Soundcraftsmen Pro Control Four

chicane · 11th December 2004, 10:07 PM

Looking for a schematic for one of these...............

Or

If someone that owns one could humor me and take the cover off and possibly tell me the resistor values for R172, 173, 174 and 175. It would make my life much worth living again.

This is concerning the voltage divider network for the LM342 (older series) or LM78xx (newer series) replacement for the TTL voltage regulation. Appearently the surge from energizing the ckt, over the years, has cooked the divider resistors to the point of changing color and effectively shorting the resistors out.

Slab · 1st February 2005, 04:29 AM

I took the lid off! R172,174 220ohm 5%, R173,175 22ohm 5%. I also need a schematic for this (now) classic, before it breaks. If you find one please let me know, or where I can get one.

chicane · 2nd February 2005, 12:44 AM

Don, if you are ever in Vegas, look me up.......beers on me.

I am currently doing a 'pin-point' schematic on this device as soon as I get the new resistors loaded in the ckt. I will be back to find you.......

Thanks again.

Slab · 2nd February 2005, 06:49 AM

Happy to help, and I love BEER, but will not be in Vegas anytime soon. You may want to use 1 watt resistors because mine are showing signs of overheating. The originals look large for 1/4 watt-they might be 1/2w. I tried (too late) to get a schematic for the ...FOUR, but Soundcraftsmen had already been bought by MTX. I tried to get info from MTX twice and never got any kind of reply! Nice company!!! I tried my oyher sources and came up empty. (I used to be a service company and I have lots of contacts/sources.) It is very important for me to get the info, so you can hold the beer and just keep me informed if you come across anything. Thanks!

Speedz · 2nd May 2007, 06:09 AM

well, since i'm new and being "moderated" and cant make my own post even though i've searched through these forums quite a bit.. this thread is about as close as i can get to what i'm wanting.

here goes:

i recently picked up a Soundcraftsmen pro-control three preamp. i want to do some mods to it but really need a schematic for it. also my voltage regulator has 14.73v and should be 15v so i need to figure out whats causing that since i was hoping to get away with using the existing +/- 15v to power the extra circuits i want to add.

any help will be much appriciated.
thanks
Richard

11th December 2004, 10:07 PM	#1
chicane diyAudio Member Join Date: Dec 2004 Location: Vegas	Soundcraftsmen Pro Control Four Looking for a schematic for one of these............... Or If someone that owns one could humor me and take the cover off and possibly tell me the resistor values for R172, 173, 174 and 175. It would make my life much worth living again. This is concerning the voltage divider network for the LM342 (older series) or LM78xx (newer series) replacement for the TTL voltage regulation. Appearently the surge from energizing the ckt, over the years, has cooked the divider resistors to the point of changing color and effectively shorting the resistors out.

1st February 2005, 04:29 AM	#2
Slab diyAudio Member Join Date: Feb 2005 Location: Westfield, NJ	Soundcraftsmen Pro Control Four R172-5 I took the lid off! R172,174 220ohm 5%, R173,175 22ohm 5%. I also need a schematic for this (now) classic, before it breaks. If you find one please let me know, or where I can get one. __________________ Don B gone fishin

2nd February 2005, 06:49 AM	#4
Slab diyAudio Member Join Date: Feb 2005 Location: Westfield, NJ	Happy to help, and I love BEER, but will not be in Vegas anytime soon. You may want to use 1 watt resistors because mine are showing signs of overheating. The originals look large for 1/4 watt-they might be 1/2w. I tried (too late) to get a schematic for the ...FOUR, but Soundcraftsmen had already been bought by MTX. I tried to get info from MTX twice and never got any kind of reply! Nice company!!! I tried my oyher sources and came up empty. (I used to be a service company and I have lots of contacts/sources.) It is very important for me to get the info, so you can hold the beer and just keep me informed if you come across anything. Thanks! __________________ Don B gone fishin

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2nd February 2005, 12:44 AM	#3
chicane diyAudio Member Join Date: Dec 2004 Location: Vegas	Don, if you are ever in Vegas, look me up.......beers on me. I am currently doing a 'pin-point' schematic on this device as soon as I get the new resistors loaded in the ckt. I will be back to find you....... Thanks again.

2nd May 2007, 06:09 AM	#5
Speedz diyAudio Member Join Date: May 2007	well, since i'm new and being "moderated" and cant make my own post even though i've searched through these forums quite a bit.. this thread is about as close as i can get to what i'm wanting. here goes: i recently picked up a Soundcraftsmen pro-control three preamp. i want to do some mods to it but really need a schematic for it. also my voltage regulator has 14.73v and should be 15v so i need to figure out whats causing that since i was hoping to get away with using the existing +/- 15v to power the extra circuits i want to add. any help will be much appriciated. thanks Richard

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