Panasonic TH-L42U5D Schematic

ORDER NO.PAVCI1206036CE

LCD TV

Model No. TH-L42U5D

©Panasonic Corporation 2012. Unauthorized copying and distribution is a violation of law.

CONTENTS

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

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

3. Working principle analysis of the unit ...................................................................15

4. Specifications.......................................................................................................16

5. Block diagram ......................................................................................................17

6. Wiring diagram ...................................................................................................

7. Troubleshooting guide..........................................................................................25

8. Exploded View.....................................................................................................29

9. Replacement Parts List........................................................................................31

10. Boards Layout....................................................................................................32

11. Disassembly and Assembly Instructions............................................................33

20

3

5

2

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 inserting/plugging in connection wire Anti static measures to be taken (throughout the entire production 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. Do not change the specs and type at will.

the power supply before

replacing or welding any components or

2. Points for attention in servicing of LCD

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 LCD screen is protecting yourself and the machine when testing the system in the course of normal operation or right 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, kitchen, or nearby fire source, heating equipment and devices or exposure to sunlight etc. Otherwise bad effect will result.

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. Likewise, if the screen is not working after the power is on or in the course of operation, the power must be cut off immediately and no more operation is allowed under the same condition.

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

power is off because in this case relatively high voltage still remains in the capacitor of the driving circuit. Please wait at least one minute before the pulling out or plugging in the connection wire.

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

extrusion, collision lest mishap should result.

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

pay attention to anti statics. Before servicing LCD TV make sure to take anti static measure and ensure full grounding for all the parts that have to be grounded.

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

moving the set please take care not to touch or scratch them. Once they are damaged the screen would be unable to work and no way to get it repaired.

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.

3

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

breakage of screen glass or damage to driving circuit. Therefore it must be packed in a strong case before the transportation or handling.

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

prevent the temperature and humidity from exceeding the limits as specified in the manual. For prolonged storage, it is necessary to house it in an anti-moisture bag and put them altogether in one place.

The ambient conditions are tabulated as follows:

Temperature

Scope for operation

0

~ + 35

oC

Humidity

2.13

Display of a fixed picture for a long time may result in appearance of picture residue on the screen, as commonly called “ghost shadow”. The extent of the residual picture varies with the maker of LCD 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.

Scope for storage

Scope for operation

Scope for storage

0 ~

+ 60oC

20% ~

5% ~ 90%

80

%

3. Points for attention during installation

3.1 The front panel of LCD 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 please take care to keep it in intactness so as to avoid hidden trouble.

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

4

2. Alignment instructions

(1) Test equipment

VG-859 (YPbPr, VGA, HDMI signal generator) CA210 (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 42”

P802 Pin1,2 Pin3,4 Pin5,6,7

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

For 42”

Pin12 Pin13 Pin 14 Pin15 Pin16

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

Normal:0V~0.5V Abnormal :Open drain

On:2.5V-5.25V

Off: 0-0.5V

Pin8,9 Pin10,11

Duty 20%~100% NC

5

(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 earphone and speaker.

Check if DDC, HDCP KEY, FLASH are written

Combined test for general assembly

White balance adjustment

Input AV signal and check the function

Input HD signal and check the function of YPbPr

Input VGA signal and check if the display is normal, check th

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

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 th

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

Preset ex-factory

Check the accessories and packing

Fig-1 adjustment flow-chart

6

(4) Adjustment instruction

At any input source press the Mute(keep pressing) of Remote control and “Menu” (key pad) to enter factory mode . During Factory menu, if “EXIT” key of Remote control is pushed, system will exit factory mode.

4-1. Source Calibration

4-1.1. Set the signal generator to input sources Component on LCD-TV;

Signal Format : 720P@60Hz Component 100%Color Bar Instrument (Recommend) : Astro VG-859 / timing PG2 940

Signal analog level

7

4-1.2. Entering factory Mode: Press up or down key of remote control to select “Auto Calibration”, Press 「OK」

key to enter the item.

-> Source calibration performed automatically, and “OK” info. will pop up after finished.

