Panasonic TC-L55WT60 Schematic

ORDER NO.MTNC130369CE

B32 Canada: B61

55 inch Class 1080p LCD HDTV

Model No. TC-L55WT60

LA42 Chassis

Unauthorized copying and distribution is a violation of law.

TABLE OF CONTENTS

			PAGE	PAGE
1	Safety Precautions -----------------------------------------------		3
	1.1. General Guidelines ----------------------------------------		3
2	Warning --------------------------------------------------------------		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. PCB Layout--------------------------------------------------		6
4	Specifications ------------------------------------------------------		7
5	Technical Descriptions------------------------------------------		8
	5.1. Specification of KEY for DTCP-IP, WMDRM
	and Widevine------------------------------------------------		8
6	Service Mode -------------------------------------------------------		9
	6.1. How to enter into Service Mode ------------------------		9
	6.2. SRV-TOOL-------------------------------------------------		10
	6.3. Hotel mode-------------------------------------------------		11
	6.4. Data Copy by USB Memory ---------------------------		12
7	Troubleshooting Guide----------------------------------------		15
	7.1. Check of the IIC bus lines------------------------------		15
	7.2. Power LED Blinking timing chart ---------------------		16
	7.3. LCD Panel test mode -----------------------------------		16
8	Disassembly and Assembly Instructions---------------		17
	8.1. Disassembly Flow Chart for the Unit ----------------		17
	8.2. Disassembly Procedure for the Unit-----------------		18
9	Measurements and Adjustments --------------------------		27
	9.1. Voltage chart of P-board--------------------------------		27
	9.2. Voltage chart of	A-board-------------------------------	27
	9.3. Voltage chart of	TC-board-----------------------------	27
10	Block Diagram ---------------------------------------------------		28
	10.1. Main Block Diagram -------------------------------------		28
	10.2. Block (1/2) Diagram -------------------------------------		29
	10.3. Block (2/2) Diagram -------------------------------------		30
11	Wiring Connection Diagram ---------------------------------		31
	11.1. Caution statement.---------------------------------------		31
	11.2. Wiring 1-----------------------------------------------------		31
	11.3. Wiring 2-----------------------------------------------------		32
	11.4. Wiring 3-----------------------------------------------------		33
	11.5. Wiring 3-----------------------------------------------------		34

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 Fasten 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 100 Mohm and over.

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 0.15 F 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

2 Warning

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 ham less 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)

Suggested Pb free solder

There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.

3 Service Navigation

3.1.PCB Layout

Board Name	Function
A-Board	Main
K-Board	IR/LED/AI
P-Board	Power
GK-Board	SW
LD-Board	LED Driver
TC-Board	TCON
LL-Board	Logo LED
LR-Board	Logo LED
LA-Board	Logo LED
LB-Board	Logo LED

4 Specifications

Power Source	AC 110-127 V, 60 Hz
Power Consumption
Rated Power	190 W
Standby Power	0.2 W
Display Panel
Panel System	LCD panel (LED backlight)
Screen size	55 inch class (54.6 inches measured diagonally)
W H Diagonal	47.6 inch 26.7 inch 54.6 inch (1,210 mm 680 mm 1,388 mm)
Number of pixels	1,920 1,080
Speaker Output	18 W [4 W + 4 W + 10 W] ( 10 % THD )
Channel Capability (Digital/Analog) VHF/ UHF: 2 - 69, CATV: 1 - 135
Operating Conditions	Temperature:	32 F - 95 F (0 C - 35 C)
	Humidity:	20 % - 80 % RH (non-condensing)
Connection Terminals
VIDEO IN	RCA PIN (VIDEO, AUDIO-L, AUDIO-R)
COMPONENT IN	RCA PIN (Y, PB, PR, AUDIO-L, AUDIO-R)
HDMI IN 1/2/3	TYPE A Connector (supports [HDAVI Control 5] function)
USB 1/2	USB 2.0 Type A connector	DC 5V, Max. 500mA
DIGITAL AUDIO OUT	PCM / Dolby Digital, Fiber Optic
OTHERS	SD CARD slot, ETHERNET (10BASE-T/100BASE-TX)
Dimensions (W H D)
Including pedestal	48.3 inch 32.1 inch 14.1 inch (1,227 mm 814 mm 358 mm)
TV Set only	48.3 inch 28.2 inch 1.3 inch (1,227 mm 717 mm 32 mm)
Mass
Including pedestal	44.1 lb. (20.0 kg) NET
TV Set only	35.3 lb. (16.0 kg) NET
■Built-in Camera
Lens	F2.0 Lens; FOV (D) 50.9° (in HD mode)
Focus	Fixed focus
Resolution	1280 x 720
■Wireless LAN
Standard Compliance and	IEEE 802.11a/n:
Frequency Range1,2	5.15 GHz - 5.35 GHz, 5.47 GHz - 5.85 GHz
	IEEE 802.11b/g/n:
	2.400 GHz - 2.4835 GHz
Security	WPA2-PSK (TKIP/AES)
	WAP-PSK (TKIP/AES)
	WEP (64bit/128bit)

