Sony KV (BA-5D)
Sony BA-5D chassis CRT RGB mod (Coming Soon)
So you want to get the best video output via your good old CRT to play retro games?
This tutorial covers the RGB mod for the below models
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.
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. There are few wires that needs to be disconnected.
- Degauss wire
- Power wire
- Ground wire attached to the neck board
- Yoke deflection coil wire
- Anode wire (this is the one with the rubber cap)
- Left and right audio wires
STEP 1: Remove the following components
STEP 2: Connect RGBs, Blanking
Replace jumpers JW42 (green), JW43 (blue), JW44 (red) with diodes.
3V is the caluclated voltage for blanking. We can calculate 1.2kΩ resistance needed on the RGB mux board with a diode to produce the correct blanking voltage.
STEP 3: Connect Sync and Audio
STEP 4: Build your mux board
|CRT RGB inline resistor||4.7kΩ|
|CRT RGB ground resistors removed||680Ω|
|CRT RGB inline cap value||0.1uF|
|Use RGB inline diodes on CRT chassis?||Yes|
|Mux board Audio LR (R7, R8)||1kΩ|
|Mux board RGB termination (R1, R2, R3)||75Ω|
|Mux board RGB inline resistors (R4, R5, R6)||1kΩ|
|Mux board blanking diode (R9)||1N4148|
|Mux board blanking Resistor (R11)||1.2kΩ|
STEP 5: Attach the female SCART connector to TV
Creating a SCART cutout and mounting it is an art. I have a dedicated section for it. How to create and mount a SCART female plug?