Repeat step 2 to do VGA input sources, Signal Format : VGA 1024x768@60Hz Instrument (Recommend) : Astro VG-859 / timing PG2 963

8

4-2. Color Temperature Adjustment & Check

4-2.1. Set below items

4-2.2. Press up or down key of remote control to select “Cool”, Press 「ENTER」 key to enter the item. RGAIN, GGAIN, BGAIN, ROFFSET, GOFFSET, BOFFSET, drive values are set for Warm, Normal, and Cool independently.

4-2.3. Adjustment color temperature are min. / typ. / max.

1. Fixed the G Gain and G Offset, adjusts the R Gain, B Gain, R offset, B offset.

2. If R Gain、B Gain and R offset、B offset value are larger the specification, duly change in G Gain or G Offset at a time , after follow adjustment step 1.

4-2.4. Exit Factory Mode:

After finish adjusting color temperature then press [MENU] or [RETURN] to back factory mode. P

ress [EXIT] to exit factory mode.

9

(5) Items of Factory menu

At any input source press the Mute(keep pressing) of Remote control and “Menu” (key pad) to enter factory mode . During Factory menu, if “EXIT” key of Remote control is pushed, system will exit factory mode.

Press the up and down key to move high light item from Color Temperature -> Shipping -> NV Clear-> Full Power

-> Auto Calibration -> RF Burn In -> Debug ->Reset -> SoftWare Update(USB) ->Panel Gamma Control. The NVRAM Clear and Reset to Default items will have a dialog “yes or no” to confirm the action. Press “Enter” key to select high light item function. (Press left and right to adjust value)

1) Factory Color Temp data edit Press up or down key to select high light item function Press enter key to enter the item.

-Color temp default preset No (Warm, Medium, Cool).

-R, G, B data for each preset Press “Up” or “Down” key to select “R”, “G”, “B” item Press “Left” or “Right” key to set the “R”, “G”, “B” value Press “MENU” or “EXIT” item to exit to factory mode

2) Shipping Select the shipping area to “India” then do "Factory Reset " After the actions are done, plug out the AC power.

3) NV CLEAR

Initializes TV setting to default values

- Reset settings: Gamma table, Channel table, Model table (H/V Position, Clock, Phase), Source dependent setting (Contrast, Brightness etc.), Common setting (Volume, Language etc.), OSD ( Picture , Sound , Setup).

This item will have a dialog “yes or no” to confirm the action.

4) Full power This is for power consumption test. 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. Select on/off by left/right key and press Enter key to turn on/off the Full power function.

5) Auto Calibration Source Calibration (gain/offset) must be adjusted by specific pattern, for VGA, Composite and Component input source. This item will have a result dialog “OK” or “NG”.

10

6) RF Burn In Use “snow” pattern for burn in. Selected items are “On” and “Off”. While turn on burn in mode, firmware will automatically turn off “Auto power off” function. If there is no power supply suddenly, firmware will re-enter burn in mode automatically when power

supplied. Pressed the “Power” key (key pad), firmware will automatically turn off burn in mode. Burn in mode: Source is TV.

7) Debug It is for service use only.

8) 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.).

9) Software update (USB) Upgrade firmware through USB.

10) Panel Gamma Control For factory test value of gamma.

11

(6) Performance check

LINE (pixel)

6-1 TV function Connect RF signal, select “auto tuning” to search the channels and mark sure the picture and sound are normally presented after finished.

6-2 AV terminals Input Video signal, make sure the picture and sound are normally presented.

6-3 YPbPr terminal Input YUV signal (VG859 signal generator), listed in table4 and make sure the picture and sound are normally presented.

