15
Service Manual for
RCO Speed Oven
5. Adjust the controller forward and backwards so that
the trailing edge of the EMI shield contacts the back
edge of the door.
EMI
Shield
Controller
Box
Screw
Door
Controller
Door Touching EMI Shield
6. Tighten the 2 controller box screws.
7. Allow the oven to cool below 150 °F (66 °C), unplug
the oven and replace the top and side panels.
8. Heat the oven to 500 °F (260 °C)
9. Perform a Microwave Leakage Test (as described
on page 32) to validate proper functionality.
SIGNAL TRANSFORMER
Before performing any service that
involves electrical connection or disconnection
and/or exposure to electrical components, always
follow the Electrical LOCKOUT/TAGOUT Procedure.
Disconnect all circuits. Failure to comply can
cause property damage, injury or death.
The Signal Transformer is located on the upper left side
of the oven just behind the Control Panel.
The Signal Transformer provides low voltage to the
Control Panel.
Signal
Transformer
Location of Signal Transformer
Operational Testing
With a 208 / 240 VAC on the Primary winding (input),
the measured voltage across the entire Secondary
winding (output) should be approximately 24 VAC.
The voltage across either outer terminal and middle
terminal should be approximately 12 VAC.
A short to ground can be measured by testing for
continuity between each individual terminal and ground.
1. Remove the unit from its power source and follow
the proper Lockout/Tagout procedures.
2. Remove the top panel.
3. Tag and disconnect Signal Transformer wires.
4. Remove the Signal Transformer.
5. Install the replacement Signal Transformer.
6. Briefly restore power to the unit and ensure the
Control Panel is operating.
7. Remove the unit from its power source and reattach
the top panel.
8. Restore the unit to its power source and ensure it
is operating properly.
DOOR SWITCHES
Before performing any service that
involves electrical connection or disconnection
and/or exposure to electrical components, always
follow the Electrical LOCKOUT/TAGOUT Procedure.
Disconnect all circuits. Failure to comply can
cause property damage, injury or death.
The Monitor Switch and Primary Interlock switches are
located on the upper right side of the unit.
