Heidenhain TNC 124 service manual needed

Gentlemen,

I am trying to repair an old TNC 124 control unit. It powers up with a overheat error.

Somebody replaced the fan under the control PCB (perhaps maintenance) and did not fix the problem.

I am looking for the thermal measuring circuit.

Thank You :)

I was able to repair this unit, the repair folks at Heidenhain explained that the unit was no longer repairable, but gave me a few tips, It came down to the power supply for the regulated -12 volt and -15 volt missing the supply B+. There are (3) 470 uf caps that leaked slightly on the PCB, and cause enough corrision to disconnect the supply from both regulators.

Gentlemen,

I am trying to repair an old TNC 124 control unit. It powers up with a overheat error.

Somebody replaced the fan under the control PCB (perhaps maintenance) and did not fix the problem.

I am looking for the thermal measuring circuit.

Thank You :)

Quote:

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Originally Posted by MarcoCabezas

Gentlemen,

I am trying to repair an old TNC 124 control unit. It powers up with a overheat error.

Somebody replaced the fan under the control PCB (perhaps maintenance) and did not fix the problem.

I am looking for the thermal measuring circuit.

Thank You :)

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Hi Marco
I’m also looking for the service manual and the software PLC.exe and PLCmon.exe for the TNC 124.
Did you have any luck.
Please share the link if possible.
Thanks.