Panasonic TC-L39EM6X Schematic

FILE NO

SERVICE MANUAL LED TV

TC-L39EM6X

CONTENTS

1. Safety precautions .................................................................................................

2. Alignment instructions and method of software upgrading.....................................

3. Working principle analysis of the unit ...................................................................

4. Specifications.......................................................................................................13

5. Block diagram ......................................................................................................

6. IC block diagram..................................................................................................

7. Wiring diagram ...................................................................................................

8. Troubleshooting guide..........................................................................................

9. Schematic diagram ..............................................................................................33

10. APPENDIX-A: Assembly list

APPENDIX-B: Exploded View

11. Disassembly and Assembly Instructions

Attention:

please read the following points carefully.

Safety precautions

This service manual is only for service personnel to take reference with. Before

servicing

1. Instructions

Be sure to switch off the power supply before replacing or welding any components or inserting/plugging process!):

a) Do not touch here and there by hand at will; b) Be sure to use anti static electric iron; c) It’s a must for the welder to wear anti static gloves. Please refer to the detailed list before replacing components that have special safety requirements.

not change the specs and type at will.

connection wire Anti static measures to be taken (throughout the entire production

2. Points for attention in servicing of LED

2.1 Screens are different from one model to another and therefore not interchangeable. Be sure to

Use the screen of the original model for replacement.

2.2 The operation voltage of LED screen is protecting right

yourself and the machine when testing the system in the course of normal operation or

after the power is switched off. Please do not touch the circuit or the metal part of the module

high voltage. Be

sure to take proper measures in

That is in operation mode. Relevant operation is possible only one minute after the power is switched off.

2.3 Do not use any adapter that is not identical with the TV set. Otherwise it will cause fire or damage to the set.

2.4 Never operate the set or do any installation work in bad environment such as wet bathroom,

laundry, Otherwise

2.5 If any foreign substance such as water, liquid, metal slices or other matters happens to fall into the

module, be sure to cut the power off immediately and do not move anything on the module lest it should cause fire or electric shock due to contact with the high voltage or short circuit.

2.6 Should there be smoke, abnormal smell or sound from the module, please shut the power off at

once. power

2.7 Do not pull out or plug in the connection wire when the module is in operation or just after the

power circuit.

2.8 When operating or installing LED please don’t subject the LED components to bending, twisting or

extrusion, collision lest mishap should result.

2.9 As most of the circuitry in LED TV set is composed of CMOS integrated circuits, it’s necessary to

pay attention to anti statics. Before servicing LED TV make sure to take anti static measure and ensure

kitchen, or nearby fire source, heating equipment and devices or exposure to sunlight etc.

bad effect will result.

Likewise, if the screen is not working after the power is on or in the course of operation, the

must be cut off immediately and no more operation is allowed under the same condition.

off because in this case relatively high voltage still remains in the capacitor of the driving

Please wait at least one minute before the pulling out or plugging in the connection wire.

full grounding for all the parts that have to be grounded.

2.10 There are lots of connection wires between parts behind the LED screen. When servicing or

moving would

If the connection wires, connections or components fixed by the thermo tropic glue need to disengage when service, please soak the thermo tropic glue into the alcohol and then pull them out in case of damage.

the set please take care not to touch or scratch them. Once they are damaged the screen

unable to work and no way to get it repaired.

2.11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead to

breakage before

2.12 For the storage make sure to put it in a place where the environment can be controlled so as to

prevent prolonged place.

screen glass or damage to driving circuit. Therefore it must be packed in a strong case

the transportation or handling.

the temperature and humidity from exceeding the limits as specified in the manual. For

storage, it is necessary to house it in an anti-moisture bag and put them altogether in one

The ambient conditions are tabulated as follows:

Temperature

Scope for operation

~ + 35

Humidity

2.13

Display of a fixed picture for a long time may result in appearance of picture residue on the

screen, of LED screen. This phenomenon doesn’t represent failure. This “ghost shadow” may remain in the picture for a period of time (several minutes). But when operating it please avoid displaying still picture in high brightness for a long time.

commonly called “ghost shadow”. The extent of the residual picture varies with the maker

Scope for storage

Scope for operation

Scope for storage

-20 ~

+ 60oC

20% ~

10% ~ 90%

3. Points for attention during installation

3.1 The front panel of LED screen is of glass. When installing it please make sure to put it in place.

3.2 For service or installation it’s necessary to use specified screw lest it should damage the screen.

3.3 Be sure to take anti dust measures. Any foreign substance that happens to fall down between the

screen and the glass will affect the receiving and viewing effect

3.4 When dismantling or mounting the protective partition plate that is used for anti vibration and

insulation

3.5 Be sure to protect the cabinet from damage or scratch during service, dismantling or mounting.

please take care to keep it in intactness so as to avoid hidden trouble.

