Philips mini chart recorder PM8110 modifications

[avocollector]

I bought this item recently and it appears to have been modified by Deselec Ottawa into their Troublshooter D 400 model.

I would like to know what their modifications were so it can be returned to Philips configuration. I have found the Manual and schematic for the Philips original but Deselec seem to be long gone.

Does anyone know the modifications made? pics of the unit below.

[orbanp1]

RM has the schematics.
You could compare and undo the modifications:
https://www.radiomuseum.org/r/philip...der_pm811.html

Regards, Peter

[avocollector]

Originally Posted by orbanp1

RM has the schematics.
You could compare and undo the modifications:
https://www.radiomuseum.org/r/philip...der_pm811.html

Regards, Peter

Thanks for that - already found the page but while I've got the schematic etc the actual dismantling of the unit is a bit more complex than just opening the case thanks to the mechanical side of the recorder - so if anyone knows precisely what modifications were done it would be a great help!