JVC AV-20D202
JVC AV-20D202 CRT RGB mod
RGB modification showcase converted from a community support request.
View full CRT details and more mod examples →
This CRT uses the same board as JVC AV-27230 and therefore, please follow the mod details outlined there.
Contributors
Thank you to everyone who contributed to this guide:
- Justin'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
- JVC AV-20D202 Schematics
- JVC AV-20D202 Service Manual
- Toshiba TB1253AN Datasheet (Jungle)
- M37272MA-314SP Datasheet (OSD)
Specs
- Year: 2001
- Format: NTSC
- Chassis: FD
- Tube: Samsung A51KRE89X
- Jungle Chip: Toshiba TB1253AN
- OSD Chip: M37272MA-314SP
- Screen Size: 20"
- Inputs: Composite, S-Video, RF, Component YPbPr
RGB mux diagram
Schematics
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) | 4.7kΩ |
| Removed RGB/OSD resistor (chassis) | 1.5kΩ |
| RGB inline diode method (chassis) | Yes |
| RGB termination (R1, R2, R3) | 220Ω |
| RGB inline (R4, R5, R6) | 1kΩ |
| Audio LR (R7, R8) | 1kΩ |
| Diode (R9) | 1N4148 |
| Blanking Ground Resistor (R10) | 4.7kΩ |
| Blanking Resistor (R11) | 1kΩ |
Performing the mod
Detailed mod instructions to be added.
Pictures
Photos by Justin's Sector
Mux board configuration
Diodes installed
Resistors removed
R, G, B, blanking wires attached
Sync, ground, audio wires attached
Full mod picture
