3.1.3. TROUBLESHOOTING ALGORITHMS FOR PC POWER SUPPLY

Prior to repairing the PC power supply unit, the following measures must be taken:

• Ensure the implementation of security measures (BP connected through an isolating transformer);
• Examine, if available, the concept of the BP, identify the main structural blocks, get acquainted with the design features;
• To determine the constructive placement of the main structural blocks of the BP.
• Make a plan (algorithm) for troubleshooting BP.

Figure 29 shows a general view of the troubleshooting algorithm in the PSU.

Figure 30-32 shows the search algorithms for the most common cases of power supply faults.

Algorithms for troubleshooting in PSU PC

Figure 29 - Troubleshooting algorithm in the PC power supply

Figure 30 - Troubleshooting algorithm in the PC power supply in cases where the output voltages do not differ from the nominal
Figure 31 - Fault finding algorithm in the PC power supply, in case of absence of some output voltages
Figure 32 - Algorithm of troubleshooting in the PC power supply, in the event of protection of the power supply and the absence of remote control of the PSU.