Sony KV (BA-5D)
Sony BA-5D chassis (Sony KV-36FS100) CRT RGB mod
This mod was performed on a Sony KV-36FS100.
- KV-27FS100
- KV-27FS210
- KV-27FV300
- KV-27FV310
- KV-29FA210
- KV-29FS100
- KV-29FS100
- KV-29FV300
- KV-29FV300
- KV-29FV310
- KV-32FS100
- KV-32FS200
- KV-32FS210
- KV-32FV300
- KV-32FV310
- KV-34FS100
- KV-34FS100
- KV-34FV250
- KV-34FV310
- KV-36FS100
- KV-36FS200
- KV-36FS210
- KV-36FV300
- KV-36FV310
- KV-38FS200
- KV-38FV250
- KV-38FV310
CRT safety
Caution
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
Theory
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.
Service manuals
- Sony KV-27FS100 Service Manual
- Sony KV-36FS100 Service Manual
- Sony KV-27FV310 Service Manual
- Sony KV-32FV310 Service Manual
Schematics
Mux diagram 
Relevant schematics 
Performing the mod
Now that you roughly know what needs to be done, prepare for the mod. Place the board on a comfortable place. Make sure you are not putting pressure on the flyback or other components. There are few wires that needs to be disconnected.
- Degauss wire
- Power wire
- Ground wire attached to the neck board
- Yoke deflection coil wire
- Anode wire (this is the one with the rubber cap)
- Left and right audio wires
STEP 1: Remove the following components
- R020
- R022
- R024
STEP 2: Connect RGB
Replace jumpers JW42 (green), JW43 (blue), JW44 (red) with diodes.
3V is the caluclated voltage for blanking. We can calculate 1.2kΩ resistance needed on the RGB mux board with a diode to produce the correct blanking voltage.
STEP 3: Connect Blanking
Alternate location to connect blanking
STEP 4: Connect Sync
STEP 5: Connect Ground and Audio
STEP 6: Build your mux board
| Changes on the mux board | KV-27FS100 | KV-36FS100 | KV-32FV310 |
|---|---|---|---|
| CRT RGB inline resistor (on chassis) | 4.7kΩ | 4.7kΩ | 4.7kΩ |
| Removed resistor value (on chassis) | 680Ω | 680Ω | 680Ω |
| Add diodes to RGB lines (optional) | Yes | Yes | Yes |
| Add blanking diode on chassis? | No | No | No |
| RGB termination (R1, R2, R3) | 75Ω | 75Ω | 75Ω |
| RGB inline resistors (R4, R5, R6) | 1kΩ | 1kΩ | 1kΩ |
| Audio LR (R7, R8) | 1kΩ | 1kΩ | 1kΩ |
| Diode (R9) | 1N4148 | 1N4148 | 1N4148 |
| Blanking Ground Resistor (R10) | open | open | open |
| Blanking Resistor (R11) | 1.2kΩ | 1.2kΩ | 1.2kΩ |
STEP 7: 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
Flux issue (pictures shared by Cristian Mendez KV-27FV300)
KV-27FV300 is pretty much the same as KV-36FS100 expect for an inclusion of a BC board and a subwoofer.
Below image shows flux all over the IDC pins. 
When there is flux present, such as when resistors are removed on the main chassis or when soldering components on the mux board, it can cause a small amount of current to leak, leading to various kinds of interference. Below picture shows the white bar seen on the right side and the noise noticed.
After cleaning the flux and ensuring the ribbon cable is crimped properly, you can see the image is much cleaner and free of noise.
Games
TV
