Sharp CJ13M10

# Sharp CJ13M10 CRT RGB mod

This tutorial covers the RGB mod for Sharp CJ13M10.

View full CRT details and more mod examples →open in new window

This tutorial covers the RGB mod for Sharp CJ13M10. These instructions should also work for

• Sharp CL13M10
• Sharp 20KS100

# Contributors

Thank you to everyone who contributed to this guide:

No contributors listed yet.

# CRT safety

READ THIS BEFORE CONTINUING

# Plan of attack

READ THIS TO PREPARE

# Service manuals

• Sharp CJ13M10 Service Manualopen in new window

# Specs

• Year: 1997
• Format: NTSC
• Tube: Sharp CPJ370BVBK1S
• Jungle Chip: Sharp IX2933CE
• OSD Chip: Sharp IX2942CE
• Screen Size: 13"
• Inputs: Composite, RF

# RGB mux diagram

Now that you roughly know what needs to be done, prepare for the mod. Place the board on a comfortable place. Make sure you are not putting pressure on the flyback or other components.

# STEP 1: Remove the following components

Remove the following components. RGB resistors to the ground. Measure twice and mark before you remove.

• R803 (1.8 kΩ)
• R804 (1.8 kΩ)
• R805 (1.8 kΩ)

Optional

• Replace 0.1uF, 50V electrolytic capacitors with 0.1uF, 50V ceramic capacitors
• Add a diode inline for the blanking circuitry and replace the 6.8kΩ resistor with a 4.7kΩ resistor.

# STEP 2: Connect RGBs, Blanking and Audio

Close up of RGB and Blanking

Close up of Sync and Audio

All wired up!

Another picture from a different set

# STEP 3: Ceramic inline caps (optional)

I would recommend changing the inline RGB caps to 0.1uF ceramic capacitors.

# STEP 4: Add diode to the blanking

On the CRT chassis change R2027 from 6.8k to 4.7k along with a 1N4148 diode.

This is recommended to reduce interference. See the mux diagram above and the picture circled below.

Diode stripe should be pointing in the correct direction.

# STEP 5: Build your mux board

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 calculatoropen in new window to play with your own values.

Buy your RGB mux board kit

# 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?

Route the ribbon cables carefully, not touching the heat sinks or high voltage.

# Remote Control for this TV

# Getting into service menu

While pressing the Vol-up and Ch-up buttons at the sametime, plug the AC cord into a wall socket.

# Pictures of the mod

# Games

NES Adventure Island

NES Adventure Island Close up

SNES Contra Alien Wars

Game menu overlay (mux in action)

Genesis 2 Sonic The Hedgehog

XBOX Unleash X menu

# Patterns

Text from FXPAK Pro

Grid

SMPTE Color Bars

# Neck board ground wire mod

The ground wire from the tube is soldered to the neck board, which makes it difficult to remove the board entirely from the CRT. While, this may not be necessary for this RGB mod, it definitely makes it easy to connect/disconnect the ground wire attached to the tube. I found the cable and the pin from another CRT that was going to be recycled.

Neck board back

Neck board pin soldered

Tube new wire soldered

Neck board ground attached

# Pictures of the set

Back label

# Swapped tube

Originally this late 90s set came with the following tube: CPJ370BVBK1S

However, it can be replaced with the newer tube: 37GDA86X. It works without any issues.

# Service menu settings

# CJ13M10

TV1

TV2

# Pictures

📷 See more photos and contributions →open in new window