Table4 YUV signal format

SYNC

POLARITY

LINE

FIELD

MODE

FREQ PERIOD

LINE(kHz)

FRAME

(Hz)

LINE (pixel)

FIELD (lines)

15.734 1716 Negative 27 1440 124 114

59.94Hz 720x480i

31,469 858 Negative 27 720 62 60

59.94Hz 720x480P

45 1650 Positive 74.25 1280 40 220

60Hz 1280x720P 60 750 Positive 720 5 20

50Hz 720x576i 15.734 1716 Negative 27 1440 124 114

59.94 525 Negative 480 3 15

59.94 525 Negative 480 6 30

PIXEL

CLOCK

(MHz)

Display

FRAME

(lines)

SYNC

WIDTH

FRAME

(lines)

BACK

PORCH

FRAME

(lines)

50Hz 720x576P 31.5 858 Negative 27.03 720 62 60

50 525 Negative 480 6 30

50Hz 1920X1080i 33.75 2200 Positive 74.25 1920 44 148

50 1125 Positive 540 5 15

50Hz 1920X1080p

50 1125 Positive 1080 5 15

33.75 2200 Positive 74.25 1920 44 148

60Hz 1920X1080i 60 1125 Positive 1080 5 15

67.5 2200 Positive 148.5 1920 44 148

60Hz 1920X1080P

67.5 2640 Positive 148..5

60 1125 Positive 1080 5 36

1920 44 148

12

6-4 VGA terminal

96 40

2 25

88

4 23

65

6 29

3 38

7 20

Input VGA signal (VG859 signal generator), listed in table5 and check the display and sound. You can select Menu > Setup > PC setup > Auto Adjust to correct the picture deviation if needed.

Table5 VGA signal format

FREQ PERIOD

SYNC

POLARITY

PIXEL

CLOCK

Display

SYNC

WIDTH

BACK

PORCH

Mode

VGA 60Hz

LINE(kHz)

FRAME(Hz)

LINE (pixel)

FIELD(lines)

LINE

FIELD

(MHz)

LINE (pixel)

FRAME(lines)

31.469 800 Negative 25.175 640 96 40

LINE (pixel)

FRAME

(lines)

LINE (pixel)

FRAME

(lines)

640x480 59.941 525 Negative 480 2 25

SVGA 60Hz

37.879 1056 Positive 40 800 128 88

800x600 60.317 628 Positive 600 4 23

XGA 60Hz

1024x768

WXGA 60Hz

1280x768

WXGA 60Hz

1360x768

SXGA 60Hz

1280x1024

48.363 1344 Negative 65 1024 136 160

60.004 806 Negative 768 6 29

47.776 1664 Negative 79.5 1280 128 192

59.87 798 Positive 768 7 20

47.712 1792 Positive 85.5 1360 112 256

60.015 795 Positive 768 6 18

63.981 1688 Positive 108 1280 112 248

60.02 1066 Positive 1024 3 38

6-5 HDMI terminal Input HDMI signal (VG859 signal generator), listed in table6 and make sure the picture and sound are normally presented.

Table6 HDMI signal format

FREQ FREQ PERIOD

MODE

VGA 60Hz 31.469

640x480 59.94

SVGA 60Hz 37.879

800x600 60.317

XGA 60Hz 48.363

1024x768 60.004

SXGA 60Hz 63.981

1280x1024 60.02

WXGA 60Hz 47.776

1280x768 59.87

LINE(kHz)

FRAME(Hz)

LINE (pixel)

FIELD(lines)

800 Negative 25.175 640

525 Negative 480

1056 Positive 40

628 Positive 600

1344 Negative

806 Negative 768

1688 Positive 108

1066 Positive 1024

1664 Negative

798 Positive 768

SYNC

POLARITY

LINE

FIELD

13

PIXEL

CLOCK

(MHz)

79.5

Display

LINE (pixel)

FRAME

(lines)

800

1024

1280

SYNC

WIDTH

LINE (pixel)

FRAME

(lines)

128

136

112

128

BACK

PORCH

LINE (pixel)

FRAME

(lines)

