Electrolux MC2660E (EU) Service Manual page 22

PROCEDURE
LETTER
M
PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE
PRINTED WIRING BOARD (PWB) IS OPEN
SOI 05.06 FV
TEST PROCEDURES
To protect the electronic circuits, this model is provided with a fine foil pattern added to
the input circuit on the PWB, this foil pattern acts as a fuse. If the foil pattern is open,
follow the troubleshooting guide given below for repair.
Problem: POWER ON, indicator does not light up.
STEPS OCCURRENCE
1 The rated AC voltage is not
present between Pin No. 5-1 of the
3 pin connector (CNA)
2 The rated AC voltage is not
present at primary side of low
voltage transformer.
3 Pattern at "a" and "b" are broken.
4 Pattern at "c" and "d" are broken.
NOTE: *At the time of making these
repairs, make a visual
inspection of the varistor.
Check for burned damage. If
any abnormal condition is
detected, replace the
defective parts.
CARRY OUT 4D CHECKS
COMPONENT TEST
CAUSE OR CORRECTION
Check supply voltage and oven power
cord.
Low voltage transformer or secondary
circuit defective.
check and repair.
*Insert jumper wire J1 and solder.
(CARRY OUT 3D CHECKS BEFORE
REPAIR)
*Insert the coil code 5028 24 08-00/9
between "c" and "d (J1).
(CARRY OUT 3D CHECKS BEFORE
REPAIR)
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