Unidentified Op-amp??? - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

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
Thread Tools Search this Thread
Old 23rd April 2008, 11:50 AM   #1
diyAudio Member
Join Date: Apr 2008
Unhappy Unidentified Op-amp???

Recently bought a second hand amp, The t.amp TA-2000. One channel isn't working. A visual inspection has revealed what I believe to be a popped op-amp. It is a 14 pin socket component and the only identification on it is HEFF1. I've described it as popped or blown because there is a approx. 5 mm disc shaped chunk missing from the middle of it. Searching the net with the HEFF1 refference has proved fruitless so I would appreciate any info as I would like to get the second channel up and running.

  Reply With Quote
Old 24th April 2008, 05:00 PM   #2
KSTR is offline KSTR  Germany
diyAudio Member
KSTR's Avatar
Join Date: Jul 2007
Location: Central Berlin, Germany
Hhm, "HEF" sounds more like 4000 CMOS series of logic gates.

You might check if the power is applied to the chip at pins 7&14 (then it's a logic IC) or pins 4&11, then it's a quad opamp.

Probably you will need to get/buy the service manual for the amp...

- Klaus
  Reply With Quote


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 with unidentified transformer dmh Chip Amps 2 21st February 2005 06:32 AM

New To Site? Need Help?

All times are GMT. The time now is 04:17 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2