160

248

192

WXGA 60Hz 47.712

6 18

27

3 15

27

62 60

6 30

27

3 15

27

62 60

6 30

40

5 20

40

5 20

44

5 15

44

5 36

44

5 15

44

5 36

44

5 36

44

5 36

1360x768 60.015

59.94Hz 720x480i 15.734

59.94

59.94Hz 720x480P 31.469

59.94

1792 Positive 85.5

795 Positive 768

1716 Negative

525 Negative 480

858 Negative

525 Negative 480

1360

1440

720

112

124

256

114

50Hz 1440x576i 15.625

50

50Hz 1440x576P 31.25

50

60Hz 1280x720P 45

60

50Hz 1280x720P 37.5

50

50Hz 1920X1080i 28.13

50

50Hz 1920X1080P 56.25

50

60Hz 1920X1080i 33.75

60

60Hz 1920X1080P 67.5

60

24Hz 1920x1080P 27

24

30Hz 1920x1080P 33.75

30

1716 Negative

525 Negative 480

858 Negative

525 Negative 576

1650 Positive 74.25

750 Positive 720

1650 Positive 74.25

750 Positive 720

2200 Positive 74.25

1125 Positive 1080

2200 Positive 148.5

1125 Positive 1080

2200 Positive 74.25

1125 Positive 1080

2200 Positive 148.5

1125 Positive 1080

2750 Positive 74.25

1125 Positive 1080

2750 Positive 74.25

1125 Positive 1080

1440

720

1280

1920

124

114

220

148

6-6

other functions check

a) Check the turn on/turn off timer, sleep timer, picture/sound mode, OSD, stereo and analog TV Teletext… etc.

(7) USB Software updated

(1) Plug the USB with the firmware file named SPB42S.bin (2) After system detected SPB42S.bin, USB upgrade message would appear automatically. (3) Press Left key to select Yes, and then press OK key to start the upgrading. (4) When the progress is completed, the TV set will restart automatically.

*USB FW update recovery If firmware update fail, TV system cannot boot up normal, and you can use the following methods to recover (1)When AC power on, the LED will flash red light (2)Put in firmware file("SPB42S.bin ") and plug USB device in the TV set. (3)After burn in bin code, the LED will keep red light (4)When the progress is complete, the TV set will restart automatically.

14

Working principle analysis of the unit

1.

Tuner Antenna signal will be send to tuner SUT-RE216TN, s i g na l to S ca l er a nd

signals flow:

demodulated by it

.

t he n Tu ne r wi ll p ro vi de t he Lo w IF

After processing the signals then output LVDS level drive for panel display and I2S signal to Class-D audio Amplifier for speaker out

2. Composite/Component signal flow Composite signal and Component signal will be fed to MST6100VS to perform video decode, deinterlace and scaler, then output LVDS drive level for panel display. Audio signal from Composite/Component adjust and volume control, the sound signal be formed by

terminal

via matched resistance is fed to MST6100VS to bass

I 2S s ig na l

and provide to Class-D audio

Amplifier for speaker out.

3. PC signal flow PC signal via terminal module to Video decode, display. Sound signal of PC volume control, the sound signal be formed by

socket

te r m i n a l

sent to MST6100VS A/D,

de- interlace and

via matched resistance

PC

output R/G/B of 24 bit to back end

image scale, then send to LVDS level drive for panel

an d

I 2 S si gn al

sent to MST6100VS to bass adjust and

and provide to Class-D audio Amplifier

for speaker out.

4. HDMI signal flow Two HDMI video signals are directly fed to the master control IC MST6100VS to digital decode, image scale, then output LVDS drive level for panel display. HDMI audio signal via decoder built-in MST6100VS to bass adjust and volume control, the sound signal be formed by

I 2S s ig na l

and

provide to Class-D audio Amplifier for speaker out.

5. USB signal flow USB signal via USB connector sent to MST6100VS MST6100

, th en outp ut image scale, then send to LVDS level drive for panel display. Sound signal of USB signal volume control, the sound signal be formed by

and its

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

A/D conversion to

YPb Pr

output

fo r

de-interlace and

vi a

matched resistance

I 2 S si gn al

an d

sent to MST6100VS to bass adjust and

and provide to Class-D audio Amplifier

for speaker out.

