Samsung RF32FMQDBSR/AA, RF32FMQDBSR/AA, Service Manual, Page: 117 / 127

117
REFERENCES
✽ Glossary
Terminology Description
LED
LED stands for Light Emitting Diode.
An LED is a semiconductor device that emits visible light when an electric current passes through it.
Tx, Rx
This refers to the communication ports of the micom.
TX : Transmit signal. RX : Receive Signal.
Driver IC
The IC used to electrically drive devices.
(Power supply type - Source, power cut-off type-Sink)
Micom
This is also called a Micro Computer. It can be viewed as a small computer on a single chip that consists of a
ROM where the program is stored, RAM where the data are stored, and ALU that calculates, I/O, Interrupt, etc.
Connector The connector that connects a separate load and circuit.
Resistor This is used to suppress the current in the circuit or to distribute voltages.
PCB
This stands for Printed Circuit Board and is used to mechanically support and electrically connect electronic
components using conductive pathways, tracks or signal traces etched from copper sheets laminated onto a
non-conductive substrate.
Single-Sided PCB A Printed Circuit Board that only has conductive pathways on one side of the substrate.
Double-Sided PCB A Printed Circuit Board that has conductive pathways on both sides of the substrate.
SCR SSR SCR Silicon Control Rectifier, SSR Solid State Relay (Electrical Contact Relay)
TR Transistor --- An amplification device using the electric conduction of semiconductor crystals.
Varistor
This stands for Variable Resistor.
There are symmetric varistors whose resistance is determined by the voltage only regardless of the polarity of
the voltage and asymmetric varistors whose resistance is determined by the polarity of the applied voltage.
Compressor
Compressor - A mechanical device that compresses gas to increase the pressure of the gas. In general, the
compressor used for refrigerators is a reciprocating compressor that uses pistons driven by a crankshaft that is
rotated by the motor to deliver gas at high pressure.
Inverter
A device that converts DC to AC.
This device converts direct current voltage (or current) to alternating current voltage (or current) that is required
to drive a motor.
Alignment
This refers to the process that generates a rotating magnetic field in a direction to align the location of the rotor
to the rotating magnetic field when starting a motor. In general, to drive a motor, the rotor location must be
identified (except V/f) but the location of the rotor cannot be easily identified before starting the motor. Therefore,
a process to locate the rotor at a specific position by force is required and this is called alignment.
Activation
A valid signal status
This represents the Low status for an activation low signal and the High status for an activation high signal.
Deactivation
An invalid signal status
This represents the High status for the activation low signal and the Low status for the activation high signal.
Bootstrap Capacitor
The capacitor that stores the power voltage to drive the High-Side Power Switch of the SPM.
A 3-Phase Full-Bridge Inverter consists of 3 capacitors. By turning on the Low-Side Power Switch for a pre-
determined period of time just before the motor starts, the capacitors are charged.
SPM
Smart Power Module
Although this was originally the model name for a product, it now refers to a power semiconductor package that
has an inverter function including a switching device, a driving circuit of the switching device and a protection
circuit.
PWM Pulse Width Modulation
RPM
Revolutions Per Minute
This refers to the number of rotations per 1 minute.
RPS
Revolutions Per Second
This refers to the number of rotations per 1 second.