RCA F27442
RCA F27442 CRT RGB mod
This tutorial covers the RGB mod for RCA F27442.
View full CRT details and more mod examples →
Contributors
Thank you to everyone who contributed to this guide:
- Trinzar's Sector — photos and documentation
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
Manuals and Datasheets
Specs
- Year:
- Chassis: CTC203AD5
- Jungle Chip: Sanyo LA7612A
- OSD Chip:
RGB mux diagram
Prepare the mux diagram. If you are building your own circuit, this diagram should help.
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 calculator to play with your own values.
| Component | Value |
|---|---|
| RGB/OSD inline resistor (chassis) | 470Ω |
| Removed RGB/OSD resistor (chassis) | 1.1kΩ |
| RGB inline diode method (chassis) | Yes |
| RGB termination (R1, R2, R3) | 75Ω |
| RGB inline (R4, R5, R6) | 470Ω |
| Audio LR (R7, R8) | 1kΩ |
| Diode (R9) | 1N4148 |
| Blanking Ground Resistor (R10) | open |
| Blanking Resistor (R11) | 1kΩ |
Performing the mod
You can replace R26443 with the diode and leave R12714 (1kΩ) alone on the CRT chassis.
Pictures
Photos by Trinzar's Sector
