Panasonic TH-43 49EX400KST Schematic

ORDER NO. MTV1708112CE

LED TV

Model No. TH-43EX400K

TH-43EX400S TH-43EX400T TH-49EX400K TH-49EX400S TH-49EX400T

Destination : K: Malaysia

S: Singapore T: Thailand

TABLE OF CONTENTS

1 Safety Precautions -----------------------------------------------3

1.1. General Guidelines ----------------------------------------3

1.1.1. Leakage Current Cold Check ----------------------3

1.1.2. Leakage Current Hot Check (See Figure

1.)----------------------------------------------------------3

2Warning--------------------------------------------------------------4

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices ----------4

2.2. About lead free solder (PbF) ----------------------------5

3 Service Navigation------------------------------------------------6

3.1. Service Hint--------------------------------------------------6

4 Specifications ------------------------------------------------------7 5 Test and Alignment -----------------------------------------------9

5.1. Keyboard, IR receiver and Remote Control ---------9

5.1.1. To navigate the Menu using Keyboard -----------9

5.1.2. To navigate the Menu using Remote Control ---------------------------------------------------9

5.2. Video Functional Check ----------------------------------9

5.2.1. PC ---------------------------------------------------------9

5.2.2. YPbPr -------------------------------------------------- 10

5.3. HDMI --------------------------------------------------------10

5.3.1. DVI mode ---------------------------------------------- 10

5.3.2. HDMI mode ------------------------------------------- 10

5.4. RF ------------------------------------------------------------ 11

5.4.1. Analog RF signal input ----------------------------- 11

5.4.2. Digital RF signal input ------------------------------ 11

5.5. CVBS-------------------------------------------------------- 11

5.5.1. CVSBS input------------------------------------------ 11

5.6. ADC Calibration ------------------------------------------ 11

5.6.1. Input Signal Specification ------------------------- 11

5.6.2. Component ADC calibration ---------------------- 12

5.6.3. PC ADC calibration --------------------------------- 12

5.7. Software Upgrade Instruction ------------------------- 13

5.7.1. Keyboard upgrade by USB ----------------------- 13

5.7.2. OSD upgrade by USB ------------------------------ 13

5.7.3. ESN app key upgrade by USB ------------------- 13

5.7.4. HDCP app key upgrade by USB ---------------- 13

5.7.5. HDCP 2.2 app key upgrade by USB ----------- 13

5.7.6. MAC app key upgrade by USB ------------------ 13

6 Troubleshooting Guide---------------------------------------- 14

6.1. Standby LED does NOT turn off. The TV is dead --------------------------------------------------------- 14

6.2. Power on, but LCD backlights are not working or shut down soon --------------------------------------- 15

6.3. Back Light is OK while no video or OSD ----------- 16

6.4. Uncontrolled power off ---------------------------------- 17

6.5. Abnormal picture -----------------------------------------18

6.6. No sound --------------------------------------------------- 19

7 Disassembly and Assembly Instructions --------------- 20

7.1. Back Cover Removal (TH-43EX400) --------------- 20

7.2. Lens and Panel (TH-43EX400) ----------------------- 21

7.3. Boards (TH-43EX400) ---------------------------------- 22

7.4. Speaker (TH-43EX400)--------------------------------- 23

7.5. Key Button Assy (TH-43EX400)---------------------- 24

7.6. FFC Assy (TH-43EX400)------------------------------- 25

7.7. Back Cover Screw (TH-43EX400) ------------------- 26

7.8. Power Boards Assembly (TH-49EX400) ----------- 27

7.9. Main Boards Assembly (TH-49EX400) ------------- 28

PAG E PAG E

7.10. WIFI & Key Button Assembly (TH-49EX400)----- 29

7.11. WIFI & Key Button Installation (TH-49EX400) --- 30

7.12. Speaker & Wire Installation (TH-49EX400) ------- 31

7.13. Key Button (TH-49EX400) ---------------------------- 32

7.14. Speaker & Wire Installation (TH-49EX400) ------- 33

7.15. Back Cover Installation (TH-49EX400)------------- 34

7.16. Label Sticking (TH-49EX400)------------------------- 35

7.17. Handling SPEC------------------------------------------- 36

8 Measurements and Adjustments -------------------------- 37

8.1. Key Check Points---------------------------------------- 37

