I've got a PSB SubSonic 5i that has blown it's fuse. Replaced the fuse, blew it instantly.
I looked at some other threads where people repaired their amps but their pictures seem to be for a different amp.
Here's a pic showing what looks like burned resistors. Is that what you guys see?
I looked at some other threads where people repaired their amps but their pictures seem to be for a different amp.
Here's a pic showing what looks like burned resistors. Is that what you guys see?
Unfortunate result. it appears as though a liquid looking like shampoo has been spilled. you can clearly see it in the top RHS of image. I'm also concerned you may have had capacitors leak, carefully turn off, The section of board should be disassembled. Put some gloves on, you can now clean the spillage with a toothbrush, .
Try and obtain a schematic diagram and with a multimeter check with unit OFF, resistances.
Report back here with that diagram and we will try and help.
Cheers / Chris
Try and obtain a schematic diagram and with a multimeter check with unit OFF, resistances.
Report back here with that diagram and we will try and help.
Cheers / Chris
That stuff isn't liquid, it's hard, and I believe it's glue. It's all over the board in different areas.
If you look closely at the picture, you'll see some very dark/burned areas near a couple of the resistors. I think that may be where the damage is.
If you look closely at the picture, you'll see some very dark/burned areas near a couple of the resistors. I think that may be where the damage is.
OK, its poor manufacturing to put glue inside a enclosure subject to currents and voltages, maybe do not buy that brand again. With power off !! 😱 check fuses have they disconnected current ?, if so you can tell a lot about a fault by the condition of the fuse. if stained with bits of metal all over the inside of the fuse - large amounts of current then possibly extensive damage, if a clean break then probably a semiconductor failure.
obtain a schematic, you will need it for fault finding
If fuses are intact, you have likely just overloaded the device, although poor initial design may contribute too, overload such as with incorrect speaker loads or incorrect connection, with power OFF visually check for burned out resistors, those that are stained carefully with a multimeter check their resistance. make decision to replace.
There are many precautions necessary for working on chassis or mains connected equipment, you need to observe them or seek assistance from a experienced repair facility - such as the manufacturer.🙂
Cheers / Chris
obtain a schematic, you will need it for fault finding
If fuses are intact, you have likely just overloaded the device, although poor initial design may contribute too, overload such as with incorrect speaker loads or incorrect connection, with power OFF visually check for burned out resistors, those that are stained carefully with a multimeter check their resistance. make decision to replace.
There are many precautions necessary for working on chassis or mains connected equipment, you need to observe them or seek assistance from a experienced repair facility - such as the manufacturer.🙂
Cheers / Chris
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