SoundCraft M8 smps version question

[km6xz]

I have a M8 which uses the SC4105 issue 06 switcher supply. I have an issue 04 schematic which is close but there is a burned SMD resistor tacked on to two pins of the PWM (UC3842 ) which are not shown on the 04 print. Anyone have a print for the 06 issue supply board? I would like to add it to my collection of Soundcraft schematics, or at least have someone look it up and see what that 06 revision.
This one had the primary melt down: shorted switching mosfet, PWM, burned Source resistors, open gate resistor etc. Still does not sustain oscillation.

[spiros]

burnt resistor on SC4105

I have a M8 which uses the SC4105 issue 06 switcher supply. I have an issue 04 schematic which is close but there is a burned SMD resistor tacked on to two pins of the PWM (UC3842 ) which are not shown on the 04 print. Anyone have a print for the 06 issue supply board? I would like to add it to my collection of Soundcraft schematics, or at least have someone look it up and see what that 06 revision.
This one had the primary melt down: shorted switching mosfet, PWM, burned Source resistors, open gate resistor etc. Still does not sustain oscillation.

Hi km6xz,

I also have SC4105-06 and i have R45 quite burnt so i cannot read it's value. Maybe the value would be indicated on the issue 04 schematic that you posses. Could you maybe have a look or share the schematic?

[Justin Thomas]

Just so you know, Stan left here years ago... This thread is 5 years old. You can try asking in the schematic requests forum, too.

Good luck!

Justin

[spiros]

sorry to hear about that. i will try my luck in the schematics section.

[The Dude]

Since all of your posts link to AllICData and have nothing to do with the threads you post in, I've reported your post as spam. It'd be wise to stop.