yes to much current burns the led to bright and it can burn it out quicker than an el panel ----- Original Message ----- From: "Ted Summers" <djtbs1@...> To: <emax@yahoogroups.com> Sent: Wednesday, March 30, 2011 4:24 AM Subject: Re: [emax] Re: LCD replacement from RS > My understanding is that you are putting a resistor in line with 5v > wherever you get that from to reduce it a little to decrease the > brightness. > > I didn't have to do any of that as I got exact replacements, not LEDs. > > Thx, > Ted > > On Mar 29, 2011, at 5:11 PM, mlivingston8 wrote: > > Yeah, I think that makes sense to me now. I'll have to take the emax LED > board out and look at the traces again but I do think I remember that pin > A was the hot trace from the emax board and K was the ground. So basically > I break the trace and essentially "splice" a resistor in line to bring it > down to +5v? > > Sorry, I'm slow! Going to try this one more time before send you the board > in May. > > --- In emax@yahoogroups.com, Ted Summers <djtbs1@...> wrote: >> >> Pin A and K are the anode and cathode of the backlight. >> The original EL backlight on Emax is not +5V. >> To use an LED backlight, you break the connection of the A pin on the >> display board and then connect the pad going into the display to +5V with >> a >> resistor in line to reduce the brightness (if my understanding is >> correct). >> The pot people talked about is added between a couple pins to change >> reflective angle in the event you can't see the letters or they are >> barely >> visible. >> >> Hopefully that makes some sense. >> >> Regards, >> Ted >> >> >> >> >> On Tue, Mar 29, 2011 at 8:37 AM, mlivingston8 <mlivingston8@...>wrote: >> >> > >> > >> > Call me stupid but I still don't get this procedure. One person says >> > add a >> > resistor, the other says there is no need to. Nothing is working for me >> > still. Jason, did you not have to add pin A? I took the pin A I had >> > originally soldered in out again but now the Emax will not turn on at >> > all. >> > Maybe I burnt out that surfacemount resistor? At least with pin A in >> > there I >> > got power to everything. I'm about to throw this thing off a bridge. >> > >> > --- In emax@yahoogroups.com, Jason Mc <jasonmcdougal@> wrote: >> > > >> > > Hello All, >> > > Have a look at http://groups.yahoo.com/group/emax/photos/album I just >> > posted >> > > pictures of the steps I took replacing my Emax Display. >> > > I hope this helps! >> > > >> > > On Sun, Mar 27, 2011 at 1:24 PM, mlivingston8 <mlivingston8@>wrote: >> > > >> > > > >> > > > >> > > > Yeah, I soldered in the resistor to the other jumper on the board. >> > > > Pin >> > A I >> > > > thought was implied because just moving that resistor still doesn't >> > hook it >> > > > up to anything. The pin still has to be soldered to the board to >> > > > get >> > power, >> > > > just by looking at the traces on the board and following it to the >> > > > emax >> > > > board, that was my conclusion. The steps were a but confusing which >> > > > is >> > why >> > > > I'm in this predicament as of now. >> > > > >> > > > Ted, thanks for offering your help. Just to clarify, what boards do >> > > > I >> > need >> > > > to send you? The emax LED board and the replacement newhaven LED >> > screen? Or >> > > > do you need my emax digital board as well? I'll email you to talk >> > > > compensation for your services. I hope I haven't FUBAR'd this emax >> > because >> > > > it's the last revision digital board with scsi already installed, >> > > > so it >> > is >> > > > worth the trouble. I even fitted it with internal to external >> > > > connector >> > and >> > > > have my zip drive ready to roll. Just no display :( >> > > > >> > > > >> > > > --- In emax@yahoogroups.com, "dutchbeats" <dutchbeats@> wrote: >> > > > > >> > > > > he said to solder 1 - 14 and pin k which is the led ground. don't >> > solder >> > > > the led + because you already are getting power for the screen by >> > switching >> > > > the resister on the led board from r7 to r8. please tell me you >> > soldered the >> > > > led + and jason is right :/ >> > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > --- In emax@yahoogroups.com, "mlivingston8" <mlivingston8@> >> > > > > wrote: >> > > > > > >> > > > > > I've replaced the header pins 1-14 to the new display but I'm >> > confused >> > > > on where to solder the A and K pins on the new display. I see the >> > ground and >> > > > +5 on the Emax LED board but the spacing on the new display seems a >> > > > bit >> > > > wider than the original. Do I have to solder the pins on the new >> > display and >> > > > bend them to fit the Emax board? >> > > > > > >> > > > > > --- In emax@yahoogroups.com, "jammie" <jammie.emma@> wrote: >> > > > > > > >> > > > > > > on the rack you would still need the pot as the angle on the >> > > > > > > rack >> > is >> > > > a negitive veiw angle voltage >> > > > > > > ----- Original Message ----- >> > > > > > > From: Jason Mc >> > > > > > > To: emax@yahoogroups.com >> > > > > > > Sent: Wednesday, March 16, 2011 12:05 AM >> > > > > > > Subject: [emax] Re: LCD replacement from RS >> > > > > > > >> > > > > > > >> > > > > > > >> > > > > > > Sorry about the last post gave the wrong part number, this is >> > exact >> > > > part I used. >> > > > > > > >> > > > > > > I have recently replaced my el foil display with this one: >> > > > > > > >> > > > > > > Mouser Part #: 763-NHD-0216EZ-FLYBW >> > > > > > > Manufacturer Part #: NHD-0216EZ-FL-YBW >> > > > > > > Manufacturer: Newhaven Display >> > > > > > > Description:LCD Character Display Modules STN- Y/G Transfl >> > > > > > > 85.0 x >> > > > 36.0t >> > > > > > > >> > > > > > > >> > > > >> > http://www.mouser.com/ProductDetail/Newhaven-Display/NHD-0216EZ-FL-YBW/?qs=sGAEpiMZZMt7dcPGmvnkBq9RSAvEJGmRKdDSboNhMSQ%3d >> > > > > > > >> > > > > > > $11.35 US >> > > > > > > >> > > > > > > 1) De-soldered the old header pins from the original display, >> > > > soldered >> > > > > > > them into new display. >> > > > > > > 2) Removed the old EL-Foil Driver (black box) >> > > > > > > 3) Used router and file on case to accommodate new display >> > thickness >> > > > > > > 4) De-solder surface mount resistor R7, Solder resistor in R8 >> > > > > > > location. This supply's the +5v for LED Backlight >> > > > > > > 5) Header pins 1-14 need to be in place along with pin K (LED >> > ground) >> > > > > > > >> > > > > > > Nice new low power LED BackLight display, great contrast no >> > > > > > > need >> > for >> > > > > > > added potentiometer. >> > > > > > > >> > > > > > > [Non-text portions of this message have been removed] >> > > > > > > >> > > > > > > >> > > > > > > >> > > > > > > >> > > > > > > >> > > > > > > >> > > > > > > ---------------------------------------------------------- >> > > > > > > >> > > > > > > >> > > > > > > >> > > > > > > No virus found in this incoming message. >> > > > > > > Checked by AVG - www.avg.com >> > > > > > > Version: 8.5.449 / Virus Database: 271.1.1/3508 - Release >> > > > > > > Date: >> > > > 03/15/11 07:34:00 >> > > > > > > >> > > > > > > >> > > > > > > [Non-text portions of this message have been removed] >> > > > > > > >> > > > > > >> > > > > >> > > > >> > > > >> > > > >> > > >> > > >> > > [Non-text portions of this message have been removed] >> > > >> > >> > >> > >> >> >> [Non-text portions of this message have been removed] >> > > > > > > [Non-text portions of this message have been removed] > > > > ------------------------------------ > > Emax and Emax II User's Group Website > > http://www.silveriafamily.comYahoo! Groups Links > > > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.449 / Virus Database: 271.1.1/3537 - Release Date: 03/29/11 06:34:00
Message
Re: [emax] Re: LCD replacement from RS
2011-03-30 by jammie