Question about LG L1951S-SN (Silver, Black) (Black, Silver) 19" LCD Monitor
The 68UF 450 is for the primay smps driving side, are you getting about 160vdc on that cap?
The PWM IC get the kick start DC voltage from the main bridge rectifier thorough a bunch of high resistance resistor to drop the 160vdc down to aboit 15vdc, once the PWM IC start working, one the winding will be the supplying the voltage to the IC to keep it running. If the DC output side detect short cirsuits (drawing too much current) it will go into shutdown, you need to find out if the inverter circuits has short circuits. The 5vdc and the 12~18vdc power supply will be running the minute you plug it in, you can solder in a 12v bulb at the DC output that feeds the inverter circuits (you can solder it directly on the DC filter caps for the 12~18 VDC filter caps of the inverter circuits). See application notes how this IC is used.
No blown MOSFET on the primay side?
Posted on Aug 23, 2010
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.
Posted on Jan 02, 2017
Tips for a great answer:
Oct 17, 2013 | Akai LCT3201AD 32 in. LCD Television
Jan 14, 2013 | Vizio SV471XVT 47 in. LCD TV
Basic LCD monitor troubleshooting guide:
Learn about bad caps: Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Nov 20, 2010 | LG Flatron L1951S-SN 19" LCD Flat Panel...
Sep 16, 2010 | LG Flatron L1951S 19" LCD Flat Panel...
Mar 30, 2010 | LG Flatron L1951S 19" LCD Flat Panel...
Jan 01, 2010 | LG Flatron L1951S-SN 19" LCD Flat Panel...
Jul 13, 2009 | LG Flatron L1951S-SN 19" LCD Flat Panel...
Nov 20, 2008 | LG Flatron L1951S-SN 19" LCD Flat Panel...
Oct 02, 2008 | Sceptre X20g-Naga III 20.1" LCD Monitor
206 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: