Sounds to me, like you're missing a "lock out" command too. Check the manual
for such a function. You're probably right about the "Mic" lock switch, if
it is as I've usually seen.
Post by Gord SHowdy Dave and thanks for the reply......at this point I've been sent a
schematic and am studying it. The current operational status of the radio
is that it has programmed frequencies and the display is in CHANNEL mode
and, as programmed, the radio transmits normally (including DTMF) and
receives normally. I can't change the display however or enter into VFO
mode. The rotary encoder works (just selects these channels). The MR or
memory recall button only functions to activate a scan of the channels (by
holding it in for >1sec). All pushbuttons indicate with a beep when
pressed (and a second beep is emitted after approx 1.5 secs if held
pressed). In reply to your questions......
Post by Dave DunfieldPer the subject line or would like to talk to anyone who is familiar with
the memory or mode control of the memory or processor in this
radio. I'm looking at a function "F" button (switch) that works (beeps
and will cause a press-time-out) but doesn't otherwise effect any control.
Sorry, no tech info, but a couple of thoughts.
The fact that it beeps indicates that the key is being scanned, and that
the microprocessor is running. When you way "Press timeout" do you
mean that the "F" indicator lights, then goes out after an appropriate time
out period of no activity.
Agreed. The "F" indicator should show a second "F" on the LCD display if
I read the basic instruction manual correct - and it doesn't. There is a
beep when I press the button, and a second one approx 1.5 secs later if
held pressed (my reference to a timer), however the display doesn't change
with any attempt at a function change.
Post by Dave DunfieldIf so, this tells us that the key is being scanned correctly (interpreted as
Function). If no "F" indicator, there may be a fault in the keyboard matrix
which is causing the key to be interpreted as something else.
Good point - will investigate.
Post by Dave DunfieldDo all of the other keys work normally? If so, and the "F" indicator is
lighting when you press Function, then it pretty much has to be a
"software" issue, the microprocessor is not acting on the key properly.
As mentioned above.....keys beep but no change can be made, no alternative
display or menu can be brought up.
Post by Dave DunfieldIf other functions don't work, then the radio could be locked - Press F
then LOCK (leftmost key iirc) to unlock it.
I'm not seeing a LOCK key except for a lock slide switch on the rear of
the mic. I doubt this does more than disable the mic keys but I tried it
with any combination I could think of - zippo.
Post by Dave DunfieldIf that't not it, try a full reset - hold MR while power-on, then release,
and when you get "all segments on" on the LCD, press MR again.
I had hoped this might work, but it doesn't.....As above, the button will
beep if pressed and cause a channel scan if pressed >1sec but otherwise
will not effect a reset when pressed in conjunction with the power on (I'm
used to having done this on other equipment). No "all segments on"
either.....just a power up to the channel display operating condition.
Post by Dave DunfieldThat should restore the radio to factory defaults (you will use you
programmed memoryies etc.).
I'm currently looking at the diagram to see where the key-pressed "beep"
comes from......thinking if it's the micropro, then it is probably
receiving the command (but may be otherwise disabled at another pin). If
external, then I've got more digging to do.
Post by Dave DunfieldGord VE1AJF
Dave VE3DRD
--
dunfield. Classic computer collection: www.classiccmp.org/dunfield
com Some stuff I have for sale: www.dunfield.com/sale