Sharp R-1870 Warning To Service Personnel, Dont Touch Danger High Voltage, Before Servicing

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WARNING TO SERVICE PERSONNEL

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WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of pro- ducing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock.

(Example)

High Voltage Capacitor, High Voltage Power Trans- former, Magnetron, High Voltage Rectifier Assem- bly, High Voltage Harness etc..

Read the Service Manual carefully and follow all instructions.

Don't Touch !

Danger High Voltage

Before Servicing

1.Disconnect the power supply cord Don't Touch ! , and then remove outer case.

2.Open the door and block it open.

3.Discharge high voltage capacitor.

WARNING:RISK OF ELECTRIC SHOCK. DISCHARGE THE HIGH-VOLTAGE CAPACITOR BEFORE SERVICING.

The high-voltage capacitor remains charged about 60 seconds after the oven has been switched off. Wait for 60 seconds and then short-circuit the connection of the high- voltage capacitor (that is the connecting lead of the high- voltage rectifier) against the chassis with the use of an insulated screwdriver.

Whenever troubleshooting is performed the power supply must be disconnected. It may, in some cases, be necessary to connect the power supply 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.

After repairing

1.Reconnect all leads removed from components during testing.

2.Reinstall the outer case (cabinet).

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

4.Run the oven and check all functions.

Microwave ovens should not be run empty. To test for the presence of microwave energy within a cavity, place a cup of cold water on the oven turntable, close the door and set the power to HIGH and set the microwave timer for two (2) minutes. When the two minutes has elapsed (timer at zero) carefully check that the water is now hot. If the water remains cold carry out Before Servicing procedure and re- examine the connections to the component being tested.

When all service work is completed and the oven is fully assembled, the microwave power output should be checked and a microwave leakage test should be carried out.

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Contents Service Headquarters Sharp Plaza, Mahwah, New Jersey SHARP ELECTRONICS CORPORATION sales service onlyTABLE OF CONTENTS SUPPLEMENTAL SERVICE MANUALBEFORE SERVICING Before Servicing WARNING TO SERVICE PERSONNELAfter repairing Dont Touch Danger High VoltageC. Leakage test MICROWAVE MEASUREMENT PROCEDUREB. Preparation for testing A. RequirementsIf provided, Vent Hood, Fan assembly, Cooling Fan Motor DANGERSHARP PLAZA, MAHWAH NEW JERSEY SERVICE MANUALGROUNDING INSTRUCTIONS SPECIFICATIONGENERAL INFORMATION DESCRIPTIONOVEN DIAGRAM OFF CONDITION POWER LEVEL P-0 TO P-90 COOKINGOPERATION DESCRIPTION OF OPERATING SEQUENCEFigure O-1. Oven Schematic - Off Condition Figure O-2. Oven Schematic - Microwave Cooking ConditionNOTE RY2 and RY3 will alternately close during cook cycle Figure O-4. Oven Schematic - Automatic Mix cooking ConditionR KEY UNIT TEST PROCEDURELETTER COMPONENT TESTR - 1 R Figure S-1. Pictorial DiagramHIGH VOLTAGE COMPONENTS 8 7 0 8 7R - 1 8 7 0 R - 1 8 7 Figure S-2. Touch Control Panel CircuitCABINET PARTS PARTS LISTNote The parts marked “∆” may cause undue microwave exposure ELECTRIC PARTSCODE OVEN PARTSMISCELLANEOUS DOOR PARTSHOW TO ORDER REPLACEMENT PARTS SCREWS,NUTS AND WASHERSOrder Parts from the authrized SHARP parts Distributor for your area OVEN AND CABINET PARTS R - 1 8 7 ACCESSORY PACK BOTTOM PAD PACKING AND ACCESSORIES6-2 INSTALLATION INSTRUCTION 6-7 COOK BOOK 6-3 OPERATION MANUAL 6-1 INSTALL MATERIAL ASSEMBLY 4-1 EXHAUST DAMPER ASSEMBLYR - 1 8 7 R - 1 8 7 R - 1 8 7 R - 1 8 7 R - 1 8 7 R - 1 8 7 01 SHARP CORP. 9M2.60E Printed in U.S.A COPYRIGHT 2001 BY SHARP CORPORATION ALL RIGHTS RESERVED
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R-1870 specifications

The Sharp R-1870, R-1871, R-1870BK, and R-1872 microwaves are advanced kitchen appliances designed for efficiency and convenience in meal preparation. These models are known for their innovative features and technologies that enhance everyday cooking.

One of the standout features of these microwaves is the integration of inverter technology. This groundbreaking technology allows for a consistent and even distribution of heat, ensuring that food is cooked thoroughly without overcooking or uneven hot spots. Unlike traditional microwave ovens, inverter technology provides a continuous power output, which is particularly beneficial for delicate foods like seafood, sauces, and sweets.

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User convenience is further enhanced by the user-friendly control panel, which includes pre-programmed settings for popular dishes. This simplifies the cooking process, allowing users to prepare meals with the push of a button. The models also feature a large, easy-to-read display that shows cooking settings and times, making operation straightforward.

In terms of design, the Sharp R-1870 models come in various finishes, including sleek black and stainless steel options, to complement modern kitchen aesthetics. The units are compact, making them suitable for countertops with limited space.

Safety features, such as child lock functionality and a time countdown, are also integral to the design of these microwaves. This adds peace of mind for families with young children or for those who multitask in the kitchen.

All in all, the Sharp R-1870, R-1871, R-1870BK, and R-1872 microwaves represent a fusion of technology and practicality, catering to the needs of today’s busy home cooks. With their inverter cooking capabilities, sensor technology, and spacious designs, these models are a smart addition to any kitchen, making meal preparation easier and more enjoyable.