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Left the monitor running for over an hour and noticed that the picture was dark, but still visible. A drastic improvement over its previous setting. Adjusting the focus setting on the flyback still causes the picture to get significantly brighter. However it still fades over several seconds...

Shotgunned this one. I noticed that the retainer for the convergence rings was not straight, so I adjusted that. Then I reflowed every pad on the neckboard. Currently the monitor has been running for 20 minutes with no issues. The convergence is way off. But it's a start at least.

Revisited this chassis again tonight. Powered on and saw retrace lines then the picture went entirely white regardless of adjustments. Set everything to 12 o clock, adjusted the flyback with no change. Shut down and reapplied power, then received an image that faded to nothing but very dim...

Replaced all the caps and reflowed the input pins. Monitor came up and the picture stayed on screen. Color is off and needs some ring adjustments. No red color at all. This chassis came out of a cabinet with a necked tube and the red cutoff pot was damaged. The pot was already replaced, so I am...

Installed the new flyback and the screen still shows no picture unless the focus is adjusted. It stays on longer and is brighter, but still fades out gradually after the adjustment is made.

Found this in archives of the Bestech website today looking for more information on the Bestech chassis. Haven't seen this part list posted anywhere else, so i'm leaving it here in case it is useful to anyone else.

Took a video of the issue at hand: https://vimeo.com/864256641?share=copy

Swapped the yoke tonight and things look a bit better as far as picture dimensions go. Still need to dial it in, but i need to get a consistent picture first. Adjusting focus on the flyback displays an image that fades to black. I have a new flyback on the way, as well as a cap kit, but I...

Checked the heater voltage and pinout of the original tube (a48qad220x) and it seemed like everything should be good. Decided to let it rip and threw the chassis in. I get neck glow, but heard some arcing and could not see a picture. Cleaned the anode cap and the arcing calmed down...

Absolutely. Sent you a pm.

Received my order and these look great. Thank you again for doing these!

Found a good deal semi-local for a different chassis. Picked up a Torvis mtg-2901cn (1901cn? Chassis has both markings) with an original yoke. This tube (a48krd82x02) seemed like a good swap for it. The current yoke on the tube is a dse-1992nl measuring 13.5/1.8 ohms. The yoke that came with...

Tested the other chassis without a recap. No noticable neck glow, but a very faint picture with an occasional cracking noise (arcing?). Swapped the c5298 transistor (HOT?) and horizontal width coil into the chassis making the clicking noise. No change. Swapped the flyback. No change. Tried...

I picked up a pair of Bestech btm-19cm chassis listed as not working. I'm aware of the negative sentiment about these, and I am sure it has been earned, but the price was right for a couple of project pieces to learn on. I recapped one chassis with the exception of a few caps on the neckboard...

I have been a lurker here for some time now and I figured it was time I join and contribute. I have been a game collector for some time now. Mostly consoles, but i've always wanted to get more into arcades. I used to be on racketboy and the neo-geo forums under this username, but fell out of...

Thank you for your reply. I ordered an la7830. I found that schematic and parts list earlier, but the cap values didn't match what was on the board so i was not positive if the parts matched up. This chassis has definitely been repaired before, so that may be why the values are different. Either...

I recently purchased this A-One AM-0629 chassis to use in a cabinet. When purchased it was operational but had a wavy image. I cleaned everything up and replaced the capacitors including the filter capacitor. After doing this the monitor is now suffering from vertical collapse. Audio comes...

Please put me down for a 20 pack.