Read Sharp R-360AM Service Manual online
R360AM - 6
TEST PROCEDURE
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 primary on the PWB, this foil pattern
acts as a fuse. If the foil pattern is open, follow the troubleshooting guide given below for repair.
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.
CARRY OUT 3D CHECKS.
STEPS
OCCURANCE
CAUSE OR CORRECTION
1
The rated AC voltage is not applied to
Check supply voltage and oven main unit.
POWER terminal of CPU connector (CN-A)
2
The rated voltage is applied to primary
Power transformer or secondary circuit defective.
side of power transformer.
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 RCILF2003YAZZ between "c" and "d".
(CARRY OUT 3D CHECKS BEFORE REPAIR)
CARRY OUT 4R CHECKS.
2
5
3
VRS1
Q3
BE
(J1)
POWER
O
R
D81
a
d
c
b
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.
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.
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