(Topic ID: 89874)

RFM: "Hillary, come here! You gotta see this!"


By kjm8888

5 years ago



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  • Latest reply 7 hours ago by Ricochet
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There are 3229 posts in this topic. You are on page 65 of 65.
#3201 6 days ago
Quoted from msj2222:

I just dont understand why the problem would escalate by just reflowing. Is there a way to verify its a bad pot? Are the the ohms printed on the top?

Even touching the adjustment part of the pot if it's going/gone bad would create effects on the screen (lines, etc) I'm not sure if those numbers in your pic 52, 25 are the values and i don't have my machine any more to confirm for you. Do you know what type of monitor and board you have in the machine? usually they are either Wells Gardner or Ducksan. From your earlier pic showing most of the remote board it looks like it may be a Ducksan. There will be others in the club who can confirm what value pot you will need. The 52 "could" stand for 520K but i can't be positive on that.

#3202 6 days ago

(to follow)

#3203 5 days ago

More likely 5 plus 2 zeros... IE 500 ohms.
Look at the schematics to confirm.

To test a pot for opens; you should see ?500 ohms? across the two outside pins. (DVM in resistance mode)
The wiper would measure a percent of that value.

Wipers go bad regularly on these cheap pots. Heat could make it worse.
Also it looks like you ?may? have soldered on the top part of the pot instead of the pin side (bottom of board); if you did - it's possible you may have contaminated the wiper ring on the top side of the pot with solder flux.

#3204 5 days ago
Quoted from Zitt:

More likely 5 plus 2 zeros... IE 500 ohms.
Look at the schematics to confirm.
To test a pot for opens; you should see ?500 ohms? across the two outside pins. (DVM in resistance mode)
The wiper would measure a percent of that value.
Wipers go bad regularly on these cheap pots. Heat could make it worse.
Also it looks like you ?may? have soldered on the top part of the pot instead of the pin side (bottom of board); if you did - it's possible you may have contaminated the wiper ring on the top side of the pot with solder flux.

Quoted from Mancave:

Even touching the adjustment part of the pot if it's going/gone bad would create effects on the screen (lines, etc) I'm not sure if those numbers in your pic 52, 25 are the values and i don't have my machine any more to confirm for you. Do you know what type of monitor and board you have in the machine? usually they are either Wells Gardner or Ducksan. From your earlier pic showing most of the remote board it looks like it may be a Ducksan. There will be others in the club who can confirm what value pot you will need. The 52 "could" stand for 520K but i can't be positive on that.

any idea where to source these pots? I did a quick search and didnt find this type. I have to admit Im out of my element here but I am willing to give it a try & learn.

#3205 5 days ago
Quoted from msj2222:

any idea where to source these pots?

I don't. Matching pots is hard to do unless you have the original part number.
The problem is everyone seems to make the pots a little different... and no standard "packages" really exist.
If you knew who the original manufacturer was; you might be able to cross to it.
Sadly; the only sure fire way to find the right pot is to measure critical dems and then consult a parametric search like on Digikey.com. And even then; you wouldn't know for sure until you had the replacement in hand to verify.

That said; you might be able to shot-gun buy something and then "make" it work.

#3206 5 days ago
Quoted from Zitt:

I don't. Matching pots is hard to do unless you have the original part number

Shouldn't you only need to have the correct ohm value and the same leg pattern, usually in a tri leg pattern but the distance between the legs can be smaller or larger?? All i did for the Super Offroad remote board was match the ohm value to the particular pot i was changing and got the matching leg size as close as possible (these can be slightly bent inwards/outwards if needed) and it worked 100%. Must admit i don't have any experience with the Ducksan board but i would have thought the basics would be the same?
These are the style i used for the SOR board, link is for the 500k though.
https://www.altronics.com.au/p/r2485b-500k-5mm-top-adjust-trimpot/

msj2222 Ok did a bit of googling and it appears that the remote board in question is a Wells Gardner K7300 series. The code number on the remote board matches the code at the end of the page in this link. If the number on the Vertical hold pot is correct in the picture then this info might come in handy (scan down the page to see the trimpot code listing), according to the references it is a 200k pot but i would still be checking the values by testing.
https://www.arcade-museum.com/manuals-monitors/Wells-Gardner_K7300_series_repair.pdf

#3207 5 days ago

kenlayton is a member here on pinside. you may want to reach out to him since he was the one that wrote the wells gardner K7300 repair guide

#3208 5 days ago

I really think Im over my head with this, Does anyone know of someone in my area that can do this repair or if I can just order the new parts. I am afraid if I attempt this I will just compound the problem.

