2.3 The Head Down Function Does Not Work
Chapter 2: Troubleshooting Procedures
Page 2 - 22 Century+™ Bed Service Manual (man241)
Yes No
↓→Go to step 13.
11. Go to step 27.
12. Check the fuse at the power outlet (common) side in the transformer box
(see figure 3-4 on page 3-5). The fuse is good.
Yes No
↓→Replace the fuse. If this solves the problem, go to “Final
Actions” on page 2-7. Otherwise, go to step 13.
13. Check the fuse at the inlet power (primary side) (see figure 3-4 on page
3-5). The fuse is good.
Yes No
↓→Go to step 17.
14. Go to step 27.
15. Perform the following:
a. Set your VOM to read volts DC.
SHOCK HAZARD:
Use extreme care when checking live voltage. Do not touch live
terminals, wires, or ground. Failure to use caution could result in
serious electrical shock injury.
b. At P3, measure the voltage for the head motor (pins 5 and 6) (see figure
3-4 on page 3-5).
c. The voltage is 12V DC +3V.
Yes No
↓→Go to step 17.
16. Replace the cable from the control board to the head motor. If this solves
the problem, go to “Final Actions” on page 2-7. Otherwise, go to step 27.
17. Replace the control board (see “Control Board” on page 4-5) The head
down function now operates properly.
Yes No
↓→Go to step 27.
18. Go to “Final Actions” on page 2-7.
19. Perform the following: