zapco ag 350 - Page 3 - 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 24th August 2007, 02:21 AM   #21
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
You said earlier that the voltage on leg 3 of Q30 would drop when you applied remote voltage. The jumper will prevent the voltage from dropping (assuming that the trace is damaged/corroded under the caps).

.
  Reply With Quote
Old 24th August 2007, 02:28 AM   #22
genes66 is offline genes66  United States
diyAudio Member
 
Join Date: Aug 2007
Default zapco

you are correct about that sorry!! now i understand. what is Q30 used in the circuit for?I have another ag 350 hooked up in car that works can i use it to troubleshoot this amp i am trying to repair? iam worried about possibly damaging the good one any suggestions?.
  Reply With Quote
Old 24th August 2007, 02:31 AM   #23
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Leave the good one alone.

The next hing you need to do is to connect the jumper (fused) across those points.
  Reply With Quote
Old 24th August 2007, 02:41 AM   #24
genes66 is offline genes66  United States
diyAudio Member
 
Join Date: Aug 2007
Default zapco

i will get some fuses tomorrow and do that and give you the results thanks for all your help
  Reply With Quote
Old 24th August 2007, 04:43 PM   #25
genes66 is offline genes66  United States
diyAudio Member
 
Join Date: Aug 2007
Default zapco ag 350 car amp

hey i ran a jumper like you told me and the power led came on whats next ? you said replace caps does it matter who makes the caps and what brand do you recommend?
  Reply With Quote
Old 24th August 2007, 09:10 PM   #26
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
You need to pull the capacitors so you can examine the board and the caps. If there is an odor that smells like antifreeze when you apply heat to the terminals of the capacitors, there is electrolyte on the board and that means the caps must be replaced. This is likely what you'll find.


I'd suggest the FC series capacitors at Digikey.com. You'll need to measure the diameter, height and lead spacing to get the correct capacitor. Do an initial search like this (replace the values with the ones from your capacitors):

capacitor FC 1000uf 35v

Then go to the catalog pages for each cap to see which fits your amp.

You will need to run another jumper permanently. It doesn't need to be fused. The fuse was to help prevent additional damage in case there were other problems.
  Reply With Quote
Old 25th August 2007, 12:22 AM   #27
genes66 is offline genes66  United States
diyAudio Member
 
Join Date: Aug 2007
Default zapco

i have to run a jumper from d6 and d7 to Q30 permanantly?why?
  Reply With Quote
Old 25th August 2007, 12:36 AM   #28
twon007 is offline twon007  United States
diyAudio Member
 
Join Date: Mar 2007
or can't he just get a trace repair?
  Reply With Quote
Old 25th August 2007, 01:48 AM   #29
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The jumper replaces the trace that's likley been eaten away by electrolyte. The trace is under the capacitor. There is no practical way to repair the trace since the cap must sit directly on the board. The original trace was only ~0.002" thick. Virtually any repair will be much thicker. The jumper is the only practical repair.

When you run the permanent jumper, you should tack it to the board at several points with an adhesive. This will prevent it from moving which would eventually lead to it breaking near the ends.
  Reply With Quote
Old 25th August 2007, 06:28 AM   #30
genes66 is offline genes66  United States
diyAudio Member
 
Join Date: Aug 2007
Default xtant a2002 amp

sometimes it cuts off and you can hear a buzzing inside amp i opened it to listen cannot trace wear sound might be coming from maybe caps its hard to say does any one know about this
  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
HELP!! Looking for Zapco oldshoolaudio Car Audio 6 22nd June 2009 10:57 PM
zapco ag 350 genes66 Car Audio 2 28th August 2007 02:31 AM
Zapco Z400C4-SL scott-leanne Car Audio 23 13th May 2006 08:44 PM
Zapco SX-SL Processor.... ? coogj1 Car Audio 2 4th February 2005 03:22 AM


New To Site? Need Help?

All times are GMT. The time now is 09:39 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