Toshiba 27AF42

# Toshiba 27AF42 CRT RGB mod

This tutorial covers the RGB mod for the below models.

• Toshiba 27AF42

# CRT safety

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

• 27AF42 Service Manual
• Toshiba TA1310AN Datasheet

# Schematics

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

# Performing the mod

# STEP 1: Remove the following components

• RR02 (4.7kΩ)
• RR04 (4.7kΩ)
• RR06 (4.7kΩ)

Disconnect the PiP chip by removing these

• RR01B (1kΩ)
• RR03 (1kΩ)
• RR05 (1kΩ)

# STEP 2: Connect RGB and blanking wires

Insert your rgb at the empty holes left by RR01B (blue), RR03 (green) and RR05 (red) that connect to the capacitors at CR01, CR02, CR03

• Brown wire = blank
• Red wire = red
• Blue wire = blue
• Green wire = green
• Yellow wire = csync
• Organge wire = auxillary
• Grey wire = audio right
• White wire = audio left
• Purple = auxillary
• Black = common ground

# STEP 3: Connect Sync, Audio and Ground wire

Connect the Sync, Audio Right, Audio Left and Ground wires

# STEP 4: Prepare your RGB 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

TA1310AN can handle a peak to peak voltage of 0.5V in the external RGB input lines.

Depending on the RGB/OSD stock resistors your CRT has, use the below inline resistors.