Benq W1070 projector smps

Collapse
X
Collapse
 
  • Page of 3
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 template Next
  • tibimakai
    Badcaps Legend
    • Jan 2012
    • 3680
    • USA
    #41
    Re: Benq W1070 projector smps

    I have managed to find some spots, that I can measure on the top side of the board and none of the voltages are present, at U42. Only the 14.7V is present.
    Maybe, because the C297 it was shorted to ground, it may have damaged the IC as well? It was getting hot, when the C297 it was still on the board. I have also removed U42, and re-soldered it. I have placed an order, for new parts, but they are coming from far east.

      Comment

      • tibimakai
        Badcaps Legend
        • Jan 2012
        • 3680
        • USA
        #42
        Re: Benq W1070 projector smps

        This PMD1000, is some kind of power supply? It powers pretty much everything, in the projector?
        I can't find anything about it, online.
        I have placed an order for two of these, but it will take a while, until I will have them.

          Comment

          • tibimakai
            Badcaps Legend
            • Jan 2012
            • 3680
            • USA
            #43
            Re: Benq W1070 projector smps

            I have received the IC from China. After replacing it, the projector booted right up.
            The image it was very dull. I thought, that I need to replace the bulb, but all it needed, a good cleanup.
            All it was, this DC/DC converter(PMD1000) and a shorted smd capacitor, which it was a decoupling capacitor, at this PMD1000 IC.
            Thank you very much for your help, it is greatly appreciated.
            Attached Files

              Comment

              • R_J
                Badcaps Legend
                • Jun 2012
                • 9535
                • Canada
                #44
                Re: Benq W1070 projector smps

                Thanks for the follow up, good to here you have it working

                  Comment

                  Previous 1 2 3 template Next

                  Related Topics

                  Collapse
                  • Document Archive
                    Lenovo ThinkPad P51s + ThinkPad Stack Mobile Projector Mobile workstation P Specification for Upgrade or Repair
                    by Document Archive
                    This specification for the Lenovo ThinkPad P51s + ThinkPad Stack Mobile Projector Mobile workstation can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the P51s + ThinkPad Stack Mobile Projector boardview and P51s + ThinkPad Stack Mobile Projector schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum....
                    09-06-2024, 06:11 AM
                  • tibimakai
                    Benq W1070 projector power button blinks green
                    by tibimakai
                    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:...
                    03-15-2018, 09:22 AM
                  • bermo96
                    BenQ W1070 Projector 5v rail
                    by bermo96
                    Hi, I've a BenQ W1070 projector and the lamp isn't working, I replaced it but same problem. Then I checked the voltage inside and the 5v rail is showing 2.3V. The commands for the ballast is powered by this 5v rail. I've the schematics but I can't find any 5v regulator an the 5v isn't coming from the power supply board. Can someone help troubleshoot this ?

                    Have a nice day...
                    06-16-2019, 10:34 AM
                  • Kiks412
                    BENQ MP511 Video Projector - No Button Responce and wierd Image
                    by Kiks412
                    Hey guys, I have this Video Projector that turns on, takes a bit to give some image, and when it does it displays a weird static image, and has no reaction to on-device buttons or remote whatsoever, even to turn off, only unplugging from the outlet. I'm new to this kind of device so I will be very happy to get some help with this....
                    12-20-2022, 10:00 AM
                  • dkneyle
                    Onkyo DX-V500 Laser Disc Player - weird SMPS fault
                    by dkneyle
                    This relic from a technology path that came to a dead end (but still has historical interest) was brought in with a dead SMPS, which is based around a MK1210 device. I got it going after a battle. It seems to have a strange design - if it's not getting feedback that the secondary is OK it cause the big FET to go into full conduction and overloads resulting in a blown fuse at best or something worse! I'm using a Dim Bulb Tester (70W/230V) which thankfully has saved the day a number of times whilst repairing.

                    Now, it loads a CD OK. The motor voltage output (which is built onto the SMPS...
                    02-01-2022, 02:08 AM
                  • Loading...
                  • No more items.
                  Working...