Fig. 4.12.2 - Quickie QM-7 Series Service Manual

Note: If the tilt actuator does not operate, it is only possible to check for one condition. Pick
the condition below that best describes the position of the tilt system.
9. Example 1, Tilt in mid-stroke.
continuity between the pins indicated (fi gure
4.12.2) this is the resistance through the actuator
motor windings (Figure 4.12.1). If this reading is
not correct, replace the tilt actuator and retest.
Note: The value recorded in one direction is the forward resistance through a diode and will
vary with the type of Multimeter used. This value is not important, as long as there is continuity
in one direction only. The value recorded in the other direction is across the open contact of
the end of stroke micro-switch and should be open.
10. Example 2, Tilt in full down position (Figure
4.12.3). If the readings are not correct, replace
the tilt actuator. Refer to Tilt Actuator and Micro-
Switch Removal section this manual. Retest as
necessary.
Note: The value recorded in one direction is the forward resistance through a diode and will
vary with the type of Multimeter used. This value is not important, as long as there is continuity
in one direction only. This value may even be high. The value recorded in the other direction
is across the open contact of the end of stroke micro-switch and should be open.
11. Example 3, Tilt in full up position (fi gure
4.12.4). If the readings are not correct, replace
the tilt actuator. Refer to Tilt Actuator and Micro-
Switch Removal section this manual. Retest as
necessary.
PAGE 4.12
JANUARY 2012
Section 4
Measure

fig. 4.12.2

QM-7 SERIES SERVICE MANUAL
Positive probe here
Negative probe here
Continuity between pins
Negative probe here
Positive probe here
Open between pins
*SEE NOTE*
Positive probe here
Negative probe here
Open between pins
Negative probe here
Positive probe here
Continuity between pins
*SEE NOTE*
SUNRISE MEDICAL
fig. 4.12.1
fig. 4.12.3
fig. 4.12.4