Zener Diode

[lukeaudio]

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

[sintech]

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

[lukeaudio]

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

[kilmister]

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

[sintech]

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.

[lukeaudio]

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

[sintech]

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

[sintech]

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

[sintech]

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

[walrus]

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

[sintech]

Like :-)

[lukeaudio]

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

[walrus]

And the problem was........?? 

[lukeaudio]

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