#3209 5 days ago

Someone knows if decals for the inserts are on sale in anyplace?
Thanks

#3210 5 days ago

If any one needs a new sheet of glass please message me. Not sure what shipping will be but its coming from Canada.

#3211 4 days ago

Anyone know of where i could find or what to use as a round dome top for the saucers? Was going to peruse Target and Walmart's cosmetic aisles to see if any make up products have a plastic top i could use. I haven't done any 3d modeling before, but was thinking of maybe trying to make a saucer look like the ones on the translite. Otherwise i might just try out some chrome spraypaint on mine as a trial. I'm hoping to get led saucers from applejuice if he's doing another batch. I like the idea of a basic metal saucer more than the stock design.

Also, toying with the idea of getting these amazon.com link » and putting and orange led as the missile engine and maybe running it along the shooter lane and have them flash with those red lights... my plastic with the missiles is cracked, so thought maybe that would cover it up. Just don't want to make it look cluttered or tacky looking with pointless stuff...

#3212 4 days ago
Quoted from msj2222:

I just dont understand why the problem would escalate by just reflowing. Is there a way to verify its a bad pot? Are the the ohms printed on the top?[quoted image]

Pots go bad far more often than the solder joints themselves, especially ancient pots in old video games. The heat from your reflowing can also distort the elements of the pot, chemically alter dirt and oxidation, and other aggravation to an already worn out pot.

All you need is the schematic for the make & model of your monitor, usually the value is found there. In the example, a typical Wells-Gardner K7000 monitor schematic indicating the value of a pot. You'll need to remove the pot from the board for accurate testing, which is why it is usually desired to just replace the pot for long term reliability
https://www.wikihow.com/Test-a-Potentiometer

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#3213 4 days ago
Quoted from TBatti:

If any one needs a new sheet of glass please message me. Not sure what shipping will be but its coming from Canada.

speaking of that (without attempting to steal your thunder), I too have an extra sheet of NOS P2K glass still in the quad walled cardboard shipping box. I can bring it with me to expo for someone that doesn't want to pay shipping. $150

pm me to set up a "drug deal" parking lot exchange at the hotel. I will be there oct 16-19 (wed-sat)

#3214 4 days ago
Quoted from zerbam:

any one have this plastic that i need?[quoted image]

Anyone find that they had this plastic they will part with?

#3215 4 days ago
Quoted from zerbam:

Anyone find that they had this plastic they will part with?

Would you be ok with a used piece?

I have an entire set of new plastics I will be installing on mine... I'll check when I get home to see if the current one that is installed is in good shape. I don't believe I have any broken plastics at all on my machine... but who knows.

#3216 4 days ago

that would be great.......currently have a homemade one that is not even the right shape or graphics.....

#3217 3 days ago

I have had no luck finding a new remote adjustment board (Wells Gargner P809). So , again, if anyone can lead me to a source or someone who can repair mine, it would be much appreciated.

#3218 2 days ago

For anyone who was interested, I published my shaker cover design on Thingiverse.

https://www.thingiverse.com/thing:3862516

#3219 2 days ago
Quoted from msj2222:

I have had no luck finding a new remote adjustment board (Wells Gargner P809). So , again, if anyone can lead me to a source or someone who can repair mine, it would be much appreciated.

Try messaging applejuice i know he has some chassis boards for sale and may be able to help you out with a spare or even a changeover maybe?
I would replace the pot for you but it wouldn't be worth the cost of posting to me and back again, the pots themselves are worth bugger all. The other thing is i wouldn't be able to confirm the pot changeover is the main culprit as i don't have the machine any more to test it in. I'm still fairly confident that is the problem though. Hopefully someone your side of the pond can help you out.

#3220 2 days ago
Quoted from Mancave:

Try messaging applejuice i know he has some chassis boards for sale and may be able to help you out with a spare or even a changeover maybe?
I would replace the pot for you but it wouldn't be worth the cost of posting to me and back again, the pots themselves are worth bugger all. The other thing is i wouldn't be able to confirm the pot changeover is the main culprit as i don't have the machine any more to test it in. I'm still fairly confident that is the problem though. Hopefully someone your side of the pond can help you out.

