sony x-plod XM-1600GSD 1200W (protect mode) - 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 14th March 2010, 07:47 PM   #1
diyAudio Member
 
Join Date: Jul 2008
Location: Montreal
Send a message via Yahoo to scampo77
Default sony x-plod XM-1600GSD 1200W (protect mode)

i have checked all of the transistors that are bolted to the heatsink and they all seem to be fine

i have not pulled the rectifiers yet because im not sure if this could be the problem and also im not sure how to check these.

any suggestions?
  Reply With Quote
Old 14th March 2010, 07:49 PM   #2
Glowbug is offline Glowbug  United States
diyAudio Member
 
Glowbug's Avatar
 
Join Date: Feb 2006
Location: Hillsborough, NC/McLean, VA
Going into protect no matter what the impedance is?
__________________
Jim J.
  Reply With Quote
Old 14th March 2010, 07:54 PM   #3
diyAudio Member
 
Join Date: Jul 2008
Location: Montreal
Send a message via Yahoo to scampo77
sorry its going in to thermal not into protect. there are 4 LED lights power, over current, offset and thermal.

even with all of the FETs out its still does this.
  Reply With Quote
Old 14th March 2010, 08:06 PM   #4
diyAudio Member
 
Join Date: Jul 2008
Location: Montreal
Send a message via Yahoo to scampo77
im still new at this and i cant tell which FETs do which job but i have 6x SSP45N20A and with the diode test none of them have any shorts but all 6 test to .480. is this close enough or should i change them?

another thing i am seeing for the first time is when i am pulling the fets out (with no power to the amp) im getting a lot of sparking when my soldering iron touches on 2 of the legs. is there a way to get rid of this voltage or is it a big deal?
  Reply With Quote
Old 15th March 2010, 02:41 AM   #5
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
It's unlikely that you'll be able to find replacements for those outputs (45N20A). Most of these amps will only work with those transistors and many of the NOS 45N20As I've found wouldn't work properly. Reinstall them if they're not shorted.

The rail capacitors are remaining charged. Either wait until you read only a few volts across them or discharge them (preferably through a dummy load). Soldering the FETs in with charged caps could definitely blow them.

The 'outputs' will have a direct connection to the speaker terminals (assuming there is no speaker protection relay). The 'power supply transistors' will have a direct connection to the primary side of the power transformer and to the B+ terminal (when checking for continuity with your multimeter). The connection is typically to the center leg of the PS FET but on this amp, the connection is to the third leg.
  Reply With Quote
Old 15th March 2010, 11:45 AM   #6
diyAudio Member
 
Join Date: Jul 2008
Location: Montreal
Send a message via Yahoo to scampo77
do you have any advice why the thermal light keeps coming on?
  Reply With Quote
Old 15th March 2010, 11:51 AM   #7
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Post the DC voltage on all 14 pins of the LM339. Place the black meter probe on the amplifier's ground terminal. Place the red meter probe on the point where you need to measure the voltage.

LM339
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
  Reply With Quote
Old 16th March 2010, 12:12 AM   #8
diyAudio Member
 
Join Date: Jul 2008
Location: Montreal
Send a message via Yahoo to scampo77
is it normal not to ba able to get transistors to repair amps? if so which amps should i stay away from?
Attached Images
File Type: jpg protection.JPG (43.9 KB, 88 views)
  Reply With Quote
Old 16th March 2010, 02:20 AM   #9
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Some amplifiers only work properly with the original transistors. There may be other transistors that are drop-in replacements but finding them can be very time consuming and expensive. Sometimes, you can get substitute transistors to work but it requires a bit of re-design to get the amp to work properly. The amps that use the SSP45N20A are the hardest to find replacements for. For amps that used the 45N20A and have less than 70v rails, the IRF3415 is sometimes a good replacement. I used lots of them in the MTX 6500Ds. For amps like the Sony P5 amps, the MTX1000D, MTX81000D and some Xtant amps, finding replacements is more difficult and all that I've found required at least a bit of tweaking for them to work properly.

Confirm that pin 12 has 6v. It should be at 0v. If it's at 6v, look for open ground traces.
  Reply With Quote
Old 17th March 2010, 02:08 AM   #10
diyAudio Member
 
Join Date: Jul 2008
Location: Montreal
Send a message via Yahoo to scampo77
it was at 6v and i did find a open ground trace i bridged it and now the voltage at that pin is 0 but the light is still on.
  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
Kole KX1-5500D in protect mode. Shorted diode? barros57 Class D 2 13th February 2010 01:41 PM
Onkyo TX-SV444 goes into protect mode morgangdfp Solid State 2 28th January 2009 12:46 PM
Orion 2500D trouble shooting- protect mode Scanlines Car Audio 5 30th July 2008 10:59 PM
Help....PPI 2360 won't come out of protect mode ??? kombos Car Audio 11 11th July 2007 01:20 AM
onkyo amp txsv717 not working(protect mode) Tabatha Koger Parts 0 3rd February 2005 09:25 PM


New To Site? Need Help?

All times are GMT. The time now is 04:03 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