8.2. Power Flow Diagram------------------------------------ 38

9 Block Diagram --------------------------------------------------- 39

9.1. System Block Diagram --------------------------------- 39

10 Wiring Connection Diagram -------------------------------- 40

10.1. Wire Dressing (TH-43EX400) ------------------------ 40

10.2. Wire Dressing (TH-49EX400) ------------------------ 41

11 Schematic Diagram -------------------------------------------- 42 12 Exploded View and Replacement Parts List----------- 51

12.1. Parts Location (TH-43EX400) ------------------------ 51

12.2. Parts Location (TH-49EX400) ------------------------ 52

12.3. Packing Instruction (TH-43EX400) ------------------ 53

12.4. Packing Instruction (TH-49EX400) ------------------ 55

12.5. Replacement Partlist (TH-43EX400) --------------- 57

12.6. Replacement Partlist (TH-49EX400) --------------- 58

1 Safety Precautions

1.1. General Guidelines

1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

4. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials.

5. When wiring units (with cables, flexible cables or lead wires) are supplied as repair parts and only one wire or some of the wires have been broken or disconnected, do not attempt to repair or re-wire the units. Replace the entire wiring unit instead.

6. When conducting repairs and servicing, do not twist the Faston connectors but plug them straight in or unplug them straight out.

1.1.1. Leakage Current Cold Check

1. Unplug the AC cord and connect a jumper between the two prongs on the plug.

2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be 8.5Mohm to 13Mohm. When the exposed metal does not have a return path to the chassis, the reading must be .

1.1.2. Leakage Current Hot Check (See Figure 1.)

1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.

2. Connect a 1.5kohm, 10 watts resistor, in parallel with a

0.15μF capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1.

3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.

4. Check each exposed metallic part, and measure the voltage at each point.

5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.

6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer.

Figure 1

2Warning

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor [chip] components. The following techniques should be used to help reduce the incidence of component damage caused by electrostatic discharge (ESD).

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as [anti-static (ESD protected)] can generate electrical charge sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.

Caution

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).

2.2. About lead free solder (PbF)

Note: Lead is listed as (Pb) in the periodic table of elements. In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder. The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu). That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.

This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For service and repair work, we’d suggest the use of Pb free solder as well, although Pb solder may be used.

PCBs manufactured using lead free solder will have the PbF within a leaf Symbol PbF stamped on the back of PCB.

Caution

• Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30~40 °C) higher. Please use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C).

• Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C). If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before applying Pb solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.

• After applying PbF solder to double layered boards, please check the component side for excess solder which may flow onto the opposite side. (see figure below)

3 Service Navigation

3.1. Service Hint

Board Name Main Device Remarks

A BOARD Main Board

P BOARD Power Board

IR BOARD Remote, Key

All boards are non-repairable and should be

exchanged for service

4 Specifications

Dimensions (W × H × D) TH-43EX400K 968.9 mm x 614.7 mm x 196.8 mm (With Pedestal)

968.9 mm x 571.7 mm x 79.1 mm (TV only)

TH-43EX400S 968.9 mm x 614.7 mm x 196.8 mm (With Pedestal)

968.9 mm x 571.7 mm x 79.1 mm (TV only)

TH-43EX400T 968.9 mm x 614.7 mm x 196.8 mm (With Pedestal)

TH-49EX400K 1 102.1 mm x 686.9 mm x 223.3 mm (With Pedestal)

TH-49EX400S 1 102.1 mm x 686.9 mm x 223.3 mm (With Pedestal)

TH-49EX400T 1 102.1 mm x 686.9 mm x 223.3 mm (With Pedestal)