15

16

SPB42S 42” Block Diagram

17

SPB42S Block Diagram

4-1 Power Block Diagram

SPB42S:

FSP power board:

18

I. BLOCK

SPB42S 42-inch Wiring Diagram

33

II. Wiring Connection

1

2

3

4

3

5

4

6

7

8

9

10

11

12

13

14

1

15

2

AUO panel

Main board to Panel

SPB42S

DC02L00270I

480 mm

Panel side Main board CN17

FI-RE51S-HF LVDS cable A2006WV0-2X40P

NC NC

LVDS_SEL PURPLE 33 LVDS_SEL

NC NC

Main board to Speaker

SPB42S

DC02V03460I

L:580 & R:955 mm

Main board CN3 Speaker

JWT A2001WV2-4P Color Right

SPK_OUTR+ Red P5 Speaker -

SPK_OUTR- Black P4 Speaker +

SPK_OUTL- White P2 Speaker +

SPK_OUTL+ Green P3 Speaker -

Main board to IR board

SPB42S

DC02V03450I

Left

NC NC

CH1_0- WHITE 27 LVDS_D0O_N

CH1_0+ BLUE 28 LVDS_D0O_P

CH1_1- WHITE 25 LVDS_D1O_N

CH1_1+ ORANGE 26 LVDS_D1O_P

IR board CN1 Main board CN4

JWT A2001WR2-5P Color JWT A2001WR2-5P

LED_C Black 1 LED_C

LED_G Brown 2 LED_G

440 mm

34

16

CH1_2- WHITE 23 LVDS_D2O_N

3

17

4

18

5

19

6

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

LED_R Red 3 LED_R

CH1_2+ GREEN 24 LVDS_D2O_P

GND BLACK 1 GND

CH1_CLK- WHITE 21 LVDS_CO_N

CH1_CLK+ YELLOW 22 LVDS_CO_P

GND BLACK 2 GND

CH1_3- WHITE 19 LVDS_D3O_N

CH1_3+ BROWN 20 LVDS_D3O_P

NC NC

GND BLACK 3 GND

GND BLACK 4 GND

CH2_0- WHITE 15 LVDS_D0E_N

CH2_0+ BLUE 16 LVDS_D0E_P

CH2_1- WHITE 13 LVDS_D1E_N

CH2_1+ ORANGE 14 LVDS_D1E_P

CH2_2- WHITE 11 LVDS_D2E_N

GND Orange 4 GND

IRR Green 5 IRR

VCC5_0_STB Yellow 6 VCC5_0_STB

CH2_2+ GREEN 12 LVDS_D2E_P

GND BROWN 29 GND

CH2_CK- WHITE 9 LVDS_CE_N

CH2_CK+ YELLOW 10 LVDS_CE_P

GND BLACK 30 GND

CH2_3- WHITE 7 LVDS_D3E_N

CH2_3+ BROWN 8 LVDS_D3E_P

NC NC

35

41

NC NC

42

43

44

45

46

47

48

49

50

51

GND BLACK 31

GND BLACK 32

GND BLACK 34

GND BLACK 35

GND BLACK 36

NC NC

Vdd RED 37 LVDS_PWR

Vdd RED 38 LVDS_PWR

Vdd RED 39 LVDS_PWR

Vdd RED 40 LVDS_PWR

36

III.

Wiring Connection(POWER)

37

Trouble shooting

1. Fault clearance

Before calling your dealer or service center for assistance, check the matters below once again. (1) Make sure you have connected LCD TV to your equipment as described in the section

“ CONNECTING LCD TV”.

(2) Check cable connection. Verify that all external equipment and power cord are properly

connected. (3) Verify that all power is switched on. (4) If LCD TV still dose not produce an image, re-start the external equipment. (5) If the image still not appears, unplug LCD TV from the external equipment and check the external

equipment. The problem may be with your graphics controller rather than with LCD TV. (When

you reconnect LCD TV, remember to turn the external equipment and TV off before you power up

LCD TV. Power the equipment back on in order of LCD TV and external equipment.) (6) If the problem still exists, check the following chart.

