Electrolux EI30SM55JB, Техническое и сервисное руководство, Страница: 34 / 62

Troubleshooting and Testing
3-12
Procedure
Letter
O
Component Test
PROCEDURES TO BE TAKEN WHEN THE FUSE 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 check and repairs.
a) Disconnect the power supply cord.
b) Remove the covers.
c) Open the door and block it open.
d) Discharge high voltage capacitor. (See Warnings and Instructions on page 3-1)
e) If the Fuse is blown, replace power unit.
f) Make a visual inspection of the varistor. Check for burned damage. If the varistor has been
burned, replace the power unit.
g) Examine the touch control transformer with a tester for the presence of layer short-circuit
(check the primary coil resistance which is approximately 110W±10%). If any abnormal
condition is detected, replace the touch control transformer.
h) Reconnect all leads removed from components during testing.
i) Re-install the covers.
j) Reconnect the power supply cord after the covers are installed.
k) 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.
a) Disconnect the power supply cord.
b) Remove the covers.
c) Open the door and block it open.
d) Discharge high voltage capacitor. (See Warnings and Instructions on page 3-1)
e) Disconnect the leads to the primary of the power transformer.
f) Ensure that these leads remain isolated from other components and oven chassis by using
insulation
tape.
g) After that procedure, re-connect the power supply cord.
h) Follow the troubleshooting guide given below for repair.
i) Disconnect the power supply cord, and then remove the covers.
j) Open the door and block it open.
k) Discharge high voltage capacitor. (See Warnings and Instructions on page 3-1)
l) Reconnect all leads removed from components during testing.
m) Re-install the covers.
n) Reconnect the power supply cord after the covers are installed.
o) Run the oven and check all functions.