Toshiba 27AFX54+

# Toshiba 27AFX54+ CRT RGB mod

The Toshiba 27AFX54 is a 27" flat-screen CRT television released in 2004 as part of the premium "Cinema Series" line.

It is well-regarded for its crisp picture quality, built-in component video inputs, and 16:9 vertical compression features. However, it does have minor screen geometry quirks that can be noticeable in horizontally scrolling games.

View full CRT details and more mod examples →open in new window

Picture from Toshiba 27AFX54 (Cinema Series)

NES Adventure Island

Please also see other Toshiba AF series mods, as the instructions are more or less the same.

• Toshiba 14AF43
• Toshiba 20AF43
• Toshiba 24AF43
• Toshiba 27AF43

# Table of Contents

# Contributors

Thank you to everyone who contributed to this guide:

• Suntharopen in new window — contributor, RGB mod and pictures

# CRT safety

READ THIS BEFORE CONTINUING

# Plan of attack

READ THIS TO PREPARE

# Manuals and Datasheets

• Toshiba 27AFX54 Service Manualopen in new window
• Renesas M61283FP Datasheet (Jungle)open in new window

# Specs

• Year: 2005
• Format: NTSC
• Tube: LG A68QCU770X66L
• Jungle Chip: Renesas M61283FP
• OSD Chip: Orion OEC7092A
• Screen Size: 27"
• Weight: 88.2 lbs
• Inputs: Composite, S-Video, RF, Component YPbPr

# Schematics

# RGB mux diagram

Prepare the mux diagram. 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.

# Performing the mod

# STEP 1: Remove the following components

Remove RGB resistors to ground

• R141
• R142
• R143

(Optional) Removed the diodes that enable the edge enhancer. Doesn't do much to fix the minor jitter/interference seen on this particular TV. However, simplifies the RGB lines.

• D102
• D104
• D108
• D107
• D103

# STEP 2: Connect RGBs, Blanking and Audio

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

Connect the R, G, B and blanking (orange) wire.

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

Full mod

# STEP 3: Prepare your RGB mux circuit

M61283FP can handle a peak to peak voltage of 0.7 in the external RGB lines.

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

This 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 mux calculatoropen in new window to play with your own values.

Compatible mux boards:

• RGB MUX BOARD KIT 1.4Copen in new window
• RGB MUX BOARD KIT 1.4Bopen in new window

Buy your RGB mux board kit

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?

# Toshiba 27AFX54 Pictures

# OSD Mux Mod

# Games

SNES - Contra 3

SNES - Contra 3

SNES - R-Type

SNES - Super Metroid

NES - Adventure Island

# Test patterns

SMPTE

Convergence

Grid - Geometry (yoke can be tilted a bit)

# Front input

# Service Menu Settings

# Recapping

# Capacitor codes and references

If you're not confident in cutting the SCART port yourself, I recommend going with the variant C of the board along with the trim plate for a cleaner, more professional look.

# Pictures

# Reference Photos

See more photos and contributions →open in new window