2. Alignment instructions

(1) Test equipment

VG-859 (YPbPr, VGA, HDMI signal generator) FLUKE 54200(TV signal generator) CA310

(white balancer)

(2) Power test

Connect main board, power board and IR board according the wiring diagram, connect the power and press power key (Remote controller or Keypad) button to turn on the TV.

a) Test the pin voltage of P802/power board , the data is shown in table1:

Table1

voltage data of P802

For 39”

P802 Pin1,2 Pin3,4 Pin5,6,7 Pin8,9 Pin10,11

Voltage GND 11.4V~12.6V GND 11.4V~12.6V 4.75V~5.25V

For 39”

Pin12 Pin13 Pin 14 Pin15 Pin16

On:2.5V~5.25V Off: 0~0.5V

Normal: 2.0~5V Abnormal :0~0.5V

On:2.5V~5.25V

Off: 0~0.5V

Duty 5%~100% NC

(3) Alignment flow-chart

The alignment flow-chart is shown as fig-1

Connect to the center signal source and check each Function of TV (station leaking, analog control, etc.)

Check the output of speaker.

Check if EDID, HDCP KEY, FLASH are written

Combined test for general assembly

Auto Gamma adjustment

Input AV signal and check the function

Input HD signal and check the function of YPbPr

Input USB signal and check if the display is normal, check

the function (analog control), horizontal/vertical center, etc.

Input HDMI signal and check if the display is normal, check

the function (analog control), horizontal/vertical center, etc. Checking SPDIF will output the signal on Amplifier.

Preset ex-factory

Check the accessories and packing

Fig-1 adjustment flow-chart

(4) Adjustment instruction

At any input source then press the “←”, “EXIT” and “OK” (using RC within 1 sec) to enter factory mode

During Factory menu, if “EXIT” key is pushed, system will exit factory mode.

4-1. Auto Gamma Adjustment & Check

4-2.1. Set into factory mode then choose Auto Gamma Adjust,

4-2.2. Press "2" "3" "2" "4" in turn within 1sec to enter the item, and push Init will self-generate gray pattern for adjusting.

4-2.3. Following the Cool spec as bellow.

Color Cool

100IRE 0.2662

50IRE 0.2658

Adjust

Tolerance

100IRE 0.2667

50IRE 0.2654

±0.005

(1) Adjust 100IRE

First, Decrease G to meet y spec(0.2667). Second, Decrease R to meet x spec(0.2662). (2) Adjust 50IRE First, Decrease G to meet y spec(0.2654). Second, Decrease R to meet x spec(0.2658). Note: Do not adjust the B GAIN on both 100IRE and 50IRE. When match the spec, pressing “Save” then exit the adjustment page.

(3) When match the spec, pressing right key in "Save" position then exit the adjustment page.

4-2.4. Exit Factory Mode:

After finish Gamma adjust press [EXIT] to exit factory mode.

(5) Items of Factory menu

When in any source, press the “Left -> Exit -> Enter” key of remote control can enter into factory mode. During Factory menu, only “EXIT” key is pushed, system will exit factory mode. Press up and down key can move high light item from Model Change -> Color Temp. Adjust -> Auto Gamma Adjust -> Timer Clear -> Preset Channel -> Full Power -> ADC Calibration -> Shipping reset -> Bypass Gamma -> UART Enable -> I2C -> Boot Loader Upgrade -> V-Com Adjust -> SG Pattern. Push “Enter” key can enter high light item function. (Press left and right can adjust value) Display Model version, Release Date, firmware version and released date on the bottom.

1)Model ID Press up or down key can select high light item function Press enter or right key to enter the item. It's only used for FW engineer.

2)Color Temp. Adjust

Press up or down key can select high light item function Press enter or right key to enter the item. It's only used for PQ engineer.

3)Auto Gamma Adjust

Press up or down key can select high light item function Press enter or right key to enter the item. It's only used for PQ engineer.

4)Timer Clear

Reset the timer which records hours of LED panel burn in This item will have a check dialog “yes or no” to do or not.

- Time in factory mode: Time function shall be displayed automatically. Saving the total time of system power on (LED turn on), and count the time automatically. The timer is continuous and saved (per 10 minutes) forever, unless it will be reset by doing “Timer Clear”.

5)Preset channel

Load preset channel for production line.

6)Full Power This is for power consumption testing. To measure the maximum power consumption of TV set, we adjust the value of following items to maximum.

- Video: Contrast maximum value, Brightness maximum value, Backlight maximum value.

- Audio: Volume maximum value, Bass default value, Treble default value. Press enter key to turn on Full Power and OSD stay display until press enter key to recover from Full Power.

