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Schematics for Electro-Voice Zlx12-P
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Mojo A Guy View Drop Down
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Joined: 09 July 2019
Location: UK
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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mojo A Guy Quote  Post ReplyReply Direct Link To This Post Posted: 11 September 2023 at 11:10am
I attempted to repair the PSU burn out issue. Replaced FET, resistors, 3845 chip, With no FET fitted I see 46 KHz pulses on gate pin. However, when I fit the FET and power up. FET blows again. I can’t find any obvious shorts on secondary side of PSU +U, -U, +/-15v, 3,3v. I’m a struggling. 

Any suggestions?

P.S I have schematics for PSU, input and display pcb. 

Can anyone send me schematic for power amp section please.

davehughes1959@gmail.com.

Thanks in advance 
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evizioli View Drop Down
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Joined: 12 September 2023
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Points: 2 		Post Options Post Options   Thanks (0) Thanks(0)   Quote evizioli Quote  Post ReplyReply Direct Link To This Post Posted: 12 September 2023 at 3:54pm
Originally posted by clavo1542 clavo1542 wrote:

So my wonderful friend decided to run a live speaker cable into the input of my one year old ZLX-12PAngry

 
All I get is a foul smell and a loud low-mid frequency humming noise and the screen wont light up anymore.  So I need all the help I can get please.  Is the amp complete toast?  Is it a matter of replacing a few components?  There is no evidence of any damage whatsoever (just the smell, but nothing looks burnt, melted, or damaged.  I don't know how to troubleshoot.  But I do know how to read a schematic and solder. 
 
I NEED SOME GUIDANCE PLEASE!!
 
THANK YOU,
 
DAVID

hi!
exacly the same problem as yours
can you tell me if you solved it and how? 
thanks so much


Edited by evizioli - 12 September 2023 at 3:57pm
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Mojo A Guy View Drop Down
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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mojo A Guy Quote  Post ReplyReply Direct Link To This Post Posted: 18 September 2023 at 9:09pm
Do you have the schematic for the power amp section you can send to me?

davehughes1959@gmail.com 

Thanks in advance. 
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evizioli View Drop Down
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Joined: 12 September 2023
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Points: 2 		Post Options Post Options   Thanks (0) Thanks(0)   Quote evizioli Quote  Post ReplyReply Direct Link To This Post Posted: 19 September 2023 at 2:58pm
Sorry Dave, I don’t have schematics other than the ones shared above
I’ll try to test the amp section borrowing a a good dsp  section from a friend
Regards
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