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Panasonic CT-27SL15

SuntharAbout 1 minCRT RGB mod

Panasonic CT-27SL15 CRT RGB mod

This is a work in progress tutorial.

Other than the fact the resistor values are slightly different the RGB mod should be similar to Toshiba 27AF45

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.

READ THIS BEFORE CONTINUING

Plan of attack

READ THIS TO PREPARE

Theory

Sometimes it is nice to know the theory behind the mod. I have put this on a separate page. This shows how the various resistor values are calculated.

READ THE RGB MODDING THEORY

Service manuals

Performing the mod

STEP 1: Remove the following components

Remove RGB resistors to ground

  • R141 (560Ω)
  • R142 (560Ω)
  • R143 (560Ω)

STEP 2: Disable VM (optional)

You can easily disable by disconnecting the VM cable on the neck board.

STEP 3: Connect RGB and blanking wires

STEP 4: Connect Sync, Audio and Ground wire

Connect the SIGNAL, AUDIO RIGHT, AUDIO LEFT, GROUND wires img

STEP 5: Prepare your RGB mux circuit

Below 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 precalculated resistor values.

Buy your RGB mux board

M61283FP can handle a peak to peak voltage of 0.7 in the external RGB lines.

Depending on the RGB/OSD stock resistors your CRT has, use the below inline resistors.

TV Model27F640
CRT inline resistors2.7kΩ
Removed ground resistor value560Ω
Add diodes to RGB inline?No
Add diodes to blanking on chassis?Yes
RGB termination (R1, R2, R3)75Ω
RGB inline resistors (R4, R5, R6)560Ω
Audio LR (R7, R8)1kΩ
Diode (R9)1N4148
Open (R10)--
Blanking Resistor (R11)shorted
Add diodes to RGB linesYes

STEP 6: Attach the female SCART connector to TV

Creating a SCART cutout and mounting it is an art. I have a dedicated section for it.

How to create and mount a SCART female plug?

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