TV Repair Reference Library

[Peter Chiu]

How to by pass LCD screen protection?

Screen Black (no display) failure usually encounter some display only one lamp or circuit protection. For easy troubleshooting , we need to remove (by pass) the protection.


OZ9938 remove protection circuit:
1. pin 3 short to ground
2. pin 6 short to ground
3. pin 7 short to ground, remove the grounding resistance ,to remove protection.

MP1038EY connecting wire pin 11 and pin 2 ,to remove protection.

TL5001 short pin 5 to ground ,to remove protection.

TL1451 short pin 15 to ground, to remove protection.

TL5451 short pin 15 to ground, to remove protection.

BA9741 short pin 15 to ground, to remove protection.

BA9743 short pin 15 to ground, to remove protection.

MB3775 short pin 15 to ground, to remove protection.

AT1741 short pin 15 to ground, to remove protection.

AT1380 short pin 2 to ground, to remove protection.

KA7500 short pin 1 and pin 16 to ground, to remove protection.

TL494 short pin 1 and pin 16 to ground. IF not work, short pin 4 to ground.

FA3629 short external capacitor over pin 15 and pin 16

FA3630 short pin 7 and pin 10 to ground, to remove protection.

OZ960 OZ962 short pin 2 to ground, to remove protection.

OZ965 short pin 4 and pin 6 to ground, to remove protection.

OZ9RR short pin 8 and pin 9 to ground, to remove protection.



BIT3101 Cavitate pin 2 and pin 15 pins (suck out the solder, let the pins float.)

BIT3102 Cavitate pin 5
BIT3105 Cavitate pin 4
BIT3106 Cavitate pin 4 and pin 27

BIT3107 Cavitate pin 4

BIT3193 Cavitate pin 15 pin 3

AAT1100 pin 8 short to ground, to remove protection.

AAT1107 pin 15 short to ground, to remove protection.


BD9884 short pin17 and pin 18 on the ground capacitance.


Can someone use spreadsheet make it better?

[Peter Chiu]

Update:

Caution: Unprotect a circuit is dangerous only for temporally troubleshooting.

AAT1100 pin 8 short to ground, to remove protection.
AAT1107 pin 15 short to ground, to remove protection.
AT1380 short pin 2 to ground, to remove protection.
AT1741 short pin 15 to ground, to remove protection.
BA9741 short pin 15 to ground, to remove protection.
BA9743 short pin 15 to ground, to remove protection.
BD9884 short pin17 and pin 18 and ground the capacitance.
BIT3101 Cavitate pin 2 and pin 15 pins (suck out the solder, let the pins float.)
BIT3102 Cavitate pin 5
BIT3105 Cavitate pin 4
BIT3106 Cavitate pin 4 and pin 27
BIT3107 Cavitate pin 4
BIT3193 Cavitate pin 15 pin 3
FA3629 short external capacitor over pin 15 and pin 16
FA3630 short pin 7 and pin 10 to ground, to remove protection.
KA7500 short pin 1 and pin 16 to ground, to remove protection.
MB3775 short pin 15 to ground, to remove protection.
MP1038EY Connecting wire pin 11 and pin 2 ,to remove protection.
OZ960, OZ962, OZ1060 short pin 2 to ground, to remove protection.
OZ964 short pin 2 to ground, to remove protection. Tested 3/2015 on Sanyo
DP42848
OZ965 short pin 4 and pin 6 to ground, to remove protection.
OZ9938 1. pin 3 short to ground. 2. pin 6 short to ground. 3. pin 7 short to ground,
remove the grounding resistance ,to remove protection.
OZ9RR short pin 8 and pin 9 to ground, to remove protection.
TL1451 short pin 15 to ground, to remove protection.
TL494 short pin 1 and pin 16 to ground. If not work, short pin 4 to ground.
TL5001 short pin 5 to ground ,to remove protection.
TL5451 short pin 15 to ground, to remove protection.

[alancilia]

Hi
I have been using this forum for quite some time now , and I can say you are an amazing Community .

These last few weeks I have been writing a Fault Database for the community
Everyone can instantly add new categories and faults entries to share with others

You can search the database by category , fault description , or diagnosis / fix .
I know I still have some minor bugs I will be working on when I find some free time
Here is the url
http://fault-database.host56.com/Faults
Register and login.
Any suggestions are welcome.

[nyak54]

Hiya all.
New to this site and just browsing, for now.

[Luighi]

Have a Samsung ln40A530p1fxza. Showing solarized colors, even the menu letters are messed up. Tried all inputs. Did factory reset in service menu, when tried to calibrate HDMI it always said "Failed". Yesterday tried to watch a football game and as I was browsing games, for a second the picture came back normal but then switched back to solarized colors. Do you guys think it is the T-Con board or a bad cable?

