RCA F25645
RCA F25645 CRT RGB mod
The RCA F25645 is a 25" mainstream, affordable CRT released in the early 2000s.
The quality of this CRT and its chassis indicates that RCA cut corners to reduce costs. While it is a decent set, caution is required when RGB modifying the unit to avoid lifting traces.
View full CRT details and more mod examples →
- RCA F25649 (uses the same Chroma and OSD)
Contributors
Thank you to everyone who contributed to this guide:
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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: CTC203AC9
- Jungle Chip: Sanyo LA7612N
- OSD Chip:
- Screen Size: 25"
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) | 1.6kΩ |
| 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) | 0μF |
Compatible mux boards:
Performing the mod
RGB mod for this crt is not verified. Therefore, try at your own risk.
References
WIP: https://imgur.com/a/rca-ctc-203ax-rgb-mod-notes-6RovAik