Section 3 Troubleshooting and Testing
3-8
Component Test
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.
Ω
(Shorted)
BLU (2) AND BLK (1) = 26
Ω
Ω
RED (6) AND YLW (3) = 67
Ω
Ω
Ω
TOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as Logic Unit, 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. (See Warnings and Instructions on page 3-1)
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.
Procedure
Letter
K
L
BLU (2) AND YLW (3) = 0
BLU (2) AND RED (6) = 67
BLK (1) AND YLW (3) = 26
RED (6) AND BLK (1) = 42
5
3
2
1
4
6
