Rockford fosgate 800a2 - Page 4

fongman · 9th February 2009, 11:44 PM

most of the green one measure .4 and two measure over 100 and the
r325 measure 10 ohm.

Perry Babin · 10th February 2009, 12:29 AM

Quote:

on the 101 i get 100.2 on the 1001 i get 998 are these okay

Yes. The ones with 4 digits have 3 significant digits and a multiplier. 1001 is 1, 0, 0 and 1 zero (1000 ohms). They have a 1% tolerance. The ones with 3 digits have a 5% tolerance.

R325 is OK.

The 0.1 ohm resistors that measure 0.4 ohms are probably OK. If you touch your meter leads together, they will probably read 0.3 ohms. You have to subtract that from the actual reading when reading low value components. You must replace at least 5 of the 0.1 ohm resistors. I'd replace them all. The difference in cost won't be significant.

If you buy from Mouser, I'd recommend these:
LVR03R1000FB12

Perry Babin · 10th February 2009, 12:31 AM

Email me.

babin_perry@yahoo.com

fongman · 20th February 2009, 05:14 AM

just replace all the parts i got from mouser and now the amp is working. Thanks perry for you help and time.

81300sd · 25th February 2009, 09:27 AM

Thread hijack.

I just bought a power 1000a2 with one side blown.

Visual inspection shows 10 mosfets blown 10 resistors blown and atleast 2 of the 1001 resistors blown(r355, r385)

Although the graphic posted differs from mine slightly, it seems to be the same monster. Can I assume that I should follow the same procedure?

I may send this to a shop as soldering those little ones scares me.

Perry Babin · 25th February 2009, 09:44 AM

The procedure is essentially the same. Which 10 resistors are blown?

fongman · 25th February 2009, 01:59 PM

I actually enjoy doing the work, But its totally up to you.

Perry Babin · 25th February 2009, 02:53 PM

81300sd:
Can you send me a photo of the inside of the amp?

babin_perry@yahoo.com

This may be the same as the 1100a2. If so, it has a completely different audio amplifier section than the 800a2.

If it's like the 1100a2, you'll need to start a new thread.

81300sd · 26th February 2009, 11:40 AM

Well I got a schematic from Rockford for the 1000a2 and its for a 1100a2 so I am guessing its the same as the 1100a2

Heres a pic of the bad section. Everything with red arrows is confirmed dead.

Twoloudnproud · 28th February 2009, 08:35 AM

Thank You Perry Babin by finding thread on the 800a2 i was able to the figure out the problem and get my amp back working all the parts that you told the other guy to check was also bad in my amp Thank You again.

10th February 2009, 12:31 AM	#33
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Email me. babin_perry@yahoo.com __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

25th February 2009, 09:44 AM	#36
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The procedure is essentially the same. Which 10 resistors are blown? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

25th February 2009, 02:53 PM	#38
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	81300sd: Can you send me a photo of the inside of the amp? babin_perry@yahoo.com This may be the same as the 1100a2. If so, it has a completely different audio amplifier section than the 800a2. If it's like the 1100a2, you'll need to start a new thread. __________________ 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
rockford fosgate 1500 bd	mike49504	Car Audio	18	30th December 2008 07:37 AM
Rockford Fosgate 325.1	phreaktor	Swap Meet	1	28th February 2008 11:54 PM
rockford 800a2 fried channel help .	ethridgeruby	Car Audio	3	27th July 2005 06:09 PM
rockford 800a2 fried channel help .	ethridgeruby	Solid State	1	22nd July 2005 08:02 AM
New Rockford Fosgate amp. $50.00	NerdMike	Swap Meet	0	4th March 2005 11:57 PM


	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

9th February 2009, 11:44 PM	#31
fongman diyAudio Member Join Date: Jan 2009	most of the green one measure .4 and two measure over 100 and the r325 measure 10 ohm.

20th February 2009, 05:14 AM	#34
fongman diyAudio Member Join Date: Jan 2009	just replace all the parts i got from mouser and now the amp is working. Thanks perry for you help and time.

25th February 2009, 09:27 AM	#35
81300sd diyAudio Member Join Date: Feb 2009	Thread hijack. I just bought a power 1000a2 with one side blown. Visual inspection shows 10 mosfets blown 10 resistors blown and atleast 2 of the 1001 resistors blown(r355, r385) Although the graphic posted differs from mine slightly, it seems to be the same monster. Can I assume that I should follow the same procedure? I may send this to a shop as soldering those little ones scares me.

25th February 2009, 01:59 PM	#37
fongman diyAudio Member Join Date: Jan 2009	I actually enjoy doing the work, But its totally up to you.

26th February 2009, 11:40 AM	#39
81300sd diyAudio Member Join Date: Feb 2009	Well I got a schematic from Rockford for the 1000a2 and its for a 1100a2 so I am guessing its the same as the 1100a2 Heres a pic of the bad section. Everything with red arrows is confirmed dead.

28th February 2009, 08:35 AM	#40
Twoloudnproud diyAudio Member Join Date: Feb 2009	Thank You Perry Babin by finding thread on the 800a2 i was able to the figure out the problem and get my amp back working all the parts that you told the other guy to check was also bad in my amp Thank You again.

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