Samsung 2012 LCD LED TV training course

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CONTENTS

2012 LED Hybrid TV & LCD TV - 2

Preparation for Service - 5

IP SMPS Power Board - 11

Main Board 2012 LED Hybrid & LCD Models - 20

T-CON Board - 24

Factory Test Mode - 27

2012 LED Hybrid Front Cover Disassembly - 32

2012 Jog Function Control - 35

2012 LED TV - 39

Disassembly Repair Preparation UN**ES8000 - 43

SMPS Board - 50

Main Board 2012 LED TVs - 60

T-CON Board - 69

2012 moIP (Camera/MIC) Module - 82

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2

The UN EH 4000 & 5000 Series includes The new Jog Function Control with a built in

Power/IR Indicator & Remote Control Sensor for these models

3

Rear View

4

NOTE: It’s really important to first disconnect the function Assy Cable by removing the

cover jack with one screw and then disconnecting the cable Taking the rear cover off

without doing so has resulted in damage to the function Assy and cable connection

6

Pictured on right is an actual damaged PC Connector from not first removing the Jog

Function connector before removing the back panel

7

The Layout for the UN EH TV Models include the Main Board & IP/SMPS Board shown here

with its two important connectors going to the Main Board and Back Light LEDS The T-CON

Board is now part of the panel assembly pictured on the bottom left

8

The LED Hybrid Models utilizes LED Direct Backlight placed in similar Backlight horizontal

rear panel position as the CCFL LCD Backlights this makes the panel to have a thicker rear

section as compared to Slim LED with edge lit LEDs …

- LCD panels are made up of rows and columns of red green and blue sub pixels The TCON

board selects the specific sub pixel (each LCD) and controls the amount of light produced

for that area

-The panel resolution determines the number of pixels For example a 720P panel has 1280

horizontal pixels and 768 vertical rows A 1080P panel has 1920 horizontal pixels and 1080

rows Obviously the higher resolution requires that many more control lines

-The video data signal outputs from the Main Board thru an LVDS Cable to the FRC/TCON

Board

- The TCON Board provides the Row and Column Drive to the LCDs in time with the Scan

Signal

- The Main Board supplies PS ON & BL ON signals to the SMPS Board which turns on the

LED Backlight while providing supply voltages to the other Board Assemblies

9

A sample of the Wiring Diagram is shown here… The Main Board connector 201 to the IP or

SMPS Board The ip Board to the LEDs on the Panel… The Main Board to the Jog

Function/IR/LED ASSY… the Main Board to the Speakers and also through the LVDS Cable to

the T-Con Board now part of the panel

10

The power on sequence is shown:

-The 5V standby is supplied to the Main Board from the power supply

- The Power On/Off command is sent from the Main Board to the Power Supply via CN

803-14 in this example providing 0V to 3.5V when activated

-The Power Supply then provides all low voltages The former Booting Melody is triggered

for this model

The Main Board sends Blu ON -Back Light On command to the Power Supply 0V to 4,9V

after approx a 5 sec delay

13

-The Main Board also supplies a PWM Back Light Dim Control Command to the Power

Supply 5V to 4.0V DC effective that can be measures as the dim changes from a 0 setting

to a 20 auto or user setting for back light control

- Finally the Power Supply sends two D1 Dim Control output signals to the LEDS D1

negative changing from 1.3V to 32.8V effective DC voltage while the D positive stays fixed

at approx 110V

14

The 2012 LCD Layout & Circuitry is very similar to 2011 LCD Models & includes: Main

Board; SMPS (Switching Mode Power Supply) Board/IP (Inverter Power) Board; IP Buffer

Board; T-Con Board; L&R Speakers

15

Typical wiring Diagram of the 2011 LCD Models and now 2012 is shown The Main Board

again providing Power ON to the IP Power Supply Board after receiving it’s command from

the Function/IR Assembly The Power Supply in turn providing Supply Voltages to the Main

Board and IP Buffer Board for Back Light CCFL Control Operation The Main Board also

providing Digital Video Data Signal to the T-CON Board via the LVDS Cable and also audio

to the speakers

16

Typical to the 2011 and 2012 is the LCD’s Power ON Sequence that begins at the Power

Supply Connection to/from the Main Board The 5V standby is first supplied to the Main

Board & can be seen on pin 12 “A5V” (always 5V);

PS_On from the Main Board is sent to the Power supply changing from 0V to 3.5V The

Back Light on command BLU_ON from the Main to the supply on pin 6, 0V to 5V; The Main

Boards Dim Control Signal, P_Dim found on Pin 2 will range from 5V to 1.5V depending on

Back Light Dimming and finally switched voltages “B5V” & “B13V” can be found on their

associated pins

17

Drive Signals between the LCD Power Supply and IP Buffer Board are now seen here.

