Power Supply Board




Sharp LC 32LE450U Power Supply Board 9KT08PE081L5PW 40 E081L5 P
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LG LED LCD TV POWER SUPPLY BOARD PART EAY62851301 60LA6230 LA7410 LN6540 LN5710
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NEW EAY62811001 POWER SUPPLY BOARD FOR LG LED TV 55LA6620 LA6910 LA7400 LA8600
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ETX2MM813MSM PANASONIC PLASMA TV POWER SUPPLY BOARD PCB TH P65S20A SPARE PART
ETX2MM813MSM PANASONIC PLASMA TV POWER SUPPLY BOARD PCB TH P65S20A SPARE PART
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ETX2MM812MDS PANASONIC PLASMA TV POWER SUPPLY BOARD PCB PART TH P58VT20A
ETX2MM812MDS PANASONIC PLASMA TV POWER SUPPLY BOARD PCB PART TH P58VT20A
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LG LCD LED TV POWER SUPPLY BOARD SMPS SPARE PART EAY60803203 FOR 42LX6500
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Samsung BN44 00279A PLASMA TV Power Supply BOARD PS58B850 PART
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SAMSUNG BN44 00526A LED TV POWER SUPPLY BOARD FOR UA60ES8000MXXY
SAMSUNG BN44 00526A LED TV POWER SUPPLY BOARD FOR UA60ES8000MXXY
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Main board Power Supply for Samsung LN46B540 TV 46 Television Works Perfectly
Main board Power Supply for Samsung LN46B540 TV 46 Television Works Perfectly
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ETX2MM747MFF PANASONIC PLASMA TV POWER SUPPLY BOARD PCB SPARE PART TH P42G10A
ETX2MM747MFF PANASONIC PLASMA TV POWER SUPPLY BOARD PCB SPARE PART TH P42G10A
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Insignia Power Supply Board NS 50L440NA14 AY158P 4HF03 890
Insignia Power Supply Board NS 50L440NA14 AY158P 4HF03 890
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ETXMM563MDK PANASONIC PLASMA TV POWER SUPPLY BOARD PCB TH 42PV500A SPARE PART
ETXMM563MDK PANASONIC PLASMA TV POWER SUPPLY BOARD PCB TH 42PV500A SPARE PART
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Zitrades MB102 Breadboard Power Supply Module 3.3V/5V For Arduino Board Solderless Breadboard Zitrades MB102 Breadboard Power Supply Module 3.3V/5V For Arduino Board Solderless Breadboard
Sale Price: $6.99

Package Content : 1 x Breadboard Power Supply Module 1 x ZITRADES glass cleaning cloth

AGPtek® NEW 10 Isolated Output 9V 12V 18V Guitar Effect Pedal Power Supply AGPtek® NEW 10 Isolated Output 9V 12V 18V Guitar Effect Pedal Power Supply
Sale Price: $36.59

Caline CP-05 10 Isolated Output 9V 12V 18V Guitar Effect Pedals Power Supply. PART NAMES AND FUNCTIONS 1.Switch for LED lights:Turn the switch towards those LED lights,normally all lights would go on after the power is connected...

LG OEM Original Part: EAY62609701 TV Power Supply Board SMPS AC/DC LG OEM Original Part: EAY62609701 TV Power Supply Board SMPS AC/DC
Used From: $75.99

Power Supply Board

Gator Pedal Board Power Supply (G-BUS-8-US) Gator Pedal Board Power Supply (G-BUS-8-US)
List Price: $149.99
Sale Price: Too low to display

1700 Milliamp Regulated 9V & 18V Multi-Output DC Power Source for Pedals

MB-102 MB102 Solderless Breadboard Power Supply Module Jumper cable Kits for Arduino Project MB-102 MB102 Solderless Breadboard Power Supply Module Jumper cable Kits for Arduino Project
Sale Price: $6.01

MB-102 MB102 Solderless Breadboard with 3.3v / 5V Power Supply Module and 65 pcs mixed Jumper cable Kits

unihandbag Industrial Power Switching 5V 1A Built-inPower Supply Board Module Output rippl unihandbag Industrial Power Switching 5V 1A Built-inPower Supply Board Module Output rippl
Sale Price: $3.84

Description 5V 1A Built-in Industrial Power Switching Power Supply Board Module Description: Features: With mounting hole, with input and output EMI filter circuit has a temperature protection and short circuit protection, AC85 ~ 265V wide input voltage DC5V voltage output, compact, full-featured...

