Sharp R-210D Service Manual

R-210D
11
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
to resistricted ventilation, cooling fan failure or a fault condition within the magnetron or HV circuit.
An open circuit temperature fuse (OVEN) indicates that the food in the oven cavity may catch fire, this
may be due to overheating produced by improper setting of the cooking time or failure of the control
panel.
H MOTOR WINDING TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two
terminals as described in the table below.
I FUSE M8A
CARRY OUT 3D CHECKS.
If the fuse M8A is blown when the door is opened, check the 1st latch switch, 2nd latch switch, monitor
switch and monitor resistor.
If the fuse M8A is blown by incorrect door switching, replace the defective switch(s) and the fuse M8A.
If the fuse M8A is blown, there is a shorts or grounds in electrical parts or wire harness.
Check them and replace the defective parts or repair the wire harness.
CARRY OUT
4R CHECKS.
CAUTION: Only replace fuse with the correct value replacement.
Table: Resistance of Motor
Motors Resistance
Fan motor Approximately 390 ohms
Turntable motor Approximately 12 kohms
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
J NOISE FILTER TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the noise filter. Using an ohmmeter, check between the
terminals as described in the following table.
If incorrect readings are obtained, replace the noise filter unit.
CARRY OUT 4R CHECKS.
MEASURING POINT INDICATION OF OHMMETER
Between N and L Open circuit
Between terminal N and WHITE Short circuit
Between terminal L and RED Short circuit
K HIGH VOLTAGE FUSE TEST
CARRY OUT 3D CHECKS.
If the high voltage fuse is blown, there could be a short in the high voltage rectifier or the magnetron.
Check them and replace the defective parts and the high voltage fuse.
CARRY OUT 4R CHECKS.
CAUTION: ONLY REPLACE HIGH VOLTAGE FUSE WITH THE CORRECT VALUE REPLACE-
MENT.
FUSE
M8A
N
L
LINE CROSS CAPACITOR
0.068µ/AC250V
NOISE SUPPRESSION COIL
LINE BYPASS
CAPACITOR
0.0022µ/AC250V
LINE BYPASS
CAPACITOR
0.0022µ/AC250V
NOISE FILTER
WHT RED

Sharp R-210D Specifications

General

Brand	Sharp
Model	R-210D
Category	Microwave Oven
Language	English