Proxima 6500x Lamp Fooling (In focus LP650) - Page 2 - diyAudio
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Old 2nd April 2012, 11:11 PM   #11
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Join Date: Apr 2012
Quote:
Originally Posted by Shaemmerling View Post
been measuring the lines on the 18 pin main cable to the motherboard and found that pins 12 and 13 are 3.3v when trying to start the bulb and drop to 3.25v when resting in between trying. a try for me is when the color wheel starts spinning again, does it 5 times before giving "lamp strike 5 times failure" error.
I meant 16 pin main cable. sry
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Old 11th April 2012, 11:07 AM   #12
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Hi
I was also trying this but accidentally burnt my ballast. I was almost on verge to crack the problem. Ballast is continuously sending signal/data to motherboard through optocoupler and keeping the motherboard on. I was trying to map this signal by oscilloscope when unfortunately small piece of wire fell on the ballast resulting in its death. If you can map that signal, please do send me its details. If we manage to generate this signal by some microcontroller, we can light up projector by led. You can listen to thiss ignal with the help of headphone. put everything back and put one headphone in series with th optocoupler sending signal to board. you will hear very faint tick tick sound which is acyually signal that carry data for motherboard and keep it on.
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Old 23rd April 2012, 11:58 AM   #13
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Default lp650

any success man?
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Old 10th May 2012, 08:57 PM   #14
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Hi,

I also recently picked up a LP650 or 6500x projector and could help you out
zziqbal. Please let me know exactly what you would need measured, I have the tools to do this, but not sure exactly what needs done.

-SR
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Old 11th May 2012, 03:53 PM   #15
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Default lp650

on ballast there is 5 pin connector socket that is used by main board to communicate with ballast. this is through optocouplers. identify the optocoupler used to send signal to main board. draw 2 parallel wires from its ballast side 2 pins and connect to oscilloscope and then switch the projector on, hope your projector has lamp and its in working order. record the digital signal on the oscilloscope till the projector has turned on. we have to simulate this signal to turn the projector on in the absence of lamp. hopw u get it. i heard this signal on headphones but when i was preparing the thing for oscilloscope, i accidentally dropped wire on ballast resulting in its death. if you can record this signal, send me its picture, i will generate this signal with the help of microprocessor and if i succeed, will send you whole trick. regards
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Old 11th May 2012, 05:32 PM   #16
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Alright, cool. There is something messed up somewhere near my color wheel (my guess) as the projector only works about 10% of the time. It will either not power on or work fine for a few minutes, and then flashes the image through the 3 hues of the color wheel, slowing down how fast it flashes between the 3 until it stops and then the projector turns off. Hopefully I can get a recording of an actual working bootup. I will have a chance to try this on monday or tuesday and will let you know.
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Old 13th May 2012, 02:42 AM   #17
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Default lp650

best of luck
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