# 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


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 img


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. img


# STEP 2: Connect RGBs, Blanking and Audio

Connect the RED, GREEN, BLUE, BLANKING wires img


# 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.

Buy your RGB mux board

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 img

# 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 img

Mux board, outside view img

# Games - Close up

SNES - Contra img

NES - Adventure Island img

NES - Super Mario img

SNES - Mega Man X img

# Games

SNES - Contra img

NES - Adventure Island img

SNES - Mega Man X img

Sega Genesis - Sonic img

XBOX - UnleashX menu img

# Test patterns