In this example High and Low Pin Drive Voltages are found on

-“Pin 1 and Pin 3 … Be extra careful when troubleshooting since these voltages can run very

high, up to 4000V P-P in some previous models, in order to drive the CCFLs

-The 0VP protection and CCFL Power operation verification on pin 9 will change from near

0v DC when back light is lowest dim to 1V at max bright

-13V should be measured at “VCC” Pin 11 as well as at Pin 10 12 V should be measured at

LD pin 12 when troubleshooting

18

The 2012 LED Hybrid Main Board Layout is shown here New for 2012 is the MSTAR X9

Processor…

2 HDMI and USB connectors on the upper left, Monitor & Optical Out are seen near

bottom center, as well as component & Composite connectors at center and Power Supply

connection CN201 and LVDS Connector on the upper right

21

Main Board Diagram includes the SEMS23 (MSTAR X9)

Processor A one chip design, it receives and processes the Tuner, Audio, HDMI and other

input signals just discussed It also receives IR Keyboard and other info for processing and

control and outputs the final 10Bit Video Data Signal to the FRC/T-CON Board which in turn

controls the Panel LCDs A troubleshooting note is the return of the “Melody” heard during

start up and only used for this series

22

The LCD’s SEMS20 Mstar X5 Processor is the same used for 2011 LCD and is also a one chip

design and processes similar to the X9 discussed A troubleshooting note is the On Screen

Booting Logo that is used during start up with no melody introduced in 2011

23

Troubleshooting T-Con/Panel can begin by measuring the operating voltage in from the

Main Board LVDS Cable at both sides of FP1

-If the 12V supply appears on both sides of the fuse (with meter reference to chassis

ground), a correct supply is given and used by the T-Con

-If the 12V only appears at the LVDS Cable End of the Fuse The fuse is open and

T-Con/Panel needs to be replaced Sometime replacing a fuse will correct the failure,

however, before proceeding, check for any bulletins related to this condition

-If the 12V does not appear on either end of the fuse, the LVDS Cable and Main Board feeds

need to be checked and LVDS Cable or Main board replaced ALSO: check that the 12V

supply feed from the Power Supply to the Main board is present

25

Troubleshooting the T-CON Board in the 2012 LCD Models is similar by locating and

checking F1 Fuse condition If the supply voltage does not appear on either end of the fuse

check the LVDS Cable & Main Board If the fuse is open, check & replace the T-CON Board

Troubleshooting T-Con can begin by measuring the operating voltage in from the Main

Board LVDS Cable at both sides of F1 (Fuse 1)

-If the 13V supply appears on both sides (with meter reference to chassis ground) of the

fuse correct supply is given and used by the T-Con

-If the 13V only appears at the LVDS Cable End of the Fuse The fuse is open and T-Con

needs to be replaced

-If the 13V does not appear on either end of the fuse, the LVDS Cable and Main Board fees

need to be checked and LVDS Cable or Main board replaced ALSO: check the 13V supply

feed from SMPS to Main board is present, if not, replace the SMPS Board

26

New to Option Bytes shown here is Local Set Other model TVs have other additional info

new to 2012

28

Activating Test Patterns in Factory Mode are very important to troubleshooting Seen here

the Mstar Test Patterns that are generated from the Main Board can be observed by

selecting SVC, than Test Pattern, than Mstar Test Pattern, and finally activating and

scrolling through the patterns provided Also use the Customer Picture Test and the Display

to help isolate Video noise problems

29

Every service should include a software check and upgrade performed.

-The Main SW (SoftWare) Firmware version is listed at the top right of the first Factory

Mode Screen

-The Sub Micom version is listed in the second item down on the right hand side

30

-The Main Firmware can be changed by “Over The Network”, on TVs with a WiFi connection

or with an external USB Memory Stick Disrupting the download to the TVs internal

memory before transfer will not cause any problems or failures

-However, when directed to upgrade the Sub Micom, It will required an upgrade with an

external memory stick Follow the procedures provided with the upgrade carefully

Disrupting power or download to the TV will result in a Main Board failure

31

Front Cover Cautions: When just replacing the Front Cover (due to damage or scratches)

simply cut the top of the Cover This will prevent the removal process from Damaging the

connections on the side of the panel New panels come with the Front Cover

33

Reassembly

34

The UNEH4000 will be used as an example of the 5 Directional Function Control

The five commands: Press for Power/ & Menu Enter, Left & Right for Volume & Menu

Select , Up & Down for Channel & Menu Select are all functions that can be tested in TV

standby mode

Some models include a built in IR Sensor as in this example

The Main Board monitors IR, Key 1 and Key 2 for function control command changes It

also supplies a 3.3V standby to the Function Control

Key 1 shown on pin 6 in this example is dedicated to the center “Press” command

The other functions Left, Right, Up, & Down are all monitored by the Main Board for

corresponding voltage changes on Key 2

36

-First check the 3.3 Standby Voltage found on pin 3 of the function connector in this example.

