by The below was ftp'd off of oak.oakland.edu. I take no responsibility
for the following. Use the below info at your own risk!
PRO-2006 Modifications
NOTE: The Electronic Communications Privacy Act of 1986 makes it
unlawful to monitor mobile telephones, including cellular. The following
modification is intended only to restore continuous 760-1300 MHz
coverage as originally provided by the design of the PRO-2006
microprocessor.
BE SURE TO TEST YOUR PRO-2006 FULLY BEFORE ATTEMPTING THIS
MODIFICATION. ANY MODIFICATION MAY VOID YOUR WARRENTY.
824-851, 869-896 MHz Frequency Restoration
Tools Required: small Phillips screwdriver, small wire cutters.
Procedure: With the power cord unplugged, remove the two rear
cabinet screws holding the upper cover. Lift off the upper cover,
being careful not to stretch the speaker leads. Examine the inner,
right-hand-corner of the front panel to find two glass diodes, labelled
D503 (upper diode) and D502 (lower diode).
Using the clippers, very carefully snip the visible lead of the lower
diode (D502) at its bend and slightly separate the cut ends. If it is
ever necessary to send the radio back for warrenty repair, the diode
leads should be carefully resoldered.
Reassemble, plug in AC cord, turn on scanner, and press RESET.
Keyboard Beep Delete
With the top cover removed as described above, locate connector CN3,
a 15-pin connector with colored wires at the front of the main circuit
board. There are two precedures which will stop the beep tone from
being heard through the speaker; read both to decide which procedure
you want to follow.
(1) Find the center grey wire coming from CN3 and cut it midway to
disable the beep tone. You may wish to solder a resistor in series
to reduce the beep volume, a trimpot to vary the volume of the beep
tone, or a minature switch to choose between beep and no beep.
(or)
(2) Using a pair of needle-nose pliers, CAREFULLY pry the plug from CN3,
revealing a row of pins. Locate the center pin (#8) which corresponds
to the grey wire and bend it down flat, disabling the beep circuit.
Reinsert the plug. The pin may be erected again later to restore the
beep tone if desired.
This completes the restoration procedure. Reattach the cover and replace
the screws.
WARRANTY REPAIR
Should it be necessary during the first year of ownership of your new
PRO-2006 to exercise your warrenty, it should be carefully double-boxed
(as you received it) and returned to Grove Enterprises. Be sure to
include a copy of the original bill to establish warranty
privileges.
You must prepay only shipping and insurance; return shipping and
insurance to you will be paid by the dealer.
Grove Enterprises, P.O. Box 98, 140 Dogbranch Road
|> There are two diodes behind the "3" key on the keypad. Cheers,
--------
So I changed xtals again. The 16 MHz runs fine without any loss of sensitivity My favorite 2006 mod is a wired remote control (Monitoring Times Aug 91 - Bill Gary ---------
Well, I changed the crystal in my Pro34, which is the same type of Before you start anything, make sure you are at a static safe Hope this helps, David ------------- alt.radio.scanner I had a few requests for this mod so I thought everyone would benefit... This is the mod for adding SSB capability to your Pro2005/2006. It is read more »
Brasstown, NC; 1-704-837-9200
===========================================================================
Date: Tue, 27 Oct 1992 18:38:46 GMT
|> Has anyone tried the Scanning Speed Mod on the PRO-2006.
|> Any side-effect? A guy from Marymac told me the mod
|> increases scanning speed significantly.
|> nvn
Clipping one restores cellular, clipping the other
increases scan speed by about 13%. I did this to my
Pro-2006 after the warranty expired and did indeed measure
a 13% scan and search speed increase. I don't think
this has had any adverse effects on the radio although
its theoretically possible that the increased scan speed
might cause the radio to miss some carriers - but this
is purly speculation on my part.
Peter
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Wed, 28 Oct 1992 01:23:09 GMT
>>There are two diodes behind the "3" key on the keypad.
