Phoenix Gold XS6600 - 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 8th February 2012, 04:37 AM   #1
Dr Zeus is offline Dr Zeus  United States
diyAudio Member
 
Dr Zeus's Avatar
 
Join Date: Oct 2010
Default Phoenix Gold XS6600

This is a 6 channel amp where the right subwoofer channel blew, but the rest of the amp still worked before the repair. I found both IRF540 in the channel blown (Q613 & Q614), as well as the following:

Q609, Q610, Q611, Q612
Q605, Q606, Q603, Q602

R633, R634, R615, R624, All four 0.22ohm emitter resistors, and the 200 ohm resistor right next to the emitter resistors.

I cant get this amp to power up without the current limiting resistor. Q614 gets hot after about 30 seconds of limiting current. For the first few seconds, theres DC voltage on the infected channel's speaker terminals.

Theres larger than average voltage across emitters of Q614 ~0.014
__________________
| Fluke 10 | Ramsey BS-601 | Topward 8102 | RS MiniAmp | Pyramid PS-15KX | DieHard |Big A$$ Resitor |

Last edited by Dr Zeus; 8th February 2012 at 04:39 AM.
  Reply With Quote
Old 8th February 2012, 08:02 AM   #2
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
If the outputs are out of circuit in the affected channel the amp should power up without drawing excessive current. I own one of these that came to me much the same condition as yours.
To simplify my efforts I just gutted both bass channels and then realigned the bias's in each channel after it was able to power up without issues.
The bias control is not connected to the outputs like most Mosfet amps its part of the input diff pairs and I always found those transistors badly damaged on this series of amp when a channel failure had occurred.

My experience with these XS amps is that when they fail like yours has there are damaged components from input to output, and only on rare instances was it possible to get these repaired by simply replacing outputs and gate drivers.
Also any excessive DC on the speaker terminals above 10 to 15 mvdc is a indicator that the input pair are damaged. There are only MPSA-06 and MPSA-56 and a couple 2SC2389 < input diff pair> transistors, but you should also pay close attention to the 1n4148 and associated zeners in the heart of the circuitry. They tend to be way out of spec also after such a hard failure.

Zeners are ; D607 and D608 and they are 15 volt 1N5245B. Zeners D605 and D606 are 6.0 volt 1N5233B. Q604 is the bias control transistor and it gets it -22 volts and bias connection from the Lm339 IC back in the 12 volt side, and Q600 is sink mounted and it is supplied +34 volts from the bass power supply to Q602 and Q603, and Q605 and Q606. This is also the mute circuit for each channel.

PG made this amp very economical to repair cost wise, but in 95% of the failures the whole channel needs to replaced to get like new functionality. As I said I have one right here at my feet in fact under my bench, and it was much like yours when I got it. I suggest you pull all the outputs out of the sub channels, then the amp will turn on without using a current limiter in the supply side.
Resistors are 2% as I recall 1/8 watt except on the output. If you can't read then I can ID them for you. Output rails should be +&-28 volts DC and the front end gets +34 and -22 across that circuitry, all from the sub power supply section, the other four channels are on a separate power supply....Let me know what else you need to know, I will gladly get the info for you....
  Reply With Quote
Old 10th February 2012, 12:06 PM   #3
Dr Zeus is offline Dr Zeus  United States
diyAudio Member
 
Dr Zeus's Avatar
 
Join Date: Oct 2010
1moreamp,

I checked through all those components and was not able to locate any more defects. Do you happen to have any recomendations for voltage measurements?

I removed the outputs in the defective sub channel; the amp will power and play on all other 5 channels (Even the 'other' sub channel).
__________________
| Fluke 10 | Ramsey BS-601 | Topward 8102 | RS MiniAmp | Pyramid PS-15KX | DieHard |Big A$$ Resitor |
  Reply With Quote
Old 10th February 2012, 02:56 PM   #4
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
I will be back online this evening. We can talk more then.
  Reply With Quote
Old 11th February 2012, 11:01 PM   #5
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
you have a PM
  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
Rebirth of the Phoenix PHEONIX Solid State 146 15th May 2011 06:39 AM
Anyone in Phoenix, AZ? Lewis Moon Swap Meet 0 15th November 2009 07:06 PM
New Guy In Phoenix Mindcrime Introductions 1 19th April 2007 05:16 PM
Phoenix questions ¿GotJazz? Multi-Way 26 29th August 2004 04:16 PM
Linkwitz Phoenix Oz_Audio Multi-Way 3 28th June 2002 07:27 AM


New To Site? Need Help?

All times are GMT. The time now is 04:23 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