Sony (ANU-2) KV-27EXR20

# Sony (ANU-2) KV-27EXR20 CRT RGB mod

The Sony KV-27EXR20 is a premium 27" CRT television released in the early 1990s, built on Sony's renowned Microblack Trinitron picture tube technology.

This CRT is RGB moddable using the direct injection method.

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

This RGB mod applies to the following models. Other ANU-2 chassis can also utilize the same mod.

• KV-20EXR10
• KV-20EXR15
• KV-20EXR20
• KV-27EXR10
• KV-27EXR15*
• KV-27EXR20
• KV-27EXR25*

*The P-Board for Picture-in-Picture functionality must be removed in these models.

# Contributors

Thank you to everyone who contributed to this guide:

• Kaz Packmanopen in new window — contributor, RGB mod and pictures

# CRT safety

READ THIS BEFORE CONTINUING

# Plan of attack

READ THIS TO PREPARE

# Manuals and Datasheets

• Sony KV-27EXR20 Service Manualopen in new window

# Specs

• Manufactured: Mexico (1992)
• Chassis: ANU-2
• Tube: Sony Microblack Trinitron A68JMT50X
• Jungle Chip: Sony CXA1313S
• OSD Chip: M37100M8-115SP

# RGB mux diagram

Prepare the mux diagram. If you are building your own circuit, this diagram should help.

# Performing the mod

Please note below mod uses an external switch for the 5V.

# STEP 1: Add a male DuPont connector for RGB

Unlike the 20" counterpart, the KV-20EXR20, the A-31 header and the four 100 ohm resistors that come between it and the jungle chip were already populated. However, the A-31 connector had to be removed and replaced with a male DuPont because the connector's pins were too short to securely seat a DuPont cable.

Populate the A-31 header with a 5-pin male DuPont header connector in the pins labeled "B IN", "G IN", "R IN", "E", and "YS".

# STEP 2: RGB wires for female DuPont connector

Five of the wires from the Mux board IDC cable (Blue, Green, Red, Orange, and Brown) were crimped to a female DuPont connector for connection to the header on the TV chassis.

# STEP 3: Sync and Audio wires

The black ground wire was connected to the S-Video sensing circuit on the U2 board to allow the use of S-Video Luma as a Sync input.

# STEP 4: RGB mux board

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 1.4Bopen in new window

Buy your RGB mux board kit

# STEP 5: Service Menu Adjustments

Go into the service menu and adjust the horizontal position (labeled "HPOS" in the service menu) until it looks properly centered. If you're inputting sync into the S-Video input, you should only have to adjust it by about 2 or 3 subtracted from the original value.

# STEP 6: 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 of the mod

# Games

# Pictures

# Reference Photos

See more photos and contributions →open in new window