SC480 Troubles....

Tensop · 7th February 2004, 09:01 AM

hi guys, most of us in australia know what an sc480 amp module is so i guess this is directed at you. I'm getting +22v DC offset on the speaker outputs and the negative rail isnt discharging at all when power is switched off, does anyone have any ideas as to the cause of this problem?

b<ben>n · 7th February 2004, 10:44 AM

why dont u e-mail silicon chip

sss · 7th February 2004, 11:57 AM

Quote:

Originally posted by Tensop
I'm getting +22v DC offset on the speaker outputs

check the output transistors ,if ok check if the feedback is not disconnected

Tensop · 7th February 2004, 09:51 PM

Ok, got it working. was a faulty transistor on the negative feedback, replaced and fixed.

thanks sss

palesha · 8th February 2004, 10:44 AM

Congrates! we hv heard a lot about SC480. How about giving schematics of the circuit? We will be happy to study it.
MP

AudioFreak · 8th February 2004, 11:00 AM

I'm not sure, but I suspect that the schematic for the SC480 amplifier as published by Silicon Chip is protected by a current copyright. That being the case, you should not post it here.

Workhorse · 8th February 2004, 11:33 AM

Quote:

Originally posted by AudioFreak
I'm not sure, but I suspect that the schematic for the SC480 amplifier as published by Silicon Chip is protected by a current copyright. That being the case, you should not post it here.

Thats True They have copyrights and u shouldnot post it here.

Regards
Ampman

Tensop · 8th February 2004, 06:04 PM

Quote:

Originally posted by AudioFreak
I'm not sure, but I suspect that the schematic for the SC480 amplifier as published by Silicon Chip is protected by a current copyright. That being the case, you should not post it here.

thats true, and is the reason why i did not post a schematic. however there are amps that are... extremely close in design, that are F.T.P

palesha · 1st March 2004, 05:39 AM

Atleast tell us the issue of Silicon chip so that we can call it.
MP

b<ben>n · 1st March 2004, 07:12 AM

jan 03
and feb 03
of silicon chip

7th February 2004, 09:01 AM	#1
Tensop diyAudio Member Join Date: Jul 2003 Location: Chapel St.	SC480 Troubles.... hi guys, most of us in australia know what an sc480 amp module is so i guess this is directed at you. I'm getting +22v DC offset on the speaker outputs and the negative rail isnt discharging at all when power is switched off, does anyone have any ideas as to the cause of this problem?

8th February 2004, 11:00 AM	#6
AudioFreak Warp Engineer On Holiday Join Date: Oct 2001 Location: Queensland, Australia	I'm not sure, but I suspect that the schematic for the SC480 amplifier as published by Silicon Chip is protected by a current copyright. That being the case, you should not post it here. __________________ - Dan

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7th February 2004, 10:44 AM	#2
b<ben>n diyAudio Member Join Date: Dec 2003 Location: in my house	why dont u e-mail silicon chip

7th February 2004, 09:51 PM	#4
Tensop diyAudio Member Join Date: Jul 2003 Location: Chapel St.	Ok, got it working. was a faulty transistor on the negative feedback, replaced and fixed. thanks sss

8th February 2004, 10:44 AM	#5
palesha diyAudio Member Join Date: Nov 2001 Location: Pune India	Congrates! we hv heard a lot about SC480. How about giving schematics of the circuit? We will be happy to study it. MP

1st March 2004, 05:39 AM	#9
palesha diyAudio Member Join Date: Nov 2001 Location: Pune India	Atleast tell us the issue of Silicon chip so that we can call it. MP

1st March 2004, 07:12 AM	#10
b<ben>n diyAudio Member Join Date: Dec 2003 Location: in my house	jan 03 and feb 03 of silicon chip

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