>>Clipping one restores cellular, clipping the other
>>increases scan speed by about 13%. I did this to my
>What about the crystal mod. The Pro-2004 and Pro-2005 could be revved up
>with a faster crystal. According to the Scanner Mod Handbook #2 (by Bill
>Cheek), it is theoretically possible to increase the Pro-2006 in the same
>manner, although he warns that he hasn't personally tried it. Since it
>already scans *much* faster than the 2004/5 (Hyperscan) with a 12 MHz
>crystal, he cautions that it may or may not work. HAS ANYONE TRIED A
>CRYSTAL FASTER THAN 12 MHZ IN THE PRO-2006?
cordless phone (no bull), and I got a big speed increase (approx. 46 channels
per second). I tried several different crystals, ranging from 16MHz to 39MHz,
and my results seem to indicate that the highest crystal freq. should be about
18 MHz. If the crystal is too fast, the 2006 just uses the 3rd harmonic (ie
a 39MHz crystal operates like a 13Mhz.)
Well gang, right after I got my Mod handbook 2, I tore into my 2006. At first I
>>faster; however, the author, Bill Cheek, says he hasn't actually tried it. I
>>haven't either, although I'd be interested in knowing if it is a successful
>>mod.
tried a 20 MHz xtal, the processor locked up and not all the LCD display
segments were happy (I had already done the diode clip speed mod). So I tried
an 18 MHz xtal, same problems. I contacted Cheek (the author) and he reported
that 16 MHz was the safe upper limit as he had seen no lockups at that speed
and higher speeds had produced lockups on SOME units.
and I find enough delay left to still be able to use it (a faster
microprocessor xtal shortens delay time).
Cheek). I added a few extra parts and can control the following functions from
a six foot detachable cord: Scan, Manual, Search up, and Search down. Searching
is a snap when you can't reach the keyboard or it is dark.
Subject: RE: PRO-2006 Scanning Speed Mod.
crystal and harder to get to than the 2006; however, I haven't changed
the 2006 crystal yet. Some of the following instructions come from the
Scanner Mod Handbook Vol. 2 on removing the logic board. Please read it
all before doing anything. If you royally***up your scanner, IT IS
NOT MY FAULT!!!!!
workstation. Unplug the A/C power cord. Remove the top and bottom
covers. Remove the 4 countersunk machine screws from thesides of the
front panel, then gently pull the panel away from the main chassis. All
wires and cables will have to be disconnected from the top and bottom
of the logic board (the board that the crystal is on). This will cause
your memory channels to be lost and you will have to reprogram them
:-( (If you can work around it, you could leave CN-3, a 15 wire
connector, connected to save your memories). At this point you may have
to desolder a ground wire from the chasses going to the bottom of the
logic board metal shield. Next, remove 6 small screws that secure the
logic board to the front panel. Then, face the inside of the front
panel placed in an upright position and locate the white 13-pin
connector (CN-501) at the upper left corner of the board. This
connector doesn't have any wires, just metal pins going into it. Gently
pry this connector apart with a small flat blade screwdriver and the
board should slip away from the plastic front panel and come loose in
your hand. Also, you may need to remove the volume and squelch knobs.
Desolder the metal shield at six places around the logic board and lift
it up and off the board. This is fairly easy to do with a low wattage
soldering iron. Apply pressure with your fingers while the shield is
heated at each leg. As the solder melts, that leg of the shield will
slip upward and pop free. Now there are two choices. If you have an air
sucking soldering iron, you can procede to desolder each of the three
leads. If you have a normal iron, this will be impossible. The
remaining choice is to crush the crystal with a pair of needle-nose
pliars until only three leads remain sticking up off the board. Then
you can heat and remove each of the three leads. The center lead is
ground. You will only use the outer two leads when installing the new
crystal. It would be a good idea to insulate the body of the crystal
with shrink tubing (whatever you do, don't use electrical tape!) to
avoid it shorting out to another component. The crystal will have to be
bent over so that the metal shield can fit back on top of the logic
board. Before you completely hook everything back together, get the
scanner in a usable state and make sure it works. It would be a real
bummer to tear it all apart because something is wrong.
Subject: Pro2005/6 SSB MOD HERE!
Date: Mon, 31 May 1993 18:04:59 GMT
taken in part from Bill Cheek's Scanner Mod Handbook Volume 1. As long
as you have a shortwave receiver with an external antenna jack and
capability to tune to 455 KHz, you can interface it to the Pro2006 with
this mod. It is best if you use a static safe work environment to
perform this mod and you
...