Sharp R-212B Service Manual page 49

PROCEDURE
LETTER
STEPS
1
2
3
4
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 pres-
ence of layer short-circuit (check pri-
mary coil resistance). If any abnormal
condition is detected, replace the de-
fective parts.
CARRY OUT 4R CHECKS.
TEST PROCEDURES
OCCURANCE
The rated AC voltage is not present at
POWER terminal of CPU connector (CN-A).
The rated AC voltage is present at primary
side of low voltage transformer.
Only pattern at "a" is broken.
Pattern at "a" and "b" are broken.
COMPONENT TEST
CAUSE OR CORRECTION
Check supply voltage and oven power cord.
Low voltage transformer or secondary circuit defective.
Check and repair.
*Insert jumper wire J1 and solder.
(CARRY OUT 3D CHECKS BEFORE REPAIR)
*Insert the coil RCILF2003YAZZ between "c" and "d".
(CARRY OUT 3D CHECKS BEFORE REPAIR)
b
13
R-212B
d
a
c
(J1)