Get the PDF of the 2003 and compare it to the 1022 - let's see...
Remember - you will have some issues with the pinout so you have two ways of doing this - jumpers, as in soldered to the legs of or you do up a board and mounting to the side panel than wired into to replace...
So before I even begin...
You need to be sure you have the board...because if you don't you'll have more pins than you really need and this can't work...
For example TA7222AP...
From the inside...
From the Foil side...
I thought you were going to give Cobra a call to see if they had an adapter board...oh, well - this will look like hell but it is still possible, So to see you deciding to do this and just order the part - that's fine but did you even call Cobra?
So if you want to proceed you have to be supplying me a photo of your board so I can proceed....so I know what you're doing...
Because - the YD 1022 as you pointed out had a pin design - paired up on output. This design that you're doing needs to be mounted then soldered - so firstly I would look over all these steps before you decide to jump into this.
IT also has a thickness issue, the TDA2003 is a TAB to the rear - while the tab on the YD1022 and TA7222AP are in the middle...
The TDA2003 is 5 mm - just a little thicker than the YD1022
Because you will have to bend things...like leads and flatten or spread a flange of the side panel - ARE YOU SURE YOU WANT TO DO THIS?
The Bends the TA 2003 require a BRAKE device, not always available to everyone and to do this at home - not easy.
I've done it but you can lose the part if you do it and it's not right on the first try...
Why? Because the angle is about 20 degrees tilt you have to bend the tab - so if it's a little less don't worry, too much and bending it back can break the part ok?
1 - straighten leads for clearance - the TDA2003 has a pre-formed pin package, so if you don't have the header the leads need to be setup so you can solder a set of solid enameled wires to allow length attach to the board.
2 - Any Enamel wire of AWG #18 works for this... and if you have various colored enamel coated wires even better. - helps to identify...
(The idea of solid works better versus stranded - and you attach to the part first an use a heat shrink tubing to help keep pins from shorting....)
3 - Do a pre fit
Decide here, if you want...
HIDDEN - once the leads are "flattened" so it can be edge mounted - you also should have got a package insulator that allows you to mounted it insulated from the heat sink - so you'll need to do this too - the TDA2003 is thicker than the YD chip - so watch your tab mounting - the YD-1022 is a lot like the 7222ap - so it's tab is in the middle depth or thickness of the part - what does that mean for you? - well if you contacted Cobra you would have had the spacer insulator too...because you can use both - the original for the front part of the tab, (that mounts to the side panel) and the rear for the flange "tang" the pressed inward part from the side panel - you're essentially bending a TO-220 to 20 degree tilt on the tab.
THE 2003 TAB IS BENT BACK A TILT OF 20 DEGREES - and mounted with face outwards (pin 1 to front face of radio) Using the space supplied with the 2003 - isn't used to hold - it is used to back the rear of the 2003 seating it on that pressed flange A simple epoxy even nail polish works to hold the mica spacer once this pre-fit step is completed - the tab uses the originals' spacer and hardware for most of the heat - and mounting - the rear part of the TDA2003 is fitted with its supplied spacer - to seat in place and keep from shorting.
Otherwise
FLAT but UPSIDEDOWN- you can make up a simple perfboard to mount the 2003 flat but upside down - for then the face is towards the inside - and it's Pin 1 and pin 5 are still oriented correctly - and you have the perfboard to help with any wiring support issues - you don't change the parts on the main PCB - the 2003 wires to it thru this perfboard. Like I showed with the 7257 part that the 68 / 78 uses...
So if the above looks simple enough - remember this step is a labor of love, you don't get paid for the hours you spend on making the new part fit - I've done this to several different radios due to the YD or 7222 are no longer cheap and the boss wanted it done - so you know ... no pressure here but you should have contacted cobra and got advice from them first
I been using the perfboard - and if done right - you don't even need it - you just mount it upside down bend leads to 90 degree "fan" spread and solder wire up to it from the main PCB - it's why I need a photo of your radio - some people like the "hidden" effect while others just want a new chip.
Using one Method, when you have time, the other way, you don't and have to do all this fitting and its' done in (a lot) fewer hours.
That's why I'm asking ARE YOU SURE YOU WISH TO PROCEED - you've already been given all the steps - just the point to point wiring is needed.
I'm not allowed to take pics of a customers radio - the boss I work for honors privacy issues. You have enough examples on you tube already - so this is up to you...
:+> Andy <+:
