SOI 05.06 FV 22/34 599 36 78-44
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
M
PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE
PRINTED WIRING BOARD (PWB) IS OPEN
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 CAUSE OR CORRECTION
1 The rated AC voltage is not
present between Pin No. 5-1 of the
3 pin connector (CNA)
Check supply voltage and oven power
cord.
2 The rated AC voltage is not
present at primary side of low
voltage transformer.
Low voltage transformer or secondary
circuit defective.
check and repair.
3 Pattern at "a" and "b" are broken. *Insert jumper wire J1 and solder.
(CARRY OUT 3D CHECKS BEFORE
REPAIR)
4 Pattern at "c" and "d" are broken. *Insert the coil code 5028 24 08-00/9
between "c" and "d (J1).
(CARRY OUT 3D CHECKS BEFORE
REPAIR)
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
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