I have got this projector for free. The only symptom, that I can see is, when I plug in the AC cord, the power button starts blinking like every two seconds, continuously. Power, Lamp and Temp LEDs do not turn on. Previous owner thinks, that is a bad transformer. I'm not convinced about that. I have took it apart, inspected the power supply and ballast driver and did not see anything obviously bad. At elektrotanya, is available the SM(schematics): elektrotanya.com/benq_w1070_w1080st_ver.00a_level3.pdf/download.html Here it is, the level 2 SM: www.scribd.com/doc/208363905/Benq-W-1070-Service-Manual This is the first time, that I'm trying to diagnose a projector(not counting the Epson 3020e). I have managed to measure some voltages, CN603: 174V(at 380V plug/ page. #18), at CN701: 12.65V, 3.3V(page #19). I did not take pictures yet, but this is my ballast driver: www.aliexpress.com/item/USED-LAMP-BALLAST-DRIVER-FOR-BENQ-W1070-W1070-W1080-W1080ST-PROJECTOR/32824953859.html?spm=2114.search0126.96.36.1993f1e297vCvQe&ws_ab_test=searchweb0_0,searchweb201602_1_10152_10065_10151_10344_10068_10130_10324_10342_10547_10325_10343_10546_10340_10548_10341_10545_10084_10083_10618_10307_5711211_10313_10059_10534_100031_10103_10627_10626_10624_10623_10622_5722411_10621_10620_10810_10811_5711311,searchweb201603_2,ppcSwitch_4&algo_expid=57655dc7-8873-4de0-80df-45421ee9f2fb-12&algo_pvid=57655dc7-8873-4de0-80df-45421ee9f2fb&transAbTest=ae803_5&priceBeautifyAB=0 Any help, would be greatly appreciated.
I have injected lower voltage, 8.5V instead of 12V, with a 5A power supply, maxed out. I have found that PMD1000 IC, it was heating up quite a lot. Also, C297 capacitor as well, which is on the other side of the board. The capacitor, it was shorting out the circuit. After I have replaced the capacitor, the 12V rail it was OK. The projector still did not turn on, though. But at least, the power button turned solid green and the power LED turned on red. After measuring the PMD1000 IC, nothing comes out of it. It receives the 12V, but there are no voltages, at any of the outputs. I have ordered a new(2) one, and now I'm in the waiting stage.
Last Edit: May 1, 2018 10:19:26 GMT -5 by tibimakai
I have replaced PDM1000 IC, and it booted right up. Did a bit of maintenance, and picture is very crisp. The image was very dull, I thought, that it needs a new bulb, it was that dirty. So it was a shorted de-coupling capacitor and a DC/DC converter IC.
Thanks. It would be even nicer, if we could figure out, that Epson 3020. I'm still looking for a remote, but my Logitech Touch, has all the switches in it and I could not correct the image, from 3D to 2D. Here are some pictures, with the bad parts.
Last Edit: May 7, 2018 14:44:31 GMT -5 by tibimakai
analogrocks: Those are pretty pictures! Set one up running a ps1 or NES and sell them as retro gaming projectors. OR post them to me. Just put the stamps in the corner. Should make it just fine
Aug 28, 2020 16:28:01 GMT -5
iwwy1969: Hi all. Nice forum. I have Onkyo TX-NR616 no sound and no usb access. I have 5v at usb. I found that oscillator close to DSP is not working. It has no voltage feed from DSP. During the testing through display DSP shows version D??? .
Jul 13, 2020 8:25:33 GMT -5
lfcfan: Hi Todd, have been reading endlessly about the topic, and I really don't think that I'll be capable to 1. do the job myself as I don't have enough of the right equipment, and it looks like only the people who have access to TI exclusive distribution networ
Apr 9, 2020 17:17:06 GMT -5
skydronelink: Thank you I advance
Jan 29, 2020 4:01:41 GMT -5
skydronelink: Hi Repairaj, I have the same issue, but I am not able to get the cap value, I can tell it is the same board but deffirent rev cause of the side CAP is not the same value ! any idea how I can get the right burnt cap value?
Jan 29, 2020 4:01:31 GMT -5
skydronelink: Hello Jerme, thank you for the those images, is there is any chance to get the C2 (Cap) value or an image for it ? Thank you in advance.
Jan 27, 2020 23:15:06 GMT -5
skydronelink: Hello Sergio, I have the same issue, but I am not able to get the cap value, did find out what is the cap value?
Jan 26, 2020 18:01:17 GMT -5