MS-2125 "Disaster" Help !!!!

Post by **joerg** » Wed Jul 07, 2010 1:35 pm

When looking thru my stash i found a second parts board u can have for 20eur shipped if u want to!

Greetz
Joerg

Here is a picture of the board!

marko · Post by **marko** » Wed Jul 07, 2010 9:22 pm

what's up with that board joerg? (apart from parts missing

)

Post by **joerg** » Wed Jul 07, 2010 10:21 pm

marko wrote:what's up with that board joerg? (apart from parts missing )

I don´t know but i remember it didn´t work when i got it.

Fenice · Post by **Fenice** » Wed Jul 07, 2010 10:38 pm

Hy !!

PM sent to U !

Thank you

KUB3 · Post by **KUB3** » Thu Jul 08, 2010 12:20 pm

This is an amazingly helpful place

Welcome too

Fenice · Post by **Fenice** » Thu Jul 08, 2010 11:52 pm

Yeah, that's right !

I found here kind persons and a lot of help !!!

Post by **joerg** » Fri Jul 09, 2010 12:46 pm

Package shipped today

PM sent with tracking number!

valeks1 · Post by **valeks1** » Fri Jul 09, 2010 6:47 pm

Check voltage across emitter resistors on both channels.

Fenice · Post by **Fenice** » Sun Jul 11, 2010 1:39 am

Excuse me.....

what resistors ?

UPDATE :

I placed two 100 ohm resistors at place of thermal res and replaced SG2525 IC on left channel :

Now both channel turns on but leds on board in the left channel are really less bright than others.....an both channel clip leds are on...
Green power led now is on !

Help !!!!!

Fenice · Post by **Fenice** » Sun Jul 11, 2010 1:40 am

To Joerg

Thank U very much !

Fenice · Post by **Fenice** » Mon Jul 12, 2010 10:45 pm

To Valex1 :

You said

"Check voltage across emitter resistors on both channels."

Please.....can you tell me which resistors ?

Thank U very much !

Fenice · Post by **Fenice** » Thu Jul 15, 2010 11:56 pm

Hy !!!!

UPDATE :

With fuses F3 - F4 - F5 - F6 OUT amp eat 1,5A and clip led are both ON

With fuses F5 and F6 IN :

amp eat 1,7A, related clip led off !!! the channel seems work perfect !!
...but power consuption increase fast...after 1 minute the current became 2 ampere...and mosfets, and Toshibas too, start became hot ! Is it normal ?

With fuses F3 and F4 IN :

amp eat 5 Ampere !!!!!!!!, related clip led off !!!
the mosfets became really hot immediatly !!!
the problem is after fuses !!!!!! may be a short ???

DC offset at output is about 0,006 V

Hope this information can tell you something !!!!!

UFF !!!!

oldschoolfan · Post by **oldschoolfan** » Fri Jul 16, 2010 8:04 am

Fenice, I would like to buy those transformers from the parts board if you don't need them.

Fenice · Post by **Fenice** » Sun Jul 18, 2010 10:44 pm

Hy !!

I don't sell any piece til my amp will be full functionally ...........

When this 2125 will sound again I can send you transformers..
hope mine are good !

oldschoolfan · Post by **oldschoolfan** » Mon Jul 19, 2010 6:52 am

If you don't need them, that would be great. Thank you.

Fenice · Post by **Fenice** » Wed Jul 21, 2010 7:04 am

Hy !!!

Another questions.......

Can I use 35V railcaps instead of 40V railcaps ????

Thanks to everyone !

marko · Post by **marko** » Wed Jul 21, 2010 7:42 am

i would say no..