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MS-2125 "Disaster" Help !!!!
Posted: Mon Jul 05, 2010 4:17 am
by Fenice
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 !!!!
Posted: Mon Jul 05, 2010 5:00 am
by ttocs
it would help alot if you can take pics of everything you have, the more detailed the better. We have some people here that can help but the more info you give the better.
welcome to the phorum....
Posted: Mon Jul 05, 2010 5:34 am
by Fenice
OK !!
How can I up the pics ?
Posted: Mon Jul 05, 2010 6:01 am
by ttocs
you will need to post them to a photo hosting site. Cardomain, photobucket, ect, there are a number for free then just cut/past the link.
Posted: Mon Jul 05, 2010 6:04 am
by Fenice
Thank You very much !!!!!!
U are really kind !
Posted: Mon Jul 05, 2010 6:07 am
by ttocs
Don't let me fool you I was just unable to sleep at all last night. (insert sleep smiley)
Posted: Mon Jul 05, 2010 6:12 am
by Fenice
Posted: Mon Jul 05, 2010 6:28 am
by Fenice
..........other problem :
the two thermal resistors....MISSED !!!!
Have you got the code to buy replacement ??
Thank U again...
Posted: Mon Jul 05, 2010 6:39 am
by ttocs
if they happen to be 10k thermistors I got ya covered, if not then we will start a search.
Posted: Mon Jul 05, 2010 6:49 am
by joerg
Fenice wrote:
the two thermal resistors....
Welcome to the forum!
I might have those parts! I could just take it out off one of the spareboards i have and sent them to you! I´ll post pics tonight!
They will ship out from austria.
Posted: Mon Jul 05, 2010 7:26 am
by marko
what was wrong with the amp before work was carried out? how many amps is the amp pulling on idle? looks like you have issue on the left side..
Posted: Mon Jul 05, 2010 10:42 am
by joerg
Are the parts marked in the picture below, the parts u´re looking for?
If so let me know and i´ll help ya out.
Posted: Mon Jul 05, 2010 11:26 pm
by Fenice
Yes....these are thermal resistors I need...
Can you sell them to me ?
Posted: Mon Jul 05, 2010 11:30 pm
by Fenice
To Marko :
Hy !
The amp came to me in desperate conditions from a person who sold me for 50 Eur....
All mosfets of right side burned....
Board ruined and minor damages.....
My dream is to reanimate it !
Posted: Mon Jul 05, 2010 11:55 pm
by Fenice
Posted: Tue Jul 06, 2010 1:29 am
by joerg
Fenice wrote:Yes....these are thermal resistors I need...
Can you sell them to me ?
I´ll take them out of the board and ship them to you!
Please PM me with your address.
Greetz
Joerg
Posted: Tue Jul 06, 2010 1:38 am
by Fenice
Message sent......
Thank You !
Posted: Tue Jul 06, 2010 4:09 pm
by jbob0124
That board looks like it got beat up pretty bad.
Posted: Tue Jul 06, 2010 10:43 pm
by Fenice
Posted: Wed Jul 07, 2010 12:29 am
by Fenice
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....
Posted: Wed Jul 07, 2010 7:33 am
by marko
if the boards been out then one of the outputs could be shorted to chassis, have you tried current draw with board out of sink?
Posted: Wed Jul 07, 2010 8:22 am
by Fenice
Yeah...board is on my table........
Posted: Wed Jul 07, 2010 8:26 am
by marko
something is shorted for it to be drawing high amps at idle, check all outputs again and psu fets..
Posted: Wed Jul 07, 2010 8:27 am
by Fenice
OK !
Could be rectifiers ? (SF302 and SF302N)
Thank U
Posted: Wed Jul 07, 2010 8:27 am
by Fenice
Information for everyone :
Thermal sensors are :
PTC 100 ohm
like this :
http://it.rs-online.com/web/search/sear ... R=496-2407
Hope this information could be useful foe someone....
