Zenith SY2568S
Zenith SY2568S CRT RGB mod
The Zenith SY2568S is a 25", curved CRT television.
You can modify this set for RGB.
View full CRT details and more mod examples →
Contributors
Thank you to everyone who contributed to this guide:
- tsukase's Sector — showcase author
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
- Zenith SY2568S Service Manual — Available for Pro Users only. See CRT details for access.
- Toshiba TA1242N Datasheet (Jungle)
Specs
- Manufactured: Mexico (1997)
- Jungle Chip: Toshiba TA1242N
- Screen Size: 25"
- Power: 111 W
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.
| On Zenith CRT Chassis | SY2568S |
|---|---|
| CRT RGB inline resistor | 7.5kΩ |
| CRT RGB ground resistors removed | 3.9kΩ |
| 0.1μF caps replaced | No |
| Add diodes on chassis RGB lines? | No |
| Add blanking diode on chassis | No |
| Replace blanking resistor on chassis | No |
| RGB mux board | SY2568S |
|---|---|
| Mux board RGB termination (R1, R2, R3) | 75Ω |
| Mux board RGB inline resistors (R4, R5, R6) | 3.3kΩ |
| Mux board Audio LR (R7, R8) | 1kΩ |
| Mux board blanking diode (R9) | 1N4148 |
| Mux board blanking ground resistor (R10) | open |
| Mux board blanking resistor (R11) | 1kΩ |
Compatible mux boards:
Performing the mod
This RGB mod is not confirmed.
Remove the 3.9K ground resistors, R2271,R2273,R2275 and inject the RGB signals there.
Pictures
Mod Photos
RGB modification showcase of a Zenith SY2568S CRT.
Reference Photos