Sharp SMD2499FS Service Manual

21
SMD2499FS
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two
terminals as described in the table below.
Table: Resistance of Motor
N MOTOR WINDING TEST
Motors Resistance
Antenna motor Approximately 3.6 – 4.0 kΩ
Fan motor Approximately 12 - 16 Ω
MG fan motor Approximately 15 - 19 Ω
Rear Convection motor Approximately 45 - 55 Ω
Top conv motor (DC) Cannot check
Intake damper motor Approximately 3.6 – 4.0 kΩ
Exhaust damper motor Approximately 3.6 – 4.0 kΩ
LIVE TEST FOR MOTOR WINDING
CAUTION: The following procedure requires the oven to be connected to the supply and should only be
used if the relevant "cold" checks for the motor under test are inconclusive.
(without damper motor )
1. Unplug
2. Disconnect the leads from the primary of the high voltage transformer. Make sure that the leads remain
isolated from other oven components and chassis (Use insulation tape if necessary.)
3. Connect the voltmeter, set to 220V AC, across the motor terminals. (Refer to the relevant motor test
procedure or pictorial diagram for the correct terminal numbers.)
4. Arrange the meter in a position where it can be read during the test.
(Do not touch the meter, meter leads or oven circuitry while the oven is active.)
5. Close the oven door.
6. Plug
7. Set the power level to 0% and set the relevant timer for about three (3) minutes.
8. Note the reading on the meter and carefully observe the motor under test to see if it is turning.
9. Remove the test meter leads.
10. Reconnect the leads to the primary of the high voltage transformer.
(damper motor )
1. Unplug
2. Disconnect the leads from the primary of the high voltage transformer. Make sure that the leads remain
isolated from other oven components and chassis (Use insulation tape if necessary.)
3. Connect the voltmeter, set to 220V AC, across the motor terminals. (Refer to the relevant motor test
procedure or pictorial diagram for the correct terminal numbers.)
4. Arrange the meter in a position where it can be read during the test.
(Do not touch the meter, meter leads or oven circuitry while the oven is active.)
5. Close the oven door.
6. Plug
7. Note the reading on the meter and carefully observe the motor under test to see if it is turning.
8. Remove the test meter leads.
9. Reconnect the leads to the primary of the high voltage transformer.
If a reading of the line voltage was obtained (step 7) but the motor was not turning then it is faulty and should
be replaced. If the meter indicated that the no supply was present then the winding to the motor should be
checked for continuity or other circuit checks should be made, i.e. relays, switches.

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"