Frigidaire CFMV152KW Servicing Manual page 31

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. Remove the control unit.
5. Follow the troubleshooting guide given below for repair.
STEPS
1
2
6. 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 215Ω ± 10%). If any abnormal
condition is detected, replace defective parts.
7. Reconnect all leads removed from components
during testing.
8. Re-install the control unit to the control panel
and re-install the control panel to the oven.
9. Reconnect the power supply cord. 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. Remove the hood intake duct R.
5. 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.
6. After that procedure, re-connect the power supply cord.
7. Follow the troubleshooting guide given below for repair.
STEPS
1
2
8. Disconnect the power supply cord.
9. Open the door and block it open.
10. To discharge high voltage capacitor, wait for 60 seconds.
11. Reconnect all leads removed from components during testing.
12. Re-install the hood intake duct R.
13. Re-install the outer case (cabinet).
14. Reconnect the power supply cord after the outer case is installed.
15. Run the oven and check all functions.
OCCURRENCE
Only pattern at "a" is broken.
Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d".
OCCURRENCE
The rated AC voltage is not present between
the normal open terminal of the relay RY2 and
the normal open terminal of the relay RY1.
The rated AC voltage is present at primary
side of low voltage transformer.
Section 3 Troubleshooting and Testing
Component Test
CAUSE OR CORRECTION
*Insert jumper wire J1 and solder.
c
CAUSE OR CORRECTION
Check supply voltage and oven power cord.
Low voltage transformer or secondary circuit defective.
Check and repair.
R Y3
b
(J1)
a
d
3-13