Скачать с ютуб BenQ HT2050 DLP Projector Repair | Locked Fan Causes Shutdown в хорошем качестве

BenQ HT2050 DLP Projector Repair | Locked Fan Causes Shutdown

A viewer sent this in when it started shutting down after getting too hot. An old lamp assembly had ruptured leaving a chunk of glass in the blower fan causing it to lock up. After removing the glass, the projector ran great. If you ever have a lamp explode or lose any pieces of glass in your projector, be sure to listen for bits that might have landed in the blower fan. This is a common issue among all DLP projectors and LCD projectors that use directly connected blower fans for cooling. *Note, About the fan frequency, I think the 97hz on the scope = 2 pulses per revolution on that fan. 2900rpm(target), 48.3rps(revs per second) x 2= 97hz(cycles per second). If I am wrong here, please correct me and help me understand where I was wrong. Thanks for watching and I hope you all are having a great year so far. If you need a lamp for this model go here and use code YT50 at checkout. https://www.purelandsupply.com/benq-l... \O/ 00:00 Intro - Hello! 01:46 Remove/Check Lamp 03:32 Begin Disassembly 07:55 Initial Testing 09:07 Check Service menu (Press Menu, then Enter/Source at the same time) 10:41 Final Disassembly to remove blower fan. 16:39 Examine jammed fan, remove the glass 23:03 Re-assembly begins 30:55 Check fans with DMM 34:17 Re-check fan rpm in service menu /Initial Testing 35:44 Check fan status with oscilloscope 38:57 mystery screw 40:25 Continue assembly 43:52 Plastic film unpeeling. 57:45 Final Testing 1:00:40 Cause of Problem