Component Test - Electrolux MC2660E (EU) Service Manual

PROCEDURE
LETTER
E SWITCH TEST
F THERMAL CUT OUT TEST
G BLOWN FUSE F8A (F1)
SOI 05.06 FV
TEST PROCEDURES
CARRY OUT 3D CHECKS.
Isolate the switch to be tested and using an ohmmeter check between the
terminals as described in the following table.
Table: Terminal Connection of Switch
Plunger Operation COM to NO
Released Open circuit
Depressed Short circuit
If incorrect readings are obtained, replace the switch.
CARRY OUT 4R CHECKS.
CARRY OUT 3D CHECKS
Disconnect the leads from the terminals of the thermal cut-out. Then using an
ohmmeter, make a continuity test across the two terminals as described in the
below.
CARRY OUT 4R CHECKS
Parts Name
Thermal cut-out
125°C TC01
Thermal cut-out
125°C TC02
If incorrect readings are obtained, replace the thermal cut-out.
An open circuit thermal cut-out (MG) TC02 indicates that the magnetron has
overheated, this may be due to restricted ventilation, cooling fan failure.
An open circuit thermal cut-out (OVEN) TC01 indicates that the oven cavity
has overheated, this may be due to no load operation.
CARRY OUT 3D CHECKS
If the fuse F8A (F1) is blown when the door is opened, check the primary
latch switch, monitor switch and monitor resistor.
If the fuse F8A (F1) is blown by incorrect door switching replace the
defective switch(es) and the fuse F8A (F1).
CARRY OUT 4R CHECKS
CAUTION: Only replace fuse with the correct value replacement.

COMPONENT TEST

COM to NC
Short circuit
Open Circuit
Table: Thermal Cut-out Test
Temperature of Temperature of
"ON" condition "OFF" condition
(closed circuit). (open circuit).
(°C) (°C)
This is not Above 125°C
reset able type
This is not Above 125°C
reset able type
18/34
COM; Common terminal
NO; Normally open terminal
NC; Normally close terminal
Indication of
ohmmeter
(When room
temperature is
approx. 20°C.)
Closed circuit
Closed circuit
599 36 78-44