Parasound HCA-1200 schematic ?

promitheus · 10th March 2004, 12:42 PM

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.

promitheus · 11th March 2004, 03:25 PM

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.

john curl · 12th March 2004, 05:24 AM

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.

promitheus · 12th March 2004, 07:19 AM

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.

john curl · 12th March 2004, 11:27 PM

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.

promitheus · 13th March 2004, 10:27 PM

Thanks a lot for the schematics and suggestions.
I will see what´s wrong with it and post the results.

rmhuizenga · 14th March 2004, 07:40 PM

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..

promitheus · 14th March 2004, 08:32 PM

well on the schematic i see only 60 000 uF. There are 4 caps of 15000uF.

john curl · 14th March 2004, 11:11 PM

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.

rmhuizenga · 16th March 2004, 12:23 AM

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?

10th March 2004, 12:42 PM	#1
promitheus diyAudio Member Join Date: Jan 2001 Location: Germany	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.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Parasound 1200 II left channel static and....	AJ Bertelson	Solid State	33	14th January 2011 03:00 AM
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?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

11th March 2004, 03:25 PM	#2
promitheus diyAudio Member 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.

12th March 2004, 05:24 AM	#3
john curl diyAudio Member 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.

12th March 2004, 07:19 AM	#4
promitheus diyAudio Member 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.

12th March 2004, 11:27 PM	#5
john curl diyAudio Member 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.

13th March 2004, 10:27 PM	#6
promitheus diyAudio Member 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.

14th March 2004, 07:40 PM	#7
rmhuizenga diyAudio Member Join Date: Mar 2004 Location: Ann Arbor	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..

14th March 2004, 08:32 PM	#8
promitheus diyAudio Member Join Date: Jan 2001 Location: Germany	well on the schematic i see only 60 000 uF. There are 4 caps of 15000uF.

14th March 2004, 11:11 PM	#9
john curl diyAudio Member 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.

16th March 2004, 12:23 AM	#10
rmhuizenga diyAudio Member Join Date: Mar 2004 Location: Ann Arbor	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?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)