Chapter Three – Troubleshooting Guides
48
3.9 BED MOTION LOCK AND INDICATOR 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.
PROBLEM/SYMPTOM
SOLUTION(S)
Bed motion lock does not prevent bed motion.
Bed motion lock LED indicators not illuminating.
A. Check for +5 VDC at connector P1, pin 6 of the
foot board keyboard (p/n 3000–500–943) (see
page 202 for board location). If voltage is present,
use a voltmeter and verify switch, LED 2 and LED
7 are O.K. If switch or LED’s are not O.K., replace
keyboard.
B. Check foot board IFC (p/n 3000–500–955) for
+5 VDC at connector P2, pin 6. Pin 7 may be
used for digital ground reference (see page 202 for
board location). If voltage is not present, check for
+8 VDC at connector P3, pin 5. If voltage is not
present, replace foot board IFC .
C. If bed motion lock and/or LED indicators are not
functioning properly, check litter CPU board (p/n
3000–300–941) for +8 VDC at connector P9, pin
5 (see page 199 for board location). If voltage is
not present, check fuse F1. If the fuse is O.K. and
the problem still exists, check for 110 VAC at con-
nector P1, pin 18. If 110 VAC is present, replace
litter CPU board. If 110 VAC is not present, check
power junction board (p/n 3000–300–961) at con-
nector P1, pin 1 for 110 VAC (see page 199 for
board location). If voltage is not present, check
fuse F1. Replace fuse, if necessary. If fuse is
O.K. and 110 VAC is not present at connector P1,
check connector J1, pin 2 for 110 VAC input from
power cord. If 110 VAC is present at connector J1
but not at connector P1, replace power junction
board.
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 ...