Panasonic TH-47LFX6U User manual

© Panasonic Corporation 2013
Unauthorized copying and distribution is a violation
of law.
ORDER NO.ITD1306027CE
B32 Canada: B61
FULL HD LCD Display
Model No. TH-47LFX6U
TH-47LFX6W
LA44 Chassis

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TH-47LFX6U/TH-47LFX6W
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions -----------------------------------------------3
1.1. General Guidelines ----------------------------------------3
1.2. Leakage Current Check (for TH-47LFX6U) ---------3
1.3. Touch-Current Check (for TH-47LFX6W) ------------4
2 Warning --------------------------------------------------------------5
2.1. Prevention of Electrostatic Discharge (ESD)
to Electrostatically Sensitive (ES) Devices ----------5
2.2. About lead free solder (PbF) ----------------------------6
2.3. Precautions for Installation-------------------------------7
3 Service Navigation------------------------------------------------9
3.1. Service Hint--------------------------------------------------9
3.2. Applicable signals ---------------------------------------- 10
4 Specifications ---------------------------------------------------- 11
5 Service Mode ----------------------------------------------------- 12
5.1. CAT (Computer Aided Test) mode ------------------- 12
5.2. IIC mode structure (following items value is
sample data)----------------------------------------------- 17
6 Troubleshooting Guide---------------------------------------- 19
6.1. Self Check ------------------------------------------------- 19
6.2. No Power--------------------------------------------------- 21
6.3. No Picture -------------------------------------------------- 21
7 Disassembly and Assembly Instructions --------------- 22
7.1. SERVICE INSTRUCTIONS --------------------------- 22
7.2. PCB Layout ------------------------------------------------ 23
7.3. Preparation ------------------------------------------------ 24
7.4. About disassembly and replacement --------------- 24
7.5. Rear Plate Removal ------------------------------------- 24
7.6. Attachment Bracket Replacement ------------------- 27
7.7. Fan Cover BTM B Assy and Fan Sponge
Replacement ---------------------------------------------- 27
7.8. Fan Cover BTM C Assy Replacement -------------- 27
7.9. A-Board Replacement ---------------------------------- 28
7.10. P-Board Replacement ---------------------------------- 29
7.11. Key Button and V2-Board Replacement ----------- 29
7.12. Temperature Sensor Board (TS) and Wind
Sensor Replacement ------------------------------------ 30
7.13. Inlet Assy Replacement -------------------------------- 31
7.14. Fan Replacement ---------------------------------------- 31
7.15. DC Fan Replacement ----------------------------------- 32
7.16. Front Frame Assy Replacement --------------------- 32
7.17. Rear Frame Assy Replacement ---------------------- 33
7.18. Rear Frame Assy Removal ---------------------------- 35
7.19. Panel Holder Top Assy Replacement --------------- 36
7.20. Panel Holder Bottom Assy Replacement ---------- 37
7.21. Panel Holder L/R Assy Removal --------------------- 38
7.22. V1-Board Replacement--------------------------------- 39
7.23. LCD Panel Replacement ------------------------------- 39
8 Block Diagram --------------------------------------------------- 43
8.1. Diagram Notes -------------------------------------------- 43
8.2. Main Block Diagram ------------------------------------- 44
8.3. Block (1 of 3) Diagram ---------------------------------- 45
8.4. Block (2 of 3) Diagram ---------------------------------- 46
8.5. Block (3 of 3) Diagram ---------------------------------- 47
9 Wiring Connection Diagram --------------------------------- 49

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1 Safety Precautions
1.1. General Guidelines
1. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials.
2. 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.
3. When conducting repairs and servicing, do not twist the Fasten connectors but plug them straight in or unplug them straight
out.
4. When servicing, observe the original lead dress. If a short circuit is found, replace all parts have been overheated or damaged
by the short circuit.
5. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
6. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.2. Leakage Current Check (for TH-47LFX6U)
1.2.1. 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 between 1Mohm and 5.2Mohm.
When the exposed metal does not have a return path to the chassis, the reading must be .
1.2.2. Leakage Current Hot Check
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

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1.3. Touch-Current Check (for TH-47LFX6W)
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents 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 Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reserve the AC plug in the AC outlet and repeat each of the above measure.
6. The potential at any point (TOUCH CURRENT) expressed as voltage U1and U2, does not exceed the following values:
For a. c.: U1= 35 V (peak) and U2= 0.35 V (peak);
For d. c.: U1= 1.0 V,
Note:
The limit value of U2= 0.35 V (peak) for a. c. and U1= 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and 2.0
mA d. c.
The limit value U1= 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.
7. In case a measurement is out 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

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TH-47LFX6U/TH-47LFX6W
2 Warning
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi-
tive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatically 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 alumi-
num 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 compara-
ble 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 brush-
ing 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).

