what you need for this install · that board with the tx led you need to cut that board like this...
TRANSCRIPT
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CB40 into a PC122
What you need for this install
CB40 meant for the PC122, that has the wires hard wired into it, and not pin headers when you order your CB40
for the PC122 please state this in your order.
Double sided tape
Soldering iron
Solder
Solder sucker
Philips head screwdriver
Small cable ties
Wire cutters
Hot glue gun or heatshrink
Small file
Dermal with a small cutting disc
Container (to hold the screws and knobs from the radio)
Long nose pliers
Read this install in full first before you even attempt to do this mod, as once you have started
some of the changes your radio can’t be put back to stock, unless you have a radio as parts to
do so.
You take on the risk of fucking up and that’s all on you, the person that made this install is
not liable for your radio being a boat anchor or a paper weight.
Also if you think this is above your capabilities best you get a tech, someone like Ray from
Razor radios in queensland ???.
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Start by removing the 8 screws from the top and bottom covers, then remove the knobs, if you use a flat head screw drive
to remove them use a hard piece of cardboard to use on the bezel so when you pry off the knobs so you don’t damage
the bezel of the insert.
After you remove the covers and de solder the speaker.
Remove the bezel decal
I used a scalpel and found this was the best place to get it started with minimal damage
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Remove the 3 nuts that hold the bezel to the pcb boards behind it.
Then remove the 4 flat screws on each end of the bezel that hols the bezel to the frame of the radio
Once you have done that you will see a small red window it should just fall out easy if not wait till you have the bezel
removed and push it out from the inside with your finger.
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Removing the 3 screws from the rear of the bezel.
On the inside on the back of the bezel on the component side you will see 1 screw and on the other side 2 screws undo
them. Then the 2 screws on each side of the bezel, now slowly pry off the bezel from the controller boards and the bezel
should come away.
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Removing the 40 channel Switch and TX led board
Now you need to de solder the channel board from the main board, once you have done that you need to remove a small
board that has the TX led on it from the channel selector board.
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Once that has been separated from the channel selector board put it aside.
Turn the radio upside down and you will see the track side of the main board of the radio
Installing the 8 pin PLL Cable
You need to use the long cable with the 8 wires on it. And strip the ends off 6 of the wires so you can install it like this, or
you could solder it to the pll on the underside if you like.
As seen here I used double sided tape to hold the wires in place so I could solder them, without them coming loose when
I turned the radio over to solder them.
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TX led
You now need to de‐solder the board that has the TX led on it, that board also has the 7 segment channel readout on it
If you look on the channel board you can follow the tracks to see that the + side of the led has a Resister, de‐solder that as
you will need it, so you can relocate were you get the TX power from.
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That board with the TX led you need to cut that board like this below after you de‐solder the board from the channel
switch board.
The blue is + and the yellow is – in the above photo
Now solder 2 wires long enough to go over to were the PLL wires have been installed,
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Now use the resister you scabbed from the channel switch board and readout board for the TX led
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Now solder it in the same as you see in the photo and the other wire like you see from the LED.I used hot melt glue to
cover the solder of the wire to the resister, you can use heat shrink if you like.
Now hot glue the TX led into place, I hope you didn’t cut out the locating notch/hole, as you can see the clip it clips into.
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Wiring the 2 Scanning wires the green and black wire
On the back of the PCB that all the control pots are on and the signal meter leds are on.
Pin 8 of the LED driver IC, that’s IC551
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Then install the Black wire of the scan set to an earth, I scratched some of the lacquer off the main board next to the
earthing screw
Installing the power wires from the cb40
+ on the back of the on/off and volume switch
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Black on the back of the power plug at the rear of the radio.
Modding the rear of the Bezel for the OLED screen to fit.
I used a dermal with a cutting disc, I had to cut a slot in the side of the channel selector tube, and I had to remove the
clip that holds the channel switch board and led readout in place. Only do this if you will never return the radio back
to stock.
