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TEST PROCEDURES (CONT'D)
PROCEDURE
LETTER
D
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
1
The rated voltage is not applied between Pin
No. 5 of the 3 pin connector (A) and the
common terminal of the relay RY2.
2
Only pattern at "a" is broken.
3
Pattern at "a" and "b" 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.
COMPONENT TEST
CAUSE OR CORRECTION
Check supply voltage and oven power cord.
*Insert jumper wire J1 and solder.
*Insert the coil RCILF2003YAZZ between "c" and "d".
RY2
1
R343M - 7
b
c
d
(J1)
a
CN-A
5
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