GE CareScape V100, Service Manual

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2-16 CARESCAPE V100 Vital Signs Monitor 2048723-002C
Equipment overview: Functional description
Printer
The printer receives power from the Main Board and communicates with the
primary processor. Printer presence and print head temperature is indicated by
PR_TH signal to the primary processor. When a print command is sent to the
printer from the primary processor, the following will occur:

PR_CLK signal - transfer the data into print head

PR_DI signal - serial dot to be printed

PR_LAT signal - latch the data stream into the head

PR_ST1-6 - cause the head to print various sections

PR_M1-4 signals - control power sequentially to the two stepper motor
windings
Together these signals (CONTROL DATA) cause the printer to print a graphic
hardcopy of the patient vital sign values and trend data. It also causes the
printer to print a hardcopy of error logging and service record data.
The printer has a built-in sensor to monitor the printer paper presence. When the
printer is out of paper, it sends a PAPER OUT signal to the primary processor.
Pneumatics
The pneumatics consists of a pump, a deflate valve, and a dump valve. The
pneumatics inflates/deflates the cuff during NIBP determinations. During normal
operation the pneumatics are controlled by the primary processor. If a FAILSAFE
mode or overpressure condition occurs, the NIBP processor provides the
appropriate control signals to ensure a safe condition, where the cuff vents to
ambient atmosphere pressure.
Optical switch
The optical switch indicates whether the Alaris temperature probe is inserted in
the probe holder or not. The Main Board powers the switch.