I have a CD player that is dead. I found a zener diode surface mount diode. The part number is UDZ27B. It is a very small part. I measured across it and it measured 3 ohms. I figured it could just be a part in parallel, so I removed it and tested it out of circuit. It still measures 3 ohms both ways. So does this mean I found the bad part. I have NEVER seen these fail before.
-
Last edited by tech2014; 09-27-2014, 08:28 PM. -
Re: Surface Mount Diodes
Yes it's bad and diodes often do fail shorted. -
Re: Surface Mount Diodes
It's possible that it's bad.
Are you using the diode function on your DMM?
You should read low resistance in one direction and high resistance in the other direction, getting matching resistance in both direction would indicate that it is bad.
Are there other zener diodes like the one you found bad that you could do a reference measurement?Comment
-
Re: Surface Mount Diodes
I measured a similar part and it measured normal (low one way, high the other)
I did use the diode test on my fluke.Comment
-
Re: Surface Mount Diodes
Does anyone know where I can order these? Can't find them at mouser or digikey.Comment
-
Re: Surface Mount Diodes
I believe this might be a suitable replacement.
http://www.digikey.com/product-detai...BCT-ND/2615748Comment
-
Re: Surface Mount Diodes
Sorry I gave the wrong part number. The actual part number is 224492700R2, I gave the part description.Comment
-
Re: Surface Mount Diodes
still the same,
It can either be UDZ27B or UDZS27B.Comment
-
Re: Surface Mount Diodes
yes but the part I need is for -27vComment
-
-
-
TE Circuit Protection offers the widest selection of surface-mount fuses available for addressing a broad range of overcurrent protection applications. Helping to prevent costly damage and promote a safe environment for electronic and electrical equipment, our single-use chip fuses provide performance stability to support applications with current ratings from .5A up to 20A.
TE Circuit Protection also offers the telecom FT600 fuse for telecommunications applications. This telecom fuse helps comply with North American overcurrent protection requirements, including Telcordia, GR-1089,...10-07-2024, 06:07 AM -
This specification for the Microsoft Surface Book Surface Book 3 + Surface Dock 2 Hybrid (2-in-1) can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Surface Book 3 + Surface Dock 2 boardview and Surface Book 3 + Surface Dock 2 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note...09-06-2024, 08:10 PM
-
This specification for the Microsoft Surface Book Surface Book 3 + Surface Dock Hybrid (2-in-1) can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Surface Book 3 + Surface Dock boardview and Surface Book 3 + Surface Dock schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that...09-06-2024, 08:10 PM
-
This specification for the Microsoft Surface Book Surface Book 3 + Surface Dock Hybrid (2-in-1) can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Surface Book 3 + Surface Dock boardview and Surface Book 3 + Surface Dock schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that...09-06-2024, 08:10 PM
-
This specification for the Microsoft Surface Book Surface Book 3 + Surface Dock Hybrid (2-in-1) can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Surface Book 3 + Surface Dock boardview and Surface Book 3 + Surface Dock schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that...09-06-2024, 08:10 PM
Comment