Problem Try these Solutions NO POWER

Remote Control dose not work

No image

No sound

There are tiny black points and/or bright point on the TV

Abnormal color of image

 Plug this LCD TV into the AC outlet.  Press POWER button on side control or on Remote Control to turn on LCD TV.

 Check POWER Indicator. If this indicator blank, this TV has getting trouble.



Check the batteries.



Make sure nothing is between the Remote Receiver and the Remote Control.



Make sure you are not too far from LCD TV when using Remote Control.



Maximum operating range is 5m.

 Is direct sunlight or strong artificial light shining on LCD TV‘s Infrared Remote

Receiver? Eliminate the light by closing curtains, pointing the light in a different direction, etc.



Check the connection between the external equipment and LCD TV.



When turning LCD TV on, it takes a few seconds to display the image.



Check the system that you select is corresponding with the external equipment

or the video equipment.



Make sure the temperature is not out of the Operating Temperature (0°C ~

50°C).

 Turn off power, then turn on again, re-start LCD TV.



Check Audio cable connection from Audio input source.



Adjust the Sound System.



Press VOLUME (+) button.

 Press MUTE button.



Dark or bright points of light (red, green, or blue) may appear on the screen.

This is a characteristic of the LCD panel, not a malfunction of the LCD TV.



LCD panel is produced with very high accuracy technology. There is 99.99% or

more dot pixel, but there is also 0.01 % or less of dot pixel lack or dot pixel that is constantly lighted. This is not defect.



Regarding LCD panel characteristic, it may occur picture remain (look like a

mirror) when the screen is changed if it displays same screen for a long time. Changing the picture or turn-off the power supply may recover.

 Stripe pattern (more, interference stripes) may show up on the screen depends

on the reflected picture.



Adjust the value of color.



Select different color system.

38

2. Troubleshooting guide

The flow chart shown below will help you to troubleshoot your Televison set with it doesn’t display no

rmally. Each procedure offers a simple way to check for system errors. Before starting, ensure

that there is a signal in and that the Televison is turned on.

2-1 Power LED no light

Power LED no

i

ght

L

Check Pin 10/11 of

02 of Power Board

P8

OK

Check Pin 6 of CN4

OK

Stand-By mode

OK

eck

Ch

Pin 1: Low

Pin 2: High

Pin 3: Low

Check LED

NG

N

NG

Change wer Board

PN: PK101V2920I or PK101V2940I

Change M/Board

G

Change M/Board

Change LED Board

Po

39

2-2 Has audio but no video out

40

2-3 Has video but no audio out

Has image but no

so

und

Check 12V at Pin 3 / 4

P802 of Power Board

of

Make sure the

u

te function is

M

Off

Make sure the

n

put source works

i

normally

Speaker wire

nnects stoutly

co

Un-Mute by

e

mote Controller

R

Change source

Re-connect the wire

Check 12V at

n 3 /4 of CN1

Pi

Change

wer Board

PN: PK101V2920I or PK101V2940I

Po

Change M/Board

41

APPENDIX-B: SPB42 Exploded View

1

37

3

12

30

11

6

33

28

38

28

35

25

38

16

11

7

27

37

20

4

41

5

8

31

39

15

11

2

11

38

40

9

38

26

41

29

34

17

41

39

38

11

36

10

11

13

38

APPENDIX-B: SPC42 Exploded View

14

42

24

23

22

32

21

18

19

9. Replacement Parts List

Safety Ref.No. Part No. Part Name & Description Pcs Remarks

1 TZZ00000151A BEZEL ASY(ASIA-5*/5 1 2 TZZ00000152A BACK COVER ASY(ASIA) 1 3 TZZ00000030A SPK SET(90d)(PIN12d) 2 4 TZZ00000612A H-CON SET 1 5 TZZ00000035A H-CON SET 1 6 TZZ00000036A H-CON SET 1 7 TZZ00000615A H-CON SET 1 8 TZZ00000616A H-CON SET 1

