Toshiba 24AF43+
Toshiba 24AF43+ CRT RGB mod
This tutorial covers the RGB mod for the below models.
- Toshiba 24AF43
- Toshiba 24AF44
- Toshiba 24AF45
- Toshiba 24AF46
Please also see other Toshiba AF series mods, as the instructions are more or less the same.
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
Service manuals
Specs
24AF43
- Chassis: M3M627
- Manufactured: Thailand, April 2003
- Power Consumption: 125W, 120V, 60Hz (NTSC)
- Tube: Orion A60LVY196X11
Schematics
Get hold of the schematics for your TV. Understand where the RGB and Fast Blanking signals go from OSD to the Jungle (Chroma) chip.
If you are building your own circuit, this diagram should help 
PCB
Points where the R, G, B and Blank wires should be connected are marked "X". Pink boxes show the resistors, diodes that needs to be removed.
Actual PCB might be slightly different for your particular CRT. However, the mod that needs to be applied is in similar location. Below was taken from Toshiba 20AF44.
Performing the mod
STEP 1: Remove the following components
Remove the RGB resistors to ground
- R141
- R142
- R143
Unplug the VM cable on the neck board. 
STEP 2: Connect RGBs, Blanking and Audio
Connect the RED, GREEN, BLUE, BLANKING wires 
Connect the SIGNAL, AUDIO RIGHT, AUDIO LEFT, GROUND wires 
STEP 3: Build your mux 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. Please also checkout the precalculated resistor values.
Depending on the RGB/OSD stock resistors your CRT has, use the below inline resistors.
| TV Model | 24AF4x | 24AF4x | 24AF4x |
|---|---|---|---|
| RGB/OSD stock resistors | 3.3kΩ | 3.9kΩ | 6.8kΩ |
| Audio LR (R7, R8) | 1kΩ | 1kΩ | 1kΩ |
| RGB termination (R1, R2, R3) | 75Ω | 75Ω | 75Ω |
| RGB inline resistors (R4, R5, R6) | 470Ω | 560Ω | 1kΩ |
| Diode (R9) | 1N4148 | 1N4148 | 1N4148 |
| Blanking Resistor (R11) | shorted | shorted | shorted |
Sample Toshiba 20AF44 RGB Mux Adapter 
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.
How to create and mount a SCART female plug?
Pictures
Mux board on TV
Mux board, inside view 
Mux board, outside view 
Games - Close up
SNES - Contra 
NES - Adventure Island 
NES - Super Mario 
SNES - Mega Man X 
Games
SNES - Contra 
NES - Adventure Island 
SNES - Mega Man X 
Sega Genesis - Sonic 
XBOX - UnleashX menu 
Test patterns
