Troubleshooting Guide - Sharp R-1505F Service Manual

Over the range microwave oven

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Cooking manual (40 pages)

Table of Contents

is channelled through the oven cavity to remove steam and

vapors given off from the heating foods. It is then exhausted

through the exhausting air vents at the oven cavity.

HOOD FAN MOTOR

The hood fan motor is a two-speed, single-phase, double

pole induction type, requiring a hood fan capacitor. It is

located outside the upper rear part of the oven cavity, is to

remove, from around the oven, hot air rising from the

conventional electric or gas range over which it is installed.

Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected.

When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many

of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter which

will be found in the "Test Procedure "section.

IMPORTANT: If the oven becomes inoperative because of a blown monitor fuse, check the monitor switch, relay (RY1)

secondary interlock relay (RY2), door sensing switch and primary interlock switch before replacing the

monitor fuse. If monitor fuse is replaced, the monitor switch must also be replaced. Use part FFS-BA016/

KiT as an assembly.

IMPORTANT: Whenever troubleshooting is performed with the power supply cord disconnected. It may in, some cases,

be necessary to connect the power supply cord after the outer case has been removed, in this event,

1. Disconnect the power supply cord, and then remove outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect the leads to the primary of the power transformer.

5. Ensure that the leads remain isolated from other components and oven chassis by using insulation tape.

6. After that procedure, reconnect the power supply cord.

When the testing is completed

1. Disconnect the power supply cord, and then remove outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Reconnect the leads to the primary of the power transformer.

5. Reinstall the outer case (cabinet).

6. Reconnect the power supply cord after the outer case is installed.

7. Run the oven and check all functions.

This air is then expelled either vertically or horizontally

through the customer supplied duct system, or discharged

back into the kitchen.

HOOD LAMP

The hood lamps are mounted at the hood lamp angle on the

base cover. The hood lamps can be turned off and on by

touching the LIGHT HI/ LO button. And also the brightness

can be varied to high or low by touching the LIGHT HI/ LO

button.