# Apex AT2408S CRT RGB mod

This tutorial covers the RGB mod for the below models. This mod was performed by a fellow redditor (freqhog).

  • Apex AT2408S

Reddit thread (opens new window)

# CRT safety

DANGER

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.

READ THIS BEFORE CONTINUING

# Plan of attack

READ THIS TO PREPARE

# Service manuals

# 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.

apex 2408 schematics

apex 2408 schematics

# PCB

Points where the R, G, B and Blank wires should be connected are marked with colored dots.

apex 2408 pcb

# Performing the mod

# STEP 1: Remove the following components

Remove the RGB resistors to ground

  • R073
  • R072
  • R076

# STEP 2: Connect RGBs, Blanking and Audio

Connect the RED, GREEN, BLUE, BLANKING wires img

Connect the SIGNAL, AUDIO RIGHT, AUDIO LEFT, GROUND wires img

Overall mod 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

TV Model AT2408
Audio LR 1kΩ
RGB termination 75Ω
RGB inline resistors 220Ω
Blanking Resistor 1kΩ

img img

# STEP 4: Attach the female SCART connector to TV

I don't have pictures for this yet from the modder. They are still working on this at the time of this post.

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

img

img

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