Thursday, February 18, 2010

Samsung LNT4065FX/XAA, Repaired

Went on a service call to a customers home with a Samsung LNT4065FX/XAA that was slow to power on and often would get pinkish/violet pixels and artifacts in the picture. Upon opening the back of the TV I immediately noticed two puffed and vented electrolytic capacitors on the SMPS board. I checked all the electrolytic capacitors on the SMPS board with my ESR/capacitance meter but only the two puffed and vented capacitors were bad. After replacing the electrolytic capacitors, both 2200uF @10V, locations CM852 and CM853 and reassembling the TV it turned on and worked perfectly.




Friday, February 12, 2010

Samsung Syncmaster 906BW, LS19MEWSFY/XAA, Repaired

Samsung Syncmaster 906BW, LS19MEWSFY/XAA LCD monitor came into the shop today with no picture(really it was that the back lights were not lighting). Upon opening the monitor and removing the SMPS/Inverter PCB, I noticed 2 puffed and vented electrolytic capacitors right away. I checked all the rest of the electrolytic capacitors in the SMPS with my ESR meter to make sure no others were bad and they all were within tolerance for both ESR and capacitance. I scanned the SMPS for bad solder connections and found none. Next I removed the 2 1000uF @10V electrolytic capacitors that were puffed at locations C109 and C110 and replaced them with 2 1000uF @25V electrolytic capacitors with a 125 degree Celsius temperature rating(not necessary to go up in temp. and voltage rating this much or at all but don't use anything less than the originals). After reassembling the monitor and turning the monitor on, it worked like new.










You may also be interested in our LCD TV Repair Guide. Click here to read more.



Friday, February 5, 2010

SMPS Info Page

Here is a cool PDF that has lot's of free information to help you understand the basic and most common SMPS topologies.



Click here to visit the website and start reading about SMPS.




Another Sceptre X32GV-Komodo, Repaired

Sceptre X32GV-Komodo

Symptom:

TV will play fine for maybe a day or two and then turning on one time it will display video poorly, picture has artifacts, a couple flickering areas of pixels and intermittent horizontal line/lines for a couple minutes to a half hour then TV will turn off with no standby/power light and can not be turned on until unplugging and the plugging back in. TV may work again for a day or two before it repeats the failure.

Repair:

Replaced bad electrolytic capacitors, 1uF(didn't record voltage), 470uF 10V and 220uF 35V on SMPS board. Locations C202, CS124, CS118 and CS206.


Check out LCD TV Case Histories and find a quick fix for your broken LCD TV.

Tuesday, February 2, 2010

Polaroid, FLM-1911, Repaired.

This one comes from Dave's TV in grants pass OR.

Symptom:

White screen and a few faint vertical lines on picture.

Repair:

Replaced bad electrolytic capacitors, 470uF @25V. Locations C806, C807, and C808 on the SMPS board.

Thanks for the great tip Dave. Get more great tips from Dave by clicking on the link below.

Dave's TV Youtube Page

Also check out LCD TV Repair Case Studies, for many more LCD TV quick fixes.

Sceptre X32GV-Komodo, Repaired

Enjoy another repair from Preher-Tech.


X32GV-Komodo-

Symptom:

No power, sometimes standby/power LED will blink red.

Repair:

Replaced bad electrolytic capacitors, 470uF 10V and 220uF 35V on SMPS board. Locations CS118 and CS206.

Check out LCD TV Repair Case Histories.

LG RM-32LZ50, Repaired

Another repair from Preher-Tech

LG RM-32LZ50

Symptom:

No picture but has sound sound.

Repair:

Remove R60 SMD resistor on
Inverter PCB.

Check out LCD TV Repair Case Histories.

LG RM-30LZ50, Repaired

LG RM-30LZ50-

Symptom:

Irregular glittering speckles on screen.

Repair:

Remove C857, 220uF @16V electrolytic capacitor on main board
and replace with 470UF @16V electrolytic Capacitor.


Check out LCD TV Repair Case Histories.

Monday, February 1, 2010

LCD TV Repair Case Histories

Our newest ebook release. This is a straight to the point guide, "LCD TV Repair Case Histories". Common LCD TV makes and models, symptoms of failure and what was done to repair the TV. Learn what is needed to fix your broken LCD TV and get email support from a professional. This 33 page guide is only $10 and you can download it immediately after purchasing.

These makes and models inside.....

AKAI
LCT2662
LCT2715
LCT2785TA
LCT3201AD
LCT42Z6TM

Element
FLX3211B
FLX3210

Emerson
EWL20S5
LC320EM81
LC320EM8AN

Hyundai
E260D
LC-23Y18

LG
26LX1D
32lc2d
32LC2d
37LC2D

Magnavox
19MF337B
37MF321D37
32MF231D/37
32MF338B/F7

Philips
37MF331D/37

Polaroid
FLM3732
FLM3738
FLM373B

Samsung
LN26A450
LN32B540P8D
LN40A650
LNS2651DX/XAA
LNS4041DX/XAA
LNS4051D
LNT3253HX
LNT4061FX/XAA
LNT4661F
LNT4665FX/XAA
LNT4671FX/XAA
LNT5271FX/XAA

Sanyo
DP32746

Sceptre
X32GV-Komodo

Sharp
LC37D43U

Sylvania
6620LF4
6637LCT
LC200SL8
LC320SL8
LD370SS8
SSL2006

Toshiba
52RV530U
37HLV66
42LX196

Vizio
L37HDTV
VO47FHDTV
vp322

Westinghouse
LTV27W2
LTV27w7
LTV32W1
LTV32W4HDC



Click here to read more.