Konka color TV T21SK026 power failure repair example sharing - appliance repair - Huaqiang electronic network

MOS power IC full range
Filter 18.432M

I just repaired a Konka TV, and the model is shown in the images below. When I turned it on, there was no response at all—no indicator light, no sound, nothing. I started by removing the quick-release cover and checking the power supply. The voltage across the filter capacitor C910 was 310V, which looked normal. However, the +B voltage measured at the output was 0V, so I suspected a problem with the power supply section. I checked the TDA16846 power supply IC. The voltage on pin 2 of the test IC was around 13V, but pin 11 was 0V, which indicated an issue. After turning off the power and discharging C910, I tested the resistance of R902 and found it to be infinite. The resistor's color code suggested it was 2.2MΩ, so I replaced it with a similar one. After replacing the resistor, I powered the TV back on using a bulb tester. The bulb lit up, and the +B voltage measured 125V, which was within the normal range. Once the power was restored, the screen showed a raster, and when I connected the AV signal, the picture and sound worked perfectly. The entire repair took about ten minutes, and the customer was satisfied with the result. The service fee was reasonable, and the job went smoothly. It's always good to see a quick fix that works without needing more complex troubleshooting.

Tier 1 Solar Panel

Chinese Tier 1 brand Solar Panel (Longi, Jinko, Trina, Canadian, Ja etc.)

This type of product is mainly Tier 1 solar module product in China, include Longi solar panel. Jinko solar panel, Canadian Solar panel, ja solar panel etc.all of which are among the top 10 world-renowned brands. The original A grade product is mainly mono crystalline and half cut cell solar modules, with a power range of 400watts to a maximum of 700watts.quality warranty is 25 years.

A grade, this type of film is characterized by a neat and uniform appearance, printed electrode grid lines, no broken grid, no surface stains, no leakage, no aluminum package, no hidden cracks, no scratches, no black core, no reverse current, stable electrical performance, and high conversion efficiency
Using solar cell testing equipment to measure and screen, the conversion efficiency, filling factor, and appearance that meet certain standards are first level. Generally, the conversion efficiency, filling factor, and appearance of first level are better than those of level B
The level of solar panels can be divided into first level, second level, third level, and fourth level, and the first level components can be divided into first level+and first level - two levels. The second level is also the same, and the cost difference between different levels of solar panels is also very large.

Chinese tier 1 brand solar panel

TIER 1 brand include Longi, Jinko, Trina, JA, Canadian, znshine, etc.
quality warranty 25 years
grade original A grade (each solar panel can be checked on official website with barcode)
power range 400watt to max 700watt

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