9 TZZ00000042A BOTTOM BRKT 1 10 TZZ00000633A PWR CORD(S) 1 11 TZZ00000086A SCREW 17 12 TZZ00000087A SCREW+WASHER 2 13 TZZ00000090A TAPPING SCREW 2 14 TZZ00000073A PE BAG-TV 1 15 TZZ00000601A FIRMWARE M/B 1 16 TZZ00000598A PCBA IR/B 1 17 TZZ00000111A PWR MODU(SPB42PTA) 1 18 TZZ00000096A STAND ASY 1 19 TZZ00000072A PE BAG-STAND 1 20 TZZ00000605A KEY PLATE ASY(ASIA) 1 21 TZZ00000138A KEY LABEL-32C5D/42U5 1 22 TZZ00000071A ZIPPERED BAG 1 23 TZZ00000654A SCREW+2WASHER 4 24 TZZ00000659A TAPPING SCREW 1 25 TZZ00000041A PANEL BRKT (R) 1 26 TZZ00000097A POWER PCB BRKT 2 27 TZZ00000098A MAIN PCB BRKT 1 28 TZZ00000099A WALL MOUNT BRKT 2 29 TZZ00000043A POWER CABLE SR BRKT 1 30 TZZ00000100A PANEL SUPPORT BM 1 31 TZZ00000051A PCB SPRING 2 32 TZZ00000625A RATING LABEL-42U5D 1 33 TZZ00000102A SPONGE 2 34 TZZ00000159A CR-4305 FOAM+F247 1 35 TZZ00000078A LOCKING CABLE TIE 1 36 TZZ00000109A PST-12 (GIN LIAN) 1 37 TZZ00000079A MYLAR AL TAPE 3 38 TZZ00000082A SCREW 10 39 TZZ00000083A SCREW+LOCK WASHER(8) 7 40 TZZ00000089A TAPPING SCREW 1 41 TZZ00000110A SCREW(NL) 7 42 TZZ00000139A REMO CTRL AAA 1

N/A LCD MODU 1 N/A OWNER'S MANUAL 1 N/A EPS FOAM (T-L) 1 N/A EPS FOAM (T-R) 1 N/A EPS FOAM (B-L) 1 N/A EPS FOAM (B-R) 1 N/A EPS FOAM (B-M) 1 N/A CARTON-TH-L42U5D 1

31

10. Boards Layout

17

Ref No. Board Name Function Remrks

16 PCBA IR/B Remote Receiver, LED 15 FIRMWARE M/B Main Board, Audio & Video Signal Processing 17 PWR MODU Power (AD/DC), DC-DC 20 KEY PLATE ASSY Control Button

All boards are non servicable and should be exchanged for service

15

20

16

32

11 Disassembly and Assembly Instructions

11.1. Stand

1. Lay down the unit so that the rear cover faces upward.

2. Remove the 4 screws.

3. Remove the stand

11.2. Rear cover

1. Remove the total 19 screws.

2.

Remove the rear cover.

11.3. Remove AC cord

1. Remove the bushing of the AC cord from the AC cord bracket.

2. Disconnect the connector (P1) of AC cord.

11.4. P-Board

1. Remove the 6 screws.

2.

Disconnect the connectors (P2, P3).

3. Remove the P-Board.

11.5. M-Board

1. Remove the 3 screws.

2. Disconnect the connectors (P1, P2, P3, P4).

3. Remove the M-Board.

4. Remove the PCB-support.

11.6. Speaker unit

1. Remove the 2 screws.

2.

Remove the speaker units.

11.7. IR-Board

1. Remove the 1 screw.

2. Remove the IR-Board.

11.8. Metal parts I

1. Remove the 11 screws.

2.

Remove the metal parts (m1,m2, m3,m4,m5,m6,m7).

11.9. Metal parts II

1. Remove the 1 screw.

2. Remove the metal part (m8).

11.10. Metal parts III

1. Remove the 1 screw.

2. Remove the metal part (m9).

11.11. Key plate

1. Remove the 2 screws.

2. Remove the key plate.

11.12. LCD Panel

1. Remove the LCD panel.