Good morning everyone, I have a mmats 1100.1 amplifier on my table, it had damaged mosfets irfb4710 and hip4080 which were replaced, I can no longer find damaged parts, however, I connect positive and ground (without connecting the remote control) and the led " default "stays on, there is no overconsumption, what can be activating this protection without the remote control cable?
Like anytime that a PS won't start, you need to look at the inputs of the driver IC to see which pins are shutting it down. Then follow back from that pin until you find what's shutting it down. If you need help, post the DC voltage on all pins of the IC.
he pwm / ic controller is sg3525, its leg voltages are:
1.-0.38 v
2.-5.19 v
3.-0.0 v
4.-0.49 v
5.-2.0 v
6.-3.8 v
7.-1.94 v
8.-0.05 v
9.-6.1 v
10.-0.03 v
11.-0.0 v
12.-0.0 v
13.-12.19 v
14.-0.0 v
15.-12.19 v
16.-5.19 v
1.-0.38 v
2.-5.19 v
3.-0.0 v
4.-0.49 v
5.-2.0 v
6.-3.8 v
7.-1.94 v
8.-0.05 v
9.-6.1 v
10.-0.03 v
11.-0.0 v
12.-0.0 v
13.-12.19 v
14.-0.0 v
15.-12.19 v
16.-5.19 v
you were right friend perry, q20 is defective, I replaced it and the amplifier turned on normally, thank you very much for your help friend
Not me. rdiaz.
Is this a common failure? The circuit board designations couldn't be read so I assume that this transistor has failed before.
Is this a common failure? The circuit board designations couldn't be read so I assume that this transistor has failed before.