SSlmixed.com Forum

Tech discussion => 4K,6K,8K Series => Topic started by: lukeaudio on July 23, 2014, 03:46:31 AM

Title: Zener Diode
Post by: lukeaudio on July 23, 2014, 03:46:31 AM

hi guys, someone can tell me the reference of this Zener Diode on the 611, because I have a 611 card that is broken and doesn't work. I checked this diode, and its in  short circuit.....

thank
luke

Title: Re: Zener Diode
Post by: sintech on July 23, 2014, 09:16:22 AM

You need to state which card in the 611, this would be a big help.

Title: Re: Zener Diode
Post by: lukeaudio on July 23, 2014, 03:28:55 PM

hi synt thanks for your great contribution to this forum
you're right …I don’t know how its called this part of the card, but  I attached one picture

thank
luke

Title: Re: Zener Diode
Post by: kilmister on July 23, 2014, 04:21:26 PM

Sintec ment what card it is where you have faulty zener. At center section there's plenty of different kind of cards which are generally called by numbers ex. 13 (there's 4 of them) is master fader VCA card. Numbres are also printed in silk screen right side of 611 motherboard.

-Paavo

Title: Re: Zener Diode
Post by: sintech on July 23, 2014, 07:26:33 PM

These are the 611 motherboard bipolar power rail protection 24v Zeners.

So reading a short across one of these, most likely indicates a problem on one of the cards, if the 611 doesn't power, the associated pico fuse, will defo be out too.

Title: Re: Zener Diode
Post by: lukeaudio on July 23, 2014, 07:57:08 PM

thank sintech...... I change all the cards... and tried it on another channel and all work well ....I do not know what else to do

thank
luke

Title: Re: Zener Diode
Post by: sintech on July 24, 2014, 12:18:49 AM

In that case, you should change the 24v Zener and the fuse: F1/F2 if they're now open circuit.

Title: Re: Zener Diode
Post by: sintech on July 24, 2014, 12:29:49 AM

I'll look through the parts list tomorrow, any 24V zener will work, it's just making sure the rating isn't too small.

Title: Re: Zener Diode
Post by: sintech on July 24, 2014, 12:45:39 AM

Checking back on my email, the last time this part was needed here, got these, and pretty sure.. I got 9 spare :-))))

BZX85C24V X10 ZENER DIODE(1.3W) BZX85C24V

Title: Re: Zener Diode
Post by: walrus on July 24, 2014, 10:52:50 AM

Doing a Google search with evidence from the picture, the original is probably these....
http://www.ebay.com/itm/10pcs-Motorola-1N4749A-24V-1W-5-Zener-Diode-DO-35-NOS/321463729688

Title: Re: Zener Diode
Post by: sintech on July 24, 2014, 11:57:49 AM

Like :-)

Title: Re: Zener Diode
Post by: lukeaudio on July 25, 2014, 03:45:42 AM

thanks to all for the info....i already repaired it  8) 8) 8) 8)

Title: Re: Zener Diode
Post by: walrus on July 25, 2014, 11:37:09 AM

And the problem was........??  :)

Title: Re: Zener Diode
Post by: lukeaudio on July 25, 2014, 01:28:28 PM

1)  The afl switch(stereo channel) was inverter the blue  and the white wire ....I guess the previous owner tried to fix
2)  zener diode was wrong (because I did not have the correct number ...24 v )
3)  and obviously the fuse was broken   

 thank
luke