SOI 12.06 FV 27/43 599 37 42-75
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
DC. voltage indicated .......... Defective relay.
DC. voltage not indicated .... Check diode which is connected to the relay coil. If
diode is good, control unit is defective.
RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENT
RY1 Approx.18.0 V D.C. Oven lamp / Turntable motor
RY2 Approx.18.0 V D.C. High voltage transformer
RY3 Approx. 24.0 V D.C. Grill (Top) heating element
RY4 Approx. 24.0 V D.C. Convection heating element
RY5 Approx. 24.0 V D.C. Touch control transformer
RY6 Approx. 24.0 V D.C. Fan motor
RY7 Approx. 24.0 V D.C. Convection motor
RY8 Approx. 24.0 V D.C. Damper motor
CARRY OUT 4R CHECKS
P
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.
CARRY OUT 3D CHECKS
STEPS OCCURRENCE CAUSE OR CORRECTION
1 The rated AC voltage is not
present between Pin No. 1 - 3 of
the 4 pin connector (E)
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 Only pattern at "a" is broken. *Insert jumper wire J1 and solder.
(CARRY OUT 3D CHECKS BEFORE
REPAIR)
4 Pattern at "a" and "b" 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 these repairs,
make a visual inspection of
the varistor for burning
damage and examine the
transformer with tester for the
presence of layer short circuit
(check primary coil resistance).
If any abnormal condition is
detected, replace the defective
parts.
CARRY OUT 4D CHECKS
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