lanzar 50c problems - Page 2

Perry Babin · 26th March 2009, 04:08 AM

Did the op-amps have positive AND negative voltage?

Did you reconnect the jumpers you cut to isolate the audio section?

67elcamino · 26th March 2009, 08:32 PM

yes the ops had neg and pos voltage and yes i reconnected the jumpers for the audio side.

Perry Babin · 26th March 2009, 09:11 PM

Do you have positive/negative rail voltage on the center legs of the rectifiers?

Black probe on a non-bridging speaker terminal when measuring the voltage.

67elcamino · 26th March 2009, 09:58 PM

ok some weird sh$t just happened when i tried that. at first i had nothing to the right one and when i touched the left one to the middle leg it made a big spark!! then all the sudden they work every thing that didnt have power now does. the right one has 19v and left has -19v. and i checked the outputs again and now they have 20v to the center leg also!!! dont know what just happened. the amp was making a real high pitch noise when it first powered up. then that big spark when i tried to check the rectifier, now no high pitch sound. tried to shut off amp and turn it back on to check everything again. and everything still works!!!??? but i still havent checked it for sound.

Perry Babin · 26th March 2009, 10:04 PM

The rectifier likely has a broken leg or a broken solder connection.

67elcamino · 28th March 2009, 07:03 PM

SWEET!!!! this amp is working perfectly now. i fixed the connection on the rectifier and all is well. thanks again for all your help. just one more question about this thing. when bridging this amp do i use left pos. and right neg. or both positives? i see the previous owner had screws only in the positive terminals. i just want to make sure i bridge it correctly.

trevor

Perry Babin · 29th March 2009, 12:50 AM

You bridge it with the two terminals that do NOT have 0 ohm continuity between them.

26th March 2009, 04:08 AM	#11
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Did the op-amps have positive AND negative voltage? Did you reconnect the jumpers you cut to isolate the audio section? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

26th March 2009, 09:11 PM	#13
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Do you have positive/negative rail voltage on the center legs of the rectifiers? Black probe on a non-bridging speaker terminal when measuring the voltage. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

26th March 2009, 10:04 PM	#15
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The rectifier likely has a broken leg or a broken solder connection. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

29th March 2009, 12:50 AM	#17
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	You bridge it with the two terminals that do NOT have 0 ohm continuity between them. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

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


	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

26th March 2009, 08:32 PM	#12
67elcamino diyAudio Member Join Date: Mar 2009	yes the ops had neg and pos voltage and yes i reconnected the jumpers for the audio side.

26th March 2009, 09:58 PM	#14
67elcamino diyAudio Member Join Date: Mar 2009	ok some weird sh$t just happened when i tried that. at first i had nothing to the right one and when i touched the left one to the middle leg it made a big spark!! then all the sudden they work every thing that didnt have power now does. the right one has 19v and left has -19v. and i checked the outputs again and now they have 20v to the center leg also!!! dont know what just happened. the amp was making a real high pitch noise when it first powered up. then that big spark when i tried to check the rectifier, now no high pitch sound. tried to shut off amp and turn it back on to check everything again. and everything still works!!!??? but i still havent checked it for sound.

28th March 2009, 07:03 PM	#16
67elcamino diyAudio Member Join Date: Mar 2009	SWEET!!!! this amp is working perfectly now. i fixed the connection on the rectifier and all is well. thanks again for all your help. just one more question about this thing. when bridging this amp do i use left pos. and right neg. or both positives? i see the previous owner had screws only in the positive terminals. i just want to make sure i bridge it correctly. trevor

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Old Lanzar amp problem	skooter	Car Audio	3	10th January 2011 07:54 AM
fault with my lanzar 50c amp	pulsarhks	Car Audio	1	4th March 2009 03:40 AM
Lanzar car dvd player	amphead123	Digital Source	0	22nd February 2008 07:08 PM
lanzar car stereo	candlecutter	Car Audio	4	10th January 2005 03:49 PM
Lanzar 600-S schematic	Diode	Car Audio	0	22nd March 2003 01:39 AM

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