MS9 Curve

[VS_Lilith]

Our shop sold a NAC with an MS9 in it and the customer wanted it rotated to put a 60 in 1 for the time being. After I rotated it though, the monitor developed a large bend on the top right, is this interference with the speaker at the top? Or is there a way I can adjust this on the chassis? Thanks!

 

[nem]

SPC15 on the chassis. It's easily adjusted now that the monitor is rotated. Just open the service door and look for the pots on the bottom side of the chassis.

 

[VS_Lilith]

SPC15 on the chassis. It's easily adjusted now that the monitor is rotated. Just open the service door and look for the pots on the bottom side of the chassis.

Perfect I'll take a look next I'm in thanks!

 

[VS_Lilith]

Perfect, that fixed that really bad curve on the edge, anyway I can fix the curves in the middle of the monitor (top and bottom)

 

[Mrhide]

Our shop sold a NAC with an MS9 in it and the customer wanted it rotated to put a 60 in 1 for the time being.

What shop sells NAC with MS9 in Ontario?

 

[VS_Lilith]

We dont have them for sale at the moment, this was the last one. Mana Pinball is our shop!

 

[nem]

Perfect, that fixed that really bad curve on the edge, anyway I can fix the curves in the middle of the monitor (top and bottom)

You should also adjust the Trap pot. You can get the left and right side more uniform with each other.

As for the curve in the middle, the chassis probably hasn't been recapped?

 

[BuddyC]

Perfect, that fixed that really bad curve on the edge, anyway I can fix the curves in the middle of the monitor (top and bottom)

I would also check that the B+ settings are correct. To low B+ will do that to your picture.

From https://gamerepair.info/hardware/35_nanao_ms9_29

B+ Voltage

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The main DC supply voltage, B+, can be checked using the TP2 test point. It is located in the center of the PCB, in the corner of the "U" shaped side of the heatsink next to the empty inductor location L505.
The correct B+ voltages are:

15KHz: +76V DC
24KHz: +119V DC