Mass TH-43EX400K

TH-43EX400S

TH-43EX400T

TH-49EX400K

TH-49EX400S

TH-49EX400T

Power source AC 100 - 240 V, 50/ 60 Hz Rated power consumption TH-43EX400K 85 W

TH-43EX400S 85 W TH-43EX400T 85 W TH-49EX400K 125 W TH-49EX400S 125 W

TH-49EX400T 125 W Standby power consumption 0.50 W Visible screen size (diagonal) TH-43EX400K 108 cm

TH-43EX400S 108 cm

TH-43EX400T 108 cm

TH-49EX400K 123 cm

TH-49EX400S 123 cm

TH-49EX400T 123 cm Display resolution 3 840 (W) × 2 160 (H) Panel LCD panel (LED backlight) Sound

Audio output 16 W (8 W + 8 W)

Connection terminals

AV I N VI D EO 1×1.0 V[p-p] (VIDEO) AUDIO L - R 0.5 V[rms] HDMI 1 / 2 / 3 input TYPE A Connectors USB USB 2.0/ 3.0 TYPE A Connectors

DC 5V, Max. 500 mA

DC 5V, Max.900 mA

AUDIO OUT 0.5 V[rms]

Receiving systems / Band name 11 SYSTEMS FUNCTION

968.9 mm x 571.7 mm x 79.1 mm (TV only)

1 102.1 mm x 646.7 mm x 80.3 mm (TV only)

7.7 Net (With Pedestal)

7.6 Net (TV only)

7.7 Net (With Pedestal)

7.6 Net (TV only)

7.7 Net (With Pedestal)

7.6 Net (TV only)

11.5 Net (With Pedestal)

11.2 Net (TV only)

11.5 Net (With Pedestal)

11.2 Net (TV only)

11.5 Net (With Pedestal)

11.2 Net (TV only)

1PAL B, G 2PAL I

PAL D , K

4 SECAM B, G 5SECAM D,K

6 NTSC 4.43 7 NTSC 3.58 8

PAL

9 PAL 60 Hz / 5.5 MHz Playback from Special Disc Players and 10 PAL 60 Hz / 6.0 MHz 11 PAL 60 Hz / 6.5 MHz

Reception of broadcast transmissions

Playback from Special VCR’s or DVD

Special VCR’s or DVD

Receiving channels (Analogue TV)

VHF BAND 2 - 12 (PAL / SECAM B, K1)

0 - 12 (PAL B AUST.)

1 - 9 (PAL B N.Z.)

1 - 12 (PAL / SECAM D)

UHF BAND 21 - 69 (PAL G, H, I / SECAM G, K, K1)

28 - 69 (PAL B AUST.) 13 - 57 (PAL D, K)

CATV S1 - S20 (OSCAR)

S21 - S41 (HYPER)

Z1 - Z37 (CHINA)

5A, 9A (AUST.)

Aerial input VHF / UHF Operating Conditions Temperature : 0°C - 45°C

Humidity : 20 % - 80 % RH (non-condensing)

Built-in wireless LAN Standard compliance and Frequency range*

IEEE802.11b/g/n

2.4 GHz -2.5 GHz

Security

WPA2-PSK (TKIP/AES) WPA-PSK (TKIP/AES) WEP (64 bit/128 bit)

Note

• Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate.

5 Test and Alignment

5.1. Keyboard, IR receiver and Remote Control

• Apply 100 - 240 V AC to mains input.

• LED should light up with RED color, when power on, standby LED turn off.

5.1.1. To navigate the Menu using Keyboard

Function Action Observe

To turn on/ off the TV set Press Power key on keyboard Power key equals POWER on remote control.

To enter MENU Screen Press MENU key on keyboard Menu screen should shown at LCD screen.

During Menu Screen Press Menu key Menu key equals RETURN function.

Press Input key Input key equals ENTER function.

Press Vol- key Vol- key equals LEFT key on remote control.

Press Vol+ key Vol+ key equals RIGHT key on remote control.

Press CH- key CH- key equals DOWN key on remote control.

Press CH+ key CH+ key equals UP key on remote control.

