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FS Egret 2/Windy 2/NNC/Q25 (Repair refund)

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ok I connected weiya chassis worked for 5 minutes then it stopped we working. Monitor is fine. I think psu died.

Would anyone with any technical knowledge look at my psu and repair it. It's way above my head.
 
:o
 

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Alright, I can finally write about my whole experience.

After this guy Grant from the UK would not share the identity of the replacement flyback for the Toshiba chassis, I had to dig some more and come to the conclusion that this chassis shares the same flyback with the Nanao MS2931 tri-sync monitor.



Clues were :
- People have been buying the MS2931 as a replacement drop-in chassis because it is the exact same tube.
- Looking at pictures of the MS2931 and the Toshiba PB7534, the flybacks look absolutely identical.
- Finally, one of the 3 chassis I have on hand for repair has a flyback with the markings MSU1FUS11 on it, the others having reference from a Toshiba parts catalogue I'd have to guess.

CONCLUSION : Same exact flyback. Works great, 15kHz, 31kHz.



You can get the flyback from taobao through a proxy, or from donberg electronics in Ireland :
https://www.donberg.ie/descript/m/msuifus11.htm
https://item.taobao.com/item.htm?id=594979186324&spm=1101.1101.N.N.d8721ff

What had to be done also, a complete recap for one, I had some blown film capacitors too, and a few parts from our friends over at utsource :

HOT 2SC4288 : https://www.utsource.net/itm/p/1238239.html
Damper diode FMQ-3GU : https://www.utsource.net/itm/p/1710145.html
Bipolar diode D716 : https://www.utsource.net/itm/p/4370189.html
Vertical deflector LA7837 : https://www.utsource.net/itm/p/1016522.html

I just swapped a few parts and not an engineer / expert technician.... and they work great now.
 
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Already made the order with UTSource. They are awesome to deal with btw. Working with a Chinese buddy on the Taobao parts now. Going to grab spares. I believe the FB is the same for the Toshiba Pure Flats as well, if I am not mistaken? I will find out this weekend. If not, I suppose I will have a few spares to share.

Thanks for the 411 @SnakeGrunger.
 
Alright, flybacks from Taobao will be here on the Sept 16th (EDIT: I had my friend buy 10 of them). UTSource parts should be here by then too. Will keep you guys posted.
 
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SnakeGrunger said:
Alright, I can finally write about my whole experience.

After this guy Grant from the UK would not share the identity of the replacement flyback for the Toshiba chassis, I had to dig some more and come to the conclusion that this chassis shares the same flyback with the Nanao MS2931 tri-sync monitor.


Clues were :
- People have been buying the MS2931 as a replacement drop-in chassis because it is the exact same tube.
- Looking at pictures of the MS2931 and the Toshiba PB7534, the flybacks look absolutely identical.
- Finally, one of the 3 chassis I have on hand for repair has a flyback with the markings MSU1FUS11 on it, the others having reference from a Toshiba parts catalogue I'd have to guess.

CONCLUSION : Same exact flyback. Works great, 15kHz, 31kHz.



You can get the flyback from taobao through a proxy, or from donberg electronics in Ireland :
https://www.donberg.ie/descript/m/msuifus11.htm
https://item.taobao.com/item.htm?id=594979186324&spm=1101.1101.N.N.d8721ff

What had to be done also, a complete recap for one, I had some blown film capacitors too, and a few parts from our friends over at utsource :

HOT 2SC4288 : https://www.utsource.net/itm/p/1238239.html
Damper diode FMQ-3GU : https://www.utsource.net/itm/p/1710145.html
Bipolar diode D716 : https://www.utsource.net/itm/p/4370189.html
Vertical deflector LA7837 : https://www.utsource.net/itm/p/1016522.html

I just swapped a few parts and not an engineer / expert technician.... and they work great now.
Click to expand...
Nice work!

