diode delemma

Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=134264
Printed Date: May 15, 2024 at 3:12 PM

Topic: diode delemma

Posted By: gganey
Subject: diode delemma
Date Posted: May 23, 2013 at 3:08 PM

I am trying to repair the clock in my 2000 Honda CRV. The Internet provided a link for the solution and I tried it. Well it took me 3 tries before I got the soldering well enough for the clock to work but once I reinstalled the clock it began to smoke and emit a lousy odor. After opening the clock up again I found that the item in question is a diode, the circuit board has the diode symbol next to it. There is an identical diode beside the fried one as well. Beside both of them inscribed on the board is “S154” and on the diodes is printed “14 95”. I’ve tried to google both S154 and 1495 with and without the word diode and am getting nowhere. Can anyone tell me what I am doing wrong? I am including 2 photos showing what I am dealing with. Thanks for any insight.

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Glenn

Replies:

Posted By: tonanzith
Date Posted: May 23, 2013 at 9:48 PM

I believe that's a sod523 varactor diode.

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Gary Sather

Posted By: tonanzith
Date Posted: May 23, 2013 at 9:54 PM

Possibly sod323

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Gary Sather

Posted By: oldspark
Date Posted: May 24, 2013 at 6:09 PM

If series diodes are frying there is probably some downstream fault - a shorted transistor or cap etc.

But "3 tries" could mean too much component heating and hence failure.

SMD tracks are less tolerant to soldering rework. Tracks can lift and under-component solder flows & hence shorts can be an issue. Multilayer PCBs are another issue but not in this case(?)