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Sony KV (AA-2C) 32XBR48

Sony KV (AA-2C) 32XBR48

Kaz PackmanAbout 3 minCRT RGB mod

Sony AA-2C chassis CRT RGB mod

Below RGB mod was performed on a KV-32XBR48 by Kaz Packman.

Sony KV-32S66

This tutorial is also applicable for the below models:

  • Sony KV-32XBR48
  • Sony KV-35XBR48

CRT safety


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.


Plan of attack



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.



Sony KV-32XBR48

  • Manufactured: September 1997, Mexico
  • NTSC, 60 Hz - 195W
  • Chassis: AA-2C
  • Tube: M80JYV51X, Made in USA
  • Jungle Chip: CXA2025AS (IC351)
  • OSD Chip: CXP85856A-001S (IC001)

Service manuals

Step 1: Remove the following components

  • R1123
  • R1128
  • R133


Step 2: Connect RGB and blanking wires

Inject R, G, B where the resistors were removed, but on the pad that is not connected to the ground.


Step 3: Add a diode to blanking

Add this diode to reduce interference.


With diodes, direction matters. Please make sure to install it such that the stripe is pointing towards the chroma/jungle chip. The idea here is to make sure external blanking current doesn't reach the OSD chip.

Step 4: Connect audio and sync wires

For this mod, the Video 1 S-Video input was used for Sync and audio injection. For the S-Video input to work for this purpose, a jumper wire was soldered between the two shield pads of the connector as seen in the picture.


Alternatively, you can inject Sync into the Video 4 Component Luma input and audio into its respective audio input pads if you wish to use that input for RGB instead. A dummy RCA plug was connected to the Right Audio input to preserve Stereo functionality when using RGB SCART.

Step 4: Disconnect VM wires to reduce artificial sharpening

This set uses Velocity Modulation (VM), which can degrade the picture quality if not disconnected. It cannot be disabled in neither the user settings nor service menu, so it must be disconnected physically from the set.

You can do this in either one of two ways:

  • Method 1: Permanently disconnect the 8-pin cable coming from CN941 on the WA board, which is the board on the CRT neck placed between the deflection yoke and the neckboard.

  • Method 2: Remove the white wire from the 8-pin cable coming from CN941 on the WA board. To do this, unplug the cable from the WA board, place a pointed object in the catch on the plastic housing where the pin is located, pull out the wire from the connector housing while holding the pointed object in the catch to release it, then plug the cable back into the WA board without the white wire connected. It would be a good idea to isolate the metal crimp on the wire with Kapton tape to avoid shorting it out.


Step 5: 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 ModelKV-27V20KV-32S66KV-32XBR48
RGB termination (R1, R2, R3)75Ω75Ω75Ω
RGB inline resistors (R4, R5, R6)330Ω330Ω330Ω
Audio LR (R7, R8)1kΩ1kΩ1kΩ
Diode (R9)1N41481N41481N4148
Blanking Ground Resistor (R10) optional6.8kΩ6.8kΩ6.8kΩ
Blanking Resistor (R11)1kΩ1kΩ1kΩ
Add diodes to RGB linesNoNoNo
Add blanking diode on chassis?YesYesYes

It is important to note that the blanking ground resistor (R10) is necessary to prevent strange black backgrounds from appearing on the KV-27S22 OSD text.

Picture of RGB mux rev B board img

STEP 6: Attach the female SCART connector to TV

AA-2C chassis - RGB mux board

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?

AA-2C chassis - RGB mux board



Mux mod in action AA-2C chassis

AA-2C chassis - RGB games

AA-2C chassis - RGB games

AA-2C chassis - RGB games

AA-2C chassis - RGB games

AA-2C chassis - RGB games

AA-2C chassis - RGB games

AA-2C chassis - RGB games

AA-2C chassis - RGB games


Front AA-2C chassis - RGB games

AA-2C chassis - RGB games

AA-2C chassis - RGB games

AA-2C chassis - RGB games

AA-2C chassis - RGB games

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