I have a 25" Pentranic monitor that powers up and makes a ticking sound. It sounds like a relay clicking on and off. I assume that it is in High Voltage Shutdown mode. The chassis had a broken POT on the adjustment board, VR4 H-HOLD. I have replaced the POT, but the chassis still does not power up.
I have removed the HOT, which includes the extra protection diode, and it appears to function properly with my DMM set to diode check. I have also ohmed out the yoke, with resistances of 2 ohms and 5.8 ohms. Are these the proper DC readings for this chassis?
I have also been working with a schematic labeled "Model 1127, 1527, 1532 -> CH-288 CGA". It seems that my flyback (marked MHF023-45) does not match the schematic. According to the schematic, Pins 1,2,9,10, and 11 should have continuity as should Pins 3,4,5,7,and 8. I removed my flyback and it measures continuity on Pins 1,9,10, and 12, as well as Pins 2,3,4,5, and 8. Does this mean that my flyback is bad, as Pin 2 is on the other winding? Or is my schematic wrong for this model?
Any advice on getting this chassis out of shutdown mode would be appreciated.