Problem Toei Chassis/Tube Swap
- Thread starter jerryspaghetti
- Start date
jerryspaghetti
Active member
Cool, thanks for that. I'll keep investigating!I don’t think that affects the width is more to do with the contrast.
Check this thread, I swapped the 3.3 for a 1.5 ohm resistor.
Nanao chassis, Hitachi tube?
I received two Super Neo 29 Candy cabs today, and I'm excited to get them up and running. The seller shipped them with the original Hitachi A68LFP227X tubes, but said that the Toshiba chassis were dead and he was including a pair of Nanao MS9 chassis instead. But... The connectors are...www.arcade-projects.com
jerryspaghetti
Active member
B+ was slightly low. About 72-73v. When I moved it up to the recommended 76v it helped a little but only by driving up to 83-84v made it fill the screen horizontally. I did this only for a few seconds as I was concerned this could be bad for the flyback/caps.
Is a 7-8v (9-10%) increase in voltage unacceptable you think?
Is it enough to fry the caps/flyback etc or would it only really pop a fuse?
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jerryspaghetti
Active member
See update above.
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jerryspaghetti
Active member
Feared as much. It looked so good too!!!!
I'll check that cap today mate. Is it the super cap that engages with the wide jumper?
Even if I pushed it to about 80v it'd get me so close as to be happy with it tbh but best to be safe.
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jerryspaghetti
Active member
S cap maybe its called? Assumed it meant 'Super'
Its the two big green 'pillow shaped' ones next to the Narrow/Wide jumper. The Wide jumper engages one of them I read. Just thought it might be one of them.
I'll have a proper look after work though thanks mate.
Retroman839
Senior Member
Pardon the interjection 😁
I would like to try the heater resistor swap on my ms9 to
Hitatchi 25” ( normally paired with toei ). Bad contrast / dim picture ,
Is it this large resister
Behind the pillow cap ?
Gold, gold , purple , white , gold
( I’m reading them bands In revers and first to bands no visable in pic )
I would like to try the heater resistor swap on my ms9 to
Hitatchi 25” ( normally paired with toei ). Bad contrast / dim picture ,
Is it this large resister
Behind the pillow cap ?
Gold, gold , purple , white , gold
( I’m reading them bands In revers and first to bands no visable in pic )
Retroman839
Senior Member
Pardon the interjection 😁
I would like to try the heater resistor swap on my ms9 to
Hitatchi 25” ( normally paired with toei )
View attachment 35737
Is it this large resister
View attachment 35738
Behind the pillow cap ?
Gold, gold , purple , white , gold
( I’m reading them bands In revers and first to bands no visable in pic
I would like to try the heater resistor swap on my ms9 to
Hitatchi 25” ( normally paired with toei )
View attachment 35737
Is it this large resister
View attachment 35738
Behind the pillow cap ?
Gold, gold , purple , white , gold
( I’m reading them bands In revers and first to bands no visable in pic
jerryspaghetti
Active member
Is yours definitely MS9 because we're using the same Hitachi tube so its strange that it's not doing the same as mine (nice picture but too narrow)?
Yours is actually doing what my MS8-29 chassis did on the Hitachi tube so maybe your chassis is MS8?
You got a pic of the yoke header pin sockets on the Chassis? I believe the MS9 has them split into two seperate plugs whereas the MS8 has them all together on a 4 pin plug (I think!)
Yours is actually doing what my MS8-29 chassis did on the Hitachi tube so maybe your chassis is MS8?
You got a pic of the yoke header pin sockets on the Chassis? I believe the MS9 has them split into two seperate plugs whereas the MS8 has them all together on a 4 pin plug (I think!)
jerryspaghetti
Active member
The heater resistor is at R532 on MS9. So almost certainly the same position on MS8
Retroman839
Senior Member
yeh this ms8
Retroman839
Senior Member
G2 ?