7)ADC Calibration ADC Calibration function is reserved for calibration by hand (PQ engineer only).

8)Shipping reset

Reset all settings of OSD menu to default value. Reset settings: Channel table, Model table (H/V Position, Clock, Phase), Source dependent setting (Contrast, Brightness etc.), Common setting (Volume, Language etc.), Parental Control (Rating, Password etc), Closed Caption.

9)Bypass Gamma For factory test value of gamma.

10)UART Enable Enable to communicate with Auto-Alignment system.

11)I2C

Enable to communicate with Eeprom burn-in tool.

12)Boot Loader Upgrade For firmware downgrade used.

13)V-Com Adjust It's reserved for BMS function.

14)SG Pattern Aging is for factory burn in and PTN ID provides each pattern for tester using.

(6) Performance check

6-1 TV function Connect RF to the center signal source, enter Channel menu → auto tuning, check if there are channels be skipped, check if the picture and speaker are normal.

6-2 AV terminals Input Video signal, check if the picture and sound are normal.

6-3 YPbPr terminal Input YUV signal (VG859 signal generator), separately input the YUV signals listed in table4 and check if the display and sound are normal at any situation (power on, channel switch and format convert, etc.)

Table4

YUV signal format

FREQ PERIOD

SYNC

POLARITY

PIXEL

CLOCK

Display

SYNC

WIDTH

BACK

PORCH

MODE

LINE(kHz)

FRAME

(Hz)

LINE (pixel)

FIELD

(lines)

LINE

FIELD

(MHz)

LINE (pixel)

FRAME

(lines)

LINE (pixel)

FRAME

(lines)

LINE (pixel)

FRAME

(lines)

15.734 1716 Negitive 27 1440 124 114

59.94Hz 720x480i

59.94Hz 720x480P

60Hz 1280x720P

60Hz 1920X1080i

60Hz 1920X1080P

59.94 525 Negitive 480 3 15

31,469 858 Negitive 27 720 62 60

59.94 525 Negitive 480 6 30

45 1650 Positive 74.25 1280 40 220

60 750 Positive 720 5 20

33.75 2200 Positive 74.25 1920 44 148

60 1125 Positive 1080 5 15

67.5 2200 Positive 148.5 1920 44 148

60 1125 Positive 1080 5 36

6-4 HDMI terminal Input HDMI signal (VG859 signal generator), separately input the signals listed in table6 and check the display and sound (32 KHz, 44.1 KHz, 48 KHz) at any situation (power on, channel switch and format convert, etc.)

HDMI signal format

SYNC

POLARITY

PIXEL

CLOCK

Display

SYNC

WIDTH

BACK

PORCH

HDMI

1/2/ DVI

Timing

Table

Table6

FREQ FREQ PERIOD

MODE

640x480

800x600

1024x768

1280x768 (1280cvt)

1280x768

1280x1024

1360x768

1366x768

1920x1080

59.94Hz 1440x480i

59.94Hz 720x480P

60Hz 1280x720P

60Hz 1920X1080i

24Hz 1920x1080P

30Hz 1920x1080P

60Hz 1920X1080P

LINE(kHz)

FRAME(Hz)

31.47 800 Negitive 25.175 640 96 48

LINE (pixel)

FIELD(lines)

LINE

FIELD

(MHz)

LINE (pixel)

FRAME

(lines)

LINE (pixel)

FRAME

(lines)

LINE (pixel)

FRAME

(lines)

59.94 525 Negitive 480 2 33

37.88 1056 Positive 40 800 128 88

60.32 628 Positive 600 4 23

48.36 1344 Negitive 65 1024 136 160

60 806 Negitive 768 6 29

47.4 1440 Positive 68.25 1280 32 80

59.99 790 Negitive 768 7 12

47.78 1664 Negitive 79.5 1280 128 192

59.87 798 Positive 768 7 20

63.98 1688 Positive 108 1280 112 248

60.02 1066 Positive 1024 3 38

47.71 1792 Positive 85.5 1360 112 256

60.02 795 Positive 768 6 18

47.71 1792 Positive 85.5 1366 112 256

59.79 795 Positive 768 6 18

67.5 2200 Positive 148.5 1920 44 148

60 1125 Positive 1080 5 36

15.73 1716 Negitive 27 1440 124 114

59.94 262.5 Negitive 480 3 15

31.47 858 Negitive 27 720 62 60

59.94 525 Negitive 480 6 30

45 1650 Positive 74.25 1280 40 220

60 750 Positive 720 5 20

33.75 2200 Positive 74.25 1920 44 148

60 562.5 Positive 1080 5 15

27 2750 Positive 74.25 1920 44 148

24 1125 Positive 1080 5 36

33.75 2200 Positive 74.25 1920 44 148

30 1125 Positive 1080 5 36

67.5 2200 Positive 148.5 1920 44 148

60 1125 Positive 1080 5 36

6-5 other functions check a) Check the sleep timer, picture/sound mode, OSD, stereo and analog TV Teletext, etc.