Thanks for you efforts. I have been hitting a brick wall every lead I have.KenLayton never replied to my pm and i cant find a match for that pot. Seems like others have had a really tough time finding that particular remote board. Very fustrating!

#3221 2 days ago

still looking for this one...............thanks

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#3222 2 days ago
Quoted from zerbam:

still looking for this one...............thanks[quoted image]

I know this is more than what you need but the price isn’t too bad if it’s indeed a complete set...

ebay.com link

#3223 2 days ago
Quoted from msj2222:

Thanks for you efforts. I have been hitting a brick wall every lead I have.KenLayton never replied to my pm and i cant find a match for that pot. Seems like others have had a really tough time finding that particular remote board. Very fustrating!

No worries at all i just hope you can get it sorted. Until someone tells me that i'm totally wrong (and that's quite possible ) i'm still of the opinion that any tri leg pot that has the same value as the suspected bad one (and pretty sure the Vertical hold is 200k) will be fine to replace. I don't think you need to have a pot that is from the same/original manufacturer, the ohm value is the most important factor and the watt rating will be consistent i think. I didn't need to source an "original" pot for my Super Offroad remote board, just matched the ohm rating as previously mentioned and that worked fine!

#3224 2 days ago
Quoted from Mancave:

No worries at all i just hope you can get it sorted. Until someone tells me that i'm totally wrong (and that's quite possible ) i'm still of the opinion that any tri leg pot that has the same value as the suspected bad one (and pretty sure the Vertical hold is 200k) will be fine to replace. I don't think you need to have a pot that is from the same/original manufacturer, the ohm value is the most important factor and the watt rating will be consistent i think. I didn't need to source an "original" pot for my Super Offroad remote board, just matched the ohm rating as previously mentioned and that worked fine!

I havent found the wattage. The 200k seems consistant with what I have found. Do you think this is a suitable substitute
https://www.arcadepartsandrepair.com/store/components/trimmer-potentiometers-pots/200k-ohm-trimmer-potentiometer-p1009/

#3225 2 days ago
Quoted from msj2222:

I havent found the wattage. The 200k seems consistant with what I have found. Do you think this is a suitable substitute
https://www.arcadepartsandrepair.com/store/components/trimmer-potentiometers-pots/200k-ohm-trimmer-potentiometer-p1009/

Yep they should be fine, 1/2 watt seems to be the norm for these and the Ohm value is correct according to Ken's write up (and the code number on your board definitely matches the code number in his write up also, it's the same board i'm sure). The distance between the legs can be altered by slightly bending, only really needs a few mm of the tip of the leg anyway to go through the thickness of the board to be soldered. Ideally you would use a solder sucker to remove the old solder from the original pot which would then virtually fall away from the board. The main thing is NOT to apply too much heat to the board for too long, if you do you can potentially stuff the "tracks" of the board.

#3226 8 hours ago
Quoted from Ricochet:

I know this is more than what you need but the price isn’t too bad if it’s indeed a complete set...
ebay.com link

that is definitely NOT a complete set. the question is just how many of the actual 17 playfield (+1 backboard) plastics are included. for $130 you can get a complete set which also includes the 8-9 promo pcs.
https://www.marcospecialties.com/pinball-parts/31-3437-Set

#3227 7 hours ago
Quoted from j_m_:

speaking of that (without attempting to steal your thunder), I too have an extra sheet of NOS P2K glass still in the quad walled cardboard shipping box. I can bring it with me to expo for someone that doesn't want to pay shipping. $150
pm me to set up a "drug deal" parking lot exchange at the hotel. I will be there oct 16-19 (wed-sat)

If I were going to Expo I'd get it. Great price.

#3228 7 hours ago
Quoted from zerbam:

still looking for this one...............thanks[quoted image]

Yeah I could use one too. But I'll try to make one, I have a stationary belt sander and a scroll sander which will make it easily. Also have some different colored plex.
I made a Jackbot mini pf that's 99.99 perfect so this little piece should be a piece of cake.

#3229 7 hours ago
Quoted from j_m_:

that is definitely NOT a complete set. the question is just how many of the actual 17 playfield (+1 backboard) plastics are included. for $130 you can get a complete set which also includes the 8-9 promo pcs.
https://www.marcospecialties.com/pinball-parts/31-3437-Set

Yup... marco is the way to go!

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