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#1
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never been able to get a new 39 keypad
had mine since it first came on the market & have to do the 'rf screening' tip about once a year. as for the 800m mod you have already seen the diode row below the keypad. here is the mod PRO-39 Radio Shack Pro 39 TOOLS NEEDED: Fine-tipped soldering iron, desoldering wick, small Philips screwdriver, long-nosed pliers, rosin-core solder. (1) [Turn off your radio. Removing the batteries when the radio is ON can erase the memory! ] Remove the battery door, holder and [battery pack] from the bottom of the radio. (2) Remove the four screws from the back of the scanner and carefully lift the back off. (3) Unplug the two wiring harnesses at their connectors and remove the six bright colored screws that hold the circuit board in place. Unsolder the ground wire from the lower right corner of the circuit board. Unsolder the two wire connections from the BNC antenna connector at the board. Carefully lift the board (grasping it near the Molex connector) and set it aside. (4) Remove the two bright colored screws from the next circuit board. Carefully unplug the two-wire connector [and remove the board, as I recall]. Unsolder and lift the rectangular metal shield exposing the diodes. (5) Carefully unsolder and remove diode D6 only; this will restore the missing cellular frequencies which can be searched in appropriate 30 kHz steps. This completes the cellular restoration. Reverse all procedures to reassemble the radio and test it by entering any frequency between 869-894 MHz. [If you are as lucky as I was, the memory will still contain your other frequencies! ] Curious about the other diodes? D4 would enable 68-88 MHz coverage, but deletes 30-54 MHz; D5 (present) allows 800 MHz band operation; and D7 would make cellular spacing 12.5 kHz (incorrect). mike UK "Scanman" wrote in message ... ok, here is a question. my keypad quit working on a pro 39. i tried to clean the tips off a little on the keys themselves. then i used a pencil eraser on the pc board to clean it off the contacts a bit. i had seen somewhere, that was good to do. is it? when i tried my scanner again, most of the buttons work, but like 3 of them. 3 that had worked before! did the eraser cause harm? how can i counteract that? as to the key pad, i've been checking this thread out, so will follow along with the tips as shown. btw, was told i can't get parts even keypad for the pro 39 as it is able to be modified to cell and some stupid law prevents the shack from selling parts or repair manuals for those types of scanners. is that radio shack bs or what? tia.... scanman --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.560 / Virus Database: 352 - Release Date: 08/01/2004 |
#2
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"mike" wrote in message
... never been able to get a new 39 keypad had mine since it first came on the market & have to do the 'rf screening' tip about once a year. as for the 800m mod you have already seen the diode row below the keypad. here is the mod PRO-39 thanks for the information. i've never done the mod yet. if the unit isn't going to work, i'm not going to bother with it. i'm wondering since cell is going digital now, if they'll loosen their grip on the philosophy of not selling parts and service manuals for those types of scanners. so far as i'm aware, scanners like the 39 and those in that era aren't able to receive the digital cell calls, so i can't see where the problem would be. sm |
#3
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That's BS man, Pro 43 can get cells and as you read above you can get parts!
Get the Ahole to quote you that law! Get thee to another Shack ! The part number is 10789824, I think. You don't need to un-solder that diode if getting in there with heat scares you off, you can just x-acto knife carefully where the diode meets the PCB, can't use it anywhere else but who cares? "Scanman" wrote in message ... "mike" wrote in message ... never been able to get a new 39 keypad had mine since it first came on the market & have to do the 'rf screening' tip about once a year. as for the 800m mod you have already seen the diode row below the keypad. here is the mod PRO-39 thanks for the information. i've never done the mod yet. if the unit isn't going to work, i'm not going to bother with it. i'm wondering since cell is going digital now, if they'll loosen their grip on the philosophy of not selling parts and service manuals for those types of scanners. so far as i'm aware, scanners like the 39 and those in that era aren't able to receive the digital cell calls, so i can't see where the problem would be. sm |
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