| Electronics > Repair |
| Power Supply model SQ-White 600W |
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| GGMM:
Hello, The power supply of a friend’s PC has failed. it is a SQ-White 600W In fact there is no voltage at rest (led on motherboard or mouse light) when the switch is on. Pressing the CPU start button of course does not cause anything. Test done with another power supply, all reworks. Simple visual test and fuse, everything seems to be ok. So if you have the schematic it interests me. However, I would like to know how this tension of rest is made. I never had the opportunity to look at this type of material A small explanation is welcome. Otherwise, I would go into the classic test diagnostic. Thank you |
| GGMM:
re, I spent several hours inspecting/checking. Ultimately, it is not actually cost-effective to repair. Too much time spent on schematic research, diagnostics and transformers that can distort the measurement. And if you find a power transistor down, you have to order (often in sets of 5)....etc... So very informative, but in fact for less than 10 euros you have a used one. So, to the rebus... cdt |
| wraper:
Did you even check if there is 5V standby voltage? |
| GGMM:
Wraper, As stated in the first post, there is no standby voltage... The cables may be used one day... For example, there is a 700W for 15 € on hundreds of available on an ad site. (Same brand) So I’m not spending any more time on this cdt |
| wraper:
If the fuse is intact then fault must be very simple. Like bad PWM IC, maybe bad capacitor (on primary side). Forget about finding schematics, barely any PSU have them publicly available. If the fuse is blown you need to first determine if it blew due to bad standby or main PSU. |
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