Sharp SMD2499FS Service Manual

19
SMD2499FS
J MONITOR SWITCH
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
Disconnect the oven from power supply.
Before performing this test, make sure that the primary interlock switch and the secondary interlock
relay are operating properly, according to the above Test Procedures. Disconnect the wire lead from
the monitor switch (NC) terminal. Check the monitor switch operation by using the ohmmeter as follows.
When the door is open, the meter should indicate a closed circuit. When the monitor switch actuator
is pushed by a screw driver through the lower latch hole on the front plate of the oven cavity with the
door opened (in this condition the plunger of the monitor switch is pushed in), the meter should indicate
an open circuit. If improper operation is indicated, the switch may be defective. After testing the monitor
switch, re-connect the wire lead to the monitor switch (NC) terminal and check for continuity of monitor
circuit.
Ohmmeter
Screw Driver
Primary
Interlock
Switch
Monitor
Switch
Disconnect the leads from the terminals of the thermal cut-out. Then using an ohmmeter, make a
continuity test across the two terminals as described in the below.
K THERMAL CUT OUT TEST
Parts Name
Temperature of "ON"
condition (closed circuit).
(˚C)
Temperature of "OFF"
condition (open circuit).
(˚C)
Indication of ohmmeter
(When room temperature
is approx. 20˚C.)
Top convection Thermal
cut-out 210˚C
(On the top convection duct)
This is not resettable type Above 210˚C Closed circuit
Rear convection Thermal
cut-out 145˚C
(On the rear convection duct)
This is not resettable type Above 145˚C Closed circuit
Grill Thermal cut-out 145˚C
(On the cavity top plate front)
This is not resettable type Above 145˚C Closed circuit
Oven Thermal cut-out 125˚C
(On the exhaust duct)
This is not resettable type Above 125˚C Closed circuit
MG Thermal cut-out 125˚C
(On the magnetron)
This is not resettable type Above 125˚C Closed circuit
Table: Thermal Cut-out Test
If incorrect readings are obtained, replace the thermal cut-out.
An open circuit thermal cut-out (MG) indicates that the magnetron has overheated, this may be due
to redistricted ventilation, cooling fan failure.
An open circuit thermal cut-out (Grill ) indicates that the oven cavity has overheated, this may be due
to oven thermistor failure.
An open circuit thermal cut-out (Top convection) indicates that the top convection duct has overheated,
this may be due to top convection motor failure or top convection thermistor.
An open circuit thermal cut-out (Rear convection) indicates that the rear convection duct has overheated,
this may be due to rear convection motor failure or oven thermistor.
An open circuit thermal cut-out (Oven) indicates that the oven cavity has overheated, this may be due
to ignition in the cooking chamber.

Sharp SMD2499FS Specifications

General

Style	drawer
Color	stainless steel
Total Capacity	1.4 cu. ft.
Convection	yes
Power Levels	11
Sensor Cooking	yes
Quick Start	yes
Timer	yes
Wi-Fi	yes
Remote Control	yes
Max Power Consumption	900 watts
Microwave Power	900 watts
Voltage	115 volts
Current	15

Weight and Dimensions

Depth	20-7/8"; 27"; 20 7/8 inch; 23-1/2"; 16-7/16"
Height	19 1/2 inch; 19-3/4"; 8-3/4"; 19-1/2"; 24-1/2"; 19-3/8"
Width	23-5/8"; 27-1/2"; 22-3/8"; 23 5/8 inch; 23-7/8"; 16-15/16"