Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Ap-3000
Ap-3000
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 20th October 2018, 11:32 PM   #1
megael9 is offline megael9
diyAudio Member
 
Join Date: Oct 2009
Ap-3000
Default Ap-3000

Low audio
__________________
fluke 50 mhz scope,35 amp power supply,0.5-12v adj power supply, fluke 179,hot air desolder gun, merit multyfuntion signal tracer/generator.
  Reply With Quote
Old 21st October 2018, 02:23 AM   #2
megael9 is offline megael9
diyAudio Member
 
Join Date: Oct 2009
Ap-3000
This amp have very low audio. The power supply is Ok, and the pre +12 -12 is also good.
The problem is that the audio is very low, and there's a POP on power On.
Thanks in advance
__________________
fluke 50 mhz scope,35 amp power supply,0.5-12v adj power supply, fluke 179,hot air desolder gun, merit multyfuntion signal tracer/generator.
  Reply With Quote
Old 21st October 2018, 02:57 AM   #3
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
If that's the actual, complete model number, post a photo of the board.
  Reply With Quote
Old 21st October 2018, 02:55 PM   #4
megael9 is offline megael9
diyAudio Member
 
Join Date: Oct 2009
Ap-3000
Default Picture

Picture
Attached Images
File Type: jpg 1EAAFFCC-46FF-4F63-A308-B70CD3E8D1A1.jpg (966.7 KB, 25 views)
__________________
fluke 50 mhz scope,35 amp power supply,0.5-12v adj power supply, fluke 179,hot air desolder gun, merit multyfuntion signal tracer/generator.
  Reply With Quote
Old 21st October 2018, 04:13 PM   #5
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Is the audio output clean but low?

Do all controls work as they should on the front of the amp?
  Reply With Quote
Old 21st October 2018, 06:15 PM   #6
megael9 is offline megael9
diyAudio Member
 
Join Date: Oct 2009
Ap-3000
The audio is so low that it is hard to tell if it is clean, and All controls looks and feel Ok.
__________________
fluke 50 mhz scope,35 amp power supply,0.5-12v adj power supply, fluke 179,hot air desolder gun, merit multyfuntion signal tracer/generator.
  Reply With Quote
Old 21st October 2018, 06:17 PM   #7
megael9 is offline megael9
diyAudio Member
 
Join Date: Oct 2009
Ap-3000
Do you know what's the audio IN pin for the driver card?
__________________
fluke 50 mhz scope,35 amp power supply,0.5-12v adj power supply, fluke 179,hot air desolder gun, merit multyfuntion signal tracer/generator.
  Reply With Quote
Old 21st October 2018, 06:19 PM   #8
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Do you have rail-rail oscillation on the output transistors of both boards?

The following diagram should be close.
http://www.bcae1.com/temp/SLA1500.pdf
  Reply With Quote
Old 22nd October 2018, 02:43 AM   #9
megael9 is offline megael9
diyAudio Member
 
Join Date: Oct 2009
Ap-3000
The schematic helped me to find the problem. It was the Op amp U1.
After it was replaced everything is working Ok.
Thank you Perry.
__________________
fluke 50 mhz scope,35 amp power supply,0.5-12v adj power supply, fluke 179,hot air desolder gun, merit multyfuntion signal tracer/generator.
  Reply With Quote

Reply


Ap-3000Hide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Crunch GP 3000 mike49504 Car Audio 57 24th May 2011 06:43 PM
3000 w rms classe D foxeletronic Class D 3 21st November 2009 03:29 PM
the best diy speakers for $3000! legendaryfrog Multi-Way 93 19th December 2006 02:05 AM
3000 posts! Elso Kwak The Lounge 39 11th March 2006 06:45 PM


New To Site? Need Help?

All times are GMT. The time now is 12:34 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki