TRICK REPAIR COMPUTER POWER SUPPLY

Power supply there are two types :
1. type AT
2. type ATX

 

Voltage Output Should Issued By Power supply:

Voltage: a. 3.3 VDC
             b. 5 VDC
             c. 12 VDC
            d. - 5 VDC
            e. - 12 VDC

A power supply unit (PSU) supplies direct current (DC) power to the other components in a computer. It converts general-purpose alternating current (AC) electric power from the mains (110 V to 120 V at 60 Hz [115 V nominal] in North America, parts of South America, Japan, and Taiwan; 220 V to 240 V at 50 Hz [230 V nominal] in most of the rest of the world) to low-voltage (for a desktop computer: 12 V, 5 V, 5VSB, 3V3, −5 V, and −12 V) DC power for the internal components of the computer. Some power supplies have a switch to select either 230 V or 115 V. Other models are able to accept any voltage and frequency between those limits and some models only operate from one of the two mains supply standards.
Most modern desktop computer power supplies conform to the ATX form factor. ATX power supplies are turned on and off by a signal from the motherboard. They also provide a signal to the motherboard to indicate when the DC power lines are correct so that the computer is able to boot up. While an ATX power supply is connected to the mains supply it provides a 5 V stand-by (5VSB) line so that the standby functions on the computer and certain peripherals are powered. The most recent ATX PSU standard is version 2.31 of mid-2008.
 
In Repair we must first understand the power voltage is 5 VDC gout. If the Power supply has damage that we must check are:
1. Check fuse on power supply
2. Check the tin solder on the circuit power supply
3. Voltage 5VDC power goutnya (If the power voltage of gout there is no then the power supply will not be live due to the power voltage is the voltage start to gout matherboard CPU)

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