#Article debut challenge#Supor ball kettle rice cooker CFXB40HZ6-120 display screen jumping fault repair:
Supor ball kettle rice cooker (see Figure 1 for appearance),
Model CFXB40HZ6-120 (Fig. 2),
The fault phenomenon is that the countdown is a few minutes before the end of cooking, and the display screen jumps randomly (Figure 3-Figure 5).
Before that, the display screen is normal for dozens of minutes, mainly a few minutes of countdown time before the end of the scheduled cooking (for example, the regular cooking time is 45 minutes, and the failure will occur when the cooking is about 40 minutes, and the normal one will automatically jump to the keep warm state after 45 minutes of cooking) ,There is a phenomenon of the display screen jumping randomly,And it is past the scheduled time to cook rice,Still has been heating and cooking,The rice is scorched and can not automatically jump to the state of insulation,Check the sensor of the upper and lower cover and the motherboard 5V power supply,It's all good,Search on the Internet said that this phenomenon is that the clock crystal of the display screen is broken。
Remove the exhaust valve of the upper cover and remove the screws on both sides of the upper cover (Fig. 6-Fig. 7).
Pry open the panel along the gap between the edge of the upper cover, and the upper cover and the panel are snapped (Fig. 8).
Be careful not to pry it and remove the 15 screws of the panel (Fig. 9),
Revealing the display (Fig. 10),
Side view of the crystal oscillator and electrolytic capacitor (16V220UF, Figure 11) underneath the display,
The soldering iron disassembles the upper and lower rows of pins of the display (Figure 12),
Remove the display and see the crystal oscillator and electrolytic capacitor (Figure 13),
After checking that the leakage capacity of the electrolytic capacitor decreased, the crystal oscillator was damaged, and the crystal oscillator and electrolytic capacitor were replaced (Fig. 14).
The position of the crystal oscillator and electrolytic capacitor on the back of the board (Figure 15).
After replacing the crystal oscillator and electrolytic capacitor, the fault was successfully eliminated.
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