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Removing the clip I just cut it using the cutting disc and thinned the base of where it was to help make more room for
the OLED screen
You will need to remove all the chrome around the screen window, above it and at the bottom off it, so you don’t
short out the screen and blow the OLED screen or the CB40.
I used a flat head screw drive and scratched it till around the window was white and no chrome.
Also test fit the OLED screen, you will need to be super careful you don’t crack the bottom corners of the OLED screen
if you do you will fuck it and will have to buy a new screen under $10 AU but a bitch to have to break it.
Test fit it aand make sure it fits in the wndow nicely, if not use a small flat file and files the area you need.. make sure
all of the glass screen fits inside the window, and use the bezel decal to find the best spot to make it all fit inside the
the channel window in the decal. I wired the OLED first and turned the radio on once it was wired correctly, to get the
best and made sure it was square and not on an angle then hot melt in place like the photo below
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Plugging in the wires for the OLED screen from the cb40
You will need to solder the 4 pin header that came with the OLED screen in the packet, insert the short pin side in
from the back of the OLED screen and solder the pins from the front side.
Use the wire colour code from this photo of the cb40 as it’s the same as what you have but has header pins, the
wiring is the same. Please take note of the wires and numbers and what they plug onto.
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Soldering the header pins to the OLED screen
And this is not what you need to happen if it does the screens fucked, and it will cost you around $10
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Installing the Encoder/Channel switch
This is a simple install undo the nut and washer from the encoder and put it were the old channel switch once was
and do the nut up on the outside of the bezel the front, I used a pair of long nose pliers, careful not to over tighten
the encoder just make sure its tight not over tight.
Once you have all this done go and make sure everything is wired correctly, make sure no bridging of your
soldering on the pll wires triple make sure all is rightbefore you turn the radio on
Best place to install the cb40 is on the underside of the speaker lid, above were the channel switch was.
best leave the wires long, so if you need to open the radio to change settings or for any other reason you
will have room to move the lid out of the way.
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Setting up the CB40 for the PC122 in the setup menu
Make sure Switch 2 in ON for settings Menu
Choose UPD2824 SSB for the pll, then push in the Encoder/Channel Knob in to save it
Choose Disable ROM then push in the Encoder/Channel Knob in to save it
Choose LARGE screen then push in the Encoder/Channel Knob in to save it
Choose your Default start up channel keep pushing in the encoder (DON’T TURN THE KNOB PUSH IT
IN)till you get the channel you want for your home channel, when done just , turn the channel knob to
exit out of it.
Now you can go look at the saved settings push the encoder/channel knob in to read your settings and
they should look like this . Now you need to turn the radio off, then go to the CB40 and make sure
Number 2 switch is OFF , then turn your radio back on, then you should be in channel mode.
Now time to assemble your radio back together and enjoy your radio
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The scanning function
For this you need to be in channel mode first, now push the channel knob in once just a slow push, if
your to quick it will not work, now push it once you will see the scan menu come up , now rotate till you
get the setting your happy for it to run, the scan level goes from 0 – 60,when you have chosen the level you want
push the channel knob in and the radio will start scanning you will notice the word SCAN will be on the
left hand side above the Voltage readout.
To change the direction of the scanning up or down, just turn the channel knob up or down while its scanning.
To stop the radio from scanning just push the channel knob in once and it will stop
DISCLAIMER The author of this install, Bill Anson aka BuNtEr, and the designer of the CB40, are in no way liable for you screwing up
your radio due to your disability of not knowing what you’re doing or for any mistakes you make, that makes your
radio a parts radio.
All the parts of the CB40 kit are tested before they are posted to the new owner you, for any faults by the designer.
the CB40 will have the latest firmware installed when posted, there will be upgrades to the firmware if there is any
needed to in the future free of charge.
If you need any help or more info about the CB40 you can find it on the forum of www.cbrtia.com you will also find
other radios that have the CB40 or the CB40A or the CB40C installed into other radios.
I hope you have been successful with your installed CB40 into your Uniden PC122 73s and enjoy your new toy
V1.0 10:54pm 4/11/2018