1. Introduction
Thank you for purchasing the TOSHIBA TMC16S4AST Microwave Oven. This appliance features advanced Origin Inverter Technology, a smart sensor, and a user-friendly LCD display, designed to provide efficient and convenient cooking. Please read this manual thoroughly before operating your new microwave oven to ensure safe and optimal performance. Keep this manual for future reference.

Image 1.1: The TOSHIBA TMC16S4AST Microwave Oven in Stainless Steel.
2. Important Safety Instructions
When using electrical appliances, basic safety precautions should be followed, including the following:
- Read all instructions before using the appliance.
- Do not attempt to operate this oven with the door open as this can result in harmful exposure to microwave energy.
- Do not place any object between the oven front face and the door or allow soil or cleaner residue to accumulate on sealing surfaces.
- Do not operate the oven if it is damaged. It is particularly important that the oven door closes properly and that there is no damage to the: (1) door (bent), (2) hinges and latches (broken or loosened), (3) door seals and sealing surfaces.
- The oven should not be adjusted or repaired by anyone except properly qualified service personnel.
- Ensure the appliance is properly grounded.
- Do not heat liquids or other foods in sealed containers since they are liable to explode.
- Always use oven mitts when handling hot containers from the microwave.
- Supervise children closely when the microwave is in use.
3. Setup and Installation
3.1 Unpacking
Carefully remove the microwave oven from its packaging. Remove all packing materials, including the protective film on the keypad. Inspect the oven for any damage. If any damage is found, do not operate the oven and contact customer service.
3.2 Placement
Place the microwave oven on a flat, stable surface that is strong enough to support its weight. Ensure there is adequate ventilation around the unit. Maintain the following minimum clearances:
- Top: 3 inches (7.6 cm)
- Sides: 3 inches (7.6 cm)
- Rear: 3 inches (7.6 cm)

Image 3.1: Recommended clearances for proper ventilation and installation.
3.3 Electrical Connection
Plug the microwave oven into a dedicated, properly grounded 120V AC, 60Hz electrical outlet. Do not use extension cords or adapters.
3.4 Turntable Assembly
Place the turntable ring inside the oven cavity. Position the glass turntable plate securely on top of the turntable ring, ensuring it sits properly on the center hub.
4. Operating Instructions
4.1 Control Panel Overview
The control panel features a bright LED digital display and an easy-to-read layout with buttons for various functions.
4.2 Setting the Clock
- Press the "Clock" button.
- Use the number pad to enter the current time (e.g., 12:30).
- Press the "Clock" button again to confirm.
4.3 Microwave Cooking
- Place food in a microwave-safe container on the glass turntable.
- Close the oven door.
- Enter the desired cooking time using the number pad.
- Press "Power Level" repeatedly to select the desired power level (10 levels available).
- Press "Start" to begin cooking.
4.4 Quick Start Buttons
For quick cooking, press the "1", "2", or "3" minute buttons to start cooking immediately at full power for the corresponding duration.
4.5 Smart Sensor Auto Menus
The Smart Sensor function automatically adjusts cooking time and power for optimal results. Available menus include:
- Pizza
- Potato
- Vegetables
- And more (refer to control panel for full list)
To use: Place food in the oven, select the desired auto menu, and press "Start". The sensor will detect moisture and humidity to determine cooking progress.
4.6 Auto Defrost & 1 lb. Defrost
Use these functions for efficient defrosting of various foods. The 1 lb. defrost is specifically designed for quick defrosting of one pound of food.
4.7 Soften/Melt Function
This feature is ideal for softening butter, melting chocolate, or other similar tasks, preventing overheating.
4.8 Memory Function
Save frequently used cooking settings for quick access. Consult the full user manual for detailed instructions on programming and recalling memory settings.
4.9 Eco Mode
Activate Eco Mode to reduce standby power consumption, contributing to energy savings.

Image 4.1: Eco Mode reduces standby power consumption by 50%.
4.10 Mute Button
Press the Mute button to silence the microwave's beeps and alerts for quiet operation.
4.11 Kitchen Timer
The microwave can also function as a standalone kitchen timer. Press the "Timer" button, enter the desired time, and press "Start".
5. Maintenance and Cleaning
5.1 Cleaning the Exterior
Wipe the exterior surface with a soft, damp cloth. For stainless steel, use a specialized stainless steel cleaner if necessary. Avoid abrasive cleaners or scouring pads.
5.2 Cleaning the Interior
Clean the interior cavity regularly. Wipe spills immediately with a damp cloth. For stubborn food residue, place a bowl of water with lemon slices inside and microwave for 2-3 minutes to create steam, then wipe clean. Ensure the door seals are clean and free of food particles.
5.3 Cleaning the Turntable
The glass turntable and turntable ring can be removed for cleaning. Wash them in warm, soapy water or in the dishwasher. Ensure they are completely dry before placing them back in the oven.
5.4 Odor Removal
To remove odors from the microwave, combine 1 cup of water with several lemon slices or 2 tablespoons of white vinegar in a microwave-safe bowl. Microwave on high for 5 minutes. Let it sit for 10-15 minutes before opening the door, then wipe the interior clean.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Oven will not start | Power cord not plugged in; Door not closed properly; Fuse blown or circuit breaker tripped. | Ensure plug is securely in outlet; Close door firmly; Check household fuse/circuit breaker. |
| Food not cooking evenly | Food not stirred or turned; Turntable not rotating; Incorrect power level/time. | Stir or turn food during cooking; Check turntable assembly; Adjust power level and cooking time. |
| Light bulb not working | Light bulb burned out. | Contact qualified service personnel for replacement. |
| Excessive steam from door | High moisture content in food. | This is normal for foods with high moisture. Ensure proper ventilation. |
If the problem persists after trying the solutions above, please contact Toshiba customer support.
7. Specifications
| Feature | Detail |
|---|---|
| Model | TMC16S4AST |
| Capacity | 1.6 Cu. Ft. |
| Power Output | 1200 Watts |
| Power Levels | 10 |
| Technology | Origin Inverter Technology |
| Control Type | Button, Touch Control |
| Display | LCD Digital Display |
| Special Features | Smart Sensor, Auto Defrost, Soften/Melt, Eco Mode, Mute Function, Kitchen Timer |
| External Dimensions (WxDxH) | 21.8 x 19.2 x 13 inches (approx.) |
| Internal Dimensions (WxDxH) | 15.5 x 17 x 10.2 inches (approx.) |

Image 7.1: Detailed dimensions of the microwave oven.
8. Warranty and Support
8.1 Warranty Information
Toshiba provides a limited warranty for this product. Please refer to the warranty card included with your purchase or visit the official Toshiba website for detailed warranty terms and conditions. Keep your purchase receipt as proof of purchase for warranty claims.
8.2 Customer Support
For technical assistance, troubleshooting, or service inquiries, please contact Toshiba customer support. You can find contact information on the Toshiba website or in the documentation provided with your appliance.
Online Support: Visit the Toshiba Kitchen Store on Amazon for product information and support resources.
Before contacting support, please have the following information ready:
- Model Number: TMC16S4AST
- Serial Number (located on the back or side of the unit)
- Date of Purchase
- A clear description of the issue