MacGyver]

is the board working on another monitor ?
is another board working on this monitor ?

Sync problems are not always a pot problem or a monitor problem, it could also be a board issue.

i would try the above methods to isolate the source of your problem

[level42]

Yup, good start.

Hard to see from the pictures but it looks like the picture is "shifting left and right" ?

Following the famous G07 flow chart you should check X302, X306 and maybe have to replace IC501.

I'm not going to tell you where the pots are, you're a big boy, you can find manuals and read them  


(Or look at the names of the pots on the PCB.......   )

Maybe you should look for something that will HOLD the picture still..........

[Etienne MacGyver]

Also, if it turns out to be a monitor problem, you state it has a refurbished chassis, but those pots look very old.

I dont think they make these kind of pots anymore.



It could very well be that the pots need replacements by the modern version:



now, i am not saying that is the source of your problem.

first narrow it down from where the problem is comming and focus on that.

[Muerto]

Yup, good start.

Hard to see from the pictures but it looks like the picture is "shifting left and right" ?

Following the famous G07 flow chart you should check X302, X306 and maybe have to replace IC501.

I'm not going to tell you where the pots are, you're a big boy, you can find manuals and read them  


(Or look at the names of the pots on the PCB.......   )

Maybe you should look for something that will HOLD the picture still..........

Yeah yeah, mister smarty pants - I have turned any pod that is turnable on the chassis, and nothing seems to work..

Also, if it turns out to be a monitor problem, you state it has a refurbished chassis, but those pots look very old.

I dont think they make these kind of pots anymore.



It could very well be that the pots need replacements by the modern version:



now, i am not saying that is the source of your problem.

first narrow it down from where the problem is comming and focus on that.

When you do/order a G07 rebuild kit, you dont get the pots, only resistors etc....

[Etienne MacGyver]

and thats why they are the old ones, and may be rotten to the bone  

really, try the earlier proposed methods to narrow the problem down to one of the two (board or monitor)

the pots may very well also be 100% fine 

[Etienne MacGyver]

Just took a look at the pinout of missile command and the manual of the G07 monitor.

It looks like both have separate sync, but googling a bit more, i stumbled upon this :

beside that, what happens when you combine the sync wires ?

[Muerto]

Just took a look at the pinout of missile command and the manual of the G07 monitor.

It looks like both have separate sync, but googling a bit more, i stumbled upon this :

beside that, what happens when you combine the sync wires ?

Ahhhh, maby i should give it a try - a guy on KLOV mentioned the same.... THANKS!!!!

[Muerto]

Nope  didnt help, still the same picture as before... even with both SYNC wires OFF the board; still the same picture as before..... Yep - I definitely have a SYNC problem.... maby on the PCB??

-EDIT-
Just tried with anothe MC PCB, though it didnt work, itdisplayed a red screen that behaved the same way as the working one....
Tomorrow when i get home from work ill re-solder the whole chassis - just to be sure!

[Superully]

you said you had a working pcb in your first sentence, michael. has it been tested anywhere else and was working then? or are you just ASSUMING it is working because you have a picture?

[Muerto]

you said you had a working pcb in your first sentence, michael. has it been tested anywhere else and was working then? or are you just ASSUMING it is working because you have a picture?

I can see the picture - though spread out 5 times on the screen, and if i hit the start button i can play the game... - I wish you lived closer, then i would stop by so i could test them...

[Etienne MacGyver]

what you mean by "even with both SYNC wires OFF the board" ?

both wires disconnected (yellow and white) ?
if they are disconnected, it is normal that its out of sync, since there is no sync signal entering the chassis.

if its connected and does the same, then it could be that your board is not sending a sync signal.

another point is that you say that the broken board with the red image does the same, so or you have two boards with a sync issue or  you have 2 boards without a sync issue and the problem is in your monitor

you also stated this earlier : "When you do/order a G07 rebuild kit, you dont get the pots, only resistors etc...." , which makes me asking you this question, did you do the rebuild, and did you have the issue before the rebuild ?

what happens when you hook up that monitor to a "know" working board ?
(in other words, try to connect it to a working game you have  )

do you have another game that uses also a G7 so a easy testswap can be made ?

[level42]

Where is the potentiometer for SYNC? 

You _did_ ask this question my friend !

By the way, how are Danish summers ? We might be heading your direction this year