Thursday, November 26, 2015

How to enter service mode Samsung lcd tv - SAMSUNG LE37M87BDX - LE40M87BDX - LE46M87BDX - LE52M87BDX SERVICE MODE AND TROUBLE SHOOTING

LCD TV 

SAMSUNG LE37M87BDX - LE40M87BDX - LE46M87BDX - LE52M87BDX 

SERVICE MODE AND TROUBLE SHOOTING 

SERVICE MODE 
HOW TO ENTER TO SERVICE MODE  1. To enter "Service Mode" Press the remote -control keys in this sequence :
- If you do not have Factory remote – control
Power OFF > MUTE > MANU > MUTE > Power On
- If you have Factory remote - control
PICTURE ON > DISPLAY > FACTORY
The buttons are active in the service mode.
1. Remote - Control Key : Power, Arrow Up, Arrow Down, Arrow Left Arrow Right, Menu, Enter, Number Key(0- 9)
2. Function - Control Key : Power, CH +, CH -, VOL +, VOL -, Menu, TV/VIDEO(Enter)
How to check the panel 
You have to check Panel Maker Because of different adjustments as follows.
First of all, Check the label rating!
1) Label Rating File
LCD PANEL MARK 
A:ACER(AUO) S : SEC C : CMO
* If not printed you could consider S(sec) panel mark.
2) If Panel Mark is "A", Set the factory mode indicating as follows.
* Option Byte
1. Inch Option 32"
2. Gamma 32"AUO
3. Panel Option AUO
Others are same shown below.
White Balance - Calibration
If picture color is wrong, do calibration first.
Equipment : CA210, Patten : chess pattern
Execute calibration in Factory Mode
Source AV : PAL composite, Component : 1280*720/60Hz
PC : 1024*768/60Hz
White Balance - Adjustment
If picture color is wrong, check White Balance condition.
Equipment : CA210, Patten : Flat W/B Pattern
Adjust W/B in Factory Mode
Sub brightness and R/G/B Offset controls low light region
Sub contrast and R/G/B Gain controls high light region
Source AV : PAL composite, Component : 1280*720/60Hz
HDMI[DVI] : 1280*720/60Hz
Conditions for Measurement
1. On the basis of toshiba ABL pattern : High Light level (57 IRE)
INPUT SIGNAL GENERATOR : MSPG-925LTH
Mode NO 2 : 744X484@60 Hz
NO 6 : 1280X720@60 Hz
NO 21 : 1024X768@60 Hz
Pattern NO 36 : 16 Color Pattern
NO 16 : Toshiba ABL Pattern
2. Optical measuring device : CA210 (FL)
Please use the MSPG-925 LTH generator for model LE26M51B/LE32M51B/LE40M51B/LE46M51B.
Method of Adjustment
1. Adjust the white balance of AV, Component and DVI Modes.
(AV Component)
a) Set the input to the mode in which the adjustment will be made
(RF DTV PC DVI).
Input signal - VIDEO Mode : Model #2 (744*484 Mode), Pattern #16
DTV,DVI Mode : Model #6 (1280*720 Mode), Pattern #16
HDMI Mode: Model #6(1280*720 Mode), Pattern #16
b) Enter factory color control, confirm the data.
c) Adjust the low light. (Refer to table 1, 2 in adjustment position by mode)
Adjust sub - Brightness to set the 'Y' value.
Adjust red offset ('x') and blue offset ('y') to the color coordinates.
d) Adjust the high light. (Refer to table 1, 2 in adjustment position by mode)
Adjust red gain ('x') and blue gain ('y') to the color coordinates.
Do not adjust the green gain and sub-contrast (Y) data.
d) Adjust the high light. (Refer to table 1, 2 in adjustment position by mode)
Adjust red gain ('x') and blue gain ('y') to the color coordinates.
 Do not adjust the green gain and sub-contrast (Y) data.
Software Upgrade
How to Update Flash ROM
1. Install the Flash Downloader
ConnectSet(Service Jack)and Jig Cable to execute Program Update.
2. Flash Downloader program update
Before Turning on the set,Click "connect"which is under of OSD Screen!
Turn on the Set.
Troubleshooting
No Power
Does proper DC 13V appear at JP845? > Check and Change a Assy PCB Power.
Does proper DC A3.3V, A5V appear at C854, C1166_LCD? > Check a IC1112, Q1103. Change a main PCB ass'y.
Does proper DC 5V, 3.3V, 1.2V appear at C1153, C1178, C1170? >  Check a IC1111, IC1102, IC1113. Change a main PCB ass'y
No Video (Analog PC)
Does the signal appear at C2078,C2077,C2079(R, G, B) of IC2001? >  PC cable. Change a PC cable. Change a main PCB ass'y.
Does the digital data appear at the output of LVDS (RA2008~2013)? >  Check a IC2001 Change a main PCB ass'y.
Check a LVDS cable? Replace a lcd panel?
No Video (Digital-HDMI)
Does the digital data appear at R1333_UX~R1340_UX? >  Check a a IC1405 Change a main PCB ass'y.
Does the digital data appear at R1333_UX~R1340_UX? > Check a a IC1405 Change a main PCB ass'y.
Does the digital data appear at output of IC4001 LVDS(RA2008~2013)? >  Check a IC1405 Change a main PCB ass'y
No Sound
Does the signal appear at Pin #10, #12, #13, #9 (I2S_CLK, I2S_SCLK, I2S_LRCLK, I2S_DATA) of IC1202? > Check a connection harness and headphone jack./Side AV Check Sound Processor IC1202 (SGTV5810)
Check the DC 12V of IC1203? > Check a B12V Line. Change a main PCB ass'y.
Does the signal appear at Pin #47 or 48, #53 or 54(CH1_L, R Sound) And Pin #36 or 37, #30 or 31 (CH2_L, R Sound) of IC1203? >  Change a main PCB ass'y.
BLOCK DIGRAM 
CLICK ON THE IMAGE TO ZOOM IN