DF 1766 faulty PSU repair
2,533 views · Published 6 July 2015 · 6:05 · Indexed 6 November 2026
Channel: RODALCO2007 · 2015 · Science & Technology
Fault analyses an repair of a 25 Amp DC supply. Type DF 1766 Origin China Findings: Massive voltage drop when loaded by more then 2 Amps. Two reversed wired 2 N3055 transistors and 3 expired 2N3055's. Faulty 3.9 Volts Zener Three expired 9014 NPN transistors on control circuit board. The manufacturer kindly emailed me the schematic.