(7) Firmware update process

(1) Plug the USB with the firmware file named upgrade_2013_NA_60.pkg (2) If system detect upgrade_2013_NA_60.pkg, USB upgrade message would appear automatically. (3) Press Up key to select Yes, and then press OK key to start the upgrading.

(4) Upgrading is starting, please wait for the progress finish.

(5) When the progress completed, please follow the instruction to remove USB and restart Power off

then on.

Working principle analysis of the unit

NTSC Antenna sig nal will be send to tuner TDST-H021F, output standard video signal TV-CVBS, and sound SIF signal

signals flow:

the n Tun er wil l be

demodulating and

TV-CVBS will send to the master control IC MT5385 to video decode, de-interlace and scaler, then output The volume digital amplifier TAS5707.

2. Composite/Component signal flow

LVDS level drive for panel display.

sound IF (SIF) will be fed into MT5385, after demodulating, pre-amplifying, bass adjusting and

control, the sound signal

will b e tr ansform into di gital I2S sign al

and sent to

Composite signal an d Compo nent signal will be fed to MT5385 to perform video decode, deinterlace Audio signal from Composite/Component

and scaler, then output LVDS drive level for panel display.

terminal adjust and volume control, the sound signal will to digital amplifier TAS5707.

3. HDMI signal flow

via matched resistance is fed to MT5385 to bass

be transform into digital I2S signal

and sent

Two HDMI video signals are directly fed to the master control IC MT5385 to digital decode, image scale, then output LVDS drive level for panel display. HDMI audio signal via decoder built-in

adjust and volume control, the sound signal will

bass sent to digital amplifier TAS5707.

be transform into digital I2S signal

MT5385

4. USB signal flow USB signal via USB connector sent to MT5385, then output image scale, then send to LVDS level drive for panel display. Sound signal of USB signal volume control, the sound signal will amplifier TAS5707.

5. SPDIF signal flow The master control IC MT5385 will transfer digital sound signal out by format Dobly Digital or PCM.

MT53 85 and its

R/G/B of 24 bit to back end module to Video decode,

A/D conversion to

YPbPr

output

for

de-interlace and

via

matched resistance

be transform into digital I2S signal

and

sent to MT5385 to bass adjust and

and sent to digital

and

4. Specifications

5-1 Block Diagram EE:

SPE39T 39” Block Diagram

A70 60Hz Models by MTK MT5835 Platform

H5TQ1G63DFR-PBC

MX25L12845EMI-10G

IF +/-

Tuner

TDSTH021F

5-1 Block Diagram

ANT /

CABLE

Power board:FSP

DDR3 1G-1600

Flash 16MB

CVBS/Y Pb Pr

& Audio R/L

COLOR STREAM HD

& COMPOSITE IN

& Audio R/L in

WXGA :2x10 Full-HD :2x20

Panel out

R_out

Audio

AMP

TAS5707

Audio I2S output

L_out

DTV system IC

MTK

MT5385

S/PDIF

Enable

ARC

Buffer

EEPROM 64KB

24C32

Crystal

27MHz

SPE39T 39” Block Diagram

SPDIF

OUT

HDMI 1

HDMI 2

USB

Keypad

IR / LED-R

Board

Power Board: FSP

Power Board: DARFON

IC block diagram

1. MT5385

GENERAL FEATURE LIST

Host CPU

 ARM11 single core 700MHz  Floating Point Unit  16K I-Cache and 16K D-Cache for ARM11 core  128K L2 Cache  Boot ROM  Boot from serial flash, NAND flash  Supports security boot  JTAG ICE interface  Watch Dog timers

General Copy Protection Unit

 Supports CPPM/CPRM  Supports AES with 128/192/256 bit key  Supports AACS  Supports DES/3DES  Supports SHA-1/224/256  Supports MD5  Supports CSS  Supports RC4  Random number generator

MPEG1 Decoder

MPEG2 Decoder

 MPEG MP@ML, MP@HL  Supports de-blocking filter  Full-HD 30P dual decoder

MPEG4 Decoder (option)

 ASP@L5  Full-HD 30P dual decoder

H.264 (MPEG4.10 / AVC) HD Decoder (option)

 MP@L4.0, HP@L4.0, constrained BP@L3 video standard  Full-HD 30P dual decoder

VC-1 (SMPTE421M) Decoder (option)

 MP@HL, AP@L3  WMV9 decoder MP@HL  Full-HD 30P dual decoder

DivX (XviD) Decoder (option)

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