R-1500

R-1501

R-1505

R-1506

SERVICING

1.Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed. CMOS LSI have extremely high impedance at its input and output terminals. For this reason, it is easily influenced by the surrounding high voltage power source, static electricity charge in clothes, etc. and sometimes it is not fully protected by the built-in protection circuit.

In order to protect CMOS LSI.

1)When storing and transporting, thoroughly wrap them in aluminium foil. Also wrap all PW boards containing them in aluminium foil.

2)When soldering, ground the technician as shown in the figure and use grounded soldering iron and work table.

approx. 1M ohm

2. Shapes of Electronic Components

Transistor

KRC243M

EC B

3.Servicing of Touch Control Panel

We describe the procedures to permit servicing of the touch control panel of the microwave oven and the precautions you must take when doing so. To perform the servicing, power to the touch control panel is available either from the power line of the oven itself or from an external power source.

(1)Servicing the touch control panel with power supply of the oven:

CAUTION:

THE HIGH VOLTAGE TRANSFORMER OF THE MICROWAVE OVEN IS STILL LIVE DURING SERVICING AND PRESENTS A HAZARD.

Therefore, before checking the performance of the touch control panel,

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 these leads remain isolated from other components and oven chassis by using insulation tape.

6)After that procedure, re-connect the power supply cord.

After checking the performance of the touch control panel,

1)Disconnect the power supply cord.

2)Open the door and block it open.

3)Re-connect the leads to the primary of the power

transformer.

4)Re-install the outer case (cabinet).

5)Re-connect the power supply cord after the outer case is installed.

6)Run the oven and check all functions.

A.On some models, the power supply cord between the touch control panel and the oven itself is so short that the two can’t be separated. For those models, check and repair all the controls (sensor-related ones included) of the touch control panel while keeping it connected to the oven.

B.On some models, the power supply cord between the touch control panel and the oven proper is long enough that they may be separated from each other. For those models, it is possible to check and repair the controls of the touch control panel while keeping it apart from the oven proper; in this case you must short both ends of the door sensing switch (on PWB) of the touch control panel with a jumper, which activates an operational state that is equivalent to the oven door being closed. As for the sensor-related controls of the touch control panel, checking them is possible if dummy resistor(s) with resistance equal to that of the controls are used.

(2)Servicing the touch control panel with power supply from an external power source:

Disconnect the touch control panel completely from the oven proper, and short both ends of the door sensing switch (on PWB) of the touch control panel, which activates an operational state that is equivalent to the oven door being closed. Connect an external power source to the power input terminal of the touch control panel, then it is possible to check and repair the controls of the touch control panel it is also possible to check the sensor-related controls of the touch control panel by using the dummy resistor(s).

4.Servicing Tools

Tools required to service the touch control panel assembly.

1)Soldering iron: 30W

(It is recommended to use a soldering iron with a grounding terminal.)

2)Oscilloscope: Single beam, frequency range: DC- 10MHz type or more advanced model.

3)Others: Hand tools

5.Other Precautions

1)Before turning on the power source of the control unit, remove the aluminium foil applied for preventing static electricity.

2)Connect the connectors of the key unit to the control unit being sure that the lead wires are not twisted.

3)After aluminium foil is removed, be careful that abnormal voltage due to static electricity etc. is not applied to the input or output terminals.

4)Attach connectors, electrolytic capacitors, etc. to PWB, making sure that all connections are tight.

5)Be sure to use specified components where high precision is required.

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Sharp R-1501 Shapes of Electronic Components, Servicing of Touch Control Panel, Servicing Tools, Other Precautions

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.