Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > General Electronics Technical Discussion
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 04-01-2021, 03:05 AM   #1
Askic
Senior Member
 
Join Date: Sep 2018
City & State: Korce
My Country: BIH
I'm a: Knowledge Seeker
Posts: 152
Default Need help to identify a component (diode?)

Hello guys,

can you please help my identify components with numbers 53 and 59? They could be a diodes?
This component 53 is connected in parallel between source and drain of a P Channel A2179 Mosfet.
I wonder what is their purpose here.

Thank you!
Attached Images
File Type: png component.png (82.1 KB, 61 views)
Askic is offline   Reply With Quote
Old 04-02-2021, 03:25 AM   #2
sam_sam_sam
Badcaps Veteran
 
Join Date: Jul 2011
City & State: Some times Sunny Jacksonville FL
My Country: USA
Line Voltage: 120 Volts 60 HZ
I'm a: Knowledge Seeker
Posts: 3,579
Default Re: Need help to identify a component (diode?)

This might help you

http://www.s-manuals.com/smd/53


Zener Diodes

http://www.s-manuals.com/pdf/datashe..._fairchild.pdf

Google search—> SMD diode “53”

https://html.alldatasheet.net/html-p...UPA2719GR.html

https://www.digchip.com/datasheets/p...A2719M-pdf.php

Someone else would have to answer this question for you

“ I wonder what is their purpose here. ”


I hope this helps you
__________________
9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *


These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
2 Hem Saw Computer Stack Board

All of these had CAPs POOF
All of the mosfet that are taken out by bad caps

Last edited by sam_sam_sam; 04-02-2021 at 03:56 AM..
sam_sam_sam is offline   Reply With Quote
Old 04-02-2021, 10:43 AM   #3
R_J
Badcaps Veteran
 
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 8,101
Default Re: Need help to identify a component (diode?)

The thumb nail picture is too small, there seems to be other markings (above the 59) on the devices? Since there are 3 in parallel I would almost suspect they are capacitors?
What is the board from? any numbers on the board? Can you tell how the circuit is used? is the mosfet just used as a switch?

Last edited by R_J; 04-02-2021 at 11:05 AM..
R_J is offline   Reply With Quote
Old 04-02-2021, 11:32 PM   #4
Askic
Senior Member
 
Join Date: Sep 2018
City & State: Korce
My Country: BIH
I'm a: Knowledge Seeker
Posts: 152
Default Re: Need help to identify a component (diode?)

Thank you sam sam sam.
R_J this is from Fujitsu H700 laptop board. I have no schematics, but I can guess that Mosfets are used for protection since thea are in close proximity of the batery. There is a current sensing resistor there.

Last edited by Askic; 04-02-2021 at 11:59 PM..
Askic is offline   Reply With Quote
Old 04-10-2021, 04:15 AM   #5
dicky96
Sun Seeker
 
dicky96's Avatar
 
Join Date: Mar 2017
City & State: Sunny Gran Canaria
My Country: Spain
Line Voltage: 220V 50Hz
I'm a: Professional Tech
Posts: 1,375
Default Re: Need help to identify a component (diode?)

It looks like a Tantalum capacitor to me too.
dicky96 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2022
Powered by vBulletin ®
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 04:29 PM.
Did you find this forum helpful?