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Revision Lenco L 85        3 / 5


While replacing the cap’s I could see on the solder side the production date of the electronics: 05.02.72. The electronics here were installed in the first series of the L 85. Later series were produced with a plug-in version which greatly simplified a repair. Both electronics are fully compatible.


For safety reasons, I replaced the 2'200 μF electrolytic capacitor in the power supply with a 35 V version. When the fine regulation is switched off, the unstabilized DC voltage rises to approx. 28 V!

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Before the electronics is assembled, it is worth examining the print for bad solder joints. In order not to disassembled the electronics a second time I also checked the 3 power transistors for short circuit or interruption. As a rule, however, the semiconductors are actually no problem and it is very rare that one of the transistors breaks down.


After installing the electronics I dedicate myself to the top of the device. After all these years, some residues have settled on the Pulley. It should be dismantled for cleaning, as dust has accumulated underneath.

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