5.1.2. To navigate the Menu using Remote Control

Function Action Observe

To enter MENU Screen Press MENU key in remote control Menu screen should shown at LCD screen.

During Menu Screen Press UP key or DOWN key Highlight will goes up and down.

Press RIGHT key or ENTER key User will enter to the selection highlighted.

Press Menu key User will exit from the selection.

5.2. Video Functional Check

5.2.1. PC

• Standard Monitor Format (VESA).

• Connect Video Graphic Adapter (VGA) cable with VESA format to P301 and R/ L to P302 .

• Change the display source to PC.

Test Pattern SMPTE 64-step greyscale

Picture

(Generated by Quantun882) (Generated by Quantun882)

Format

640 x 480 @ 60 Hz 800 x 600 @ 60 Hz 1024 x 768 @ 60 Hz 1360 x 768 @ 60 Hz (High Definition) 1920 x 1080 @ 60 Hz (High Definition)

5.2.2. YPbPr

• Connect Y, Pb, Pr signals to connector Component.

• Change the display source to Component.

Signal Parameter Source Impedance Minimum (Vp-p) Typical (Vp-p) Maximum (Vp-p)

Y : Sync to Peak White

R : Sync to Peak

White

B : Sync to Peak

White

Test Pattern SMPTE RP-133 32-step greyscale

Picture

(Generated by Chroma 22291 or 22293) (Generated by Chroma 22291 or 22293)

Format

4:3 16:9 4:3 16:9

480i @ 59.94 Hz 1080i @ 60 Hz 480i @ 60 Hz

480p @ 59.94 Hz 720p @ 60 Hz 480p @ 60 Hz 1080p @ 60 Hz

75 Ω 0.67 0.7 0.73

75 Ω -±0.30-

5.3. HDMI

5.3.1. DVI mode

• Standard Monitor Format (VESA).

• Connect HDMI cable with HDMI1, and then change the display source to HDMI1.

Test Pattern SMPTE 64-step greyscale

Picture

(Generated by Quantun881) (Generated by Quantun881)

Format

5.3.2. HDMI mode

• Connect HDMI cable with HDMI1, and then change the display source to HDMI1.

Test Pattern SMPTE 64-step greyscale

Picture

640 x 480 @ 60 Hz 800 x 600 @ 60 Hz 1024 x 768 @ 60 Hz 1360 x 768 @ 60 Hz (High Definition)

Format

(Generated by Quantun881)

4:3 16:9

(Generated by Quantun881)

Test Pattern SMPTE 64-step greyscale

5.4. RF

5.4.1. Analog RF signal input

• Connect Antenna cable to tuner.

• Change the display source to TV Channels.

480i @ 60 Hz 1080i @ 60 Hz

480p @ 60 Hz 720p @ 60 Hz/ 1080p @ 60 Hz

Test Pattern

Channel

Picture Frequency

Channel Band VHF-L VHF-H UHF

5.4.2. Digital RF signal input

• Connect Antenna cable to tuner.

• Change the display source to TV Channels.

Test Pattern

Channel

Picture Frequency

Channel Band VHF-L VHF-H UHF

5.5. CVBS

5.5.1. CVSBS input

• Connect AV cable with AV.

• Change the display source to AV.

Test Pattern SMPTE RP-133 32-step greyscale

Picture

Depended on factory Depended on factory Depended on factory

(Generated by Chroma 22291) (Generated by Chroma 22291)

Format NTSC M NTSC M

5.6. ADC Calibration

• In order to have defined conditions for the alignment procedure, the TV set should be warmed up for 30 minutes.

• ADC calibration should be applied just for Component and PC channel.

5.6.1. Input Signal Specification

Specification Component ADC PC ADC

Picture

ADC Mode 720 @ 60 Hz 1024*768 @ 60 Hz

Pattern 100/ 0/ 100/ 0

8 Steps Color bar (100%)

5.6.2. Component ADC calibration

Step for Component ADC calibration:

• Input 100% color bar of 720 @ 60 Hz format to Component source.

• Entry factory menu and choose the ADC menu with the Remote Control.

