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R-22AT
R-24AT
15
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
STEPS OCCURRENCE CAUSE OR CORRECTION
1 The rated AC voltage is not present at Check supply voltage and oven power cord.
POWER terminal of CPU connector (CN-A).
2 The rated AC voltage is present at primary Touch control transformer or secondary circuit defective.
side of touch control transformer. Check and repair.
3 Fuse on the PWB is open. Replace the fuse with new one.
(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 4R CHECKS.