Question about Computers & Internet

1 Answer

How the SMPS is working in telecom? What are the functions of SMPS? How it is Converting AC to DC? What are the parts are there inside the SMPS and their function?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,571 Answers

Everything you wish to know about SMPS's here
http://en.wikipedia.org/wiki/Switched-mode_power_supply

Posted on Sep 01, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How the SMPS is working in telecom? What are the functions of SMPS? How it is Converting AC to DC? What are the parts are there inside the SMPS and their function?


smps involves ac to dc and dc-dc switching at high frequency because the type of a transformer in smps is a high frequency transformer and a current gain due to the ferrite application.to do a dc to dc switching you need a mosfet,smps ic e.g uc3845,dc capacitor and some passive components.

Aug 31, 2014 | Eaton Powerware® 9120 UPS System

1 Answer

What is the inverter board for plasma tv


Inverter board is one that supply high voltage to its back light CCFL lamps. There is an other inverter board SMPS [Swtch Mode Power Supply]. It too is known as inverter board, but meant for converting main AC voltage to various DC voltages, to be supplied to other boards inside the TV. Gopakumar Gopalan Google

Apr 26, 2014 | Televison & Video

1 Answer

Samsung 1080 picture glitching on model # HL61A750a1fx2c Versionre01


If it's all colors (Red, Blue, Green) doing the same thing at the same time, there are (unfortunately) multiple possibilities:

1) the AC to DC power supplies
2) the LED Driver Board
3) DLP driver, or DLP itself

The most likely problem is the DC-DC power supplies, which are known to have capacitors that go bad after several years of operation.

Due to this, there are many sources for either re-capacitor kits (DIY), or rebuilt power supplies with upgraded capacitors.

WARNING - Dangerous, and even lethal voltages are present inside your TV set. Do not attempt this unless you are trained in these kinds of repairs. Leave the TV unplugged for several hours (or preferably a full day) before attempting such.

DIAGNOSIS for bad capacitors: If you inspect the large capacitors on the power supply boards, and they are not totally FLAT across the top surface (if bulged at all), then you need a new power supply or new cap's. Likewise, if there is any leakage from the capacitors (usually a light-yellowish crusty appearing substance), they are BAD.

Sub-power supply:
BP96-01726B ASSY PCB P-SMPS Aquamarin,LED DLP TV,DC2

Main power supply:
BP44-01001A SMPS-DLP TV PN082DPS-VF(A),AC/DC,90V-132

A quick Google search for these part number (BP96-01726B & BP44-01001A) will reveal many sources, and pictures to verify it's what your set has.

1_12_2013_7_27_32_pm.jpg1_12_2013_7_27_48_pm.jpg

Jan 12, 2013 | Samsung HL61A750A 61" HDTV

1 Answer

Problem with HP 8510q laptop charging. Charging not working. Laptop working only that time when i have power in battery. Charging light not show. I try other charger but same problem. Is it inside some...


Inside? Yes. (If 'charger' is good)
Fuse?
No

Diagnostic flowchart:

A) AC adapter (Charger), has to be KNOWN to be good, before going on.
Used on a working laptop to see, or multimeter is used to check Voltage (DC)

The plug end that goes to the laptop, from the AC adapter, has a Center Hole, and a cylindrical outside metal shell.

The Function knob is set to DC Voltage. If just a symbol, the symbol is a dotted line over a solid line.
If more than one DC Voltage scale, the Function knob is set to the 0-50 Volt DC scale.

The Positive (Red) probe lead of the multimeter goes to the Center Hole, and the Negative (Black) probe lead of the multimeter, goes to the cylindrical outside metal shell.

You should be reading 19 Volts DC.

Also have an assistant gently wiggle the cable FROM AC adapter TO laptop, and the power cable TO AC adapter.
If there is a fluctuation on the reading, there is a broken wire, or wires, in one of those cables.

B) Check the DC Power Jack.
This is the jack on the laptop (DC_IN) that the AC adapter plugs into.

Has a Center Pin, and an inner cylindrical metal shell.
Battery removed, use an eraser on the end of a No.2 pencil, and see if you can GENTLY wiggle the Center Pin around.

ANY perceptible movement of the CENTER PIN, means replacing the DC Power Jack,
(By the way, is it an 8510p, or 8510w?)

http://www.alldcjacks.com/en/ppj052-laptop-dc-power-jack.html

Any movement of the rest of the DC Power Jack (Body), means replacing it; or may just mean the solder joints are cracked, and can be re-soldered.

C) AC adapter and DC Power Jack checks out?
Problem may be with Power MOSFET's on the motherboard, and associated MLCC's.

