8719-192-L-PLCC Uniden 858 KIT INSTRUCTIONS

 

 

 

 

 

The installation of the 858 kit requires soldering.  

Radio must be in original condition, i.e., without channel mods. Clarifier mod is OK.

 

 

Presteps;

Verify radio is working properly. All modes, all channels.

 

Then remove the top and bottom covers to gain access inside the radio.

 

Figure 1.

 

 

Locate the flexible cable coming from the channel selector and going to the radio main board.

Carefully pull this cable out of the connector while gently but firmly rocking it side to side.

 

For the 858 kit’s, use the connectors labeled “979”. The 959 connectors should not be installed on 858 boards assembled after 9-19-09.

 

CAUTION! Connecting your radio to the wrong set of connectors could permanently damage your radio!!

 

 

 

 

 

We now need to unsolder the flex cable connector from the main radio board.

 

To do this we must unsolder and remove a shield that is in the way. Unsolder it at all four corners and set it aside. You will need a higher setting on your soldering iron.

DO NOT USE A GUN!!!

 

 

Once you have removed the shield, unsolder and remove the connector.

 

 

 

 

You will need to attach the Channel Selector end of the J1a cable to this connector. See example below.

 

Now, we need to isolate pin 19 from the ground plane. This requires cutting the copper foil away from the pin. I recommend a Dremel with a tiny burr bit to do this with, but a razor blade will suffice..

 

 

 

 

 

 

 

Next you will install the main radio connector into the radio. Take note of the silver mark. It goes towards the side of the radio.

 

 

 

Once you have this soldered in place, solder the designated wire from harness C2-J3A to pin 19 on the top of the PLL IC.

 

Next, Solder the Flex Cable connector to the J1a Channel Selector end of the Harness connector.

insert the flex cable into the channel selector end of harness connector C1-J1A. Be careful to insert it the correct way. The exposed contacts must be toward the contacts in the connector.

 

 

You can use electrical tape or Hot Glue to ensure the cables do not separate as well as to electrically insulate the exposed connections.

 

Here are a couple of pictures showing the correct harness connections. Note the orientation of the board.

 

 

 

Mount the board in a convenient location.

Mount the switches in a location of your choosing.

 

Next, on the bottom of the board, broadband the radio by making the changes noted to L37.

 

 

 

Isolate the center pins as shown.

Connect the outside pins as shown.

You will need to adjust this coil for an even spread from top to bottom.

 

 

Lastly, re-install the shield you removed to gain access to the Flex cable connector solder.

 

Special notes.

On LOW RANGE, band 1, channels 1 & 2 do not produce an output from the PLL. Logical addresses 0 &1 are reserved by the manufacturer as the location of the chip i.d., chip manufacturer and related info. It will produce an illegal output code when these addresses are selected.

 

The Range changes between channel 7 and 8 on band 3.  So to get to the next frequency in sequence, you will need to switch to HIGH RANGE on channel 8, band 3. And vice versa going down.

 

Power up the radio and test coverage from top to bottom.

 

If all is well, re-install your covers and enjoy your work!