I have a projector INFOCUS LP340, unfortunatelly it lacks a power supplier After a long time I finally found out which voltage is neaded to power the main board (all I need is a usual computer power supplier +3.3 +5 +12 - 7V). My problem is how to start the main board. I've managed to do it a couple of times,however accidentally.Two signals go from the main board to the supplier.One of them, immediatelly (23 ms) after powering the main board sends a signal equal to 3.3V for about 3 sec. Second signal seems not to react and is equal to 0V.To make the main board work you need to send two signals to the input of the main board with the amplitude of 3.3V. Whether the main board will work depends on the sequence of those signals. One of the input signals 3.3 starts the stepper motor with the color wheel (projector DLP)and an adequate combination of those signals makes the projector work, i.e. the fans begin to work.I have written a program in C which sends different signals to the main board- if any voltage appears on the fan ,the parameters are being saved on disc. However,although the projector starts working with a given parameter,a minute later it refuses to start with the same parameters.I,ve tried those combinations but i havent found any rule :
I've tried this :
1.
signal A _____|''''''''''''|___________
signal B __________|''''''''''''|______
random time of turning on and lasting signals A and B (0 1 0)
2.
signal A |''''''''''''''''''''''|_______
signal B __________|''''''''''''|_
A Turned on from the beginning and a random time of turning on and lasting of signal B
3.
signal B |''''''''''''''''''''''|_______
signal A __________|''''''''''''|_
B turned on from the beginning and a random time of turning on and lasting of signal A
4.
signal A _|''|____|''|____|''|____|''
signal B __|'''|__|'''|__|'''|__|'''|__|
random time of turning on and lasting of signals A and B (generator of the impulses of f)
5. And A or B from the beginning high signals and the other generates impulses with random f
If anybody knows the sequence or a way to start the projector---PLEASE HELP.This information will be udeful for people, who want to put their own lamp(much cheaper from the original one)into the projector and cheat the projector.
I mean the projector (projectors) of that brand- I used to have a NEC projector- I only had to connect one signal to the supplier and the other one to groun. Here it's a bit more difficult.
I've tried this :
1.
signal A _____|''''''''''''|___________
signal B __________|''''''''''''|______
random time of turning on and lasting signals A and B (0 1 0)
2.
signal A |''''''''''''''''''''''|_______
signal B __________|''''''''''''|_
A Turned on from the beginning and a random time of turning on and lasting of signal B
3.
signal B |''''''''''''''''''''''|_______
signal A __________|''''''''''''|_
B turned on from the beginning and a random time of turning on and lasting of signal A
4.
signal A _|''|____|''|____|''|____|''
signal B __|'''|__|'''|__|'''|__|'''|__|
random time of turning on and lasting of signals A and B (generator of the impulses of f)
5. And A or B from the beginning high signals and the other generates impulses with random f
If anybody knows the sequence or a way to start the projector---PLEASE HELP.This information will be udeful for people, who want to put their own lamp(much cheaper from the original one)into the projector and cheat the projector.
I mean the projector (projectors) of that brand- I used to have a NEC projector- I only had to connect one signal to the supplier and the other one to groun. Here it's a bit more difficult.