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Testing Procedures
RS2100005 Rev. 0
24
WARNING
!
Disconnect power before performing the following
procedures unless testing requires it.
Circuit Board
Following symptoms indicate a failed circuit board.
• High voltage systems, interlock switches, door
sensing and relay indicate good, but start function fails
to operate.
• Continuously operating with a normal relay.
• Proper temperature measurement is not obtained.
• Buzzer does not sound or sounds continuous.
• Segments of one or more digits do not light, or
continue to light or segments light when they should
not.
• Wrong figures appear in the display.
• All segments light up.
• Some of the indicators light up or flicker.
• Clock does not keep time properly.
Fuse
CAUTION
!
Before replacing a blown monitor fuse, test the
primary interlock switch, secondary interlock switch,
monitor switch, and power relay contacts for proper
operation. If the monitor fuse is blown by a failed
switch operation, all switches and printed circuit board
must be replaced.
Problem:
• Fuse blows immediately after oven door is opened or
closed.
• Improper operation of primary, secondary and/or
monitor switches
• Fuse blows when oven door is closed and START pad
is pressed.
• Malfunction of the high voltage transformer, high
voltage capacitor including the diode, magnetron,
blower motor or circuit board.
Oven Thermostat
1. Disconnect power to oven and remove control panel,
(see "Control Panel" section).
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" section).
3. Remove outer case, (see "Outer Case" section).
4. Remove screws securing air duct to oven cavity.
5. Disconnect wires from oven thermostat.
6. Following is temperature setting for the thermostat.
Fahrenheit
Centigrade
Cycle
230
°
F
110
°
C
OFF
32
°
F
0
°
C
ON
Base Thermostat
1. Disconnect power to oven and remove control panel,
(see "Control Panel" section).
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" section).
3. Remove screws securing thermostat to base plate
and disconnect wires from thermostat.
4. Following is temperature setting for the thermostat.
Fahrenheit
Centigrade
Cycle
104
°
F
40
°
C
OFF
133
°
F
56
°
C
ON