2006..Can light be turned off?

2006..Can light be turned off?

Post by Jay Goldbe » Fri, 01 Sep 1995 04:00:00

Can the backlight be turned off completely?

Jay

 
 
 

2006..Can light be turned off?

Post by Jim Way » Sun, 03 Sep 1995 04:00:00


Only the very latest 2006 scanner had the ability to completely turn off
the backlight. The same switch on the older 2006's (the majority of
2006's) only dimmed the display. If someone knows of a modification to
convert the dimmer switch to on/off, please post the modification to this
newsgroup and the alt.radio.scanner newsgroup.

Jim Wayda



> Hi Jay,

>    I wasn't aware of significantly different versions of the Pro-2006.  Mine
> has the catalog # 20-145A (5A3) and pressing the 'LIGHT' key toggles the back
> light on and completely off.

> Glenn

> /////////////////////////////////////////////////////////
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> /   Amateur Call:  KF5XB  -  Tactical Call: Sooner 44   /
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>  NOTE:  The opinions expressed herein are those of the
>         author and do not represent anything organic.

+-jim

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2006..Can light be turned off?

Post by Glenn Re » Sun, 03 Sep 1995 04:00:00

Hi Jay,

   I wasn't aware of significantly different versions of the Pro-2006.  Mine
has the catalog # 20-145A (5A3) and pressing the 'LIGHT' key toggles the back
light on and completely off.

Glenn

/////////////////////////////////////////////////////////
\                                                       \

\        CAP BBS sysop - 405-736-6044 (OK Wing)         \
/   Amateur Call:  KF5XB  -  Tactical Call: Sooner 44   /
\                                                       \
/             "Illegitimae non Carborundum"             /
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

 NOTE:  The opinions expressed herein are those of the
        author and do not represent anything organic.

 
 
 

2006..Can light be turned off?

Post by Robert McAda » Sun, 03 Sep 1995 04:00:00


rites:
:>
:>
:>Hi Jay,
:>
:>   I wasn't aware of significantly different versions of the Pro-2006.  Mine
:>has the catalog # 20-145A (5A3) and pressing the 'LIGHT' key toggles the back
:>light on and completely off.
:>
:>Glenn

     That is one of the differences between the 20-145 and the 20-145a. The
light switch acts as a dimmer on the older (non a) unit. On the 145-a it is
an on/off switch.

 
 
 

2006..Can light be turned off?

Post by Floyd Ada » Mon, 04 Sep 1995 04:00:00


>Can the backlight be turned off completely?
>Jay

Jay, my 2006 is also one of the newer ones that the switch turns the
light off/on.  I also own a 2004 and have replaced the display and
modified it to turn off/on like the 2006.  Both radios use the same
switch.  The circuit is pretty simple.  They switch a 47 ohm and a 150
ohm resistors in and out of the circuit to achieve the bright/dim
functions that you have on your 2006.  I checked inside my 2006 and it
does not have the 47 ohm resistor installed, so when the switch
selects the position where the 47 ohm resistor was, it does not get a
complete circuit and the light does not operate.  The removal of this
resistor will allow for a light off with the button out and a light on
with the button pressed in.  The resistor that you need to remove is
R505 on the Logic and Display board that has the LCD mounted to it.
The resistor is a very small chip resistor and the entire circuit
board that you need access to is covered by a metal shield, which has
to be removed.  This shield is soldered on several sides.  This job
will require quite a bit of soldering with both a very low and a high
powered soldering iron.  I would not attempt it unless you have some
electronic/soldering experience.  For additional information, I
recommend that you purchase the Service Manual for the 2006.  The
catalog number on the manual is 20-145/9145, but the receipt shows the
part number to be ms2000145.  It costs $7.95 at Tandy National Parts
in Ft. Worth, Tx.  Phone (817)870-5709.  I hoped this helped.  Feel
free to E-mail me direct if you have questions.  Floyd  WD5ENJ