McWill SEGA Game Gear LCD Replacement MOD REV4.0 Instruction Manual
- June 10, 2024
- McWill
Table of Contents
SEGA Game Gear LCD Replacement MOD REV4.0
Quick Guide PCB Revision 837-9130 / 837-9024 / 837-8560 (1 ASIC)
ATTENTION ! Installing the LCD replacement is on your own risk! Your Game
Gear could be damaged, if you are not able to do this modification!
Liability impossible!
Required materials:
GG-kit, VGA connector with screws, 24 wires round about 15 cm (6 inches)
length (old IDE cable)
Step: Remove not needed Parts and 5 Volt check
ATTENTION ! Make sure that all power is off. Disconnect ALL cables.
- Remove R33, R34, R32, R57, R56, R41, R38, R44 and R43 (9 resistors)
- Remove L2 coil
- Remove Q6, Q4 and Q3 transistors
- Remove C69 and C70 capacitors
- Remove LCD; peel off the ribbon cable carefully from the GG PCB like tape
- Remove middle plastic screw-mounting of the upper housing with pliers
- Remove CFL Lamp and fuses FU1 and FU2
- Replace R13, R14, R15 and R16 with 0 Ohm / bridge
!!! Now check the 5 Volt with a voltmeter at VCC / GND of the Game Gear. If the voltage exceeds 5.45 Volt, fix your GG! Otherwise the GG mod will be damaged!
Step: VGA connector (if needed)
Connect the pins 6, 7 and 8 together.
Solder 6 wires to the pins 1, 2, 3, 13, 14 and (6, 7, 8) to the VGA connector.
!!! Use hot glue for the internal screws of VGA connector. Otherwise the
screws may cause short circuit !!!
!!! ATTENTION !!!
Don’t damage the ribbon cable / FPC of the LCD !
You may disconnect the FPC, but don’t forget connecting it correct after
soldering.
Step: Slide the GG mod onto the GG PCB and solder data lines
First solder 1 wire to VCC of the GG mod and 1 wire to GND of the GG mod and
leave the other ends. Now slide the GG mod onto the Game Gear PCB and solder
the 2 wires VCC and GND of the GG mod to the Game Gear PCB. DON’T MIX THEM
UP!!! Solder 1 wire from T10 to the lower pad of R23 on the GG Board.
Now solder 1 wire from CLK_32MHz of the GG mod to FB1 on the Game Gear PCB.
Then solder 1 wire from GG / SMS of the GG mod to PIN 42 of the Game Gear
cartridge port.
Solder also 1 wire from TV of the GG mod kit to PIN 43 of the Game Gear
cartridge port.
Solder 4 wires from BUT1, BUT2, BUT3 and BUT_UP of the GG mod to BUT1, BUT2,
BUT3 and BUT_UP of the Game Gear PCB.
(If you don’t use the VGA out, you don’t need to solder the wire BUT_UP).
Solder 1 wire from BACKLIGHT (BL left) of the GG mod to PIN1 of the thumbwheel
and 1 wire from BACKLIGHT (BL right) of the GG mod to PIN 2 of the thumbwheel.
Then solder 1 wire from CSync of the GG mod to T2 of the GG PCB.
Last step is to solder 6 wires from the old LCD ribbon CL2 (PIN9), D1 (PIN16),
D0 (PIN18), DW (PIN20), D2 (PIN39) and D3 (PIN57) to CL2, D1, D0, DW,
D2 and D3 of the GG mod. !!! At last check all connections again !!!
You can switch scanlines, retro-style and scaling ON / OFF by pressing the
buttons START, FIRE1 and FIRE2 together and hold. For switching to VGA mode
you need to hold START and button UP. — BTW: If you want to use an 3.5″ IPS
LCD, put a solder blob onto jumper JMP1! —
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