Stryker 3000 - 3.16 Dynamic Mattress System Troubleshooting

Chapter Three – Troubleshooting Guides
60
3.16 DYNAMIC MATTRESS SYSTEM TROUBLESHOOTING GUIDE – OP-
TIONAL EQUIPMENT
NOTE
Before proceeding, ensure the foot board is properly installed and electrical connections are made. Prior to
replacing any circuit boards, ensure applicable cables and connections are intact (visually and mechanically).
To check for +5 VDC at various points called out in the troubleshooting, use digital ground as a reference point
(negative side of C18 on litter CPU board). When measuring 110 VAC at any point, use only the neutral (white)
side of the power line as a reference point. DO NOT use digital ground as a reference point when measuring
110 VAC.
PROBLEM/SYMPTOM SOLUTION(S)
DMS does not work when power is switched on.
(Manual LED in foot board and/or siderails does
not light when DMS is switched on.)
A. Check for 24 VDC at DMS Port between pins 1,
6–7 (positive) & pins 3,8 &12 (negative). Pins of
same polarity are tied together in parallel. (See
page 211 for DMS Port location.) Check DMS
power supply board (p/n 3000–302–939) for 24
VDC output at J3. If output of board is O.K. and
24 VDC is not present at DMS Port, replace DMS
port cable (p/n 3000–302–819).
B. Verify 24 VDC output of DMS power supply
board (p/n 3000–302–939) at connector J3, pin 2
using pin 1 as a reference point (see page 199 for
board location). Check DMS power supply board
fuses F1 and F2. If fuses are not O.K., replace as
needed. If 24 VDC still is not present, check 110
VAC into board (J1/J2). If 110 VAC is present and
24 VDC output is not present, replace DMS power
supply board.
C. If mattress runs momentarily when bed is initial-
ly plugged in, check switches and LED’s in foot
board DMS module. Using a voltmeter, check
switches and LED’s in siderail module boards for
+5 VDC at connector J1, pin 1 for both board mod-
ules (see pages 200 & 201 for board locations). If
voltage is present and problem still exists, replace
board(s). (Right DMS module board p/n 3000–
402–903, Left DMS module board p/n 3000–402–
909).
OPEN ZIPPER ON MATTRESS
D. Check cable into mattress and connections in
control unit. Replace cable or control unit, if nec-
essary.
E. Check for 24 VDC at power supply connector
JP6, pin 1 in mattress (see DMS 2500 mainte-
nance manual). Use pin 2 as reference point.
F. Check connections from P2 of serial IFC board,
through foot board IFC board (p/n 3000–500–955)
and then to foot board DMS module. Replace
cable and board assemblies, if necessary.