WMS Bluebird Series, Service Manual & User Manual

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3
Preventing Injury and Damage
16-020834-00
Preventing
Injury and
Damage
This section provides instructions for preventing electrical injury and protecting components from
ESD damage.
Prevent Shock and
ESD
Depending on the procedure, one or more of the measures listed below must be taken
to prevent
electrical shock and/or electrostatic discharge (ESD) when servicing the game.
Power Game or Top Box OFF at the Power Switch
The game and, if applicable, the Top Box, have a red Power Switch that must be set to OFF when
servicing the game.
ESD Wrist Strap
Fasten a resistive type (1 or 10 Meg) ESD wrist strap on arm and ensure that it makes good skin
contact,
Figure 1-1 (A). Secure the clip end of the wrist strap to a ground braid on a game.
Figure 1-1 ESD Wrist Strap on arm.
Disconnect Power Cord from Game (When not Handling ESD-Sensitive Equipment)
Disconnect the Power Supply Cord from the Power Entry Assembly, Figure 1-2 (A), and, if
applicable, the Top Box Line Cord from the outlet. If one is installed, remove the Hopper to access
the Power Entry Assembly.
WARNING: Disconnecting the game Power Supply Cord is the only means of disconnecting the
game from power.
Figure 1-2 Power Supply Cord plugged into Power Entry Assembly.
Special Instructions
for PCBs
Whenever accessing any printed circuit boards (PCBs) or components in direct contact with
PCBs, including EPROMs, CompactFlash® Cards, and PCB connectors, use the following
procedure to prevent ESD damage to sensitive components.
CAUTION: Opening the game and unplugging the Power Supply Cord defeats the grounding
system on the game, as the grounding pin on the Power Supply Cord ultimately connects the game
to ground.
1 Verify that the game power switch is set to OFF.
2 Verify that the ESD wrist strap is firmly secured to a game ground braid.
3 Connect/reconnect the Power Supply Cord to the Power Entry Assembly.
4 Complete all necessary PCB or component handling steps.
5 If additional steps are required for this procedure, ensure the game power switch is still set to
Off, and disconnect the game Power Supply Cord before proceeding.
A
A