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

Orion HCCA 2100 no rail voltage.
Orion HCCA 2100 no rail voltage.
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 4th April 2019, 11:44 PM   #141
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The gate voltage has to be much lower to turn the muting transistors off.
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version.
  Reply With Quote
Old 5th April 2019, 12:01 AM   #142
Chopperbuilder is offline Chopperbuilder  United States
diyAudio Member
 
Join Date: May 2018
Location: St. Louis
Yes, I remember from the HCCA 225. I see that the circuit is very similar in this amp but it is laid out different.
__________________
Multimeter: Blue Point - Model: MT586B / Oscilloscope: Leader - Model: LBO-524 / Power Supply: Modified computer 500 watt
  Reply With Quote
Old 5th April 2019, 12:22 AM   #143
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
If you're going to work on a lot of these amps, you need to learn the circuits and how they work, regardless of the layout.
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version.
  Reply With Quote
Old 5th April 2019, 12:24 AM   #144
Chopperbuilder is offline Chopperbuilder  United States
diyAudio Member
 
Join Date: May 2018
Location: St. Louis
That is exactly what I'm trying to do is learn the circuits and how they work.
__________________
Multimeter: Blue Point - Model: MT586B / Oscilloscope: Leader - Model: LBO-524 / Power Supply: Modified computer 500 watt
  Reply With Quote
Old 5th April 2019, 12:30 AM   #145
Chopperbuilder is offline Chopperbuilder  United States
diyAudio Member
 
Join Date: May 2018
Location: St. Louis
Schematics would be a large help.
__________________
Multimeter: Blue Point - Model: MT586B / Oscilloscope: Leader - Model: LBO-524 / Power Supply: Modified computer 500 watt
  Reply With Quote
Old 5th April 2019, 12:36 AM   #146
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
For the most part, for the old amps, you have to make them yourself or get them from someone who has taken the time to make them. Very few were distributed by the manufacturer at the time. If they were, they were faxed and some of the copies are multi-generation fax copies.
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version.
  Reply With Quote
Old 5th April 2019, 02:30 AM   #147
Chopperbuilder is offline Chopperbuilder  United States
diyAudio Member
 
Join Date: May 2018
Location: St. Louis
Taken a step backwards. Pulled the muting transistors to see if the amp achieved full output. Not sure if it was at full output ( didn't have it powered on long enough to be sure) but it had significantly increased. Almost immediately the 6491 that was shorted before heated up and blew out.

Replaced it and then checked the emitter resisters they were all reading between 0.007v and 0.009v. I pulled all the output transistors on that side and checked them, they all tested good.
__________________
Multimeter: Blue Point - Model: MT586B / Oscilloscope: Leader - Model: LBO-524 / Power Supply: Modified computer 500 watt
  Reply With Quote
Old 5th April 2019, 04:11 AM   #148
Chopperbuilder is offline Chopperbuilder  United States
diyAudio Member
 
Join Date: May 2018
Location: St. Louis
With the lamp back in circuit on the red wire that feeds the audio circuit, all output transistors on that side pulled, the lamp very dimly illuminates.
__________________
Multimeter: Blue Point - Model: MT586B / Oscilloscope: Leader - Model: LBO-524 / Power Supply: Modified computer 500 watt

Last edited by Chopperbuilder; 5th April 2019 at 04:15 AM.
  Reply With Quote
Old 5th April 2019, 04:26 AM   #149
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Do you have essentially the same DC voltage across all of the emitter resistors in that channel? The voltage across these resistors tells you where the current is flowing. That's why the higher voltage for one of the emitter resistors for one of the output transistors pointed to a problem.
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version.
  Reply With Quote
Old 5th April 2019, 04:48 AM   #150
Chopperbuilder is offline Chopperbuilder  United States
diyAudio Member
 
Join Date: May 2018
Location: St. Louis
That's what I went looking for before I posted. All the output transistors on that side are still pulled out of circuit. The DC voltage across the emitter resistors is 0.000v. Before I pulled the resistors they were all between 0.007v and 0.009v.
__________________
Multimeter: Blue Point - Model: MT586B / Oscilloscope: Leader - Model: LBO-524 / Power Supply: Modified computer 500 watt

Last edited by Chopperbuilder; 5th April 2019 at 04:56 AM.
  Reply With Quote

Reply


Orion HCCA 2100 no rail voltage.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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Orion HCCA 2100 fan-what one and where to buy? mclsound Car Audio 6 1st May 2012 12:09 AM
orion 2100 HCCA amplifier trustyrusty10 Power Supplies 3 1st June 2010 01:31 AM
Orion 250 HCCA no rail voltage ECM Car Audio 3 12th March 2010 07:43 AM
orion 2100 hcca mike49504 Car Audio 11 11th February 2008 02:14 PM
Q Orion HCCA 2100 competition amp Leif Car Audio 7 13th October 2006 06:10 AM


New To Site? Need Help?

All times are GMT. The time now is 01:07 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki