24
E30SO75ESS
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
Y PROCEDURES TO BE TAKEN WHEN THE FUSE 1 ON THE PRINTED WIRING BOARD (PWB)
IS OPEN.
To protect the electronic circuits, this model is provided with a fuse added to the primary on the PWB.
1. Fuse 1 check and repairs.
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 Fuse 1 is blown, replace it.
5) Make a visual inspection of the varistor. Check for burned damage and examine the transformer with
a tester for the presence of layer short-circuit (check the primary coil resistance which is approximately
275Ω ± 10%). If any abnormal condition is detected, replace the defective parts.
6) Reconnect all leads removed from components during testing.
7) Re-install the outer case (cabinet).
8) Reconnect the power supply cord after the outer case is installed.
9) Run the oven and check all functions.
2. Follow the troubleshooting guide given below, if indicator does not light up after above check and repairs
are finished.
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) Disconnect the leads to the primary of the power transformer.
5) Ensure that these leads remain isolated from other components and oven chassis by using insulation
tape.
6) After that procedure, re-connect the power supply cord.
7) Follow the troubleshooting guide given below for repair.
STEPS OCCURRENCE CAUSE OR CORRECTION
1 The rated AC voltage is not present to power Check supply voltage and oven power cord.
terminal of CPU connecter (CN-D).
2 The rated AC voltage is present at primary Low voltage transformer or secondary circuit defective.
side of low voltage transformer. Check and repair.
8) Disconnect the power supply cord, and then remove outer case.
9) Open the door and block it open.
10) Discharge high voltage capacitor.
11) Reconnect all leads removed from components during testing.
12) Re-install the outer case (cabinet).
13) Reconnect the power supply cord after the outer case is installed.
14) Run the oven and check all functions.
arrows. And touch the number pad 5. And then touch the start pad.
(3) The oven is in Defrost cooking condition.
(4) The oven will operate as follows.
WEIGHT 1ST STAGE 2ND STAGE 3RD STAGE
Steaks/Chops LEVEL TIME LEVEL TIME LEVEL TIME
0.5lbs 70% 17sec. 60% 30sec. 30% 45sec.
(5) If improper operation is indicated, the control unit is probably defective and should be checked.
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