Sony KV (BG-2T) PG14P10
Sony BG-2T chassis CRT RGB mod (work in progress)
Below details are for Sony KV-PG14P10
CRT safety
Caution
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
Theory
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.
Service manuals
Specs
- Chassis: BG-2T
- OSD: CXP85224A-079S
- Chroma: TDA8843
Performing the RGB 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. Taking out the chassis is fairly straight forward on this CRT. 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
Please remember that wires 1-5 are critical for the CRT to function and should not be omitted. Having any of these wires disconnected while powering up can damage the board and can have adverse effects.
Mux diagram
If you are building your own circuit, this diagram should help. This is just a conceptual diagram.
Connector CN001 can be utilized to inject R, G, B, Blanking and ground.
STEP 1: Remove the following components
Remove the three (0Ω) ground resistors or jumpers if present.
- R330
- R331
- R332
STEP 2: Connect RGB, Blanking and Ground
STEP 3: Connect Audio and Sync
STEP 4: Build your mux board
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. Please also checkout the precalculated resistor values.
| RGB mux board | KV-PG14P10 |
|---|---|
| RGB termination (R1, R2, R3) | 75Ω |
| RGB inline resistors (R4, R5, R6) | 390Ω (?) |
| Audio LR (R7, R8) | 1kΩ |
| Diode (R9) | 1N4148 |
| Blanking Ground Resistor (R10) | open |
| Blanking Resistor (R11) | 560Ω |
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?