Midea EM048K6DMP Service Manual page 17

Test Procedures
Procedure
Letter
K
HOOD FAN MOTOR TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. If the motor does not turn, touch the FAN button once and check voltage between pins "1" and
"2" (Black and Blue wires) of the 6 pin connector. If 120 Volts appear and the hood capacitor
is good, replace the hood fan assembly. If 120 Volts does not appear, check the motor circuit.
The resistance values of motor terminals are as follows:
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
WHT (1) AND YLW (4) = 0Ω (Shorted)
BLU (2) AND YLW (4) = 34Ω
WHT (1) AND BLK (2) = 34Ω
RED (5) AND WHT(1) = 77Ω
RED (5) AND BLU (2) = 43Ω
YLW (4) AND RED (5) = 77Ω
L
TOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc.
Therefore, unlike conventional microwave ovens, proper maintenance cannot be performed with only
a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into
two units, Control Unit and Key Unit, and troubleshooting by unit replacement is described
according to the symptoms indicated.
Before testing,
1. Disconnect power supply cord, and remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Remove two (2) screws holding the hood intake duct R to the oven cavity top plate and the
base
plate R. And remove the hood intake duct R.
5. Disconnect the leads to the primary of the power transformer.
6. Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
Continued on next page.
Component Test
YW
Cap.
Main
10µF
CON
SUB
RD
15
T/P
WH
6-pin Connector
Of Hood Fan Motor
RED
5
120V
60Hz
BL (Hi)
3
ORG BLU WHT
OR (Low)
YLW
4
2 1