Sharp Carousel R-395N Manual de servicio - Página 12
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R395N(S)
[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.
Table: Resistance of Fan Motor
Motors
RMOTEA450WRZZ
Resistance
Approx. 384Ω
Motors
RMOTDA253WRZZ
Resistance
Approx. 14.5kΩ
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.
Table: Terminal Connection of Switch
Open circuit
Short circuit
Table: Temperature Fuse Test
Temperature of "ON" condition
(closed circuit).
This is not resetable type.
RMOTEA405WRZZ
RMOTEA390WRE0
Approx. 388Ω
Approx. 252Ω
Table: Resistance of Turntable Motor
RMOTDA265WRZZ
RMOTDA173WRE0 RMOTDA289WRZZ
Approx. 14.7kΩ
Approx. 12.2kΩ
Common terminal to Normally close terminal
Short circuit
Open circuit.
Temperature of "OFF" condition
(open circuit).
Above 150°C
Approx. 13.5kΩ
8 – 3
Indication of ohmmeter (When room
temperature is approx. 20°C.)
Closed circuit