EIKI LC-XB21B / Sanyo PLC-XW57 lamp ballast did not ignite HID lamp. Projector did not give any warning with LEDs, just 3 times try to start and then cool down lamp and goes to standby.
I find on ballast board 2 diodes are dead. They are in series and together parallel to output, middle point is used for ignition transformer primary (or secondary) side supply. Probably, as I not had schematic. Ballast is Rubicon RPB-7491EA, PCB is D7491M-03.
What parameters must have replacement diodes? Marking on diode is 83A, D5 on image.
I find on ballast board 2 diodes are dead. They are in series and together parallel to output, middle point is used for ignition transformer primary (or secondary) side supply. Probably, as I not had schematic. Ballast is Rubicon RPB-7491EA, PCB is D7491M-03.
What parameters must have replacement diodes? Marking on diode is 83A, D5 on image.
