Chapter 4: Troubleshooting
Troubleshooting Definitions and Acronyms
4-44 Service Manual
4.5 Troubleshooting Definitions and Acronyms
Term Definition
PCA Printed Circuit Assembly.
PCB Printed Circuit Board.
LCD Liquid Crystal Display.
Mains AC Electric Power Source.
DMM Digital Multi-Meter. An electronic measuring instrument that combines
several functions in one unit.
Digital Multimeter An electronic instrument that measures electrical resistance.
PE Protective Earth Grounding Point.
FE Functional Earth Grounding Point.
E-Base Elevating Base.
T-Stat Thermostat.
POST Power-On Self Test.
Heat Control Processor Microcontroller located on the Power PCA that controls the radiant heater.
Main Application
Processor
Microprocessor located on the Control PCA that provides system
communication, control, and user interface.
Audio Processor Microcontroller on the Control PCA that provides Audio and Power Fail
functions.
NCAS Processor Microcontroller on the Alarm/Light PCA that provides Hands-Free Alarm
Silence and Procedure Light control.
HFAS and NCAS Hands-Free Alarm Silence and Non-Contact Alarm Silence (both refer to the
same feature).
Probe Panel Interface
Board
Flexible Printed Circuit Assembly used to connect the rail harnesses to the
Control PCA.
SpO
2
Flex Circuit Flexible Printed Circuit Assembly used to connect the SpO
2
I/F PCA to the
SpO
2
Probe Panel Connector.
HP Alarm High Priority Alarm - rapidly repeating two-tone alarm.
LP Alarm Low Priority Alarm - single-tone alarm repeating every X seconds.
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