Hi!
I got this broken projector yesterday.. The unit was totally dead when I got it and so I opened it. Did some tracing, and found one blown resistor (fusible or flameproof?) at the primary sife of the PSU, just before the rectrifier and caps.
There were two 10ohm, 5W resistors in series, and one of them had blown. There aren´t any model markings on the resistor, except for logo like Delta- symbol with highlight.. This resistor it is aboat 26.5mm long and
13.2mm by 9.5mm. White ceramic resistor. PCB marking is R6.
Does anyone have schematics for this projector? Needed primarily for helping me to trace possible reasons why this resistor opened... I´v already checked the rectrifier, caps and the triac that´s connected to the other pin of this resistor. The other pin of Triac is connected between Cap1 negative pole and Cap2 positive pole. Triac is ST AVS12CB, looks like it is connected like typical application in the ST datasheet. Not exactly like it, because there is a relay that bypasses resistors when closed.
So, I need schematics for the PSU unit.. Also, is it possible that the resistor broke on its own?
Sorry for my english.. TIA!
- Jiri K.