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Using DC Power Supply Identifying Shorted Components
September 21, 2016

Using DC Power Supply Identifying Shorted Components

Using DC Power Supply Identifying Shorted Components

Frequently at whatever point electronic hardware don’t capacity or work, we would instantly presume a broken switch mode control supply. Be that as it may, do you realize that faulty or shorted segments in the motherboard or principle board could bring about the power supply to quit working as well? 

Switch mode control supply (SMPS) are composed so effectively that at whatever point there is any short out happen in the fundamental board the power supply would stop itself and thoroughly quit working. On the off chance that you have no understanding about investigating switch mode control supply, you may surmise that the power supply have issue where in actuality the principle board is the genuine reason for no power issue.

 

Using DC Power Supply Identifying Shorted Components

Switch mode control supply have a present sense circuit (on the off chance that you take a gander at UC3842 PWM IC stick 3, it expressed I-sense which mean current sense) and if there is short out in the optional side (either in auxiliary diodes or fundamental board), the current drawn would be increment and this will lead the PWM IC to quit creating yield to the power fet and along these lines the power supply would close down. This happen in a split of seconds and you don’t have the opportunity to know whether there are yield voltages at the optional side.

SMPS power supply don't utilize the PWM

Some more seasoned outline of SMPS power supply along with Using DC Power Supply Identifying Shorted Components, don’t utilize the PWM IC, yet it do have the circuit to distinguish over momentum drawn and close itself down at whatever point it recognizes a shorted part in the auxiliary side. One great case was the power supply utilized as a part of printer. Printers for the most part have two sheets; one was the power supply while the other was fundamental board.

Zero voltages measured over all the supply

In the event of Using DC Power Supply Identifying Shorted Components, that there are zero voltages measured over all the supply (VCC) sticks then we can presume that the power supply have issue and you can put your entire focus in this power supply board. Imagine a scenario in which there are voltages measured over the connector. This implies the fundamental board is creating the no power issue most likely because of some shorted segments in the principle board.

Primary board is the fundamental driver

For your data, spot framework printers generally required two voltages to work. One is the 5 Volts (for rationale IC, eeprom and CPU) and the other is 30+ volts for the engines. The question now is how would we know whether the primary board is the fundamental driver that closing down the power supply? Extremely basic Using DC Power Supply Identifying Shorted Components, simply utilize your simple multimeter set to X 1 Ohm and measure between the supply stick (say 5 volts stick) and the fundamental load up ground and afterward switch the tests.

Segments shorted could bring about no energy

On the off chance that you have affirmed that the 5 volts line have issue then how would we discover the guilty party since there are such a large number of segments associated with this line? TTL IC’s, CPU, EEPROM, transistors, diodes and even little channel capacitors are altogether associated with the 5 volts line. Both of these segments shorted could bring about no energy to the printer.

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