WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

i just noticed something in your tube foto - where the hell is the convergence ring assembly?
did you strip it off or was it missing to begin with?

From what I read, the d9200 does not have this...

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

btw, you shouldnt be asking advice while buying things.
it could turn out that you have been sold a frankenstein monitor assembled from fucked parts.
makes me wonder if the rest of the machine works - if i was you i would hook a pc monitor to the video socket on the end of the Naomi unit and change dipswitch1 to "off" to select VGA

The Machine works fine, just playing blind. I hooked up a monitor when I got it home, plays great. I really wasnt worried much if it did or not though, I will be stripping all the boards and GDrom out of it. The only thing I am leaving is the Monitor (if i can get it working), and the audio amp. (and of course lighting coin mech etc...) I am not sure what you mean by "I shouldn't be asking for advice while buying things?" I asked because I was not 100% sure. After talking to the tech he assured me that their are two assembly's for the d9200, but either will work with my tube. Just trying to figure it all out. My main interest here was in the excellent cab to modify. I only paid $120 U.S. , and am very happy with it. I was ready to drop in a LCD/LED monitor. If I get her working that will be a bonus. The working Sega Naomi Main board, GD-ROM, IOboard, PS, and audio amp etc Is well over worth more than I paid.....

[stj]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

btw, you shouldnt be asking advice while buying things.
it could turn out that you have been sold a frankenstein monitor assembled from fucked parts.
makes me wonder if the rest of the machine works - if i was you i would hook a pc monitor to the video socket on the end of the Naomi unit and change dipswitch1 to "off" to select VGA

[stj]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

i just noticed something in your tube foto - where the hell is the convergence ring assembly?
did you strip it off or was it missing to begin with?

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

you have no idea if that's where the problem is.
there is more than 50% chance that your neckboard is fine - and a good chance his is bad. (or he would be selling a complete chassis with tube)

that's not NOS anyway, it's a pull from a used monitor - fucker thinks we cant tell.
see the black sealant on the neckboard? that was to hold it on the tube!
and they did not cost that much new from WG last time i looked.

Yeah, he was selling NOS he claimed on ebay. He directed me to buy it from his site. He sounded a little squirrely after our last chat.
I ended up buying from a guy named Stan doing repair outta South Carolina. His listing is for repair, but he is sending me a whole new complete chassis, after the repair I am going to send him my old chassis.
Here is his listing: http://www.ebay.com/itm/WELLS-GARDNE.../331961558856?

[stj]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

you have no idea if that's where the problem is.
there is more than 50% chance that your neckboard is fine - and a good chance his is bad. (or he would be selling a complete chassis with tube)

that's not NOS anyway, it's a pull from a used monitor - fucker thinks we cant tell.
see the black sealant on the neckboard? that was to hold it on the tube!
and they did not cost that much new from WG last time i looked.

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

lets ignore the heating resistor for a while and try to get the neck heater working.
leave the resistor off he board,
re-assemble the thing and see if your getting heater voltage on the neck-socket pins when it's on.

Question, Will this work with my tube/yoke? :
http://www.ebay.com/itm/27-CRT-Wells...3D331932555648

Curious, this guy is going to give me a pretty decent price, and the parts are NOS

[stj]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

lets ignore the heating resistor for a while and try to get the neck heater working.
leave the resistor off he board,
re-assemble the thing and see if your getting heater voltage on the neck-socket pins when it's on.

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

you should see a low resistance between 6 & 7 - that's the heater element!

and check the resistance between ground and pins 21, 24, & 26 on the 28pin chip
ground is on pins 11 & 22

This neck board replacement looks like the same thing: http://forums.arcade-museum.com/show...96#post3431996

He says its for D9200 later model chassis that used flyback 053X0658001. The numbers on mine are 6174Z-6005G ....
It sure looks like one in the same though...

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

have you had a close look at the soldering at that point on the main board?

I do not think this is cause of current issue, just years of heat focused in the area. When this problem is fixed I will tidy up and re-solder for good measure.

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

you should see a low resistance between 6 & 7 - that's the heater element!

and check the resistance between ground and pins 21, 24, & 26 on the 28pin chip
ground is on pins 11 & 22

Checked, All are about 390Ω.... Pins 6&7 on the tube is about 9.63MΩ. What about 3 and 6 @ 1.1 ohm, is that ok?

[stj]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

you should see a low resistance between 6 & 7 - that's the heater element!

and check the resistance between ground and pins 21, 24, & 26 on the 28pin chip
ground is on pins 11 & 22

[vinceroger69]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

have you had a close look at the soldering at that point on the main board?

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

on the back picture of the mainboard theres one joint that looks bad too me ive marked it with a red arrow.

Thanks for pointing that out Vince. I did notice this as well. It matches up with the spot on the metal plate that the boards mounting plate as well. (in attached pic)

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

can you show those pins on the neckboard foto?
i dont know how your numbering them.

Yes, i am sorry. I should have been more specific. I was numbering them facing the tube from left to right. I am attaching a picture of the neck with the numbering, as well as the board.

[stj]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

can you show those pins on the neckboard foto?
i dont know how your numbering them.

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

1-3 is the heater, so that's all good.

check q215, q220, d209 and sg204 < specially this.

I meant to say pins 1&6 are about 1.1 ohm, is this still ok?

I tested all the components you asked, all tested good.

[stj]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

1-3 is the heater, so that's all good.

check q215, q220, d209 and sg204 < specially this.

[proaudiosoft]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

can you meter the pins on the back of the tube,
all combinations.

most will show nothing.
what we are looking for is if the gun related to that resistor is shorted to something else - such as the heater!

I checked. Any pins that show a reading together are in the Mega ohms, accept Pins 1 & 3 together, I get 1.1ohm. is this significant?

[vinceroger69]

Re: WGM2792 Arcade Monitor Resistor Burn Off On Neck Board *Need Help*

on the back picture of the mainboard theres one joint that looks bad too me ive marked it with a red arrow.