Super stadium machine

[mark505]

Hello, I do not know if my messages are getting sent. My Facebook account name is Mark Sam.
My issues is with my Super stadium machine. I was able to get it to power partially up, but it seems power is only getting to the control board. I have the leds light up except for 2,6 and 9. Also there is no power to the rest of the unit. Even when I take the power board off the unit and power it directly with 24V AC, the same LEDs stay off. Any help would be appreciated.

Thank you

Mark

[takethecastle57]

Hello, I do not know if my messages are getting sent. My Facebook account name is Mark Sam.
My issues is with my Super stadium machine. I was able to get it to power partially up, but it seems power is only getting to the control board. I have the leds light up except for 2,6 and 9. Also there is no power to the rest of the unit. Even when I take the power board off the unit and power it directly with 24V AC, the same LEDs stay off. Any help would be appreciated.

Thank you

Mark

and ginger snap cookies

[takethecastle57]

Nice ,Clear Photos of the machine and the area's in question can really help us help you just post them on this thread the instructions for how to do that are on this forum.

[MrGneiss]

WELCOME!!!

[mark505]

1. Super Stadium Front View.jpg

[Drunkenclam]

Have you checked the fuses inside the power supply? Oh i see thats written in the picture.

did you check the voltage at each fuse?

[takethecastle57]

How does the Back of the power supply board look ? I.e. burnt circuit runs and such.

[mark505]

8. Super Stadium - Power Board Back View.jpg9. Super Stadium - Power Board Fuse Voltage.jpg

[mark505]

The back of the power board is clean. I do not see any damage. I measured the voltage from the bridge to the fuses. I am getting Fuse 10 - 32VDC, Fuse 9 - 0 VDC, Fuse 8 - 5VDC, Fuse 7 - 5 VDC, Fuse 6 - 0 VDC, Fuse 5 - 21 VDC, Fuse 4 - 32 VDC, Fuse 3 - 32 VDC, Fuse 2 - 0VDC, Fuse 1 - 5 VDC

Any ideas?

[Moparformances]

Im more of a vintage kinda guy

but wanted to say

Welcome to Pachitalk

[takethecastle57]

One of the power transistors on the heat sink burnt out ?


If someone here could take measurements from their good operating Sankyo Lumina Frame Power supply then we could have a solid base to go from .

[Drunkenclam]

Is it in the manual?

Do all the fuses without voltage come from the same feed?

I have a desktop case. I’ll try to check later. As all lumina machines still packed away.

[mark505]

I read in other posts about a Z1 diode.
Does anyone know where I should look for this thing.
I see a component marked Z2, but it looks fine.

[mark505]

20221029_083443.jpg

[Drunkenclam]

The Z1 normally blows if someone plugged the machine in without a step down transfomer.
Blows, explodes. same thing.

[mark505]

I suspect this is what happened. But I can not find a component named Z1. I see this thing that is Z2, I also see 2 other components that might be also Z2 but I can not read the identification because of the orientation. Can anyone show me what a Z1 component looks like and where I should look for it on the board?

[Drunkenclam]

Its the VRD1 located above the capasitor next to the reset button.

[mark505]

Thank you for the direction. I measured the component at VRD1 and got 2.256 VDC going both ways.... I switched the probe location and got the same measurement. From what I read I believe this means it got burnt in the open position. There is no marking on the component on VRD1 that I can read. Anyone know what I am supposed to replace this thing with?

[takethecastle57]

I know that Z on the component could mean a Zener Diode

https://en.m.wikipedia.org/wiki/Zener_diode

[Drunkenclam]

It can be removed altogether. But then you do loss any further protection. But should be ok for a quick test.

although I always thought if it was faulty. The main input fuse would blow and the machine would be fully dead.