Hill-Rom VersaCare P3200, Service Manual

Page: 114 / 379

2.65 Junction Board Debugging—IntelliDrive® Transport System
Chapter 2: Troubleshooting Procedures
If the output voltage at P1.1 cannot be adjusted to within 2.4V to 2.6V using
the potentiometer R1, with no force applied to the handles, the strain element
may be damaged. The bed will operate with a single handle after the output is
adjusted. To check the handles, unplug one of the handles and see if R6 can be
adjusted so the output signal is 2.5V. The handle that will not allow adjustment
of the potentiometer to bring the output signal to 2.5V is the damaged handle.
The motor controller will not operate unless it sees the connection to the 4700
ohm resistor on the Junction board. To verify the signal is being received at the
PACM board, unplug the 14-pin cable from the PACM board and measure the
resistance across pins 12 and 13. The resistance needs to measure 4700 ohms
+/- 5%. If this measurement fails check the cable for continuity and inspect the
Junction board. The cable connections are the same on both ends. If the cable
checks out, inspect the connector P6 on the Junction board. If the cable is bad,
replace the cable, otherwise replace the Junction board.
Page 2 - 80 VersaCare™ Bed Service Manual (MAN333 REV 2)