Shared Projects by AmiSapphire

~This is the through hole version of the board. Original SMD version, Hand Solder SMD Version.~

A take on Helder’s own MD2 composite video fix, only using the onboard clock signal fed on R61 instead of using a separate crystal oscillator. Composite video clock fix for Model 2 Sega Genesis consoles for the following:

• Motherboards with VA0, VA1, VA1.8 revision

• Samsung KA2195D video encoder

Instructions: Twitter thread for now. SMD, but still relevant.

Notes:

• This particular PCB should use 1/8W resistors.

• Removal of the original 10K resistor on R61 is required.

• R61_L is +2.5V as VREF, connecting to SBCR.

• R61_R is GND, connecting to C24, then KA2195 pin 6.

~This is the hand solder SMD version of the board. Original SMD Version, Through Hole Version.~

A take on Helder’s own MD2 composite video fix, only using the onboard clock signal fed on R61 instead of using a separate crystal oscillator. Composite video clock fix for Model 2 Sega Genesis consoles for the following:

• Motherboards with VA0, VA1, VA1.8 revision

• Samsung KA2195D video encoder

Instructions: Twitter thread for now.

Notes:

• This particular PCB uses Imperial 1206 size SMD components.

• Removal of the original 10K resistor on R61 is required.

• R61_L is +2.5V as VREF, connecting to SBCR.

• R61_R is GND, connecting to C24, then KA2195 pin 6.

~This is the original SMD version of the board, which is not as easy to hand solder; therefore they can be used for wave-soldering or a solder heat gun. Hand Solder SMD Version, Through Hole Version.~

A take on Helder’s own MD2 composite video fix, only using the onboard clock signal fed on R61 instead of using a separate crystal oscillator. Composite video clock fix for Model 2 Sega Genesis consoles for the following:

• Motherboards with VA0, VA1, VA1.8 revision

• Samsung KA2195D video encoder

Instructions: Twitter thread for now.

Notes:

• This particular PCB uses Imperial 1206 size SMD components.

• Removal of the original 10K resistor on R61 is required.

• R61_L is +2.5V as VREF, connecting to SBCR.

• R61_R is GND, connecting to C24, then KA2195 pin 6.