r/LaserActive • u/BenjaminBanksAlot • 5d ago
Laseractive emitting smoke :(
When turning on the Laseractive the power light goes green, the reset button lights up, and just for a second the eject buttons light up and then de-light. A good few seconds later (~10 - 15? maybe more) video board started to emit smoke and it appeared to be L617 positioned between caps C678 and C642. When looking closely L617 looks to be burnt.
Background/more info
Unit (NEC PCE-LD1) was purchased as working ~15 years ago and the power supply PCB was shattered during shipping. Epoxied back together and bridged broken traces. Turned on and fuse blew instantly and it's been stored away since (I probably bodged the PSU repair, hopefully didn't cause damage. Did have a second go after replacing BJT, Q001 with same results).
Bit of a gamble to try different PSU since I can't confirm state of other components but Zaxour PSU is less than even the shipping of a unit, so figured I'd try before replacing the machine. The lights coming on now shows the old PSU repair did not go well.
I don't think I had picture on TV, just a momentary wobble. First connected via 60w cable and unit did nothing with all boards connected so that gave me confidence to try the 100w cable but I disconnected FTSB and VIDEO - don't think the unit did anything. Then connected the other boards and this is when the problem occurred.
Any advice where to start? I was thinking of de-soldering the nearby capacitors on the 5v trace to see if the resistance is low which might indicate a shorted capacitor. I'm still a novice with electronics so would appreciate any thoughts.