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Old 7th Jun 2014, 3:07 pm   #6
Wendymott
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Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,782
Default Re: Marconi 2022 Generator

Well peeps.... Both issues sorted....The cause of all the leds illuminating and no functions.. The main reservoir cap C1 15000uf was open circuit. I had removed it to test its value and ESR and upon replacement, assuming the pads were Plated through holes, had not soldered the + terminal to the pcb "its on the top side", to remedy this I had to use some solder braid from the cap terminal to the nearest pcb point.

The other problem, was that the "Reverse Voltage" legend would show and no button operation or output. The Reverse voltage detector is in the RF attenuator block, 2 diodes and two resistors, the 100R measured 110R and R16 1K0 was not measurable as it broke on removal. However replacing R16 with a new one sorted out the problem...I have now both 2022's back in service.
Thanks to all that commented.
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Wendy G8BZY
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