Repair & Schematics
Game Gear

Model Versions (Game Gear)

2min

Model Number

Country

Type

ASICs

Year

837-7398-01

Japan

VA0

IC3 315-5378 IC2 315-5377

1990

837-7398-03

Japan

VA0

IC3 315-5378 IC2 315-5377

1990

837-7996

Europe

VA0

IC3 315-5378 IC2 315-5377

1991

837-7719

USA

VA0

IC3 315-5378 IC2 315-5377

1991

837-9024

Taiwan

VA1

IC1 315-5535

1992

837-9024

USA

VA1

IC1 315-5535

1992

837-9130

Japan

VA1

IC1 315-5535

1992

837-9130

Europe

VA1

IC1 315-5535

1992

837-8560

Japan

VA2

IC1 315-5535

1992

837-9537-01

USA / Made In Taiwan

VA4

IC1 315-5682

īģŋ

837-9537

USA / Made In Taiwan

VA4

IC 315-5682

īģŋ

837-10766

USA / Made In Taiwan

VA5

IC1 315-5682

īģŋ

837-10766

USA / Made In Japan

VA5

IC1 315-5682

īģŋ

1998 171-7923A

Made In Korea

VA5

IC1 315-5682

1998

VA0 are what we typically call 2-ASIC (as they have 2 ASICs)

VA1/2 are what we typically call 1-ASIC (as they have 1 ASIC)

VA4/5 are typically called Majesco (made much later, with single but newer ASIC) and 9bit color (instead of 12bit)

CleanScreen Color Modes

As the CleanScreen uses CSYNC for its video timing, there are several color modes you can select with the CleanScreen, depending on the ASIC version, by setting the color toggle switch and DAT5 on the CleanScreen board.

Color Switch

DAT5

ASIC

Color Mode

Up

0V

IC3 315-5378 (9037KK015) IC3 315-5378B IC1 315-5535 (9309KX245)

Mode 1

Up

5V

IC3 315-5378A (9110PK016) IC3 315-5378A (9108EK204)

Mode 2

Down

0V

īģŋ

Mode 3

Down

5V

īģŋ

Mode 4

If you have the wrong color mode selected, using Sonic 2 as an example, you will see either red instead of blue for sonic, or green instead of blue, or sometimes slight horizontal lines.