Jersey Jack Pinball The Hobbit, Operation Manual

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Game Service & Troubleshooting E-14
E.6
Replacing Your Game’s CPU Battery
Loosen
Loosen
Lift this side
Slide
Slide
1
1
2
3
3
Figure E16. Removing PCB chassis lid.
Your game’s CPU board uses a 3V coin cell, lithium battery (CR2032) to maintain its basic input/out-
put system (BIOS) settings when the game is powered down. If these settings are lost, the CPU will
not boot when the game is powered up. The life expectancy of the CR2032 battery is approximate-
ly three years. It is important to change your game’s CPU battery before it discharges below 3V.
However, in order to preserve the CPU’s BIOS settings, the change must be made while the game is
powered on. A step-by-step process for replacing the battery is provided below.
1)
Power the game on and remove the playfield glass (see pg A-7). Leave the coin door open.
2)
Lift the playfield up out of the cabinet and lean it up against the backbox (position 4, pg A-9).
3)
Remove the lid of the Cabinet PCB Chassis (see figure E16): Loosen the two captive thumb-
screws on the lid of the Cabinet PCB Chassis. Lift the left edge, slide the lid to the right and
lift upward to remove it. CAUTION : Be very careful not to drop anything inside the PCB chassis!
4)
Locate the CPU board (upper right corner of the PCB chassis), then the shiny, CR2032 coin cell
battery & holder mounted on its surface (see figure E17). Note the orientation of the battery in its
holder (with the battery label/imprint facing outward ).
5)
Cut a 3-inch long piece of masking tape and fold it 1 inch from the end. This should form a 1-inch
long “handle” and leave a 1-inch long adhesive end.
6)
Briefly touch the lockdown bar receiver on the game to dissipate any static charge in your body
before touching the CPU board.
7)
Carefully affix the adhesive portion of the tape onto the top of the CR2032 battery, applying
moderate pressure. WARNING : Do not flex the CPU circuit board! Rub the surface of the tape,
back and forth, to ensure that it attaches well to the battery - not the holder.
1 2 3 4
1 2 3 4 1 2 3 4
Figure E17. CPU board and battery locations.