JVC AV-27020
About 4 min
JVC AV-27020 CRT RGB mod
This tutorial covers the RGB mod for JVC AV-27020.
View full CRT details and more mod examples →
Contributors
Thank you to everyone who contributed to this guide:
- Brendan Eddy — 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
Service manuals
Specs
- Year:
- Chassis: FV2
- Jungle Chip: TA1242N
- OSD Chip: M37272MA
- Screen Size: 27"
RGB mux diagram
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 |
| 0.1μF caps replaced (chassis) | Yes |
| RGB termination (R1, R2, R3) | 220Ω |
| RGB inline (R4, R5, R6) | 1.2kΩ |
| Audio LR (R7, R8) | 1kΩ |
| Diode (R9) | 1N4148 |
| Blanking Ground Resistor (R10) | open |
| Blanking Resistor (R11) | 1kΩ |
Performing the mod
Detailed mod instructions to be added.
Pictures
Photos by Brendan
Reference Photos