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Troubleshooting
The Secure 3000 has only two main printed circuit boards in the litter (a CPU and a power PCB), two switch
boards in each siderail, and one interface switch board at the foot board. Because of this design, isolating
a “board failure” requires minimal troubleshooting time.
NOTE
Additional option boards may include a head wall interface board in the litter for Nurse Call, a Bed Exit switch
board, a scale switch board and lCD at the foot board control panel for Bed Exit and Scale options, a DMS
power supply and interface board in the litter, and a DMS switch board in each siderail for the DMS mattress
option.
A general reason for troubleshooting a bed is to isolate a problem to the appropriate PCB. To do this as quickly
as possible, it is important to understand where the boards and cabling are locate and what the responsibility
and voltage requirements are for each connector on the boards. The following troubleshooting section is very
valuable if used properly. Pages 34–41 display an overhead view of the litter to locate and identify all electrical
components and wiring and the replacement part numbers for each component. Pages 42–52 show the litter
circuit boards and identification of each connector, the cabling location as it is identified on the board and the
corresponding cable, the proper voltage for each pin, where to attache the voltmeter’s positive and negative
leads and what the voltage represents (description). The description column will guide you to the appropriate
connector for voltage verification.
MAIN LITTER BOARDS
CPU BOARD P/N 3001–307–910
The CPU/control board is the “mother board” of the bed. It contains no primary voltages. It contains secon-
dary voltages for the foot board, siderails, Nurse Call interface, downward motion interrupt system, weigh
system load cells, and switch board signalling for the relays on the power board for electrical motion. It also
contains all the bed’s logic capabilities and limit information.
POWER BOARD P/N 3001–300–910
This board contains primary voltages. It receives secondary voltage signals from the CPU to activate its re-
lays for bed motion. It also receives the main power from the power cord and provides the power for the Fowl-
er, Knee Gatch, Bed Lift motors, 110V outlet, Night Light and DMS power board. It has a transformer and
voltage regulators and also contains the bed’s main power fuses.
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