From: rats@ihlpm.UUCP 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 Brasstown, NC; 1-704-837-9200 =============================================================================== pas@jupitercmc.ca (Peter Stokes) Date: Tue, 27 Oct 1992 18:38:46 GMT Reply-To: pas@jupiter.ic.cmc.ca Sender: usenet@venus.ic.cmc.ca (News Administrator) nguyen@aladdin.eng.hou.compaq.com (Nghia Nguyen) writes: |> |> 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 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 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. Cheers, Peter Peter A. Stokes ~~~~~~~~ pas@jupiter.ic.cmc.ca ~~~~~~~ (613) 545-2923 ~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ From: thieleke@icaen.uiowa.edu (Jeffrey Ray Thieleke) Date: Wed, 28 Oct 1992 01:23:09 GMT horak@convex.com (David Horak) writes: >pas@jupitercmc.ca (Peter Stokes) writes: >>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? Yes, I have done the Crystal mod. I used a 16.630 MHz crystal from an old 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.) -------- From: ross@novax.llnl.gov >>The Scanner Mod Handbook #2 says to replace the 12 MHz crystal with something >>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. > Well gang, right after I got my Mod handbook 2, I tore into my 2006. At first I 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. So I changed xtals again. The 16 MHz runs fine without any loss of sensitivity and I find enough delay left to still be able to use it (a faster microprocessor xtal shortens delay time). My favorite 2006 mod is a wired remote control (Monitoring Times Aug 91 - Bill 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. Gary --------- From: IN%"horak@eugene.convex.com" 7-NOV-1992 11:49:43.95 From: horak@eugene.convex.com (David Horak) Subject: RE: PRO-2006 Scanning Speed Mod. Well, I changed the crystal in my Pro34, which is the same type of 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 screw up your scanner, IT IS NOT MY FAULT!!!!! Before you start anything, make sure you are at a static safe 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. Hope this helps, David ------------- alt.radio.scanner Subject: Pro2005/6 SSB MOD HERE! From: horak@convex.com (David Horak) Date: Mon, 31 May 1993 18:04:59 GMT 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 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 should have some technical knowledge. Also, a schematic would be helpful but is not necessary. You will need the following parts: Output jack (I use a 1/8 mini earphone jack but some like a BNC. The 1/8 mono jack is easier to install because you don't have to drill as big a hole in the back of the unit) .01 uF capacitor 5 Kohm resistor (1/4 watt) 6 inches of mini coax or other shielded cable A cable to run from the 2006 to your shortwave. I use the shielded cable that has the 1/8 plug on one end and a phono plug on the other end (1992 catalog Radio Shack P/N 42-2444 works for me). The phono plug is perfect for the antenna input of my DX440 shortwave receiver. The first step is to remove the cover of the unit and drill a hole in the back of the 2006 for your 1/8 or BNC plug. (You will want to wrap some tape around the drill bit about an inch from the end to keep it from cruising right on into the electronics once it punches through the metal!) Solder the 5K resister to one end of the .01 uF cap. Solder the other end of the cap to the shielded coax wire. Solder the other end of the coax to your 1/8 phono plug (or BNC) and ground the cable at this end. Now that the cable is in place you are ready to connect it to the 455 KHz source which is D33. It is on the top circuit board near the middle left, not too far from a huge capacitor. Solder the end of the resistor to the cathode of D33. (This should be the top of the standup part) Now you can test it out before you put the cover back on to make sure you did everything correct. You should be able to tune to some local airport or CB frequency on your 2006 and receive the same thing on your shortwave (with it tuned to 455 KHz and hooked up to the 2006 of course). If you tune something on your scanner that is SSB, you should be able to switch your shortwave to SSB and tune in the signal just fine. Beware of one thing, since the 2005/6 only tunes in 5 KHz increments minimum, you may notice from time to time that the signal on your shortwave isn't real clear. It may be that you will need to tune the shortwave anywhere from 451 to 459 KHz to tune in the signal well! If you don't succeed or this description has you baffled you probably shouldn't be doing the mod in the first place. I assume no responsibility for screwups. Good luck David ============ Compiled for garfield.catt.ncsu.edu, world.std.com and other FTP servers by: Brad Steinman, N8ZRP The University of Toledo Internet: cscon0151@uoft02.utoledo.edu (131.183.1.4) stu0105@uoft01.utoledo.edu (131.183.1.2) * Member of the All-Ohio Scanner Club (OH-48-1859) * yah...