-For models with an IR sensor on the Jog Function Control, You can then check the IR voltages

found on pin 1 Each press of the remote control will produce the data shown here on the scope,

and also an effective 2.5V DC from 3.3V that can be measured with a volt meter.

-Now

- Pushing the center “Press” Switch will change Key1’s 3.3V to 0V found on pin 6 in this example.

-Check “Left” Key 2 on pin 7 for a change of 3.3v to 1.6VDC

-Check “Right” also Key 2 for a change from 3.3V to 2.5VDC

-Check Up on Key 2 for 3.3V to 0VDC

-And Down also on Key 2 for 3.3v to 8VDC

-Note that all voltages should begin at 3.3V … Any voltages less than that on IR or Key1 or Key 2

indicate a stuck command

5 Directional Function Control Test: Verify DC Signals:

1 Check Standby 3.3V on Function Connector, Pin 3

2 Check Customer Remote Control Functions at IR, Pin 1

3 Check Press, at Key 1, Pin 6

4 Check Left, Right, Up, Down at Key 2, Pin 7

37

The 2012 LED TVs include models with the new built in Camera/Mic called the moIP

Module for Interactive Smart TV, Also shown are models with 3D Bluetooth, Built in WiFi,

Smart Web Browsing, Micro Dimming, those with 240 or 120Hz refresh rate, and those

with Full High Depth and other specifications

40

The specifications for the ES8000 46inch and 55 inch models are shown and compared with

the 2011 models

It includes the moIP Module and all the top new features just described as well as the new

Echo-P Micro Processor we will examine later

41

The UNES8000 series Front View and accessories are shown The new Camera/Mic Module

and IR Sensor are located at top center and the new jog function control is located at the

right rear bottom back of the TV that might make it more of a challenge to access for

control

Accessories include the new Smart Touch Control Remote, Standard Remote, and IR Blaster

as well as an AV Adapter

42

Once again we will be focusing on the top of the line LED ES8000 Series TVs… Lets look at

important repair Preparations and Disassembly procedure

43

Remove the rear cover screws

-Lift and remove the rear cover while being cautious of its sharp edges

-Remove the screws of the Middle Cover which is actually the outer edge cover

-Carefully and SLOWLY lift the Middle Cover while locating the Cables still attached

45

Caution: Remove the - Function Cable,- Bluetooth Cable,- Deco Cable before

removing The Middle Cover

46

The internal Layout includes the new moIP Camera/Mic Module located at the center top

with connection cable over to the Main Board The Main Board shown with the LVDS Cable

to the T-Con Board also seen is The Power Supply ip smps Board, and the Speakers Not

pictured is the WiFi Module and the new Jog Function Control

47

- LCD panels are made up of rows and columns of red green and blue sub pixels The TCON

board selects the specific sub pixel (each LCD) and controls the amount of light produced

from that area

-The panel resolution determines the number of pixels For example a 720P panel has 1280

horizontal pixels and 768 vertical rows A 1080P panel has 1920 horizontal pixels and 1080

rows Obviously the higher resolution requires that many more control lines

-The video data signal outputs from the Main Board thru an LVDS Cable to the FRC/TCON

Board

- The TCON Board provides the Row and Column Drive to the LCDs in time with the Scan

Signal

- The Main Board supplies PS ON & BL ON signals to the SMPS Board which turns on the

LED Backlight while providing supply voltages to the other Board Assemblies

48

The Wiring Diagram of the UE8000 Series TVs includes

The moIP Camera/Mic Module connection cable to the Main Board The Main Board LVDS

Cable to the T-Con Board Main Board cables to the Power Supply Board, WiFi Module,

Bluetooth Module, Jog Function Control Assy as well as the Speakers The Power Supply

cables are also connected the Panel LEDs & Power cord and finally the T-Con Board

Connection Cables to the Panel

49

The SMPS Power Supply Board is shown here with it’s Connector to the Main Board.

Key items such as

-A5V Standby to the Main Board

-Power On/Off from the Main Board turning on the Supply

-Blu On/Off from the Main turning on & off the Back Light

-P-Dim 1 thru 4 from the Main controlling the Back Light

51