lanzar la670 schematics

onarush · 22nd June 2008, 11:17 PM

Hi everyone I'm kind of new in this forum but it really seems like a great community, i was hoping you could help I'm searching for the schematics for a Lanzar la670 250w x 4 amp, i would really appreciate if anyone could help me, thanks in advance to whom might help.

Perry Babin · 22nd June 2008, 11:41 PM

Lanzar or Legacy?

What's wrong with the amp?

onarush · 23rd June 2008, 12:14 AM

it says legacy and it has 2 blown transistors but i don not know which transistors should i use and they me that if it was possible to get schematics so that i put on the right transistors, ps sorry for my English

Perry Babin · 23rd June 2008, 12:44 AM

I don't have the schematic.

What are the numbers on the blown transistors?

onarush · 23rd June 2008, 06:46 AM

the transistors are so burned that they don't have any numbers there are 4 transistors 2 of them blown but I really don't know if there the same transistors

Perry Babin · 23rd June 2008, 08:03 AM

If the center leg of the 2 un-burned transistors goes to one primary winding of the transformer and the center leg of the 2 burned transistors goes to the other primary winding, they are the same part number. You need to replace all 4 of them.

onarush · 23rd June 2008, 11:40 AM

ooh ok, I will try that today, I will let you know my results, really thanks for the and specially the fast reply, I'm kind of a noob in repairing amps so really thank you for the help one more thing I noticed I has thermal compund but it is old I should replace it right?, by the way I'm loving this forum

Perry Babin · 23rd June 2008, 03:53 PM

Yes. Remove all of the old compound from the transistors and the heatsink and apply new compound.

22nd June 2008, 11:17 PM	#1
onarush diyAudio Member Join Date: Jun 2008	lanzar la670 schematics Hi everyone I'm kind of new in this forum but it really seems like a great community, i was hoping you could help I'm searching for the schematics for a Lanzar la670 250w x 4 amp, i would really appreciate if anyone could help me, thanks in advance to whom might help.

22nd June 2008, 11:41 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Lanzar or Legacy? What's wrong with the amp? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

23rd June 2008, 12:14 AM	#3
onarush diyAudio Member Join Date: Jun 2008	sorry, and thanks for the fast reply! it says legacy and it has 2 blown transistors but i don not know which transistors should i use and they me that if it was possible to get schematics so that i put on the right transistors, ps sorry for my English

23rd June 2008, 12:44 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I don't have the schematic. What are the numbers on the blown transistors? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

23rd June 2008, 08:03 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If the center leg of the 2 un-burned transistors goes to one primary winding of the transformer and the center leg of the 2 burned transistors goes to the other primary winding, they are the same part number. You need to replace all 4 of them. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links


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23rd June 2008, 06:46 AM	#5
onarush diyAudio Member Join Date: Jun 2008	the transistors are so burned that they don't have any numbers there are 4 transistors 2 of them blown but I really don't know if there the same transistors

23rd June 2008, 11:40 AM	#7
onarush diyAudio Member Join Date: Jun 2008	ooh ok, I will try that today, I will let you know my results, really thanks for the and specially the fast reply, I'm kind of a noob in repairing amps so really thank you for the help one more thing I noticed I has thermal compund but it is old I should replace it right?, by the way I'm loving this forum

23rd June 2008, 03:53 PM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Yes. Remove all of the old compound from the transistors and the heatsink and apply new compound. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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