I believe the answer to be yes. It would overwrite the parameters, so any
problems in the saved configuration would be restored. Of course, so would all
the valid parameters.
73!
Jack, W6FB
> On Apr 14, 2020, at 4:40 PM, Andy Durbin wrote:
>
> Hi Jack,
>
> Just for future reference - Does
Hi Jack,
Just for future reference - Does loading a previously saved config file
restore all settings that were reset by powering up with EDIT pressed?
Thanks and 73,
Andy, k3wyc
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Home:
"At 100 the LCD segments will be shown as grey, but the value should be
readable, although it may be difficult to distinguish the exact segments that
should be illuminated. There is not much contrast between the grey segments and
the black ones."
While I was experimenting with contrast
Andy; Your analysis was correct. Somehow the LCD ADJ value became set to 100.
KD5SPX was able to resolve the issue by figuring out the exact keypresses
needed to access the menu setting and lower the value.
The range of the value is 0 to 100, with the default being 30. This value sets
the duty
Given that the "test pattern" may be caused by an extreme LCD contrast setting
I'd suggest checking the contrast voltage that is derived from PWM signal
VCONTRAST.Contrast voltage is available of "TP2" which is connected to LCD
pin 55 (VLCD).
The schematic shows VLCD range is 3 - 6.5 V.
There is no serial command to change the LCD ADJ setting. However, you can
reset the saved parameters by holding the EDIT button while powering up the KPA.
73,
Jack, W6FB
> On Apr 13, 2020, at 1:03 PM, Andy Durbin wrote:
>
> "All other front panel stuff works I suspect the buttons for the
"All other front panel stuff works I suspect the buttons for the menu pwr
current and temp work also but I cant tell since the lcd only shows test
pattern."
The KPA500 display will show what looks like a test pattern if menu item LCD
ADJ is set to 100. If it used to work you may have
Wayne;
What are you calling “test pattern”? There is an LCD test in the system, but
it is not available normally, and also not a settable configuration.
Give me more info and I’ll try to diagnose.
73!
Jack, W6FB
> On Apr 13, 2020, at 12:30 PM, Wayne Suite wrote:
>
> The lcd on the kpa 500
The lcd on the kpa 500 shows onlty test pattrrn except when I upgraded the
firmware to version 1.54 from ver 1.38 today during the upgrade the lcu
showed Mcu Load like it is suposed to do. When done the unit restarted and
the damn test pattern is back all the time.
Prior to upgrading thr firmware
傳送日期︰ 2016年06月14日 (週二) 1:20 AM
主題︰ [Elecraft] KPA500 LCD-Display mysterious failure
Dear Elecraft-list,
today I powered my KPA500 #1584 up and got no display on the KPA500. The
backlight is working properly but the LCD shows nothing.
The Amp is working OK, it communicates with the KPA500
Dear Elecraft-list,
today I powered my KPA500 #1584 up and got no display on the KPA500. The
backlight is working properly but the LCD shows nothing.
The Amp is working OK, it communicates with the KPA500 Remote utility, it
communicates with the K3 and does 500 W Output as before. Only the
Hi Group,
Just getting to know my KPA500 which I finished assembling yesterday. What a
great amp.
I've noticed that when I turn on the rear power switch, the LCD backlight
blinks on for a fraction of a second, then turns off and stays off until you
hit the front ON switch.
Is this blinking
Hi John,
Had mine for a year. It blinks also.
73, George NC5G
VK7JB wrote
Hi Group,
Just getting to know my KPA500 which I finished assembling yesterday. What
a great amp.
I've noticed that when I turn on the rear power switch, the LCD backlight
blinks on for a fraction of a second,
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