Best Replacement Chassis for D29CR55

NCC-1701

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I have an 29" Toshiba Tube with D29CR55 out of DDR, need suggestions for a drop in chassis for this monitor. The Tube is an A68KTB189X, Yoke ID: TDY-5290A, Vertical Grn/Yellow measures 5ohms, Horizontal Red/Blue measures 1 ohm, CR23 on the tube neck. I tried to rebuild it without a schematic since none exists, posted for help on here, and no response so this odd ball is getting tossed in the trash.
 
Whats it doing? I just sent one of these bad boys in for repair to a local TV shop here in Dallas.

I wouldnt scrap that thing unless the flyback is bad. Its lasted the better part of 15-20 years without a need for repair. They are great chassis that dont break which is why there is so little info about them online.

FWIW, Betson (all over the country) can fix them but you have to send the chassis in with the yoke (they usually dont have that yoke). I'd call before I sent it in though.

As far as drop in chassis goes, no clue. Drop in monitor... I've only been able to get Wells D9200's and D9400's to work in this game. But, they both have slight tears in the top of the screen. LCD's wont sync to the game (at least none I've found), there is a makvision that will work but you have to dial back the vert size. If you dont it will jiggle like mad. Kortek wont work either.
 
I'll start from the beginning. I had no picture no HV on monitor, found HOT to be dead, replaced HOT fired up, tube not lit, reseated all the ribbon connectors from the Yoke, fired up monitor displayed White Horizontal lines 1 inch across the full screen top to bottom, ran on bench, powered on and off several more times, had HV, were good to go so back into the DDR, powered up in the DDR, monitor dead again Huh?, back on bench HOT is good, no HV, started checking voltage across the caps outside the primary section, found low DC voltage across the caps outside of the Primary section, have A/C but low DC readings.

I decided to replace the switching VR6511 on the large heat sink, power up, chassis starts to make a faint fast paced ticking sound, almost like it's buzzing but there are breaks in the audible low pitch noise, this time the White lines only appear when I turn the monitor off, discharge the annode, loud pop so I had HV, not sure where the ticking sound is coming, but I do know that the chassis should not produce any audible noise when running. It has made this same sound from phase one when I first installed the first new HOT.

Basically it's eating HOT's not right away, likes to savor them first teasing me with a lit tube then blowing the hot eventually, after installing 3 HOT's, 1 new 6511, reflowing the heck out of everything, finally gave it one more stab, and it starts smoking from the chassis, something new, and of course HOT #3 is fried, inspected the chassis, found nothing fried but it smoked pretty good, smoke for me signals "I'm Done" I did inspect the outer Flyback casing, everthing looks good.

In summary, I have had HV on and off, audible noise from the chassis, smoke 3X from the chassis, replaced 3 HOT's, 1 VR6511, All caps checked for ESR, Fuse has remained good, never blown, there is no schematic and I can't seem to even locate a replacement flyback, so if you have any report as to how they fixed yours and what was replaced that would be great, but at the moment I'm on the bench lying down with this beauty.
 
Holy cow... Well, in that case I can see why your sick of the thing.

When the place thats fixing mine gets back to me I'll let you know what they found. In the meantime I've purchased a CGA upscanner (to VGA) to try an LCD in this thing. I tried pumping the signal from the CPU to a LCD thats supposed to sync to CGA but all it would do is flash from time to time. Also tried a Kortek and I dont have any Wells to toss into the machine.
 
Holy cow... Well, in that case I can see why your sick of the thing.

When the place thats fixing mine gets back to me I'll let you know what they found. In the meantime I've purchased a CGA upscanner (to VGA) to try an LCD in this thing. I tried pumping the signal from the CPU to a LCD thats supposed to sync to CGA but all it would do is flash from time to time. Also tried a Kortek and I dont have any Wells to toss into the machine.

Yep, Holy Cow sums it up. I called over to Betson to see if they could tackle it, still waiting for a return call, still hoping that another member conquered this chassis and would post the results, not finding anything solid in prior posts, some have had similar issues, think Mod had one and came up with a Cap kit for it, another member I believe used an K7500 reworking the connections, but nothing concrete so far.
 
junked mine. sourced a 27" WG U5000 in its place... best idea ever. it's too bad though, was a decent tube.

I kept the chassis and yoke though, mine was just popping the HOT. if you wanna explore that avenue. Jomac told me there's a possibility the yoke was bad on that, so maybe the chassis is ok. he's based out of Australia and fixes them.
 
junked mine. sourced a 27" WG U5000 in its place... best idea ever. it's too bad though, was a decent tube.

I kept the chassis and yoke though, mine was just popping the HOT. if you wanna explore that avenue. Jomac told me there's a possibility the yoke was bad on that, so maybe the chassis is ok. he's based out of Australia and fixes them.

I would have glady paid another member to have this fixed, problem is no thirsty horses in the stable, and I always remember that old saying...you can lead a horse to water but you can't me him drink, my Dads favorite quote...by the way any thirsty horses out there interested in fixing this for a fee.
 
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