As shown in the figure, the repairer has the following functions: it can judge the quality of the diode and the triode online; test the logic level or high-resistance state of the TTL; output the TV horizontal bar signal of 37MHz, 74MHz, 148MHz; output 465KHz, 930KHz, 1395KHz amplitude modulation signal.
In this circuit, 555 and R5, R6 and C8 form an astable multivibrator, and the outputs are respectively added to VT1, VT2 and the like as test signals. When the output is high, VT2 is turned off and VT3 is turned on; when low, VT2 is turned on and VT3 is turned off. Test diodes, triodes, from the LED1, LED2 lighting, you can judge the quality of the tube.
Fin Evaporator
Wire tube evaporators are widely used in refrigeration product, such as refrigerators, freezers . wire and tube evaporators need to be well ventilated when installed externally to ensure better cooling efficiency. The smooth flow of refrigerant helps to reduce the load on the compressor, saving energy and extending its service life. The structure is welded with steel wire using powder painting.Evaporator for wire tube are used in commercial freezer and visi-cooler too . We may supply wire tube evaporators according to customers' drawings or samples.
Fin Evaporator,Fridge Evaporator,Freezer Evaporator,Cooler Evaporator
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