Electrolux FGMO205KFA Service Manual page 29

Procedure
Letter
P FOIL PATTERN ON THE PRINTED WIRING BOARD TEST
To protect the electronic circuits, this model is provided with a fi ne foil pattern added to the primary
on the PWB, this foil pattern acts as a fuse.
Fuse check and repairs.
1. Disconnect the power supply cord.
2. Open the door and block it open.
3. Discharge high voltage capacitor. (See Warnings and Instructions on page 3-1)
4. Follow the troubleshooting guide given below for repair.
5. Make a visual inspection of varistor. Check for burn
damage and examine the transformer with a tester
for the presence of layer short-circuit (check the
primary coil resistance which is approximately 563Ω ±
10%). If any abnormal condition is detected, replace
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.
Follow the troubleshooting guide given below, if
indicator does not light up after above check and repairs are fi nished.
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. Ensure that these leads remain
isolated from other components and oven chassis by using insulation tape.
5. After that procedure, re-connect the power supply cord.
6. Follow the troubleshooting guide given below for repair.
7. Disconnect the power supply cord, and then remove outer case.
8. Open the door and block it open.
9. To discharge high voltage capacitor, wait for 60 seconds.
10. Reconnect all leads removed from components during testing.
11. Re-install the outer case (cabinet).
12. Reconnect the power supply cord after the outer case is installed.
13. Run the oven and check all functions.
Section 3 Troubleshooting and Testing
Component Test
3-11