Phoenix Gold ms 2125 "Disaster" Help !!!! - 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 5th July 2010, 10:41 AM   #1
Fenice is offline Fenice  Italy
diyAudio Member
 
Join Date: Jul 2010
Location: Vittorio Veneto
Default Phoenix Gold ms 2125 "Disaster" Help !!!!

Hy, I'm a new member from Italy...

I have a glorious Phoenix Gold MS-2125 board rev C that had multiple damages...

I have replaced all power Mosfets of the right side...all imput caps....all rail caps, some resistors and diodes...

Yesterday I tried to power it...

AHHHHHH !!!!!!

Right side: the two internal leds is on
Left side : dead...

Green power led : off !!!!
Yellow led: ON !!
Red overloal led : off

Left clip red led : off
Right clip red led : ON !!!!



What can I do ?

I don't know from where to start !!!

Thank in advance to all !!!!
  Reply With Quote
Old 5th July 2010, 12:14 PM   #2
Fenice is offline Fenice  Italy
diyAudio Member
 
Join Date: Jul 2010
Location: Vittorio Veneto
..........other problem :

the two thermal resistors....MISSED !!!!

Someone have the code to buy replacement ??

Thank U again...
  Reply With Quote
Old 5th July 2010, 07:15 PM   #3
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
On the right channel look for Q222 and Q223 and replace them and the clip issue should be resolved , unless the channel has other issues. This is a common issue with these amps when they have been driven into overload clip abusively.

I do not have a spec for the thermal sensors as I have never had to replace any of them. PG/AAMP of Florida aka Stinger might be helpful with these as I know of no other source currently. For temporary operation you can try 100 or 1000 ohm resistors in place of the missing devices.
The Yellow LED being on indicates that the amp is in thermal overload due to the missing thermal sensors, and this will shutdown the amps operations until it is resolved somehow...

The leds in the channel that are blown open are also typical of a amp that has been abused. You have two options here.

1 replace the leds with exact replacements types or

2 replace the single led with two 1n4148 diodes

The LED is selected for its specific voltage drop and has the same Voltage drop as two 1n4148 diodes



Hope this helps some....Ciao

Last edited by 1moreamp; 5th July 2010 at 07:43 PM. Reason: channel leds opps...
  Reply With Quote
Old 6th July 2010, 07:23 AM   #4
Fenice is offline Fenice  Italy
diyAudio Member
 
Join Date: Jul 2010
Location: Vittorio Veneto


You are fantastic !!!

....and really kind !!

I'll try to do this actions...

I hope leds are not bad...I will test them with a battery !

And how about green power led off ??
  Reply With Quote
Old 6th July 2010, 07:51 AM   #5
Fenice is offline Fenice  Italy
diyAudio Member
 
Join Date: Jul 2010
Location: Vittorio Veneto
Q222 an Q223 are "2SA1038" and "2SC2389".........

Where can I find them ?????

Searched on internet but........nothing to do...
  Reply With Quote
Old 6th July 2010, 07:54 AM   #6
Fenice is offline Fenice  Italy
diyAudio Member
 
Join Date: Jul 2010
Location: Vittorio Veneto
Here the photos :


MS-2125 Disaster :: 2125 disaster picture by Fenice11 - Photobucket
  Reply With Quote
Old 6th July 2010, 05:18 PM   #7
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
Quote:
Originally Posted by Fenice View Post


You are fantastic !!!

....and really kind !!

I'll try to do this actions...

I hope leds are not bad...I will test them with a battery !

And how about green power led off ??

To battery test I use a lithium battery from a computer motherboard. It has the correct voltage and its edges will just connect on the bottom of the amp PC board.

The green led will not light up as long as the thermal sensors are missing. The thermal circuitry will shut down the amp and the green led...Ciao...
  Reply With Quote
Old 6th July 2010, 05:24 PM   #8
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
Quote:
Originally Posted by Fenice View Post
Q222 an Q223 are "2SA1038" and "2SC2389".........

Where can I find them ?????

Searched on internet but........nothing to do...

Octopart - Electronic Parts, Electronic Components, Datasheets

FindChips.com Search


Please try the above links for parts search. Those transistors are fairly routine so they should be out there. Many amp makers use them so they should be plentiful.....
  Reply With Quote
Old 6th July 2010, 05:32 PM   #9
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
Quote:
Originally Posted by Fenice View Post

I have a MS-2250 here in just as bad a shape. Seems people dump them after they fry them. PG still has boards for these last I heard. I am sure they want a pretty penny for them though...

Oh please check all the Fuse type resistors in the channels. They are green and grey body colored resistors. Mostly low values like 68 ohms and 50 ohms, and 22 ohms they open up on failures to prevent even worse damage. Please replace them with only fuse type resistors....Ciao...
  Reply With Quote
Old 7th July 2010, 06:40 AM   #10
Fenice is offline Fenice  Italy
diyAudio Member
 
Join Date: Jul 2010
Location: Vittorio Veneto
I envy your knowledge and where you live too !



I'll try to search components....

Using a 100 ohm resistor in place of thermal res yellow led go off and

power green led light on !!!!!!!!!



....but amp "eat" a ton of current !!! (4-5 ampere)

Have tested all resistors on both channel and are all ok !

Leds are ok

Transistors seems to be ok.....

UFF !!!! so if all components ok...why right channel CLIP and left channel DEAD ?



This evening will make other tests....

WOW !! an 2250 !!!!

I hope you repair it !!!!

Thank U very much....
  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
Help me please x Phoenix Gold ms 2125 lokatos Car Audio 4 1st October 2010 06:48 PM
difference in PG MS-2125 and MPS-2500 damage Car Audio 8 15th December 2008 12:46 AM
PG MS-2125 component values toiletH20 Car Audio 6 22nd August 2008 07:46 AM
Gold plated female quick connect spade terminals (.110", .187") dholcombe Parts 1 29th January 2008 11:16 PM
"Gold" chipamp set finished. steenoe Chip Amps 29 19th April 2005 08:06 AM


New To Site? Need Help?

All times are GMT. The time now is 09:46 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