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585disp [2007/05/20 20:44] (current)
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 +====== Paragon Display Fault Fix ======
 +**From the Ten-Tec Reflector November 23, 2001**
  
 +My Paragon has developed a fault with the display: all segments of all digits are alight! I can see a slight change of brilliance in the segments of the first few digits as I change the tuning. The receiver functions normally but I haven'​t tried the TX.)
 +
 +If anybody could tell me what could cause this fault I'd be very grateful. My guess is that it must be on the Display Control Board as a fault on the display board itself would be more likely to affect only half of the display.
 +
 +73\\ 
 +John, G3RHP
 +
 +----
 +**November 24, 2001**
 +
 +The problem may be capacitor C9 on the display control board, the one immediately behind the display. ​ It is part of a voltage multiplier stage used to generate the high voltage needed by the display.
 +
 +Replace that, and while you are at it, you might want to replace C8 which is used in the reset circuit of the display controller.
 +
 +A quick check would be to switch the display to low brightness. ​ Look for a 2 circuit jumper on a 4 pin jack in the middle of the display control board. ​ It will likely be positioned on the top two pins.   Move it to the bottom two pins.   IF the display works properly, you can be almost sure C9 is the culprit.
 +
 +Good luck,
 +
 +-Lee-
 +
 +----
 +My grateful thanks to Lee, WA3FIY, who pointed me at C9 on the display control board. I replaced that (and C8 whilst at it) and all is well again.
 +
 +73 to all,​\\ ​
 +John, G3RHP

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