Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 10th March 2004, 12:42 PM   #1
diyAudio Member
 
promitheus's Avatar
 
Join Date: Jan 2001
Location: Germany
Default Parasound HCA-1200 schematic ?

Hi,

I have a Parasound HCA-1200 amplifier that doesn´t turn on it stays in stand-by.
does anybody have a service manual or schematic for this amp?

Thanks in advance.
  Reply With Quote
Old 11th March 2004, 03:25 PM   #2
diyAudio Member
 
promitheus's Avatar
 
Join Date: Jan 2001
Location: Germany
Well this is one more try to get some help.
I have asked Parasound for help but not much yet.
If anybody can help please post.
  Reply With Quote
Old 12th March 2004, 05:24 AM   #3
diyAudio Member
 
john curl's Avatar
 
Join Date: Jul 2003
Location: berkeley ca
Pro. I have a 1200mk2 schematic on adobe acrobat that I can send you, just email me at j_curl@earthlink.net, if this will help. If not, email Parasound at Tony@parasound.com. He just sent me a schematic this week the same way.
  Reply With Quote
Old 12th March 2004, 07:19 AM   #4
diyAudio Member
 
promitheus's Avatar
 
Join Date: Jan 2001
Location: Germany
Thanks for the tip.

I already sent you an email for your schematic.
If possible I would like to have it.
I also sent an email to the guy you told me at Parasound.

Thanks a lot.
  Reply With Quote
Old 12th March 2004, 11:27 PM   #5
diyAudio Member
 
john curl's Avatar
 
Join Date: Jul 2003
Location: berkeley ca
The first thing that I would try to measure is output offset. If it is too much, then the protection relay will not close. This is also true of any input offset from your preamp.
  Reply With Quote
Old 13th March 2004, 10:27 PM   #6
diyAudio Member
 
promitheus's Avatar
 
Join Date: Jan 2001
Location: Germany
Thanks a lot for the schematics and suggestions.
I will see what´s wrong with it and post the results.
  Reply With Quote
Old 14th March 2004, 07:40 PM   #7
diyAudio Member
 
Join Date: Mar 2004
Location: Ann Arbor
Send a message via AIM to rmhuizenga
Tony seems to be pretty quick about the schematics. I just bought an HCA-3500 and he had schematics to me within a couple of hours. Heck of an amp for only $850 used. The parts alone would cost 3x that to buy!

One thing I'd be curious about Promitheus--Is the supply capacitance in the amp / on the schematic the same, and does it match up with Parasound's claims? I was a little surprised when I got the HCA-3500 to find only 66000uF per channel instead of the ~98000uF Parasound claims on the website and in the manual..
  Reply With Quote
Old 14th March 2004, 08:32 PM   #8
diyAudio Member
 
promitheus's Avatar
 
Join Date: Jan 2001
Location: Germany
well on the schematic i see only 60 000 uF. There are 4 caps of 15000uF.
  Reply With Quote
Old 14th March 2004, 11:11 PM   #9
diyAudio Member
 
john curl's Avatar
 
Join Date: Jul 2003
Location: berkeley ca
You have to count ALL the caps, not just the big power caps. You have driver supply caps, etc, as well. That's marketing! Still a good buy. I couldn't buy the parts at that price.
  Reply With Quote
Old 16th March 2004, 12:23 AM   #10
diyAudio Member
 
Join Date: Mar 2004
Location: Ann Arbor
Send a message via AIM to rmhuizenga
Yup.. I added them all up and sure enough, it came within a few uF of the quoted figure. Nice marketing gimmick, and it clears up one of the difference between the JC-1 and the 3500 I'd wondered about before I bought the 3500. Using Parasound's quoted figures the claim for twice the capacitance Mr. Crump and yourself had mentioned was always confusing. Time to tack in my stack of el-cheapo Teapo caps.

Considering the high quality parts and great design, it's a steal. At $200 for the outputs, $300 for the trannies, $300 for the caps, having it all assembled into an amp with PCBs and other parts and a chassis for $800 was a deal.

POOGE time?
  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
Parasound 1200 II left channel static and.... AJ Bertelson Solid State 34 11th February 2013 12:28 PM
Parasound HCA-1200 Leon1 Solid State 0 16th January 2008 06:02 PM
Parasound HCA-1200 Rod Solid State 0 21st November 2006 06:32 AM
Beomaster 1200 schematic JDeV Solid State 1 28th February 2005 05:50 PM


New To Site? Need Help?

All times are GMT. The time now is 05:03 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