Service manual

Revision D 2-3
Equipment Overview : General Description
Series 2000 Treadmill
409110-004
General Description
Standard features include the emergency stop switch, a full handrail set,
and a long, 60-inch walking surface. Designed for simplified
serviceability, the Series 2000 Treadmill has fewer moving parts than
other treadmills, built-in self-calibration, and easy-to-replace
assemblies.
Intended Use
The Series 2000 Treadmill is intended for use with any one of the several
Marquette Medical Systems exercise testing systems or the MTC-1
(manual treadmill controller) for administering a controlled exercise
load during a diagnostic stress test.
The emergency stop switch is intended for emergency situations where
immediately stopping the treadmill is required to deliver appropriate
emergency care to the patient or health care provider, as implied by the
American Heart Association “Guidelines for Clinical Exercise Testing
Laboratories” (1995). It is not intended for routinely stopping the
treadmill.
Motor Drive System
The 3 HP, brushless, DC motor is controlled by a separate control box,
and it connects directly to the front roller with a drive belt. An 11-pound
flywheel, attached to the motor’s drive shaft, keeps “footfall” variance to
a minimum. An “adjustment plate” between the motor and the
treadmill frame contains two bolts for adjusting the drive belt tension.
The increase of horsepower raises the weight capacity from 350 lbs. for
previous treadmills to 450 lbs.
Elevation System
The elevation system uses a rack and pinion operation to raise and
lower the treadmill rather than jack screws and chains. The elevation
motor attaches to a small gearbox that connects to the pinion shaft.
The upper- and lower-limit switches ride along one of the pinion “legs,”
making them easy to reach and adjust. Replacing the elevation motor
only requires the removal of the three mounting bolts and detaching the
motor from the pinion shaft coupling.
Bed Assembly
The one-piece bed assembly, with side rails and struts welded together,
enables quick parts replacement for field service personnel.
Electronic Assembly
An isolated “electronics box” contains the power supply PCB and the
control PCB. The box is instantly accessible with the shroud removed
and can be replaced as a complete assembly.