National SR-MK18K - User Manual

Identifies key components and controls on the main unit and operation panel.

Details included accessories, carrying methods, and battery/paper precautions.

Diagrams of the power section and operation section printed circuit boards.

Details the cooking stages, LCD display, and LED indicators during operation.

Explains sensor temperature changes and timing for different cooking stages.

Information on Triac 1 and Triac 2 switching relay ratios during operation.

Guides for diagnosing malfunctions using tables and suspect component identification.

Safety precautions for handling sensitive electronic components and circuit boards.

Describes LCD indications for automatic self-diagnosis of abnormal modes.

Evaluation methods for tact switches (SW1-SW6) and relay (RL1) on the control board.

Evaluation methods for triacs (TR1, TR2) and buzzer (BZ) components.

Evaluation methods for LEDs (LED1-LED3) and crystal/ceramic oscillators (X1, X2).

Evaluation methods for ZNR, Transformer, and other miscellaneous components.

Procedure for resetting the unit, including jumper short-circuiting and time setting.

Procedure to check for proper pan contact with the heater by observing water bubbling.

Method to test the cooker's steaming capability and LCD timing accuracy.

Steps for detaching the outer body case and the hinge cover of the unit.

Procedure to remove the main body and the handle for access to internal components.

Instructions for removing the basis board base, wiring, and printed circuit boards.

Procedure for removing the thermal fuse, replacing it, and reassembling the unit.

Steps for removing the pan sensor, its wiring, and reassembling the unit.

List of primary replacement parts for MK10K and MK18K models.

List of standardized metal parts including screws and clips.

Details on packing materials such as outer cartons and fillers.

Identifies key components and controls on the main unit and operation panel.

Details included accessories, carrying methods, and battery/paper precautions.

Diagrams of the power section and operation section printed circuit boards.

Details the cooking stages, LCD display, and LED indicators during operation.

Explains sensor temperature changes and timing for different cooking stages.

Information on Triac 1 and Triac 2 switching relay ratios during operation.

Guides for diagnosing malfunctions using tables and suspect component identification.

Safety precautions for handling sensitive electronic components and circuit boards.

Describes LCD indications for automatic self-diagnosis of abnormal modes.

Evaluation methods for tact switches (SW1-SW6) and relay (RL1) on the control board.

Evaluation methods for triacs (TR1, TR2) and buzzer (BZ) components.

Evaluation methods for LEDs (LED1-LED3) and crystal/ceramic oscillators (X1, X2).

Evaluation methods for ZNR, Transformer, and other miscellaneous components.

Procedure for resetting the unit, including jumper short-circuiting and time setting.

Procedure to check for proper pan contact with the heater by observing water bubbling.

Method to test the cooker's steaming capability and LCD timing accuracy.

Steps for detaching the outer body case and the hinge cover of the unit.

Procedure to remove the main body and the handle for access to internal components.

Instructions for removing the basis board base, wiring, and printed circuit boards.

Procedure for removing the thermal fuse, replacing it, and reassembling the unit.

Steps for removing the pan sensor, its wiring, and reassembling the unit.

List of primary replacement parts for MK10K and MK18K models.

List of standardized metal parts including screws and clips.

Details on packing materials such as outer cartons and fillers.