1/29/2024 0 Comments Crown xls 802 service manual pdf![]() There could be a small chance that the drive circuit could be at fault, but this is very rare (if you have already checked the driver transistors & the current limit circuit). If NONE of the transistors are found to be faulty, then the fault must be one of the bridge rectifiers. ![]() Once the faulty transistor / transistors have been taken out, confirm that the amp powers back up and goes out of protect. Please also check the driver transistors (TIP50 / TIP47 / MJE5731A) & the current limit circuit (BC184L / BC214L & the diodes) on each channel as well as these tend to go when one or more of the output transistors blow. The best way i found to find the suspect faulty device / devices without taking all the transistors off of all the heatsinks is to measure with a meter between the casing of each transistor & the collector of that transistor, when you find the short, then you need to desolder all the PCB pads to the transistors that are connected to that specific heatsink bank and then measure each transistor in that bank to isolate which one / ones are at fault. If you have tested all the low voltage sections & they seem to work, then the fault is mostly down to one or more of the output transistors.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |