E: Switch Test; F: Temperature Fuse Test; G: Motor Winding Test; H: Fuse F10A - Sharp R-380LS Service Manual

[5] E: SWITCH TEST

CARRY OUT 3D CHECKS.
Isolate the switch to be tested and using an ohmmeter check between the terminals as described in the following table.
Plunger Operation Common terminal to Normally open terminal
Released
Depressed
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.

[6] F: TEMPERATURE FUSE TEST

CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the temperature fuse. Then using an ohmmeter, make a continuity test across the two terminals as
described in the below.
Parts Name
Temperature fuse 150°C
If incorrect readings are obtained, replace the temperature fuse.
An open circuit temperature fuse (OVEN) indicates that the foods in the oven may catch fire, this maybe due to over heating produced by improper
setting of the cooking time or failure of the control panel.
CARRY OUT 4R CHECKS.

[7] G: 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.
Motors
RMOTEA405WRZZ
Resistance Approximately 388Ω
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.

[8] H: FUSE F10A

CARRY OUT 3D CHECKS.
1. If the fuse F10A is blown, there could be shorts or ground in electrical parts or wire harness.Check them and replace the defective parts or repair
the wire harness.
2. If the fuse F10A is blown when the door is opened, check the 1st. latch switch, 2nd. interlock relay and monitor switch.
If the fuse F10A is blown by incorrect door switching replace the defective switch(s) and the fuseF10A.
CARRY OUT 4R CHECKS.
CAUTION: ONLY REPLACE FUSE F10A WITH THE CORRECT VALUE REPLACEMENT.

[9] I: 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.
MEASURING POINT
Between N and L
Between terminal N and WHITE
Between terminal L and RED
If incorrect readings are obtained, replace the noise filter unit.
CARRY OUT 4R CHECKS.
Table: Terminal Connection of Switch
Open circuit
Short circuit
Table: Temperature Fuse Test
Temperature of "ON" condition
(closed circuit).
This is not resetable type.
Table: Resistance of Motor
Fan motor
RMOTEA390WRE0
Approximately 252Ω
INDICATION OF OHMMETER
Open circuit
Short circuit
Short circuit
Common terminal to Normally close terminal
Short circuit
Open circuit.
Temperature of "OFF" condition
(open circuit).
Above 150°C
RMOTDA253WRZZ RMOTDA265WRZZ
Approximately 14.5kΩ Approximately 14.7kΩ
8 – 3
Indication of ohmmeter (When room
temperature is approx. 20°C.)
Closed circuit
Turntable motor
RMOTDA173WRE0
Approximately 12.2kΩ
N
NOISE SUPPRESSION COIL
LINE CROSS CAPACITOR
0.068μ/AC250V
LINE BYPASS CAPACITOR
LINE BYPASS CAPACITOR
0.0022μ/AC250V
0.0022μ/AC250V
WHT
R380L(W)
L
RED