RCA E13320 RGB mod
This tutorial is meant for those seeking the highest video quality possible from an old RCA CRT TV E13320.
You can die doing this! So read carefully! CRT TV is not a toy. Do not open a CRT TV. If you don't have any prior knowledge about handling high voltage devices, this guide is not for you. CRT TV contains high enough voltage (20,000+ V) and current to be deadly, even when it is turned off.
Plan of attack
Sometimes it is nice to know the theory behind the mod. I have put this on a separate page. This shows how the various resistor values are calculated.
Prepare the mux diagram. If you are building your own circuit, this diagram should help
Performing the mod
Now that you roughly know what needs to be done, prepare for the mod. Place the board on a comfortable place. Make sure you are not putting pressure on the flyback or other components.
STEP 1: Remove the following components
Remove the following RGB resistors that are connected to the ground.
STEP 2: Connect RGBs, Blanking and Audio
Picture below shows where the RGB and blanking wires should be soldered.
Composite Sync, Audio and Ground wires should be connected.
STEP 3: Build your mux board/circuit
Below mod uses the RGB mux board. This is optional, but will make your mod easier and stable. You can also create the circuit presented in the schematics above without the board.
|Audio LR (R7, R8)||1kΩ|
|RGB termination (R1, R2, R3)||180Ω|
|RGB inline resistors (R4, R5, R6)||820Ω|
|Blanking Resistor (R11)||1.5kΩ|
STEP 4: Attach the female SCART connector to TV
Creating a SCART cutout and mounting it is an art. I have a dedicated section for it.
Adding an audio ouput
If you want audio output, you can tap into it before the 1 kΩ resistors on the mux board. Side closer to the SCART input and not the side closer to the ribbon cable. You can use the orange wire for ground.