Panasonic NE-2157CR Replacement of power supply circuit board, Removal of Positive Lock connector

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NE-1257R/NE-1257CR / NE-1757R/NE-1757CR / NE-2157R/NE-2157CR / NE-1258

Removal of Positive Lock connector

The positive lock connector is a specially designed loose free connector and you will find this connector in many lead wire connections. To remove this connector, pull the lead wire by pressing an extruded lever in the center of receptacle terminal as shown.

18.2.Replacement of power supply circuit board

NOTE: Be sure to ground any static electric charge built up on your body, before handling the power supply P. C. B. and D. P. C..

1.Disconnect all lead wires from power supply circuit board.

2.Remove the power supply P. C. B. together with its mounting bracket by first removing the 2 bracket holding screws.

3.The power supply P. C. B. can be separated from mounting bracket by removing the 2 L. V. T. holding screws and unfastening the plastic clips.

18.3.Replacement of digital programmer circuit board

1.Remove grounding screw for membrane switch and D. P. C. ground.

2.Remove 3 screws holding control panel assembly to detach it from main unit then remove connectors.

3.Remove 2 screws holding the D. P. C. board and while pushing back on 2 plastic holding clips, remove the board.

NOTE: Please use care in handling the power supply P. C.

B. and D. P. C. board to avoid damage.

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Contents Commercial Microwave Oven Contents Page Outline Diagram Operation Procedure Page Page Page Page Wiring Requirements Wiring Requirements and Power Source Voltage SelectionSchematic Diagram NE-1257R, NE-1258R Schematic Diagram NE-1257CR Schematic Diagram NE-1757R Schematic Diagram NE-1757CR Schematic Diagram NE-2157R Schematic Diagram NE-2157CR Wiring Diagram NE-1257R, NE-1258R Wiring Diagram NE-1257CR Wiring Diagram NE-1757R Wiring Diagram NE-1757CR Wiring Diagram NE-2157R Wiring Diagram NE-2157CR Description of Operating Sequence Variable power cooking controlCheck the grounding Confirm after repair Replacement of magnetrons Upper and Lower Disassembly and Parts Replacement ProcedureRemoval of Positive Lock connector Replacement of power supply circuit boardReplacement of upper antenna Replacement of floor shelf and lower antennaReplacement of temperature sensor Thermal protector Disassembly of door assembly Component Test Procedure Temp sensor Thermal protector Measurement of microwave output Measurements and AdjustmentsEquipment Procedure for Measuring Microwave Energy LeakagePage Troubleshooting Guide Exploded View and Parts List High Voltage Label Parts ListDoor Hook a Spacer a Door Assembly Escutcheon Base Assembly Packing and Accessories Wiring Material 30 REF. no Noise Filter U 29 REF. no L. V. Transformer U31 REF. NO. E2 P. C. Board U Digital Programmer Circuit Schematic DiagramPage Parts List

NE-1257CR, NE-1757CR, NE-2157CR specifications

The Panasonic NE-2157CR, NE-1257CR, and NE-1757CR are three professional commercial microwaves designed for robust food service operations. These models are widely appreciated for their versatility, efficiency, and user-friendliness, making them ideal for restaurants, cafes, and food trucks.

The NE-2157CR stands out with its powerful 1500 watts of cooking power, which ensures quick and uniform heating of various food items. It features a large 0.9 cubic feet internal capacity, allowing users to accommodate larger dishes. One of the key highlights of this model is its programmable memory with up to 20 customizable settings, which enables users to recall frequently used cooking times and power levels easily. The stainless steel exterior and interior ensure durability and ease of cleaning, while the touch control panel provides a simple interface for quick operation.

Next in the line is the Panasonic NE-1257CR, which offers a slightly lower power output at 1200 watts, making it a more compact option while still delivering impressive cooking results. With a capacity of 0.8 cubic feet, it is an excellent choice for smaller kitchens that require efficiency without sacrificing quality. Its easy-to-use interface allows for basic cooking functions, while the stainless steel construction guarantees longevity in busy environments.

Finally, the NE-1757CR is a middle ground between the two, featuring 1700 watts of cooking power and an internal capacity of 0.6 cubic feet. This model combines performance with a smaller footprint, making it a versatile choice for various commercial settings. Like its counterparts, the NE-1757CR includes programmable presets and a user-friendly control panel, offering consistent results with minimal effort.

All three models utilize Panasonic's advanced inverter technology, which provides consistent heat and eliminates cold spots. This technology allows for more precise temperature control and helps preserve the texture and moisture of food during cooking.

In summary, the Panasonic NE-2157CR, NE-1257CR, and NE-1757CR are all excellent options for commercial kitchens looking for reliable, efficient microwaves. With their robust construction, user-friendly controls, and advanced cooking technologies, these models cater to a wide range of food preparation needs, enhancing productivity in any food service operation.
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