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    #21
    Re: daytek TV - kinda like 2 secs to black?

    i looked up the datasheet for A (AZ1117D) it is a 1.15v regulator which gives me upto 1.162v and im at 1.196v is this enough for concern? i even went back and double checked my measurment just now.

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      #22
      Re: daytek TV - kinda like 2 secs to black?

      Wait. PlainBill in post #16 hasn't seen the new numbers yet.
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        #23
        Re: daytek TV - kinda like 2 secs to black?

        Originally posted by scampo77 View Post
        i looked up the datasheet for A (AZ1117D) it is a 1.15v regulator which gives me upto 1.162v and im at 1.196v is this enough for concern?
        If you are looking at this datasheet



        It is an adjustable at 1.2V through 5.0V. So 1.196V is okay.
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          #24
          Re: daytek TV - kinda like 2 secs to black?

          The output of regulator E is definitely wrong. The only additional test is to check the resistance the output of E and the output of the 3.3 volt regulators. I suspect the regulator is bad, but if you get a low resistance, that would indicate that some other component is faulty.

          PlainBill
          For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

          Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

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            #25
            Re: daytek TV - kinda like 2 secs to black?

            ok ill get ordering thanks guys for bring this long dead thread back to life and getting this tv put back together.

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              #26
              Re: daytek TV - kinda like 2 secs to black?

              i am having a hard time finding the replacement regulators by the part numbers LD33 and LD18 is there another part number that they go by and what is the classification for this case? TO-???
              Last edited by scampo77; 05-28-2011, 09:21 AM.

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                #27
                Re: daytek TV - kinda like 2 secs to black?

                Originally posted by scampo77 View Post
                i am having a hard time finding the replacement regulators by the part numbers LD33 and LD18 is there another part number that they go by and what is the classification for this case? TO-???
                I search by "1.8v voltage regulator" on digikey.ca and then narrow down by package size. 1.8V is your output in the search field.

                This wiki might help you determine which packaging you need. See "Three terminal packages"

                http://en.wikipedia.org/wiki/Surface...#Package_sizes

                If you are really desperate, these are typically "jellybean" parts. If you have old junk boards like a soundcard lying around, you will likely find voltage regulators.

                If you want to buy locally, phone around ask. Brand does not really matter as long as you get the right output and package size.
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                  #28
                  Re: daytek TV - kinda like 2 secs to black?

                  Originally posted by scampo77 View Post
                  i am having a hard time finding the replacement regulators by the part numbers LD33 and LD18 is there another part number that they go by and what is the classification for this case? TO-???
                  Here's the procedure I use to locate a regulator like the AS1117-33.

                  Enter voltage regulator in the Parts Search box, hit Go

                  Select PMIC - Voltage Regulators - Linear This takes you to a page where you select various parameters.

                  Under Regulator Topology select Positive Fixed

                  Under Voltage Output select 3.3V

                  Under Number of Regulators select 1

                  Under Current Output select 1A

                  Under Mounting Type select Surface Mount

                  Now here's the tricky part. Under Supplier Device Package select SOT-223-3

                  Under Packaging select Cut Tape and press Apply filters

                  PlainBill
                  For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                  Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                  Comment

                    #29
                    Re: daytek TV - kinda like 2 secs to black?

                    i finally got my new voltage regulator and i installed it and it instantly shoots to 1.9v and the symptoms remain the same. it keeps blinking.

                    any other advice? i tried 3 additional regulators and they are all around 1.9v

                    Comment

                      #30
                      Re: daytek TV - kinda like 2 secs to black?

                      Originally posted by scampo77 View Post
                      i finally got my new voltage regulator and i installed it and it instantly shoots to 1.9v and the symptoms remain the same. it keeps blinking.

                      any other advice? i tried 3 additional regulators and they are all around 1.9v
                      That indicates a short somewhere is pulling the 1.8 power rail high.

                      PlainBill
                      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                      Comment

                        #31
                        Re: daytek TV - kinda like 2 secs to black?

                        so what should i be looking for? a cap with zero resistance or esr that is close to it? or a blown off trace?

                        also which leg of the transistor should i be following around? there is the big wide tab at the top and also the middle leg both with 1.9v
                        Last edited by scampo77; 08-08-2011, 05:43 PM.

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                          #32
                          Re: daytek TV - kinda like 2 secs to black?

                          Originally posted by scampo77 View Post
                          so what should i be looking for? a cap with zero resistance or esr that is close to it? or a blown off trace?

                          also which leg of the transistor should i be following around? there is the big wide tab at the top and also the middle leg both with 1.9v
                          Given that the voltage is too high, I would suspect a point where 1.8 and either 2.5 or 3.3 volts go. That would be one of the processor chips.

                          PlainBill
                          For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                          Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                          Comment

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