Sony Profeel/XBR Series

# Feeding Sony Profeel CRTs analog RGB signal

• Sony KV-1311CR
• Sony KX-1901A
• Sony KX-2501A
• Sony KV-20XBR
• Sony KV-25XBR
• Sony KV-25DXR
• Sony KX-1211HG

Below NEC model also has similar pinout as Sony Profeel

• NEC DM-2000Popen in new window
• NEC CM2591A

# Below CRTs are confirmed to be supported through the 1.4B 34PIN adapter

Only the display works through the 34 pin input and not audio. To enable audio, internal rework is required to connect the audio to the Peri-TV input. Therefore, recommend just using the SCART (Peri-TV) input with the correct voltages.

• Sony KX-20PS1
• Sony KX-27PS1

# 34 Pin RGB/SCART Adapter

Buy your adapter here

New and improved adapter is only 2cm wide, making it possible to use without an extension cable for most sets.

Two different adapters are available depending on the orientation you prefer for the cable and your set. However, no need to fret. Just provide me with the model number of your set when placing the order and I will take care of the rest.

• KV-1311CR (v1.6B keeps the SCART cable pointing downwards, J5 soldered and two resistors added for mono audio)
• Sony KV-25XBR (v1.4B keeps the SCART cable pointing downwards)
• Sony KX-1901A (v1.4B or v1.4A)
• Sony KX-2501A (v1.4A)
• Sony KX-1211HG (1.4B, tight clearance for SCART cable - may need to raise the CRT by an inch)
• NEC CM2591A (v1.4B keeps the SCART cable pointing downwards)

If you're placing an order for the adapter, kindly send me your CRT model number and, if possible, include a photo of the back of your set to ensure you receive the correct version of the board with the appropriate jumpers soldered.

# Buy the adapter

Buy your adapter here

# Service Manuals

• Sony KX-1901A
• Sony KX-2501A
• Sony KV-1311CR
• Sony KV-20XBR
• Sony KV-25XBR
• Sony KV-25DXR
• Sony KX-1211HG
• NEC CM2591A

# Shifting the RGB image using an external shifter

If your CRT doesn't provide an easier way to shift the RGB image, you can use an external RGB shifter.

External RGB shifters

# Pictures

# Adapter

# KX-1901A

Works as plug and play. Both 1.4A and 1.4B should work well.

Adapter on Sony Profeel KX-1901A

# KX-2501A

Works as plug and play. 1.4A recommended.

Below pictures show the user plugged in directly. Please note, you will need to insulate the back of the adapter if you want to plug in this way.

# KX-1211HG

Works as a plug-and-play device. Insulate the screw for added protection.

# KV-1311CR

Works as a plug-and-play device. v1.6C custom adapter was specifically designed for the KV-1311CR to enable audio through the external 5V blanking signal. Additionally, to utilize the mono speakers effectively, two 1Kohm resistors were incorporated into both the left and right audio channels on the adapter board.

v1.4B/v1.6C

v1.4A

v1.4B board is recommended to keep the cables pointing downwards. Jumper J5 must be soldered for the set to use the audio input from SCART.

# NEC CM2591A

New 2cm adapter doesn't need an extension cable. What's shown in the pictures below is the previous version, which required an extension cable.

# KV-20XBR

Works as plug and play.

# KV-25XBR

Works as plug and play.

This CRT had some internal issue where there was a red tint.

Upon reviewing the schematics, it appears that there is no dedicated potentiometer for external RGB adjustment. However, on the CRT "A" board, there are three capacitors (C824 to C826 - 33uF/16V) located near the RGB connector, and another three capacitors (C401 to C403 - 10uf/16V) that provide the RGB signal to IC401. It may be worth trying to replace the capacitors that are responsible for feeding the red line.

Moreover, there are several pots that you can adjust on the A board, namely RV401 (G SUB BRT), RV402 (B SUB BRT), and RV403 (RGB SUB BRT), which can help fine-tune the RGB signal.

Here are a few suggestions to try:

1. Adjust the RV403 pot to see if you can alter the brightness level of the RGB signal without affecting the composite signal.
2. Experiment with RV402 and R401; increasing the G and B values should reduce the red tint.
3. Check the capacitor on the red path and replace them if necessary.

Lowering (RV403) RGB SUB BRT and increasing the RV401 (G SUB BRT), RV402 (B SUB BRT) ever so slightly and the RGB colors on this CRT is FIXED!!!

After adjusting

# KV-25DXR

Should work as plug and play, if you remove the ground screw. Please make sure to insulate the back of the adapter.

Another option is to use a small 34pin extension cable.

# KX-27PS1/KX-20PS1

Note: 1.4B adapter with J3 and J7 jumper closed works with this set. However, for audio to work internal rework is required - which is quite simple. Details below.

# 34-pin MULTI input

Findings revealed that the 34-pin MULTI input adapter requires a 5V connection on pin 33 (to select RGB mode) and a 3V connection on pin 29 (Blanking). Also, upon examining the schematics, it was observed that the audio input does not pass through the 34-pin MULTI input (specifically pin 20 and pin 24). Additional internal wiring within the set is necessary to enable audio functionality. Although it is indeed possible to make the adapter function, it would be unnecessary considering the existing SCART input.

There are jumpers on the latest v1.4B to achieve the following.

J3 = Force RGB mode select (send TV's 5V to Pin 33) J7 = Force blanking (send blanking 5V to Pin 29)

Default configuration for most sets = all jumpers open

To enable audio through 34-pin MULTI input, internal rework is required to jump Left and Right audio wires from the 34pin input to the Peri-TV audio inputs.

# Peri-TV input

If your SCART (Peri-TV) input is not working, I would suggest feeding in 5V to pin 8 in addition to pin 16 to see if you can get the sync to work.

• Sony KX-27PS1 Service Manual
• Sony KX-20PS1 Service Manual

KX-27PS1 (adapter fits nicely for display input!)

# Early prototype

I guess you have to start somewhere with these mods. This was my early prototype made with a floppy cable. While it worked, it was really messy.

Someone made this adapter. It's nice to see how they made their's as well. Click the image below to see the imgur post.

open in new window

# 34 pin connector

Mapping for the 34 pin connector to the floppy connector can be seen below.

# Pin Translation