Siemens-Nixdorf MCM 2105 NTD vertical deflection collapses

[teslacap]

Hallo,

is anybody experienced with the Siemens-Nixdorf huge crt-monitors? Here the vertical deflection collapses until there is only a horizontal white line visible. Sometimes the screen appears, for 1-2s, then collapsing again. I got a schematic from the MCM 21T1 Series, where is an IC702 responsible for the vertical deflection. Until now I did not open the chassis, just ready for experiences of somebody here. Thank you!

[ben7]

Re: Siemens-Nixdorf MCM 2105 NTD vertical deflection collapses

Whats the part number of IC702? First thing first, we should check to see if the chip is getting the right voltage.

Could you perhaps post the schematic for us too?

[teslacap]

Re: Siemens-Nixdorf MCM 2105 NTD vertical deflection collapses

Hi ben7,

it seems that I got the wrong schematic, because haven't found an IC 701 inside this monitor. Also some transistors which are inside aren't found on the schematic. That might be for sure a different chassis. I will reply if I have found the right schematic.