Hello, I have this an axas his twin, which does nothing, no light comes on either, has this happened to anyone and been able to repair it? Thanks
I do not have this receiver, but if the box shows no sign of life, it seems to me that the first thing to be measured is whether the motherboard is receiving the 12vdc, and if so, whether the dc/dc circuits are providing the voltage. It is best to measure the coils such as the 4R7 etc. on dc measurement.
Thank you for your help, I am not an expert in measuring, I attach a photo to see if I have done it correctly
To measure DC voltages you need to place the black measuring probe on a ground spot, such as the metal of the tuner, or any other metal spot such as the network metal cover etc. With the red pen you measure the places that have the plus dc voltages. In this case the coils because they are output voltages of a dc/dc converter. This voltage is usually lower than the 12vdc input.
Seems to me to high, or it must be step up dc circuit, but seems to me illogical, or it must be 1.5vdc. Anyway, not sure if it has set to DCV 20, but it should be. Furthermore, it is a bit difficult for me to estimate where voltages should be present, but see the notes on the picture for more strategic measuring locations.
So based on your measurements you have the 12vDc, but the board looks like it is turned off. I don't see a mechanical On/Off switch, so it seems to me that it is turned on via that push button. Q:switch, just pressing it? A: Yes, and check via the ohms or diode measurement whether it connects when you press it. do it without the psu connected.
Is this how I have to do it? attached photos. If so these are the results ohmio : press buton : 0,03 Diode: press buton : 0,03
Okay, that seems to be fine, so there's some reason why it's not working. Then the next step is measuring inductors (L parts), see if they pass, measure them as if they were fuses, so not interrupted.
I just measured the L17 and it gave me another value, 232 more or less, and in the end with another measurement, it gave me 0.12 again, now the decoder works, could it be the L17 that is bad?
Q: could it be the L17 that is bad... A: That is certainly possible, it is best to replace it, the value of the inductor is a bit of an estimate, but usually a 0.33UH value is used on the plus side, and 0.56UH if it is the minus side. But on average it doesn't matter that much, as long as the inductor can handle the amperage consumption of that circuit, it's fine. Or resoldering, maybe it will help. Or else, see if this error occurs again later, it is quite possible that it will continue to work.
After almost two days, it's still working, so I'll listen to your last advice, leave it as it is and if the error returns, I'll change the part. Thanks a million
