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Chapter Three – Troubleshooting Guides
46
3.8 SIDERAIL CONTROL PANEL LIGHTS TROUBLESHOOTING GUIDE
NOTE
Before replacing any circuit boards, ensure applicable cables and connections are intact (visually and me-
chanically). 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 CPU litter 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.
Only inner siderail module boards contain control lights (backlight).
Nurse Call module boards (p/n 3000–403–921 and 3000–403–905 inside, right and left siderail) have control
lights which stay lit as long as power is applied to the bed. These lights are not subject to voluntary control.
If the Nurse Call control lights do not light and +5 VDC is present at the board modules, replace boards.
PROBLEM/SYMPTOM
SOLUTION(S)
Siderail control lights do not activate/deactivate.
A. Activate siderail control lights. Check both
siderails for any lights not lit. For any module not
backlit, check module function. Siderail control
lights use the same +5 VDC line in each module
board as the function switches. Thus, if a module
is defective, that module’s control lights may not
light. If not all siderail control lights activate, check
for +5 VDC to unlit modules. Check for +5 VDC at
connector J1, pin 1 for all inside module boards
with the exception of Gatch/Fowler. Check Gatch/
Fowler (inner rail) boards for +5 VDC at connector
P1, pin 10. If +5 VDC is present for unlit modules,
use a voltmeter and verify backlight ground poten-
tial is the same as digital ground. Digital ground
can also be found at connector P1, pin 7 of the
inner Gatch/Fowler boards. Back light ground can
be found at connector J1, pin 2 for all inner rail
modules except Gatch/Fowler and Nurse Call.
Nurse Call uses connector P1, pin 2 for ground.
Gatch/Fowler uses connector P1, pin 8 as back-
light ground. Backlight ground changes to digital
ground potential in the litter CPU board. Nurse
Call does not utilize backlight ground. If +5 VDC is
present at module boards and backlight ground is
at digital ground potential, replace unlit boards.
B. If all siderail control lights cannot be activated/
deactivated by pressing siderail control light
switch, check foot board keyboard (p/n 3000–500–
943) for +5 VDC at connector P1, pin 6 (see page
202 for board location). If +5 VDC is present, use
a voltmeter and verify switch SW1 is O.K. If
switch is not O.K., and/or LED1 does not light, re-
place foot board keyboard.
C. If foot board keyboard is O.K. and problem still
exists, check foot board IFC board (p/n 3000–
500–955) for +5 VDC at connector P2, pin 6 (see
page 202 for board location). Pin 7 may be used
for digital ground reference. If voltage is not pres-
ent, check for +8 VDC at connector P3, pin 5. If
voltage is not present, replace foot board IFC.
Summary of Contents for Secure 3000
Page 78: ...Notes 78 ...
Page 106: ...Notes 106 ...
Page 184: ...Notes 167 2 ...
Page 241: ...Appendix B Circuit Board Locations Bed Wiring Diagrams 222 This page intentionally left blank ...
Page 243: ...Appendix B Circuit Board Locations Bed Wiring Diagrams 224 This page intentionally left blank ...
Page 249: ...DH 3 94 3000 000 020 REV B 420 Alcott Street Kalamazoo MI 49001 ...