Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Friday, 8 March 2019

HOW TO ENTER SERVICE MODE SAMSUNG LCD TV - SAMSUNG LE37M87BDX - LE40M87BDX - LE46M87BDX - LE52M87BDX SERVICE MODE AND TROUBLE SHOOTING

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 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 DIAGRAM

CLICK ON THE IMAGE TO ZOOM IN