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Old Nov 18, 2014, 02:33 AM
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davidmc36's Avatar
Canada, ON, Ottawa
Joined Oct 2010
3,687 Posts
The SMD Codebook seems to indicate "CJ" is a zener diode.

http://www.marsport.org.uk/smd/mainframe.htm

But I don't seem to see a MMBZ4683 with five pins.
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Old Nov 18, 2014, 04:58 PM
Registered User
Australia, NSW, Sydney
Joined Sep 2011
5 Posts
I found a circuit diagram that could be of use.
Please see attached pdf
I you are able to source the component please let me know.
Possible part No. LP3985IM5X-3.3
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Last edited by szakacs; Nov 18, 2014 at 05:14 PM.
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Old Nov 18, 2014, 08:31 PM
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United States, CA, Redondo Beach
Joined Jun 2008
11 Posts
Quote:
Originally Posted by davidmc36 View Post
The SMD Codebook seems to indicate "CJ" is a zener diode.

http://www.marsport.org.uk/smd/mainframe.htm

But I don't seem to see a MMBZ4683 with five pins.
Thanks Dave for providing the SMD Codebook. I perused the content and searched for two terms, CJ for the base and SOT23-5 for the packaging and a number of components fell out. They were all voltage regulators and primarily the Low-Dropout (LDO) variety. Now I need to figure out the voltage since the components range from 1.5V to 5V.

Quote:
Originally Posted by szakacs View Post
I found a circuit diagram that could be of use.
Please see attached pdf
I you are able to source the component please let me know.
Possible part No. LP3985IM5X-3.3
The schematic nailed it. Thanks Szakacs! The operational voltage of 3.3V will help me narrow down which LDO regulator I need to buy. The SMD Codebook will give some cross-references. Hopefully, this component will bring these two GPS modules back to life.
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Last edited by Whirligig; Nov 18, 2014 at 08:39 PM. Reason: Combine replies
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