2sc5200 and 2sa1943?

adobetoo · 27th March 2011, 06:11 AM

I have just replaced two pairs of Toshiba's 2SC5200 and 2SA1943 Transistors in a amp module in a power DJ speaker, After doing so the amp now hums and the transistors get extremely hot. What could be causing this? Could it be I have been sold fake transistors?

Adobe.

jalou1995 · 27th March 2011, 07:26 AM

lot of fators to be considered, check the other parts esp caps, diodes and trannies.

ostripper · 27th March 2011, 08:08 AM

Blown OP's, usually = blown drivers as well.
Hum is loaded down power supply ???
OS

AndrewT · 27th March 2011, 08:46 AM

back off the output bias current to zero.
plug in the amp via a bulb tester to the mains.
Tell us if the bulb lights up.

27th March 2011, 06:11 AM	#1
adobetoo diyAudio Member Join Date: Nov 2010	2sc5200 and 2sa1943? I have just replaced two pairs of Toshiba's 2SC5200 and 2SA1943 Transistors in a amp module in a power DJ speaker, After doing so the amp now hums and the transistors get extremely hot. What could be causing this? Could it be I have been sold fake transistors? Adobe.

27th March 2011, 08:08 AM	#3
ostripper diyAudio Member Join Date: May 2008 Location: Albany , NY (smallbany)	Blown OP's, usually = blown drivers as well. Hum is loaded down power supply ??? OS __________________ Mongrel website , always current and updated : http://67.248.209.21/D%3A/WEBSITE/

27th March 2011, 08:46 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	back off the output bias current to zero. plug in the amp via a bulb tester to the mains. Tell us if the bulb lights up. __________________ regards Andrew T.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
2sc5200/2sa1943	stth15r06	Solid State	4	15th March 2011 10:17 AM
2SC5200 / 2SA1943 Looking	funky2x	Solid State	11	15th March 2011 10:14 AM
LME49810 with 2sa1943 and 2sc5200	xeclipse	Solid State	12	15th July 2010 03:35 PM
Is it an advantage to use this one instead of 2SC5200 or 2SA1943?	destroyer X	Solid State	8	11th December 2009 04:57 PM
2SC5200/2SA1943 Toshiba or Fairchild	Rob_S	Solid State	34	6th June 2009 02:16 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

27th March 2011, 07:26 AM	#2
jalou1995 diyAudio Member Join Date: Apr 2005 Location: davao city	lot of fators to be considered, check the other parts esp caps, diodes and trannies.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read