Hello, on my Danica TPS20 (with analog Voltage/Amp display) the 5 Volt dc is working ok. The adjustable 0-10 Voltage and 0-30 Voltage both gives an pernament output of - 0,53 volts. Does someone has any idee what this could be. I don't have an maintenance cirquit drawing). The transformer (ac) power is ok. Thanks, regards, Henk