GE SCB2000 Technical Service Guide

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As was the case with thermal compensation, the
control is provided by the thermistor and smart
board, with the thermistor sensing the oven cavity
temperature and the smart board providing the
proper responses to lower all power levels to 7.
GEA00429
SMART BOARD
CN6 CN4 CN2
OVEN CAVITY THERMISTOR
AND SMART BOARD
Thermal Safety
In the unlikely event that internal oven cavity
temperatures exceed 600°F, speedcooking
operation will be terminated.
The oven cavity thermistor is constantly sensing
oven cavity temperatures and providing input to
the smart board. When the smart board
determines that over 600°F has been reached, it
will terminate speedcooking operation and return
the oven display to its normal OFF position (with
time-of-day clock showing in the display). When
the unit cools, it will return to normal operation.
Thermal safety provides an additional means of
thermal protection, in addition to the thermal
protection mode mentioned in the previous
section.
Damper Door Assembly
The damper door assembly has a metal semi-
round door, which rotates by control of a damper
motor, to open and close off air from the damper
chamber to the oven cavity. The thermal fuse and
door sensing switch mount to the damper door
assembly.
GEA00430
THERMAL
FUSE
DOOR
SENSING
SWITCH
DAMPER
MOTOR
During microwave oven cooking, the damper door
is fully open, allowing air to travel through and
around the magnetron tube into the oven cavity.
GEA00431
DAMPER
DOOR ASSY
DAMPER DOOR SHOWN IN OPEN
POSITION ALLOWING AIRFLOW
INTO OVEN CAVITY
During speedcooking operation (recipe or manual
speedcook), the metal damper door rotates into
the damper chamber, closing off air flow from the
magnetron blower into the oven cavity. In doing so,
heat from the oven interior is contained in the
oven cavity.
Damper Door Switch
The damper door sensing switch is mounted to
the damper duct. The switch monitors the metal
door position and provides this information to the
smart board (“Metal damper door open” or “Metal
damper door closed”), which controls the direction
and operation of the damper door motor. If the
damper door sensing switch shorts (or opens), the
damper motor will continually cycle the damper
door open and closed until one complete switch
cycle is detected.

GE SCB2000 Specifications

General

Brand	GE
Model	SCB2000
Category	Oven
Language	English