Kicker ZR240 - Page 3

m4ick · 21st July 2011, 10:03 PM

There is also +13.1v and +12.7 at the emitter resistors.

m4ick · 21st July 2011, 10:10 PM

And it still does produce -15v for about a second before it disappears. And +15 is steady.

Perry Babin · 21st July 2011, 11:00 PM

The -15v reg could be defective. If you have a 1 ohm resistor, connect it between the 3rd leg of the regulator and the board. Connect a meter directly across the 1 ohm resistor. If the voltage across the resistor never gets near 1v, the regulator is very likely defective. If the voltage across the 1 ohm resistor is 1v or more, the current draw from the regulator could be shutting it down.

m4ick · 25th July 2011, 07:21 PM

There is about .2V across the 1 ohm resistor.

I've been looking for the LM7915CT and have found it in a TO-220 and TO-220AB.

What's the difference in those packages?

Perry Babin · 26th July 2011, 03:16 AM

There's essentially no difference.

m4ick · 2nd August 2011, 07:28 PM

With the new regulator installed I have a steady +15 and -15. It is still in protect, one channel has no DC and the other shows -.4v and climbing (toward the negatives) at the emitter resistors.

m4ick · 2nd August 2011, 08:11 PM

Power supply fets are now getting hot quickly as well.

Perry Babin · 3rd August 2011, 01:38 AM

Which channel has the DC?

Did you replace the power supply FETs?

What work have you done to the channel with DC?

m4ick · 02:35 AM

The channel I did not repair has DC in the negatives and slowly going negative.

Replaced PS fets with 75344G3.

None.

Perry Babin · 3rd August 2011, 07:21 AM

Left channel? Right channel?

21st July 2011, 10:03 PM	#21
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	There is also +13.1v and +12.7 at the emitter resistors. __________________ Scope - DMM - 460W Computer PSU - Tutorial

21st July 2011, 10:10 PM	#22
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	And it still does produce -15v for about a second before it disappears. And +15 is steady. __________________ Scope - DMM - 460W Computer PSU - Tutorial

21st July 2011, 11:00 PM	#23
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The -15v reg could be defective. If you have a 1 ohm resistor, connect it between the 3rd leg of the regulator and the board. Connect a meter directly across the 1 ohm resistor. If the voltage across the resistor never gets near 1v, the regulator is very likely defective. If the voltage across the 1 ohm resistor is 1v or more, the current draw from the regulator could be shutting it down. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

25th July 2011, 07:21 PM	#24
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	There is about .2V across the 1 ohm resistor. I've been looking for the LM7915CT and have found it in a TO-220 and TO-220AB. What's the difference in those packages? __________________ Scope - DMM - 460W Computer PSU - Tutorial

26th July 2011, 03:16 AM	#25
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	There's essentially no difference. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links


	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

2nd August 2011, 07:28 PM	#26
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	With the new regulator installed I have a steady +15 and -15. It is still in protect, one channel has no DC and the other shows -.4v and climbing (toward the negatives) at the emitter resistors. __________________ Scope - DMM - 460W Computer PSU - Tutorial

2nd August 2011, 08:11 PM	#27
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	Power supply fets are now getting hot quickly as well. __________________ Scope - DMM - 460W Computer PSU - Tutorial

3rd August 2011, 01:38 AM	#28
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Which channel has the DC? Did you replace the power supply FETs? What work have you done to the channel with DC? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

3rd August 2011, 02:30 AM	#29
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	The channel I did not repair has DC in the negatives and slowly going negative. Replaced PS fets with 75344G3. None. __________________ Scope - DMM - 460W Computer PSU - Tutorial Last edited by m4ick; 3rd August 2011 at 02:35 AM.

3rd August 2011, 07:21 AM	#30
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Left channel? Right channel? __________________ 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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Smoke rolled out of Kicker ZR240 amp	chipper	Car Audio	13	13th July 2010 09:50 AM
Kicker ZR240	kyle0826	Car Audio	2	19th February 2010 02:26 AM
hello im having a problem 2 i have a kicker zr240	honeyeyedboi_03	Class D	1	4th November 2009 10:58 PM
I need help with blown kicker ZR240!	chipper	Car Audio	5	13th February 2009 09:14 PM

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