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1972 Dual Trace Dumont 2100 Oscilloscope Schematic/Manual

Discussion in 'Troubleshooting and Repair' started by TexRedNk, Jul 20, 2021.

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  1. TexRedNk


    Jul 20, 2021
    Howdy all oldtimers!!
    I have a model Dumont 2100 Oscilloscope where one of the traces is "off screen" and the vertical balance control will not bring it back up. This ia a vintage 'scope that works to 10 Mhz which serves most of my needs. I am looking for a schematic or the service manual in PDF format.
    There is one of these 'scopes for sale on eBay. Seller is # 114586205170 and you can find a great
    picture of the controls. I have searched many sites and have come up empty. Any suggestions are greatly appreciated.
    73s, Doug
    Dumont 2100.jpg


    Dec 19, 2019
    Hi Doug. May I suggest that you clean all switches and controls with contact cleaner before doing anything. Not just the ones on the front panel but any internal trimmer pots too. Use a pencil to mark their position, spray and turn them back and forth a few times.
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