deJong
Member level 1
Hi Electronics Enthusiasts!,
I am having problems from my Power supply, it's an SMPS supply I bought from internet. I usually use this from other applications but this time from my amplifier. Here are the pics below.
The problem with this is that it cannot provide the output voltages of +15V and -15V anymore. I tried to troubleshoot it, opened everything and this is the picture. I checked the rectifiers, regulators and capacitors already, but the unit still does not give me an output. From the two modules, I suspect it's the PWM PCB that is causing this. It's using the UC2825ADW PWM which I also already replaced and unfortunately still having the same problem. I've checked the diodes (diode meter checking), and opto couplers and all are ok. This is my first time to see and debug this type of PWM SMPS power supply. Maybe you guys can enlighten my understanding of this and can help me repair this power supply. Thanks!
I am having problems from my Power supply, it's an SMPS supply I bought from internet. I usually use this from other applications but this time from my amplifier. Here are the pics below.
The problem with this is that it cannot provide the output voltages of +15V and -15V anymore. I tried to troubleshoot it, opened everything and this is the picture. I checked the rectifiers, regulators and capacitors already, but the unit still does not give me an output. From the two modules, I suspect it's the PWM PCB that is causing this. It's using the UC2825ADW PWM which I also already replaced and unfortunately still having the same problem. I've checked the diodes (diode meter checking), and opto couplers and all are ok. This is my first time to see and debug this type of PWM SMPS power supply. Maybe you guys can enlighten my understanding of this and can help me repair this power supply. Thanks!