(Multi-Layer Ceramic Capacitor, and they are SMD/SMT just like the Power MOSFET's.
Surface Mount Device/ Surface Mount Technology)

Using HP pavilion dv6000 series, and Pavilion dv9000 series Notebook PC's, for an example,

http://mayohardware.blogspot.com/2010/04/important-parts-on-dv6000-and-dv9000.html

Or, it could be worse,

http://koti.kapsi.fi/jpa/stuff/pix/travelmate_6292/

Regards,
joecoolvette

Dec 23, 2012 | HP Compaq 8510p Notebook

1 Answer

What is the functions of invertor and lvds decorder inflat screen tv


sohan472004, An "INVERTER CIRCUIT" lights-up the thin "cold-cathode-fluorescent-lamps" inside lcd monitors by taking a low-voltage dc voltage (10 to 20 volts dc) and converting it to a high frequency 30khz to 100khz ac voltage (500 to 1100 vac) The same principle of operation is used to light-up those new style, curlieQ,energy-efficient,screw-in CFL light bulbs. Only their tiny "electronic-ballast" circuit is called a "CONVERTER" circuit.
AC to AC Hope this helps. 12fixlouie

Aug 10, 2010 | Gateway FPD 1730 17" Flat Panel LCD...

1 Answer

What is the power input voltage required to operate the phonic 1805x audio mixer? is this an AC, or DC input? unit missing power supply and needs to be bench tested for possible future use. no manual...


i have seen the manual. most mixers use ac mains supply with smps inside with +48V for phantom and ur mixer is one of those. u will see a three pin mains connector at the back. but phonic made these mixers for different countries. for us/canada 110~120Vac/60Hz - for uk/australia  230~240Vac/50Hz, europe/ asia 220~230Vac/50Hz.
Look for these or a voltage selector near the power input terminal. if u do not find any of these one sure way of finding which mains supply u should use is to open the case and look at the biggest rectifier filter capacitor on the smps board. 110~120V supply will have capacitors working voltage around 250Vdc and for the others around 400Vdc working voltage. (eg 1000uF, 250V or 1000uF, 400V)
so depending on the DC working voltage of the filter capacitor and country u either step up or step down the mains supply. 
18Vac supply will never work.!
the rated mains voltage sometimes are printed on the smps board itself. Hope this helps. 

Mar 13, 2010 | Electronics - Others

1 Answer

700p powers up for seconds then shuts off every time i try to turn it on


HI,

7OOP SMPS POWERS UP FO SECONDS THEN SHUTS FOR EVERY TIME.......

SMPS (SWICTH MODE POWER SUPPLY) HAS TWO SECTION IN IT
ONE IS AC SECTION AND OTHER IS DC SECTION WHICH IS SUPPLIED TO MOTHERBOARD,WHEN SMPS IS TURN ON ITS STOPS ALL OF SUDDEN,ITS A PROBLEM OF AC SECTION (PRIMARY SECTION) BECAUSE OF BAD AC 3 NOS TRANSISTORS IN AC SECTION) REPLACE SMPS OR GIVE IT TO COMPUTER CHIP LEVEL TECHNICIAN.

TNKS

RABBANEES

Nov 04, 2009 | Sylvania Computers & Internet

1 Answer

Which can i conect the LED on the motherboar


As soon as power is switched on, mains via the UPS, the LED glows indicating that the MB is ready for action, plus an indication that the SMPS, internal power supply, responsible for converting the AC to DC(12V, 5 V & 3.3 V, both(+ve & -ve), IS working for the MB(3.3V supply to the MB) & the MB has successfully passed POST(only MB), ready for action.
I hope this is your query, else clarify the problem you are facing by posting it as a comment and I'll modify(try) the soln...........sodeep

Oct 26, 2009 | HP (D7580-60003) Motherboard

1 Answer

Would like to get schematics on dc power for cellphone tower's. My job just placed me in another dept. of the company,an I have never done cellphone tower's before,they are telling me I an changing out...


Telecom uses a lot of 48V DC power. It was chosen a long time ago because the voltage is high enough to drive signals several miles away, it's safer than AC, and it's also very easy to work with for battery backup purposes eliminating the need for inverters.

Do some searches on 48V telecom and you'll find plenty of info.

Sep 17, 2009 | Computers & Internet

2 Answers

I need a 5kW DC generator with -48v output.


I have 5kW generators that produce -48V DC. The problem is that unless your generator is designed to produce -48V DC it would be difficult to retrofit an existing AC voltage output with a DC output.

Nov 25, 2008 | Kipor Electrical Supplies

Not finding what you are looking for?
Computers & Internet Logo

Related Topics:

1,310 people viewed this question

Ask a Question

Usually answered in minutes!

Top Computers & Internet Experts

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

kakima

Level 3 Expert

102366 Answers

David Payne
David Payne

Level 3 Expert

14161 Answers

Are you a Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...