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Hood TCO (Thermal Cut out)
• Location - On the base behind the control panel.
(See
Below.
)
• Used to turn on the ventilation fan motor if the
bottom of the microwave gets too hot.
• When switch is open, 5 VDC can be read on the
Smart Board between pins 1 and 2 of CN20.
When switch is closed, voltage goes to 0 VDC.
• Normally
open.
• Closes at 158°F, opens at 122F.
Hood TCO removal:
1. Pivot the Control Panel Assembly out from the
oven. (See
Control Panel Removal.
)
2. Disconnect wiring to the Hood TCO.
3. Remove the Phillips-head screw that attaches
the Hood TCO to the oven. Pull the TCO forward.
Hood TCO
Disconnect
Disconnect
Upper Heater Interlock Switch
•
Attached to the latch bracket.
(See picture in
Door Switch Removal
section.)
• Switch functions as an interlock for the upper
heaters. Upper heaters are disabled when the
door is open.
• Switch is closed when door is closed and open
when door is open.
To remove the upper heater interlock switch:
(See
Door Switch Removal
.)
Monitor Switch
•
Attached to the latch bracket.
(See picture in
Door Switch Removal
section.)
• The switch is intended to render the oven
inoperative by means of blowing either of the
20-amp fuses on Noise Filter 1. This occurs
when voltage is applied to the High Voltage
Transformer and the Monitor Switch is closed.
This creates a direct short between line and
neutral.
• Switch is closed when door is open and open
when door is closed.
To remove the Monitor Switch:
(See
Door Switch Removal
.)
Primary Interlock Switch
•
Attached to the latch bracket.
(See picture in
Door Switch Removal
section.)
• Switch functions as an interlock for the high
voltage section.
• Switch is closed when door is closed and open
when door is open.
• If the primary interlock fails to close, the high
voltage, Turntable Motor, and Convection Fan
Motor will not operate.
To remove the Primary Interlock Switch:
(See
Door Switch Removal
.)