Jersey Jack Pinball Dialed in!, Operation Manual

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Game Service & Troubleshooting E-11
E.7
Replacing Your Game’s CPU Battery
2 2
3 3
Figure E12. 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)
With the game off, open the coin door and locate the keys to the backbox lock (hanging on a
hook, alongside one of the coin mechanisms). Unlock the backbox lock (item 2 on pg C-45), slide
the backglass upward and remove it, bottom edge first. Carefully set it aside.
2)
Release the 27" LCD monitor, by lifting the two latches, top left & right (red arrows, figure E12),
while carefully pulling the screen straight out of the backbox. Extend the screen outward, then
swing it over to either side of the backbox.
3)
Disconnect the Backbox LED Strip cable (left, inside of the backbox) and free the loose end from
the nylon cable clamp(s). Remove the lid of the Backbox PCBs EMI Shield Enclosure by removing the
four HWH Phillips machine screws (circled in red, figure E13); set the lid and the four screws aside.
4)
Locate the CPU board (upper right corner of the EMI shield enclosure), then the shiny, CR2032
coin cell battery & holder mounted on its surface (red arrow and circle, figure E13). Note the orien-
tation of the battery in its holder (with the battery label/imprint facing outward ).
5)
Power the game on and wait for it to complete its boot cycle. 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 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.
Figure E13. CPU board and battery locations.