*1 The frequency and channel differ depending on the country.

*2 802.11b/g/n CH1 ~ CH11 only use for United States and Canada.

■Bluetooth

Standard Compliance	Bluetooth 3.0
Frequency Range	2.402GHz - 2.480 GHz

Note

Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate. Use Panasonic 3D Eyewear supporting passive 3D system technology.

VIERA Touch Pad Controller uses Bluetooth wireless technology.

5 Technical Descriptions

5.1.Specification of KEY for DTCP-IP, WMDRM and Widevine


5.1.1.		General information:
1.	NAND Flash (IC8900) for spare parts has the seed of KEY for each DTCP-IP for DLNA, WMDRM for Netflix and Widevine for
	CinemaNow.
2.	The final KEY data will be generated by Main IC (IC8000) when SELF CHECK was done and are stored in both Main IC
	(IC8000) and NAND Flash (IC8900).
5.1.2.		Replacement of ICs:

When Main IC is replaced, NAND Flash should be also replaced with new one the same time. When NAND Flash is replaced, Main IC is not necessary to be replaced the same time.

After the replacement of IC, SELF CHECK should be done to generate the final KEY data.

How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.

TV will be forced to the factory shipment setting after this SELF CHECK.

6 Service Mode

6.1.How to enter into Service Mode

6.1.1.Purpose/

After exchange parts, check and adjust the contents of adjustment mode.

While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.

Note:

Service Mode can not be entered when 3D signal input. Input 2D signal to enter Service Mode.

6.1.2.Key command

[1]button...Main items Selection in forward direction

[2]button...Main items Selection in reverse direction

[3]button...Sub items Selection in forward direction

[4]button...Sub items Selection in reverse direction

[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )

6.1.3.How to exit

Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

6.1.4.Contents of adjustment mode

•Value is shown as a hexadecimal number.

•Preset value differs depending on models.

•After entering the adjustment mode, take note of the value in each item before starting adjustment.

Main item	Sub item	Sample Data	Remark
ADJUST	CONTRAST	000
	COLOR	3A
	TINT	00
	SUB-BRT	800
	BACKLGT	FFF
	B-Y-G	40
	R-Y-A	00
	V COM	000
WB-ADJ	R-GAIN	80
	G-GAIN	76
	B-GAIN	59
	R-CENT	82
	G-CENT	80
	B-CENT	6D
OPTION	Boot	ROM	Factory Preset.
	STBY-SET	00
	EMERGENCY	ON
	CLK MODE	01
	CLOCK	FFF
	EDID-CLK	HIGH
SRV-TOOL		00	See next.

6.2.SRV-TOOL

6.2.1.How to access

1.Select [SRV-TOOL] in Service Mode.

2.Press [OK] button on the remote control.

6.2.2.Display of SOS History

SOS History (Number of LED blinking) indication.

From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment. This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory shipment setting].

6.2.3.POWER ON TIME/COUNT

Note : To display TIME/COUNT menu, highlight position, then press MUTE for 3 sec.

Time : Cumulative power on time, indicated hour : minute by decimal

Count : Number of ON times by decimal

Note : This indication will not be cleared by either of the self-checks or any other command.

6.2.4.Exit

Disconnect the AC cord from wall outlet or press the [POWER] button on the main unit for 3 seconds to turn off and then turn on automatically.

6.3.Hotel mode

1.Purpose

Restrict a function for hotels.

2.Access command to the Hotel mode setup menu In order to display the Hotel mode setup menu:

While pressing [VOLUME (-)] button of the main unit, press [INPUT] button of the remote control three times within 2 seconds.

Then, the Hotel mode setup menu is displayed.

3.To exit the Hotel mode setup menu