[mmartell]

Originally Posted by Luighi

Have a Samsung ln40A530p1fxza. Showing solarized colors, even the menu letters are messed up. Tried all inputs. Did factory reset in service menu, when tried to calibrate HDMI it always said "Failed". Yesterday tried to watch a football game and as I was browsing games, for a second the picture came back normal but then switched back to solarized colors. Do you guys think it is the T-Con board or a bad cable?

Check other thread you posted in regarding this. You have a defective ic on your tcon board. Replace it or get it serviced.

[Kom]

Hello there ..

AS15 gamma processor is usually broken.

What could be the reason for this?

SCL / SDA signal irregularities? Did you study the effect of high frequency? Is the workload?

It's a question a lot in my head. If the answers come from your friends, I'll be happy.
Please provide a description theorists ...
Thank you ..

[vovay45]

Pioneer PDP-42-A3HD
When I turn power ON
1.Green light is ON
2.I hear some relay switching on and off but nothing on display and no control.

[estherbook]

I really need some help, my TV suddenly has no image!




_________________________________
Black Cocktail Dresses

[bozharry]

Hi i have a finlux 32"That keeps turning on and off by its self.From what i gather is that i need a firmware update?Heres the model number 32LCDHDS-SAT.Have no idea where to get firmware.Even if someone knows What Vestel cross reference this set is.Any help greatly accepted.

[dvsguy]

hey guys have a panasonic 42 inch viera TH-L42U20Z with 7 red blinking lights of doom, can anyone help me with this ?

[rafi.dmm]

sony led tv klv modal 32R402A fault symtom no standby led not glove 1.2v ok, 1.5v ok, 5.1v ok, and
panel 12v not ok mosfet input 19v ok output not ok thair is no shart circuit. aney one solve
prablam please.

[dskall]

This is wrong thread to post your repair questions!

[nats62]

Originally Posted by LongJohns

another source for manuals:

http://www.electronica-pt.com/index....,select/id,13/

or

http://www.eserviceinfo.com/

hi please can i ask if any one knows whear i can get full schematics for a samsung plasma tv 50 inch model number on tv is ps50b451b2wxxu as am trying to fix the y sustain board that has short circuit on the last 3 input pins board number from bar code sb601a a2 93p okb-aa2 the pba no is lj92-01601a samsung call the board y main any help wuled be good many thanks from nats62

[j85loos]

I have a samsung UN60H6203AFXZA with issues to be completely honest I am a novice at best.I have replaced all three boards and the TV will not turn on unless I do not have the LED back lights connected power supply board. The TV does turn on but only when the LED lights are not connected to the power supply board I did a flashlight test that lets me see an image however I don't know how to tell if I need new LED lights or if my power supply board that I ordered was bad. I Am brand new to this site and do not know how to navigate it yet do not wish to break any kind of protocol just do not know where I should start seeking help at?

[dskall]

Originally Posted by dskall

This is wrong thread to post your repair questions!

This is sticky for repair reference

[msuarez]

Hello, I want to know how fix backlight failure in a westinghouse 32' lcd tv DW32H1G1

[cipy1]

Needed dump?
COMPATIBLE PRE-PROGRAMMED EEPROM
Digitrex CTF3271
U17 Flash W25Q16
or:
COMPATIBLE PRE-PROGRAMMED EEPROM
EVOTEL ELCD40USBFHD
T.SP9100.1D 9252
U17 Flash W25Q16
or:

Model No/sn032L153
Chassis MB T.SP9100.1D 9252
Main board MB T.SP9100.1D 9252
LVDS/TCON 320ap0302lv0.1
Panel -samsung lta320ap02
Tuner analog/digital -cdt-sft33840
U17 Flash W25Q16

[cankanima]

yes, as above said I'd like to share something. A useful tutorial to solve TV issue.
1. Corrupted MP4 video
For the already damaged MP4 video, you can repair corrupted MP4 first and then try to play.
2. Encrypted MP4 video
If the MP4 video is encrypted or requires authorization, it can not be played if there is no license or specified program.
3. MP4 video is Stored on USB
If the USB does not support high-speed transmission, it will probably not be able to play smoothly or even fail.
4. Higher Bit Rate or Frame Rate
As the Samsung TV models are different, it will lead to playback failure if the bit rate or frame rate is higher than the supported standard value.
5. Incompatible Codec
The most common Samsung TV MP4 playback problem is because of incompatible codecs. (source from http://www.videoconverterfactory.com/tips/samsung-tv-mp4.html.)

[dick_barton]

Pin out for various capacitors