For Service Technician Use Only
DIAGNOSTICS
French-Door Bottom Mount Refrigerator
n
1-7
Theory of Operation
Power Distribution
Overview
The refrigerator components operate at 115 VAC, 140 VDC, and
various DC low voltages.
This section describes how power is supplied to the refrigerator
and distributed to the control boards. The control boards provide
power output to individual components.
Power Supply
Power is supplied to the refrigerator by a plug and is filtered
through an Electromagnetic Interference (EMI) filter. The EMI
filter prevents electrical interference from entering or leaving the
refrigerator over the power cord.
The EMI Filter is located in the machine compartment. It is
attached to the cover of the Orion Assembly.
The power cord mates to the EMI filter through a 4-pin
connector. Pin 3 (Line) and Pin 4 (Neutral) supply power from the
power cord to the EMI Filter. The 120 VAC output of the EMI filter
leaves the filter at Pin 1 (Line) and Pin 2 (Neutral) and is routed to
the Orion board Connector P1.
Orion High Voltage Board
The Orion board is attached to the left rail in the machine
compartment. The board receives 115 VAC power and uses it to
power loads and distribute power to other control boards (Refer
figure on Page
).
P1
1 2 3
4
ORION BOARD
P1
NEUTRAL
BK (SMOOTH)
BK (RIBBED)
POWER CORD
LINE
GROUND
EMI
FILTER