Help/Schematic for Soundstream PCA1500D - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 28th June 2007, 03:27 PM   #1
diyAudio Member
 
Join Date: Oct 2005
Default Help/Schematic for Soundstream PCA1500D

Last night after work, I was setting my gains with an oscilloscope and for some unknown reason the 10x probe introduced about 1/4 ohm resistance between the output rails of my Soundstream PCA1500D car amplifier.

All four fuses blew. I replaced the fuses and the amp let the magic smoke out. I opened the amp and believe I blew two transistors and maybe a few passive components around the transistors.

I really need some help. Does anyone have a schematic for the Soundstream PCA1500D? Or maybe a schematic of one of the other amplifiers in this family? I plan to contact Soundstream tech support but am not expecting to get the schematic from them.

The components that I need to replace don't seem to have any markings on them to identify them.

If you need pictures to identify what components I need to replace, please let me know.

I really appreciate any help that you can give me.

Thanks.
Lon
  Reply With Quote
Old 28th June 2007, 11:50 PM   #2
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
Post or e-mail some close well focused pics, I'll try to get you started
  Reply With Quote
Old 29th June 2007, 05:39 AM   #3
diyAudio Member
 
Join Date: Mar 2007
email sound steam I just did tuesday and they emaild my schematics to me
  Reply With Quote
Old 29th June 2007, 08:27 AM   #4
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
Please share it with me, I only have their older stuff. my e-mail works, I get enough spam from this site to fill a bucket with everyday.

many thanks in advance
  Reply With Quote
Old 29th June 2007, 02:52 PM   #5
diyAudio Member
 
Join Date: Oct 2005
Thank you all for your quick replies. I have emailed Soundstream and will let you know if I hear anything back from them.

I will get pictures of the amplifier this weekend and will post them.

Thanks again.
  Reply With Quote
Old 29th June 2007, 03:44 PM   #6
diyAudio Member
 
Join Date: Mar 2007
It took them two days to get mine so be patient with them
  Reply With Quote
Old 24th July 2007, 03:05 PM   #7
diyAudio Member
 
Join Date: Oct 2005
I apologize for the late reply. I got married and was on my honeymoon for a week.

I now have the amplifier disassembled and I am starting to identify the parts that need to be replaced. It looks like I blew a couple power mosfets. I am having a hard time finding part numbers for each of the fets, but one of the fets near the blown one is a IRFZ46N. I will be uploading pictures of the board tonight after work for help identifying the blown parts.

It doesn't look like Soundstream is going to do anything for me. I have not gotten a response in over two weeks. I will try again but do not expect anything from them at this point.
  Reply With Quote
Old 25th July 2007, 04:16 AM   #8
diyAudio Member
 
Join Date: Oct 2005
Here are some images of the amplifier.

The first image is of the entire amplifier:

Click the image to open in full size.

The next image is zoomed into the area where the FET blew:

Click the image to open in full size.

The FET on the right is the one that blew. The next one to the left was cracked when I was removing the heatsink clip. The next one to the left (Q316) has been identified in an earlier post. I would like to replace all of the FETs/transistors all the way around the board.

Some of the TO-220 (I believe this is correct) packaged components have markings on them so I am starting to identify each one. I would appreciate if someone could identify each component or each bank of components so that I can verify that the correct components are purhased. Based on the part that blew, do you think anything else is damaged on the board? There is no visible damage to any other section of the board. I have started to clean the affected area with alcohol, but am not done at this point.

Please don't hesitate to give any suggestions or comments.

If you need any additional pictures please let me know and I can upload them.

Thank you for you help.
Lon
  Reply With Quote
Old 25th July 2007, 10:06 AM   #9
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
This is a very sad day for me. Soundstream is using the same manufacturer as power acoustic. :(

Move all of the output FETs from side to side (gently) while watching the point where the leg goes into the body of the transistor. IF the leg doesn't move with the body of the transistor, it's broken internally. If the broken leg is the first leg, it can cause the amp to fail as yours did. Do this for the rectifiers also.

It appears that there is one transistor missing in the audio section (near the fan). There are generally 8 FETs there. If one is missing, at least 4 will have to be replaced so you should just replace all 8 of them.

Check the audio FETs for shorted transistors (very low resistance or a dead short between legs 2 and 3).

There are 2 driver transistors on the driver board that fail regularly. They generally have bad solder connections and are a slightly different color due to high operating temps. I think they're Q124 and Q125. They're MPSA42s.

It's possible that the power supply driver transistor survived but you should check them out of the circuit. The (KT)A1023s are the ones most likely to be damaged. I'm not sure of the circuit board designation but the numbers may be Q311, Q313, Q411, Q413.

Also check all of the power supply gate resistors (connected to pin 1 of the FETs).

If the fan hasn't yet failed, it likely will soon. If it doesn't turn freely, makes noise or doesn't spin when the amp powers up, it's defective. It's a 40x10mm fan and they are readily available. A defective fan will cause the amp to fail.
  Reply With Quote
Old 25th July 2007, 10:21 AM   #10
diyAudio Member
 
Join Date: Dec 2004
Location: Jakarta
Send a message via Yahoo to darw82
usually when FET fail, the gate drive buffer will also fail, check your gate drive transistor. If no gate drive buffer is used, then the PWM controller may be fail.
  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
Soundstream PCA1500D Qwerky Scanlines Car Audio 22 7th August 2011 03:00 PM
Soundstream Reference 705 Schematic? djtsmith007 Car Audio 4 13th February 2009 05:11 PM
Schematic for a Soundstream 700SX kds9591 Car Audio 2 11th November 2008 03:40 AM
schematic for soundstream 700sx shallowfu Car Audio 24 9th July 2007 11:46 PM


New To Site? Need Help?

All times are GMT. The time now is 10:18 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