Electrohome G07 No Green

Robotronguy

Well-known member

Donor 2013
Joined
Aug 11, 2008
Messages
2,169
Reaction score
74
Location
Tooele, Utah
Have a G07 that had a bad flyback,replaced that and also had to replace the blown fuse that is soldered in the chassis that is located at about the middle of the board.Monitor works now but it has no green.I stuck a rejuvinator on it and got all the guns in real good working order,so it is not the tube.Metered the driver transistors on the neck board and have no shorts,metered all three and i get basically the same readings so they are good.I havent done a cap kit on it yet but didnt think that would cause this problem.Any other ideas?
 
Troubleshooting

I am sure more skilled people will chime in here; but I had the opposite problem too much green. Had to desolder the transistors to find the culprit, so not sure how well the in-circuit readings work. Good luck with that run really well once tuned up.
 
I am sure more skilled people will chime in here; but I had the opposite problem too much green. Had to desolder the transistors to find the culprit, so not sure how well the in-circuit readings work. Good luck with that run really well once tuned up.

Hmmmm,i guess maybe ill take the transistor out and replace it just to see.
 
Don't forget that there are also transistors on the main board which work with each colour.

Also, rule out the gameboard/wiring before you go chasing ghosts that are not there.
 
Don't forget that there are also transistors on the main board which work with each colour.

Also, rule out the gameboard/wiring before you go chasing ghosts that are not there.


I am going to check the wiring today,ran out of time last night.Going to plug monitor into another game,or throw chassis in another monitor to narrow it down.Thanks for the advice.
 
Well...its the chassis,but im not sure where the problem would be.The 2 green adjuster pots(color pot and the other one)on the neck board are in real good shape and no sign of damage,i didnt replace them yet.Also the transistors on the neck board are fine.Where on the chassis should i be checking?
 
Going through the same on a cracked board repair, after I stepping away from it. I realized from schematics that the markings on the PCB were confusing. Green is not the middle but closest to the X102 markings. Technically below the X103.IMG_20230826_175637.jpg
 
Going through the same on a cracked board repair, after I stepping away from it. I realized from schematics that the markings on the PCB were confusing. Green is not the middle but closest to the X102 markings. Technically below the X103.View attachment 687471
looks like you need a new neck PCB which we have in stock.
 
Interesting, saw it on Mike's YouTube, but.. can't find it on the AP&R storefront yet. Send me a link.
He's mentioned before he has 100s of products just not listed on his site, just due to the time it takes to list them.
@security0001 ,Idea. Instead of full product pages, how about just a page with a text listing of the products saying to contact you if interested? That would be a good interim solution. If you were closer I would volunteer to come help you out :)
 
He's mentioned before he has 100s of products just not listed on his site, just due to the time it takes to list them.
@security0001 ,Idea. Instead of full product pages, how about just a page with a text listing of the products saying to contact you if interested? That would be a good interim solution. If you were closer I would volunteer to come help you out :)
And an order link in the text. (Add to cart)
 
Interesting, saw it on Mike's YouTube, but.. can't find it on the AP&R storefront yet. Send me a link.
yes i have in stock along with about 400+ other new products that aren't on the site yet but i haven't found an easy way to get them on as this time of the year i have many projects that have to get done before the snow flies. if you need one shoot me an email is the easiest way until i get them on the site but some of the boards will be going on soon. i bet nobody knew i had B&K adapters which are designed without wiring needed which will be so much cleaner and easier. alot of these boards i started doing many years ago but got so busy with life i couldn't devote more than 60 hours a week to the site as i also work full time so i put in 80-105 hours a week especially during the non-snow months here.
 
Screenshot_20230828-152922~2.png

The green transistors on both PCBs pass in and out of circuit.resistors. POTs previously replaced, green pot resistance varies but no effect. Continuity of green cable ok. Continuity to socket ok. Grounded Neck transistor show correct full colors. Reflowed again. Tube guns good. Magnifiers making me blurry eyed again. Noticed 1k resistors on RGB pots in circuit are at 800 B, 600, 600k. May be going back in box soon.
 
yes i have in stock along with about 400+ other new products that aren't on the site yet but i haven't found an easy way to get them on as this time of the year i have many projects that have to get done before the snow flies. if you need one shoot me an email is the easiest way until i get them on the site but some of the boards will be going on soon. i bet nobody knew i had B&K adapters which are designed without wiring needed which will be so much cleaner and easier. alot of these boards i started doing many years ago but got so busy with life i couldn't devote more than 60 hours a week to the site as i also work full time so i put in 80-105 hours a week especially during the non-snow months here.
So how much, and how would I add it to my next AP&R order?
 
I had a color go out on a G07, and it turned out to be one of the color transistors on the chassis board.

I had a color go out on a G07, and it turned out to be one of the color transistors on the chassis board.
Thought I pulled and tested the board transistors as fine, but saw a post that suggested swopping transistors from known working color. With some care on orientation, I was able to ID the chassis board culprit, order ,and now have turned not working green to not working red...until parts arrive 🤞. The patched neck board did need one transistor and 2 resistor replacements previously, so this will qualify for the most reflowed board ever. 😉
 
Back
Top Bottom