Post by jeremy on Feb 28, 2014 12:13:54 GMT -5
For those of you who have this model ViewSonic projector. Here is a fix for a completely dead, no LEDs, No power issue.
The repair needs to be done to the main power supply. This is the board that the main A/C power cord attaches to when in use. This board is located in the back of the projector, under the logic board. Once the board is removed, you must remove ALL the capacitors from the power supply and replace them with NEW low ESR capacitors. There are 9 capacitors on the power supply, their values are as follows:
450v 150uf
50v 56uf
16v 1000uf
16v 1000uf
35v 220uf
16v 680uf
25v 47uf
50v 47uf
50v 10uf
These are the capacitors that must be replaced. I recommend purchasing high quality nichicon low ESR capacitors for the repair. The capacitance ( uf or microfared) must be the exact same value as the original capacitors when replacing. The voltage must be a MINIMUM of the original value of the capacitors; higher voltage can be used, but make sure it will physically fit on the board without touching other components.
After the capacitors have been replaced the board should then be reinstalled back into the projector, the projector should be fully reassembled to test. Make sure your bulb and lamp cover are attached so the projector will power up.
Plug the projector in and it should either power up on its own with yellow LEDs lighting up first, or simply press the power button and the projector should power up and operate normally.
As a side note, your old capacitors may not even look bad, they might even read the correct capacitance when using a capacitor tester. Regardless of the original capacitors condition, you MUST replace them all to ensure a successful repair of the power supply.
Enjoy!
