Midway Off Road Thunder Operation Manual

Wiring & Circuit Information          4-21
Wheel Driver Board Schematic, 3/8 

Wiring & Circuit Information          4-22
Wheel Driver Board Schematic, 4/8 

Wiring & Circuit Information          4-23
Wheel Driver Board Schematic, 5/8 

Wiring & Circuit Information          4-24
Wheel Driver Board Schematic, 6/8 

Wiring & Circuit Information          4-25
Wheel Driver Board Schematic, 7/8 

Wiring & Circuit Information          4-26
Wheel Driver Board Schematic, 8/8 

Servicing          5-1
O
OO OFFROAD
FFROADFFROAD FFROAD
THUNDER
THUNDERTHUNDER THUNDER 
    TM
CHAPTER
5
SERVICING
NOTICE: 
The term VGM refers to the video game machine.
NOTICE: 
Avoid damage to electronics! Turn off VGM power before servicing circuit
boards or any electronic assembly. Never “hot plug” circuit boards.
CAUTION:
 Static electricity builds up on your body. This static can damage or destroy
sensitive circuits. Before touching or handling electronics, discharge static electricity by
touching...

Servicing          5-2
DISASSEMBLY & REASSEMBLY
This chapter includes summarized procedures for disassembling and reassembling VGM components.
Only qualified service personnel should repair VGM equipment. The following product guidelines apply to
all video game operators and service personnel. Notes, cautions and warnings appear throughout this
manual where they apply. Study the Safety pages before beginning service.
• 
Arcade Computer
Switch off power to the VGM.
Open and remove the rear door.
The...

Servicing          5-3 board sockets. Carefully pry up the battery retaining lever. Then grasp the battery edges and remove
the device. Set the battery aside.
Note the “+” marking on one side of the replacement battery. W hen you install a battery, this “+”
marking must face the battery retaining lever. After replacing the battery, set the system clock to the
correct date and time. Also enter the Menu System and check or update system adjustments as
necessary.
• 
Coin Counter
Meter replacement requires...

Servicing          5-4   Remove the CPU Board power cables at the CPU Board. Remove the circuit board retention bars.
Disconnect the hard drive power and data cables at the disk drive. Remove CPU Board mounting
screws. Lift the circuit board out of the cabinet. Use anti-static packaging from new parts to store
boards that you won’t reinstall.
• 
Dashboard and Steering Mechanism
Switch off power to the VGM. Unlock and
remove the rear door. From inside the
cabinet, disconnect the dash cables. Sit in the...