Help with rockford 851s - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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
Reply
 
Thread Tools Search this Thread
Old 26th June 2010, 11:28 PM   #1
stoke is offline stoke  ominican Republic
diyAudio Member
 
stoke's Avatar
 
Join Date: Mar 2010
Default Help with rockford 851s

first i was looking for some distortion on the left channel and by mistake i change a lil bit the position of rv405 and some power supply transistor get burn, now i changed those transistor and need to put rv405 and rv404 in the default position.. need to know how
  Reply With Quote
Old 27th June 2010, 12:56 AM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
I don't have any information on this amp but I assume that these are the bias potentiometers. Start with them in the fully counter-clockwise position. All of the transistors must be tightly clamped to the heatsink before you make any adjustments. The power line should have either a current limiter or a 10 amp fuse.

Does your 12v power supply have an amp meter.
  Reply With Quote
Old 16th July 2010, 10:58 PM   #3
stoke is offline stoke  ominican Republic
diyAudio Member
 
stoke's Avatar
 
Join Date: Mar 2010
i have the bais pot on the counter-clockwise top position. now both channel work but the sound is not god quality .. what i can do
  Reply With Quote
Old 16th July 2010, 11:04 PM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Are both channels distorted?
  Reply With Quote
Old 16th July 2010, 11:51 PM   #5
stoke is offline stoke  ominican Republic
diyAudio Member
 
stoke's Avatar
 
Join Date: Mar 2010
Yes
  Reply With Quote
Old 17th July 2010, 01:09 AM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Do you have both positive and negative 15v on the power supply pins of all op-amps?

Do you have both positive and negative rail voltage on the outputs of both channels?
  Reply With Quote
Old 28th August 2010, 07:21 PM   #7
stoke is offline stoke  ominican Republic
diyAudio Member
 
stoke's Avatar
 
Join Date: Mar 2010
yes i have 15v on the power supply pins of all op-amps. and it dosent get loud with volume and gain on top. when i touch the back of the rca i dosent produce any sound but i can just hear the music very low and distorted
  Reply With Quote
Old 28th August 2010, 08:19 PM   #8
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Do you have both positive and negative 15v on the power supply pins of all op-amps?

Do you have both positive and negative rail voltage on the outputs of both channels?
  Reply With Quote
Old 29th August 2010, 06:21 PM   #9
stoke is offline stoke  ominican Republic
diyAudio Member
 
stoke's Avatar
 
Join Date: Mar 2010
im using 800a2 schematic and they look to be the same board of 851s, i got the 17v from pin 8 and 4 together of all op amps
  Reply With Quote
Old 29th August 2010, 06:31 PM   #10
stoke is offline stoke  ominican Republic
diyAudio Member
 
stoke's Avatar
 
Join Date: Mar 2010
i replace u100 and u103 and the problem is still present

Last edited by stoke; 29th August 2010 at 06:43 PM.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
rOCKFORD P8002 edfirebird68 Car Audio 17 6th January 2014 03:12 AM
rockford t5002 Bobdabuilder Car Audio 4 13th April 2010 05:02 PM
ROCKFORD a SERIES mjh7096 Car Audio 4 17th January 2010 06:40 AM
Rockford T20001BD. Need help Chris87 Car Audio 4 15th November 2009 10:47 PM
Help me with Rockford 500bd valterdaw Car Audio 7 19th May 2007 09:43 PM


New To Site? Need Help?

All times are GMT. The time now is 01:39 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2