Sharp Carousel R-880F, Руководство по обслуживанию

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R-880F(S)
15
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 Motor
Motors Resistance
Fan motor Approximately 290
Ω
Turntable motor Approximately 15 k
Ω
Convection motor Approximately 293
Ω
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
H BLOWN FUSE 15A
J MOTOR WINDING TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of noise filter.
Using an ohmmeter, check between the terminals as
described in the following table.
MEASURING POINTS INDICATION OF OHMMETER
Between N and L Approx. 680 k
Ω
Between terminal N and WHITE Short circuit
Between terminal L and RED Short circuit
If incorrect readings are absorbed, replace the noise filter unit.
CARRY OUT 4R CHECKS.
I NOISE FILTER TEST
CARRY OUT 3D CHECKS.
If the fuse 15A is blown, there could be a short or ground 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 15A with the correct value replacement.
K TOP HEATERS AND BOTTOM HEATER TEST
CARRY OUT 3D CHECKS.
Before carrying out the following tests make sure the heater is cool completely.
1. Resistance of heater.
Disconnect the wire leads to the heater to be tested. Using ohmmeter with low resistance range.
Check the resistance across the terminals of the heater as described in the following table.
Table: Resistance of heater
Parts name Resistance
Top heaters Approximately 24
Ω
x 2 = 48
Ω
Bottom heater Approximately 72
Ω
2. Insulation resistance.
Disconnect the wire leads to the heater to be tested. Check the insulation resistance between the
heater terminal and cavity using a 500V - 100M
Ω
insulation tester. The insulation resistance should
be more than 10 M
Ω
in the cold start.
If the results of above test 1 and/or 2 are out of above specifications, the heater is probably faulty and
should be replaced.
CARRY OUT 4R CHECKS.
N WHT
RED
L