# Sharp 36J-S400 CRT RGB mod

This tutorial covers the RGB mod for Sharp 36J-S400. These instructions should also work for

# 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

# 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.

READ THE RGB MODDING THEORY

# Service manuals

I couldn't find the service manual for this TV.

The below service manual has equivalent circuit.

# Schematics

IX2573CE Chroma Chip

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# Mux diagram

If you are building your own circuit, this diagram should help

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# Calculating the RGB external resistor value

Love it when we can put theories to use! Formula from our theory page!

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RGB external resistor value = 0.7 x (6800 + 75) - (75 x 5) / (5 - 0.7) = (4812 - 375) / 4.3 = 1030 ohm

~ 1 Kohm resistors should do the job.

# 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.

# STEP 1: Remove the following components

Remove the following components. RGB resistors to the ground. Measure twice and mark before you remove.

  • R803 (2.2 kΩ)
  • R804 (2.2 kΩ)
  • R805 (2.2 kΩ)

# STEP 2: Connect RGBs, Blanking and Audio

RGB and Blanking img

Sync and Audio img

Wire Routing img

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# STEP 3: 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.

Buy your RGB mux board

TV Model 36J-S400
Audio LR Short
RGB termination 75Ω
RGB inline resistors 1kΩ
Diode 1N4148

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Buy your RGB mux board

# 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?

# Remote Control for this TV

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# Getting into service menu

While pressing the Vol-up and Ch-up buttons at the sametime, plug the AC cord into a wall socket.

# Pictures of the mod

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