Sharp Carousel R-350F Servis Kılavuzu - Sayfa 13

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PROCEDURE

LETTER

If incorrect readings are obtained, replace the motor.

CARRY OUT 4R CHECKS

BLOWN 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 fuse

F10A.

CARRY OUT 4R CHECKS.

CAUTION: ONLY REPLACE FUSE F10A WITH THE CORRECT VALUE REPLACEMENT

NOISE FILTER TEST

CARRY OUT 3D CHECKS.

Disconnect the leads from the terminals of the noise

filter. Using an ohmmeter, check between the termi-

nals 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.

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 high voltage fuse.

CARRY OUT 4R CHECKS.

CAUTION: ONLY REPLACE THE HIGH VOLTAGE FUSE WITH THE CORRECT VALUE RE-

TOUCH CONTROL PANEL ASSEMBLY TEST

The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,

unlike conventional microwave ovens, proper maintenance cannot be performed with only a

voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into two

units, Control Unit and Key Unit, and also the Control Unit is divided into two units, CPU Unit and

Power Unit, and troubleshooting by unit replacement is described according to the symptoms

indicated.

TEST PROCEDURES

Table: Resistance of Motor

Motors

Fan motor

Turntable motor

INDICATION OF

OHMMETER

Open circuit

Short circuit

PLACEMENT

COMPONENT TEST

Resistance

Approximately 405

Approximately 14.8 k

L (min)

600 H

R-350F

WHT

RED

20%

0.068 F

0.0022 F