R-3S56
13
TEST PROCEDURES (CONT'D)
PROCEDURE
LETTER
COMPONENT TEST
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 4R CHECKS.
STEPS OCCURANCE CAUSE OR CORRECTION
1 The rated voltage is not applied to POWER
terminal of CPU connector (CN-A)
Check supply voltage and oven main unit.
2 The rated voltage is applied to primary side of
power transformer.
Power transformer or secondary circuit defective. Check
and repair.
3 Only pattern at "a" is broken. *Insert jumper wire J1 and solder.
4 Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d".
VRS1
CN-A
(J1)
RY2
POWER
5
D82
a
c
b
d
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