Component Test - Electrolux MC1751E Service Manual

PROCEDURE
LETTER
E
SWITCH TEST
CARRY OUT 3D CHECKS.
Isolate the switch to be tested and using an ohmmeter check between the
terminals as described in the following table.
Plunger Operation
Released
Depressed
If incorrect readings are obtained, replace the switch.
CARRY OUT 4R CHECKS.
F THERMAL CUT OUT TEST
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
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.
G BLOWN FUSE F8A (F1)
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.
SOI 01.05 FV
TEST PROCEDURES

COMPONENT TEST

Table: Terminal Connection of Switch
COM to NO
Open circuit
Short circuit
Table: Thermal Cut-out Test
Parts Name Temperature of
"ON" condition
(closed circuit).
(°C)
Thermal cut-out This is not
125°C TC01 reset able type
Thermal cut-out This is not
125°C TC02 reset able type
17/33
COM to NC COM; Common terminal
Short circuit NO; Normally open terminal
Open Circuit NC; Normally close terminal
Temperature of
"OFF" condition
(open circuit).
(°C)
Above 125°C
Above 125°C
Indication of
ohmmeter
(When room
temperature is
approx. 20°C.)
Closed circuit
Closed circuit
599 36 78-06