Midway 4-Player 25" Dedicated Video Game - Manual (Page 14)

Operation 2-6
•
The TEST MODE Button causes the VGM to enter the service Menu System. Press the TEST
MODE button briefly to run automatic tests. To make game adjustments, press and hold TEST MODE
until the Main Menu appears. Within the Menu System, TEST MODE assumes another function.
There, it selects a menu line item and calls up the item’s submenu. The screen displays this
submenu.
•
VOLUME DOWN and VOLUME UP Buttons set game sound levels. To make minor volume
changes, press either button briefly. To make major changes, press and hold a button. In the Menu
System, VOLUME UP moves the item highlight bar up the menu. VOLUME DOWN moves the item
highlight bar downward.
NOTICE: You must adjust Attract Mode volume independently of Game Mode volume.
For greater profits, increase volume levels to draw attention to this game.
MAINTENANCE
•
Cabinet
Use only non-abrasive cleaners to avoid damaging game graphics. Apply cleaner to a clean cloth or
sponge. Wipe the screen clean with this cloth or sponge. Do not apply cleaner directly on the cabinet!
•
Control Panel
Dirt or debris on the joysticks or buttons can affect earnings. Apply the cleaner to a clean cloth. Use
the cloth to wipe the controls. Don’t apply the cleaner directly to the controls!
•
Viewing Glass
To clean the glass, you don’t need to switch off power to the VGM. Apply a mild glass cleaner to a
clean cloth or sponge. Use this to wipe the viewing glass. Do not apply the cleaner directly on the
glass! Liquid could drip down into switch or motor circuits and cause erratic VGM operation.
SERVICING
Only qualified service personnel should perform maintenance and repairs. The following product
guidelines apply to all VGM operators and service personnel. Notes, cautions and warnings appear
throughout this manual where they apply. Read the SAFETY pages thoroughly before beginning service.
• Circuit Board Set
The VGM computer uses a set of three circuit boards. The three boards include the CPU Board, I/O
Board and Video Board. Switch off power to the VGM. Open the rear door. To expose the circuit
boards, remove their perforated metal cover. Carefully note the orientation of the JAMMA connector
and other cables. Extract the harness and hard disk drive ribbon cable from the board connectors.
Remove circuit board mounting screws. Lift the circuit boards out of the cabinet and set them in a safe
place. Use anti-static packaging from new parts to store boards that you won’t reinstall.