Revision B 120 Series Maternal/Fetal Monitor 10-5
2015590-001
Strip Chart Recorder Servicing: Field Serviceable Assemblies
Field Serviceable Assemblies
Disassembly and/or replacement of most recorder parts normally requires the use of
special gauges and fixtures to ensure critical tolerances are satisfied; this includes
drive roller assemblies. Therefore, field replacement is not recommended and field
servicing is limited to the following recorder subassemblies:
Stepper Motor and Harness
Printhead
Paper-Low Photosensor
Paper-Out Photosensor
Paper-Loading Photosensor
CAUTION
PRINTHEAD FAILURE—If a sudden or complete failure of the
printhead occurs, the exact cause must be diagnosed accurately
and corrected prior to installation of a new printhead.
Servicing of any recorder parts, other than the five subassemblies outlined above,
should be referred to the nearest GE Service Representative.
Stepper Motor and Harness
Prior to removing/replacing the stepper motor, follow all instructions in the section,
“Removing the Strip Chart Recorder”.
Removing the Stepper Motor
1. Disconnect the stepper motor harness cable from the Recorder Board at J4.
2. Loosen the two screws attaching the motor to the frame.
3. Slide the stepper motor sideways to the right and lift out.
Replacing the Stepper Motor
1. Slide new stepper motor into place.
2. Replace the two screws which attach the motor to the frame.
3. Re-connect the stepper motor harness cable to the Recorder Board at J4.
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