• Change ADC source to “YUV”.

• Adjust the cursor to “AUTO Color”, press “ENTER”/ “Right” key on the Remote Control.

• If ENTER, ADC “status” item will show “ENTER”.

• If FAIL, do one more time till it shows “ENTER”.

5.6.3. PC ADC calibration

Step for PC ADC calibration:

• Input 100% color bar of 1024*768 @ 60 Hz format to PC source.

• Entry factory menu and choose the ADC menu with the Remote Control.

• Change ADC source to “PC”.

• Adjust the cursor to “AUTO Color”, press “ENTER”/ “Right” key on the Remote Control.

• If ENTER, ADC “status” item will show “ENTER”.

• If FAIL, do one more time till it shows “ENTER”.

5.7. Software Upgrade Instruction

5.7.1. Keyboard upgrade by USB

1. Please put the file to the root path of USB.

2. Plug in USB to TV.

3. Press the power key for about 5s when the TV is powered on. Then, the TV will go to upgrade. When upgrading, the LED indicator will be flashing, and there will be some messages on the screen.

4. After a few minutes, the LED indicator will stop flashing and the system will restart automatically.

5.7.2. OSD upgrade by USB

1. Please put the file to the root path of USB.

2. Plug in USB to TV.

3. Enter Launcher > Setting > Settings > Software upgrade > USB upgrade.

4. When the TV found the upgrade file, please select “ Confirm “. Then TV will going to upgrade and there will be some mes- sages on the screen.

5. After a few minutes, the LED indicator will stop flashing and the system will restart automatically.

5.7.3. ESN app key upgrade by USB

1. Put the key like “TCL-TVS88LXXX.bin” to the root path of USB.

2. Plug in USB to TV.

3. Enter Settings > Picture > Picture mode > User > Contrast > press “1950” in 3s to enter the factory menu.

4. Enter “1-Factory Menu” > “9-USB Update” > “NetflixESN upgrade”.

5. The key will be upgraded.

5.7.4. HDCP app key upgrade by USB

1. Put the key like “hdcp_keyXXX.bin” to the root path of USB.

2. Plug in USB to TV.

3. Enter Settings > Picture > Picture mode > User > Contrast > press “1950” in 3s to enter the factory menu.

4. Enter “1-Factory Menu” > “9-USB Update” > “HDCP upgrade”.

5. The key will be upgraded.

5.7.5. HDCP 2.2 app key upgrade by USB

1. Put the key like “hdcp2_keyXXX.bin” to the root path of USB.

2. Plug in USB to TV.

3. Enter Settings > Picture > Picture mode > User > Contrast > press “1950” in 3s to enter the factory menu.

4. Enter “1-Factory Menu” > “9-USB Update” > “HDCP2 upgrade”.

5. The key will be upgraded.

5.7.6. MAC app key upgrade by USB

1. Put the key like “macXXX.bin” to the root path of USB.

2. Plug in USB to TV.

3. Enter Settings > Picture > Picture mode > User > Contrast > press “1950” in 3s to enter the factory menu.

4. Enter “1-Factory Menu” > “9-USB Update” > “MAC upgrade”.

5. The key will be upgraded.

6 Troubleshooting Guide

These flow charts may not match every single defeat TV set, but they can give you useful advices when you meet the same defeats described on the titles below.

6.1. Standby LED does NOT turn off. The TV is dead

PS : Check fuse and Rectifier Bridge when red LED not turns on when insert AC cord. Sometimes the defect lay on power control unit.

6.2. Power on, but LCD backlights are not working or shut down soon

Mode1 VBL OVP

40 inch 28V 54V

When standby, the light bar voltage is VBL, but the diode in light bar will not transits. The boost circuit will increase the voltage into V-LED, when LED bar is open; the voltage reaches OVP (over voltage protection). When the light bar is short, the voltage is differ- ent and OCP (over current protection) will work, the backlight may shut down soon.

6.3. Back Light is OK while no video or OSD

6.4. Uncontrolled power off

6.5. Abnormal picture

+ 40 hidden pages