Mackie SR24.4
Does anyone have any experience with the Mackie SR24.4
A customer asked if I could repair one which he said had a power issue. So I was hoping for an easy power supply repair but on opening it I find this in channel 11. s651.photobucket.com/user/jbloggs2/library Sorry Mr Customer I don't think it's going to be repairable. |
Mackie SR24.4
John Smith wrote:
Does anyone have any experience with the Mackie SR24.4 A customer asked if I could repair one which he said had a power issue. So I was hoping for an easy power supply repair but on opening it I find this in channel 11. s651.photobucket.com/user/jbloggs2/library Sorry Mr Customer I don't think it's going to be repairable. ** It might take a bit of time and work, but that looks repairable to me. Mackie don't bother to de-couple each channel with fusible resistors in case of a short. Op-amps can be the cause and then PSU delivers up to 20 watts of heat into one - starting a small fire. I would start by removing all the burnt parts and seeing if the PSU fault is cleared. .... Phil |
Mackie SR24.4
"Phil Allison" wrote in message
... John Smith wrote: Does anyone have any experience with the Mackie SR24.4 A customer asked if I could repair one which he said had a power issue. So I was hoping for an easy power supply repair but on opening it I find this in channel 11. s651.photobucket.com/user/jbloggs2/library Sorry Mr Customer I don't think it's going to be repairable. ** It might take a bit of time and work, but that looks repairable to me. Mackie don't bother to de-couple each channel with fusible resistors in case of a short. Op-amps can be the cause and then PSU delivers up to 20 watts of heat into one - starting a small fire. I would start by removing all the burnt parts and seeing if the PSU fault is cleared. Yes I probably could repair it by cutting out the burn, bridging the tracks, and remaking the circuit on the back of the board with a DIP version of the opamp (if it's a failed opamp) and the relavant components. However the customer has decided not to go that far and just wants the channel 1-14 board disconnected. ... Phil |
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