This is not a polarized connection and polarity is not important. Be sure to turn the trimmer down on the sub-logic board to about the 9 O'Clock position.Ģ- The back light is directly driven from Connect the -30vdc supply from the radio to display pin 12 via 2k 1/2 watt resistor. Very stable, the current requirement at display pin 13 is only a few MA
#Icom 756 pro ii blog install#
This has been the easiest display to install to date, but availability seems to now be an issue.
#Icom 756 pro ii blog mods#
Stanley display found by Rick K4PQ is by far the easiest to installĮlectrically (no back light mods required and seems to be tempĬompensated in some other way). WG320240D-TML-TZ# instead of the WG320240D-TMI-TZ#, it is more easilyĪPlus Displays: AG320240D-TTI-TZ# seems to be the same as the Winstar display Like a nice antenna to radiate processor noise to the rest of your rig,Īnd I found 100pf seems to be adequate to resolve the issue.ĥ- If you plan to buy a Winstar display, try to locate the Wire to make the connection, install a 100pf capacitor across the highĪnd low connections to the pot. When mounting the pot somewhere that requires a few inches of I found the lower LH side of the cabinet (just below the handle) to be a good, easy-to-reach location for this. An internal pot is fine, but I like to be able to adjust Reached, as contrast is somewhat subjective and based partially on the Pot as close to the display as possible, leads short.ģ- I prefer to have the contrast adjustment where it can be easily Reference the temperature compensated internal -25vdc supply of theĭisplay, and I've found the contrast to be perfectly stable. To pin 14, and wiper to pin 13 allows the display contrast input to Installing a linear potentiometer of 15k, high side to pin 12, low side Temp compensation, thus causing the contrast "drift" or instability. The display is temperature compensated and it varies the -25vdcĢ- When driving display pin 13 from the radio, it ignores the display's The -30vdc from the radio pin 2 should not be connected to theĭisplay. After working with the mfg, Iġ- The display generates it's own -25vdc and outputs it to pin displayġ2. It seemed to be a thermalĭrift of some sort in that circuit. Radio menu and readjust the contrast setting. It works, but over the period of an hour or so, one has to go into the
Input (display pin 13) from the 756 contrast output (DV0, radio pin 1).
If you damage something while trying this, don't blame me.these are only notes I've posted from several installations I've done, and feedback from others who have done the same. I'll probably add to / edit this blog as I continue to test & install more displays.
#Icom 756 pro ii blog archive#
This is an attempt to archive info & notes from myself and others about different displays used. The displays in these radios haven't been supported by Icom in several years. This blog is about replacing the LCD display in a Icom IC-756 classic. The display has a more brilliant color than this, my phone cam just doesn't do it justice!
0 kommentar(er)