Do you have any Width / Horizontal issues? The picture on mine is about 1” too wide on the narrowest settings on the chassis and remote board. Neo geo is particularly bad, it’s constantly over-scanned
 
acblunden2 said:
BTW, @SnakeGrunger, looks like you are using a Sync Strike to connect your consoles to the Windy II if I am not mistaken?
Click to expand...
This is just for testing... but yes syncstrike + console for now, easier than to load the jammafier + game as I go through power cycles. Plus easy to load a 240p test suite.
thomas3184 said:
I thought this was old news with a whole thread about it: Here.
Click to expand...
This is not the same monitor chassis at all.

@markedkiller78 there is a seperate H.Size pots for 15, 24 and 31kHz on the chassis itself, that way you can shrink it some more and make micro adjustments with the pots under the CP.

 
I have the same issues as the MS29-31 thread with the flyback on mine. I assume it’s the same one grantspain uses as all the w2 chassis he’s repaired have the same issue.

I can’t speak for him, but I know it’s one of the reasons he has given for sitting on the flyback details. Under his instruction, I soldered a cap to the chassis, but it didn’t fix the issue :(

Edit: I’ve not tested 24k, but 15k and 31k are at min on the chassis, which introduces issues itself.
 
markedkiller78 said:
I have the same issues as the MS29-31 thread with the flyback on mine. I assume it’s the same one grantspain uses as all the w2 chassis he’s repaired have the same issue.

I can’t speak for him, but I know it’s one of the reasons he has given for sitting on the flyback details. Under his instruction, I soldered a cap to the chassis, but it didn’t fix the issue :(

Edit: I’ve not tested 24k, but 15k and 31k are at min on the chassis, which introduces issues itself.
Click to expand...
One of the chassis I fixed had a very large image and some pincushion issue and I couldn't figure out what was wrong with it. Turns out it had a few busted film capacitors close to the HOT transistor, like this :

 
SnakeGrunger said:
Alright, I can finally write about my whole experience.

After this guy Grant from the UK would not share the identity of the replacement flyback for the Toshiba chassis, I had to dig some more and come to the conclusion that this chassis shares the same flyback with the Nanao MS2931 tri-sync monitor.



Clues were :
- People have been buying the MS2931 as a replacement drop-in chassis because it is the exact same tube.
- Looking at pictures of the MS2931 and the Toshiba PB7534, the flybacks look absolutely identical.
- Finally, one of the 3 chassis I have on hand for repair has a flyback with the markings MSU1FUS11 on it, the others having reference from a Toshiba parts catalogue I'd have to guess.

CONCLUSION : Same exact flyback. Works great, 15kHz, 31kHz.



You can get the flyback from taobao through a proxy, or from donberg electronics in Ireland :
https://www.donberg.ie/descript/m/msuifus11.htm
https://item.taobao.com/item.htm?id=594979186324&spm=1101.1101.N.N.d8721ff

What had to be done also, a complete recap for one, I had some blown film capacitors too, and a few parts from our friends over at utsource :

HOT 2SC4288 : https://www.utsource.net/itm/p/1238239.html
Damper diode FMQ-3GU : https://www.utsource.net/itm/p/1710145.html
Bipolar diode D716 : https://www.utsource.net/itm/p/4370189.html
Vertical deflector LA7837 : https://www.utsource.net/itm/p/1016522.html

I just swapped a few parts and not an engineer / expert technician.... and they work great now.
Click to expand...
That's really great info, I suspected they used the same flyback but it's huge to have confirmation.
 
SnakeGrunger said:
One of the chassis I fixed had a very large image and some pincushion issue and I couldn't figure out what was wrong with it. Turns out it had a few busted film capacitors close to the HOT transistor, like this :
Click to expand...
Do you still have or can you retrieve the values on those capacitors you replaced?
 
@acblunden2 you'd have to check your chassis and determine which ones seem blown. Those are usually marked with the values and voltages on them, such as "472H 1800V", 472 is 47E2, so 47 x 10² = 4700pF, 1800V range. Letter H is +/- 3% tolerance.

https://www.mouser.ca/ProductDetail/80-R76UI1470SE40J

This one is +/- 5%, which I had to take because 3% wasn't available. I changed those after doing a recap and flyback replacement because I had horizontal sizing issues (31kHz wouldn't fill up half the screen LOL)
 
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