I have a circuit board from Japan produced in 1999, which has two glass encapsulated diodes with silk screen printing of QY10 or QY1O. I didn't understand the alphabetical order of the silk screen printing. The silk screen on the circuit board is labeled as D10 and D11. The multimeter diode cannot conduct in the forward direction when measured in gear, and there is a 0.598V voltage drop in the reverse direction. Both are the same. I need help identifying what kind of diodes they are, whether they are damaged or what I should replace them with. I checked their wiring connections, and one of them provides positive power to lt1007, while the other provides negative power. Once again, I earnestly request everyone's help!