Sharp R-1500, R-1505, R-1501, R-1506 Procedure Letter Component Test, High Voltage Rectifier Test

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R-1500

R-1501

R-1505

R-1506

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO MEASURE THE FILAMENT AND HIGH VOLTAGE.)

CHIGH VOLTAGE RECTIFIER TEST

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.Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance across the terminals and observe, reverse the leads to the rectifier terminals and observe meter reading. If a short is indicated in both directions, or if an infinite resistance is read in both directions, the rectifier is probably defective and should be replaced.

5.Reconnect all leads removed from components during testing.

6.Reinstall the outer case (cabinet).

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

8.Run the oven and check all functions.

NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts.

DHIGH VOLTAGE CAPACITOR TEST

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.If the capacitor is open, no high voltage will be available to the magnetron. Disconnect input leads and check for short or open between the terminals using an ohmmeter.

Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate continuity for a short time and should indicate an open circuit once the capacitor is charged. If the above is not the case, check the capacitor with an ohmmeter to see if it is shorted between either of the terminals and case. If it is shorted, replace the capacitor.

5.Reconnect all leads removed from components during testing.

6.Reinstall the outer case (cabinet).

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

8.Run the oven and check all functions.

ECAVITY THERMAL CUT-OUT TEST

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.A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the temperature of the thermal cut-out reaches approximately 293˚F(145˚C).

An open thermal cut-out indicates overheating of the oven, exchange the oven thermal cut-out and check inside of oven cavity and for improper setting of cooking time or operation of control unit. Check for restricted air flow through the vent holes of the oven cavity, especially the cooling fan and air guide.

5.Reconnect all leads removed from components during testing.

6.Reinstall the outer case (cabinet).

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

8.Run the oven and check all functions.

MAGNETRON TEMPERATURE FUSE TEST

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.A continuity check across the temperature fuse terminals should indicate a closed circuit. If the temperature of the magnetron reaches approximately 302˚F(150˚C), the temperature fuse opens. An open temperature fuse indicates overheating of the magnetron. Check for restricted air flow to the magnetron, especially the cooling fan air guide.

5.Reconnect all leads removed from components during testing.

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Contents Table of Contents 1506Before Servicing When the testing is completed Dont Touch Before ServicingRequirements Microwave Measurement ProcedureLeakage test Sharp PLAZA, Mahwah Over the Range Microwave Oven1500/ R-1501/ R-1505/ R-1506 ForewordProduct Specification General InformationDescription Grounding InstructionsOven Diagram Level Control PanelLight HI/ LO FAN HI/ LO Stop Clear Start Minute Plus Power Level P-0 to P-90 Cooking OperationDescription of Operating Sequence OFF ConditionVentilation Methods HOT AIR Exhaust Vertical VentingAIR Flow Horizontal VentingFigure O-1. Oven Schematic-Off Condition Description and Function of Components Hood FAN Motor Troubleshooting GuideHood Lamp Test Procedure Problem Possible Case Defective PartsTest Procedures Procedure Letter Component Test Magnetron Assembly TestMicrowave Output Power Power Transformer TestProcedure Letter Component Test Magnetron Temperature Fuse TestHigh Voltage Rectifier Test High Voltage Capacitor TestPrimary Interlock Switch Test Secondary Interlock System Test Door Sensing SwitchMonitor Switch Test Secondary Interlock Relay RY2Procedure Component Test Letter Blown Monitor Fuse TestHood Thermal CUT-OUT Test Hood FAN Motor TestBefore testing Touch Control Panel Assembly TestWHT 3 KEY Unit Test Procedure Letter Component Test Relay Test Foil Pattern on the Printed Wiring Board TestDefrost Center Test 1ST Stage 2ND StageQKITPB035 Steps Occurrence Cause or CorrectionDescription of LSI Touch Control Panel AssemblyLSI OUT Oven lamp, fan motor and turntable motor driving signal Signal synchronized with commercial power source frequencyInternal clock oscillation frequency input setting OUT Key strobe signalKey strobe signal Hood lamp driving signalHood motor high / low driving signal Hood motor driving signalOther Precautions ServicingShapes of Electronic Components Servicing of Touch Control PanelComponent Replacement and Adjustment Procedure Hood Exhaust Louver RemovalPower Transformer Removal Re-installPictorial Diagram Outer Case RemovalMagnetron Removal High Voltage Rectifier and High Voltage Capacitor RemovalHood FAN Thermal CUT-OUT Removal Thermal CUT-OUT Cavity RemovalTemperature Fuse Magnetron Removal Cooling FAN Motor RemovalPositive Lock Connector NO-CASE Type Removal Control Panel ASSEMBLY, Control Unit and KEY Unit RemovalPositive lock connector Turntable Motor and Food Lamp Sockets RemovalKey unit location Control Unit and KEY Unit RemovalDoor Replacement After adjustment, check the followingDoor Assembly Removal Door Assembly RE-INSTALLDoor Disassembly ReplacementDoor Frame Assembly Choke CoverControl Unit High Voltage ComponentsFigure S-2. Power Unit Circuit Circuit UnitDIP Parts List Parts marked * are used in voltage more thanElectric Parts Cabinet PartsDoor Parts Oven PartsMiscellaneous HOW to Order Replacement Parts Packing and AccessoriesSCREWS,NUTS and Washers Model NumberOven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous Copyright 2001 by Sharp Corporation ALL Rights Reserved
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R-1506, R-1501, R-1505, R-1500 specifications

The Sharp R-1500, R-1505, R-1501, and R-1506 are part of Sharp's extensive line of microwave ovens, showcasing advanced cooking technologies and user-friendly features that cater to the modern kitchen. These models are designed to provide convenience and efficiency while delivering consistent cooking results.

One of the standout features across these models is the use of Sharp's innovative microwave technology, which ensures even heating and cooking. This is achieved through a combination of advanced microwave distribution systems that help to minimize cold spots common in traditional microwaves. As a result, users can enjoy perfectly cooked meals, whether it's reheating leftovers or preparing a fresh dish.

Each model comes equipped with a variety of cooking presets that simplify meal preparation. These presets are tailored for a range of foods, including popcorn, pizza, vegetables, and baked goods. With just the press of a button, users can automatically adjust the cooking time and power level, making the cooking process intuitive and hassle-free.

The R-1500 and R-1505 models, in particular, offer a sleek and modern design that can seamlessly blend into any kitchen décor. The front-facing control panel is easy to read and navigate, while the spacious interior can accommodate larger dishes, making these models ideal for family meals or entertaining guests.

In addition to their cooking capabilities, these microwaves prioritize energy efficiency and safety. With features like a child lock function and an eco-mode, users can have peace of mind knowing that their appliance is safe for the entire family and environmentally conscious.

The R-1501 model adds additional versatility by including a grill function, allowing users to achieve that perfect crispiness on meats and vegetables. This feature enhances the range of cooking options available, making it suitable for those who enjoy grilling but may not have the outdoor space or equipment.

Lastly, the R-1506 combines the benefits of microwave cooking with user-friendly features such as a digital display and programmable timers. This model is particularly well-suited for busy households, as it allows for quick meal prep without sacrificing quality.

In summary, the Sharp R-1500, R-1505, R-1501, and R-1506 microwave ovens represent a blend of advanced technology, safety features, and user-convenience. They cater to a broad spectrum of cooking needs, from basic reheating to more complex meal preparations, all while maintaining a focus on efficiency and style.
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