Panasonic TC-L55WT60 Schematic
ORDER NO.MTNC130369CE
B32 Canada: B61
55 inch Class 1080p LCD HDTV
Model No. TC-L55WT60
LA42 Chassis
© Panasonic Corporation 2013.
Unauthorized copying and distribution is a violation
of law.
TABLE OF CONTENTS
PAG E PAG E
1 Safety Precautions -----------------------------------------------3
1.1. General Guidelines ----------------------------------------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. 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
2
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
0.15F 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
3
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 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).
4
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
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.
's manufacture due to environmental conservation issues. For service and repair work, we'd
5
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
6
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 - 35C)
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
Frequency Range*
Security WPA2-PSK (TKIP/AES)
1
The frequency and channel differ depending on the country.
*
2
802.11b/g/n CH1 ~ CH11 only use for United States and Canada.
*
1,*2
IEEE 802.11a/n:
5.15 GHz - 5.35 GHz, 5.47 GHz - 5.85 GHz
IEEE 802.11b/g/n:
2.400 GHz - 2.4835 GHz
WAP-PSK (TKIP/AES)
WEP (64bit/128bit)
■ 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.
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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.
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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.
9
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.
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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
Switch off the power with the [POWER] button on the
main unit or the [POWER] button on the remote control.
4. Explain the Hotel mode setup menu
Item Function
Mode Select hotel mode On/Off
Input Select input signal modes.
Set the input, when each time power is
switched on.
Selection:
-,RF,HDMI1,HDMI2,HDMI3,AV
• Off: give priority to a last memory.
Channel Select channel when input signal is RF.
Set the channel, each time power is switched
on.
Selection:
Any channel number or [-].
[-] means the channel when turns off.
Volume Adjust the volume when each time power is
switched on.
Range:
0 to 100
Vol. Max Adjust maximum volume.
Range:
0 to 100
OSD Ctrl Restrict the OSD.
Selection:
Off/Pattern1
• Off: No restriction
• Pattern1: restriction
FP Ctrl Select front key conditions.
Selection:
Off/Pattern1/All
• Off: altogether valid.
• Pattern1: only input key is valid.
• All: altogether invalid.
Pow Ctrl Select POWER-On/Off condition when AC
power cord is disconnected and then
connected.
Off: The same condition when AC power
cord is disconnected.
On: Forced power ON condition.
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