Guys, I bought this little cutie today (that pic is not great, but I'm not close to it now to take a good one) and I contacted a reputable CRT technician in my city, but he said he doesn't know the steps to achieve an RGB mod on that specific model, that if I could find information he could perform it, so here I'm, me, my friend GPT and my friend Gemini trying to figure that out. 😂

From what I got, my TV is literally the same thing as a KV-8AD10, and I found the schematics:

https://crtdatabase.com/crts/sony/sony-kv-8ad10/8ad10_sch.pdf

The jungle seems to be the LA7650, and I understood that the RGB would be handled by the M50439-711SP (OSD), therefore for this mod we would need to do a Mux. 

Gemini gives me a full explanation, but I have trust issues, especially with AI, these are its instructions.

​1. Bill of Materials (BOM)

​You will need to purchase the following electronic components:

​3x Capacitors: 0.1µF (Ceramic or Tantalum) for AC coupling of R, G, and B signals.
​3x Resistors: 75 \Omega (1/4W) for signal termination (impedance matching).
​3x Resistors: 560 \Omega (1/4W) for signal attenuation (brightness balancing).
​2x Diodes: 1N4148 for the "Automatic Blanking" logic.
​1x Resistor: 1k \Omega (1/4W) for the Blanking line protection.
​1x Connector: SCART (Female) or 4x BNC/RCA connectors.
​Wiring: AWG 28 or 30 ribbon cable or thin insulated copper wire.


​2. Technical Instructions for the Technician

​Step A: Locate the Injection Points

​The technician must find the IC001 (M50439-711SP) microcontroller on the main board.
​Pin 21 (Red): Connected to resistor R023 (10k).
​Pin 22 (Green): Connected to resistor R024 (10k).
​Pin 23 (Blue): Connected to resistor R025 (10k).
​Pin 24 (Blanking/BLK): Connected to resistor R022 (10k).


​Step B: The RGB Mux Circuit

​Lift the Resistors: Desolder and lift one leg of R023, R024, and R025 (the side facing away from the IC) to "break" the original OSD path.

​Inundate Signals: Connect the external RGB signals from your console to the lifted legs.

​Circuit Path: For each color line: Console Signal ➡️ 0.1µF Capacitor ➡️ 75 (Oms) Resistor (to Ground) ➡️ 560 (Oms) Resistor (in series) ➡️ Original Resistor Pad.


​Step C: Automatic Blanking (Diode OR-Gate)

​To make the TV switch to RGB automatically when the console is turned on:
​Connect a 1N4148 diode from IC001 Pin 24 (Anode to Pin 24).
​Connect a second 1N4148 diode from the SCART Pin 16 (or your 5V/3V trigger source).
​Join the Cathodes of both diodes and connect them to the input of the blanking circuit at R022.
​This allows the TV to display RGB signals while still showing the volume/channel OSD over the game.

​Step D: Sync and Audio

​Sync: Connect the Composite Video/Sync wire from your console to the Center Pin of the J401 (Video In) jack.

​Audio: Since this TV is Mono (see IC251), bridge the Left and Right audio channels from your console using two 1k (Oms) resistors and connect them to the J402 (Audio In) jack.



Does this look legit? 🤔

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