How to identify color TV sets

Household appliances 1. The chromaticity knob is rotated to the minimum, the brightness and contrast are adjusted, the image is clear and soft, and the layers are distinct.

2. The chromaticity knob is adjusted to be large, and the color chaos flow phenomenon should not occur during the transition from black and white to color image.

3. After recalling the most sensible image, continue to rotate the frequency fine-tuning button, the image will become rough and distorted, close the frequency self-tuning switch, and the image should be restored immediately.

4. Observe whether the colors are naturally coordinated.

5. In addition to environmental disturbances, wavy, moire and strips on the screen are abnormal.

6. The volume is adjusted appropriately, and the sound is not distorted.

7. Adjust the measurement, the contrast knob should have a significant effect.

8. Push the preselector in sequence, and the screen will only flash slightly.

9. Turn off the power switch and leave no light or light on the screen.

How to identify the pros and cons of the refrigerator

When you identify it, look at the shape first, pay attention to the color of the shape, whether the paint film is peeling off and uneven. Connect the power supply and adjust the temperature. It should be adjusted to the second gear. Let the automatic controller stop, self-open several times, check whether the temperature control device is reliable and effective, then check whether the compressor is running normally and the noise level. Then turn the adjustment knob to the "non-stop" position for half an hour. The frost water can appear in the rear evaporator, so check whether the four walls of the evaporator are even and the heat dissipation is the same. Finally, check whether the door is tight and flexible.

How to identify the pros and cons of rice cookers

First put the inner sputum (or inner liner) into the outer casing and turn it left and right several times to check whether the inner raft and the heating plate at the bottom of the outer casing are in agreement. The use efficiency of the anastomosis is high. After connecting the power supply, touch the case with your fingers. There should be no numb feeling (leakage). After pressing the rice cooker switch for five minutes, the temperature at the bottom of the inner crucible is about 103 degrees. At this time, the temperature limiter contact should be automatically disconnected, and the rice cooking switch pops up and is transferred to a 60 degree Celsius holding state.

Quick identification of refrigerator thermostats for household appliances

1. First turn the temperature control switch to the "strong cold" position (must be after five minutes), at which point the compressor starts working.

2. Wait for 5-7 minutes, turn the switch to the “weak cold” position, the compressor should stop working, and the switch will have a “click” sound.

3. Wait another five minutes, turn the switch to the original "strong cold" file, the compressor should work, at this time. This thermostat can be considered normal.

How to identify automatic washing machine

1. Find out whether the control program of the washing machine is mechanical cam type or computer type.

2. Test the machine and observe that it enters, washes, drains, and dries in accordance with the time specified in the manual.

3. When the pointer is turned to the “dry” program, open the upper cover and the washing and drying cylinder should stop rotating for 10 seconds.

How to identify the pros and cons of electric fans

1. Look at the style.

2, look at the appearance: in addition to the appearance of the appearance, but also look at the paint and chrome is smooth, straight, no wrinkles, etc., the blade should be stable 3. Test performance: see if the open button is good, test the shaking head and the timer is not The control is accurate, the wind has no difference, the blade is stable, no sound, no leakage, and the temperature rises normally.

Quartz electronic watch identification

After looking good, pull the crown out to the position of the needle. The second hand should stop beating immediately. The tip of the needle just points to the point scale. When the needle is turned in the forward and reverse directions, the second hand should stop. After pushing back the watch for one second, the second hand should resume beating immediately. When walking, the second hand should be exactly one frame per beat, and the second hand does not touch the glass surface.

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