UpBright® NEW AC / DC Adapter For SPORTCRAFT D9300 Plug In Class 2 Transformer Dart Board Power Supply Cord Cable PS Wall Home Charger Mains PSU UpBright® NEW AC / DC Adapter For SPORTCRAFT D9300 Plug In Class 2 Transformer Dart Board Power Supply Cord Cable PS Wall Home Charger Mains PSU
Sale Price: $17.99

UpBright® NEW AC / DC Adapter For SPORTCRAFT D9300 Plug In Class 2 Transformer Dart Board Power Supply Cord Cable PS Wall Home Charger Mains PSU CECCCROHS 100-240

New Insignia 56.04250.G21 NS-L42Q120-10A TV Power Supply Board New Insignia 56.04250.G21 NS-L42Q120-10A TV Power Supply Board
Sale Price: $34.95

New Insignia 56.04250.G21 NS-L42Q120-10A TV Power Supply Board

SMAKN Mini Dc-dc Buck Converter Step Down Module Power Supply 4v-40v to 1.5V-35V SMAKN Mini Dc-dc Buck Converter Step Down Module Power Supply 4v-40v to 1.5V-35V
Sale Price: $7.22

lm2596 ultra-compact DC-DC buck regulator adjustable power converter module Input: DC 4V to 40V (input voltage must be greater than the output voltage is high to 1.5v or more.) Output: DC 1.5V to 35V voltage is continuously adjustable, high efficiency, maximum output current of 3A...

Power Supply Board
Power Supply Board

Repair LCD Power Supply The Easy Way

Troubleshooting LCD monitor power supply pack is easier than the crt monitor power supply. It is small and compact and usually has only one output which is 12 volt and range from 2 ampere to over 4 ampere. Some designed have 18 and 24 volts also. Nowadays most LCD power supplies are build into the main board such as the Dell E151FP LCD Monitor while the older type were separated as power pack module.

The power pack module type is easy to diagnose because you can replace another working unit just to make sure is the power pack that giving problem. You may also use an external dc power supply to power up the LCD to confirm if the power pack is faulty. If you do not have the external dc power supply, you can always use this method to isolate the problem especially the symptoms are no power, low power and power blink. Using the rear light bulb (12 volt) from a car and connect it to the power pack output jack. If it light brightly then the power pack is okay. If it blink or dim the power pack have problem. Why have to use this method to test it? Because, if there are components shorted or leaky at the LCD main board, it will affect the power supply performance.

From experienced, most of the LCD power supply problems whether in the power pack or built into main board were due to the failure of electrolytic capacitors (most probably due to heat) in the primary and secondary section. Most of the capacitors have a high ESR which causes the power supply to produce low output, blink or no power at all. Typical value electrolytic capacitors in the primary side are 47 and 100 micro farad 50 Volt and the secondary sides are 1000 to 2200 micro farad 25 volt. Sometimes you can see the capacitor top casing became bulge and the sleeve that covered the capacitor casing turned into darker color like brownish.

The power section in some of the LCD screen are still using the UC3842 pulse width modulation (pwm) ic. This type of ic is quite easy to find in the market compare to some power ic which is very difficult to get. Samsung 153V LCD monitor is using the TOP247F power ic which is quite easy to troubleshoot if power fail in this model. Some power pack that came in only have minor burnt and after cleaning it and replaced the fuse, it will work as good as the new one.

Troubleshooting LCD power supply is not that difficult provided if you know how a power supply work. If you are unsure of how to troubleshoot power supply, I urge you to read all my power supply articles at the power supply page. I will continue to post more power supplies articles at that page and hope you could drop by more often to check out my website.

About the Author

Find out more at the links below. You will be very surprised to discover that LCD and Electronic Component Repairs can make thousands of dollars even for a novice. You can find out the repairing secrets.

Find out How to Repair Any LCD Monitor - It is a breeze!

Learn about Secrets of Electronic Repairs.