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

[proaudiosoft]

Hello all. I just Bought a Sega Sports Jam Arcade Machine with the intent on fixing it, and maybe later converting to a mame machine. I have done many in the past The sound is heard, but the monitor does not turn on @ boot. When i took the back monitor cover off the machine I found a white ceramic resistor that was just laying in the metal monitor cover. After inspecting a minute I noticed r242 was missing from the neck board, and a black spot was left behind. My question is: should I just order a replacement resistor, or should I further investigate to find out what caused the resistor to fail (and/or fall off). I am just wondering if someone could point me in the right direction of what to check for? The monitor is a WGM2792-U0TS29K, the neck board is a p858. Resistor is 10w 1.5k . I will attach pic of neck board...   Thank you so much

[proaudiosoft]

Anyone?

[proaudiosoft]

One more thing, someone suggested it fell off because of a cold solder joint. I tested the resistor (pic attached), its reading 1.333K Ohms. Is it within tolerance to reuse?

[proaudiosoft]

 I re-Installed the resistor, still no monitor glow. I am getting a little bit of smoke, like steaming off. It looks to me like its coming from the heatsink I circled in red (attached pic). Any suggestions?

[proaudiosoft]

I checked the transistor that sits on the heatsink, it appears to be ok. Any suggestions on what I should check from here? I would so appreciate it

[ed12]

them out puts = 3 are your r/g/b gun drives

ed

[proaudiosoft]

Could IC201(video amp)cause the tube to not even glow if it failed?

[ed12]

tube glow >neck glow< at the neck orange
is a function of the flyback
if u are referring to the face of the tube not lighting up but the neck is glowing ? then that's a good spot to start

ed

[proaudiosoft]

ok, yeah the neck is not glowing in my case. Is it a correct assumption that since I had a resistor fall off on the neck board that it is most certainly my source of trouble?

[ed12]

the neck not glowing is a function of the flyback
so what u need to do first
is find out why u do not have sweep >high voltage<
and work from there.
on that chassic u luck out wellsgarnder has a d/l page of pdf's where that model is covered
chk the smps output also look into a cap kit for it .

ed

[proaudiosoft]

Believe it or not, the resistor r242 I soldered back in fell out again. It was soldered in well. Something is making the solder joints on r242 heat up. Anyone have a clue?

[ed12]

the neck board is sourcing to much current
I will look up the pdf and see why

ed

[ed12]

I think yours on there site is the next 1 up which I cannot seem to find the pdf for at the moment
but here

ed

[proaudiosoft]

I think yours on there site is the next 1 up which I cannot seem to find the pdf for at the moment
but here

ed

Ok thanks alot Ed!, if you find it let me know. Kinda lost why its doing this right now.  Monitors aren't really my thing. I would love to get this one up and running. I will gladly send a few appreciation greenbacks!

[ed12]

I know I saw a few good write ups on that exact model #
let me see if I can find them , if not I will dig through my back-up's

ed

[ed12]

this will help u a bit to get the exact model # u need

ed

[proaudiosoft]

Thanks, I will take a look at it. One thing I found is a bad transistor q201. I am not sure how this might be effecting r242 though.

edit: so my monitor is basically a D9200 as I thought. (wgm2792-u0ts29k) Wells Gardner monitor, 27" CGA/EGA/VGA Universal TV grade 29K.

[ed12]

now I will find u the rare gold >d9200<
I have it , but server is acting goofie tonight ?

ed

[ed12]

lets see if the server god's are up ?

ed

[proaudiosoft]

lets see if the server god's are up ?

ed

Hast thou server gods forsaken us?

[ed12]

5-x

ed

[proaudiosoft]

5-x

ed

Can I be pretty sure this is a neck board issue do you think Ed? I am thinking of sending it of to someone on ebay for repair. It would certainly be nice to just sip the neck board

[ed12]

well as u know by now
from not only this form but klov
that they were and are a pita to repair
and most ppl do not want to do them
I on the other hand have done several and find them easy if u just follow the rules
if I can up-load a paper on the trouble shooting guide ? I will.

ed

[proaudiosoft]

ok, thanks

[ed12]

well I thought problem was my end...!!!!!! !!!!! turns out fregging 520k up-load max
wapita
pm your info I can send it to u faster via snail mail
or go to wg and d/l u5000 same basic theory

ed

[proaudiosoft]

well I thought problem was my end...!!!!!! !!!!! turns out fregging 520k up-load max
wapita
pm your info I can send it to u faster via snail mail
or go to wg and d/l u5000 same basic theory

ed

Apparently there are two different neck boards for the D9200 .... Wondering if this will fit mine:  http://forums.arcade-museum.com/showthread.php?p=3431996#post3431996

[ed12]

e-mail sent 9meg of it holy crap!!!! thought hot mail was gonna choke

do not buy a neck board !!yet!! u have chassic work to go first
if any thing get a full cap kit..
next we need to chk to make sure u can get sweep.. sweep is very important.
this will become very clear for u

ed

[ed12]

un-les u never caught the drift ?
d9200 is a digital tri-state for the u5000

your neck board is the very least of your problems right now..

u must in an a-sending order chk a few things.

a=is the switching power supply working yes/no ?
if no why ?
b=if yes then my chk points >listed as tp101-tp-xx voltages there ?
if yes ?
then we move to sweep.
u see these chk points need to pass the mustard first

ed

ps
I hope u got the e-mail?

[proaudiosoft]

un-les u never caught the drift ?
d9200 is a digital tri-state for the u5000

your neck board is the very least of your problems right now..

u must in an a-sending order chk a few things.

a=is the switching power supply working yes/no ?
if no why ?
b=if yes then my chk points >listed as tp101-tp-xx voltages there ?
if yes ?
then we move to sweep.
u see these chk points need to pass the mustard first

ed

ps
I hope u got the e-mail?

I got it. But you sent the U5000 service manual?

[ed12]

as I have tried to point out
u5000 and d9000 are kissing cousins
there theory of operation is the same.
using the schematic I posted to u earlier along with the trouble shooting guide of the u5000 should get u right into the infield of the repair
that u are under taking.
there is very little data on the d9200 series

ed

[proaudiosoft]

ok, thank you