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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 sol-
der. 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. How-
ever, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.

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2.3. Precautions for Installation

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TH-47LFX6U/TH-47LFX6W
3 Service Navigation
3.1. Service Hint
Board Name Function
P-Board Power supply
Non serviceable.
P-Board should be exchanged for service.
A-Board Digital Signal Processor
Non serviceable.
A-Board should be exchanged for service.
V1-Board Remote receiver, Power LED, C.A.T.S. sensor
Non serviceable.
V1-Board should be exchanged for service.
V2-Board Control panel
Non serviceable.
V2-Board should be exchanged for service.
TS-Board Temperature sensor
Non serviceable.
TS-Board should be exchanged for service.

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3.2. Applicable signals

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4 Specifications
Power Source (U) 110 - 127 V AC, 50/60Hz
Power Source (W) 220 - 240 V AC, 50/60Hz
Power Consumption
Power on 370 W
Power off condition 0.3 W
Stand-by condition 0.5 W
Outdoor mode On: 41 W
Network stand-by mode: 16 W
LCD Display panel 47-inch IPS panel, 16:9 aspect ratio
Screen size 40.9 inch (1,039 mm) (W) ×23.0 inch (584 mm) (H) ×46.9 inch (1,192 mm) (diagonal)
(No. of pixels) 2,073,600 (1,920 (W) ×1,080 (H))
[5,760 ×1,080 dots]
Operating condition
Temperature 32 °F - 104 °F / 0 °C - 40 °C* (during Outdoor mode: -4 °F - 104 °F / -20 °C - 40 °C)
Applicable signals
Scanning format 525 (480) / 60i 60p, 625 (575) / 50i 50p, 750 (720) / 60p 50p, 1125 (1080) /
60i 60p 50i 50p 24p 25p 30p 24sF
PC signals VGA, SVGA, XGA, SXGA
UXGA ..... (compressed)
Horizontal scanning frequency 30 - 110 kHz
Vertical scanning frequency 48 - 120 Hz
Connection terminals
DIGITAL LINK For RJ45 network and DIGITAL LINK connections, compatible with PJLinkTM
Communication method: RJ45 100BaseTX
HDMI TYPE A Connector
DVI-D IN DVI-D 24 Pin Compliance with DVI Revision 1.0
Content Protection Compatible with HDCP 1.1
AUDIO Stereo mini jack (M3) ×1 0.5 Vrms, Shared with PC IN
PC IN High-Density Mini D-sub 15 Pin G with sync 1.0 Vp-p (75-ohm)
G without sync 0.7 Vp-p (75-ohm)
B: 0.7 Vp-p (75-ohm)
R: 0.7 Vp-p (75-ohm)
HD / VD:1.0 - 5.0 Vp-p (high impedance)
AUDIO Stereo mini jack (M3) ×1 0.5 Vrms, Shared with DVI-D IN
SERIAL External Control Terminal
D-sub 9 Pin RS-232C compatible
AUDIO OUT L-R RCA PIN JACK ×2 (L / R)
Output level: Variable (- — 0 dB) [INPUT 1 kHz / 0 dB, 10 k ohm Load]
Accessories Supply
Remote Control Transmitter N2QAYB000691
Batteries (U) AA Size ×2
Batteries (W) R6 (UM3) Size ×2
Dimensions (W ×H ×D) 46 inch (1,162 mm) ×27.8 inch (706 mm) ×8.6 inch (216 mm)
Mass (weight) approx. 109 lbs / 49.5 kg
Notes:
• Design and specifications are subject to change without notice. Mass and dimensions shown are approximate.
• This equipment complies with the EMC standards listed below.
EN55022, EN55024, EN61000-3-2, EN61000-3-3.
• “DIGITAL LINK” is the technology of transmitting signals from images, sounds, etc. with a twisted pair cable, and the original name of our pro-
jector and display.

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TH-47LFX6U/TH-47LFX6W
5 Service Mode
5.1. CAT (Computer Aided Test) mode
How to access the CAT mode
Method A Main unit + remote control operation
1. Remove the AV Cover Top Assy, in order to operate the button of the main unit.
(Refer to step1 in "7.5. Rear Plate Removal" for the method of removing AV Cover Top Assy.)
2. Press and hold the button on the rear side of the main unit and press the RECALL button on the remote control 3 times
quickly within 2 second, this will place the unit into the CAT mode.
Method B Remote control operation only
1. Set the OFF timer except for [0] minute by OFF TIMER button. (30 minutes, 60minutes, 90 minutes)
2. Set the volume level of sound to 0 by VOL down button / -button.
3. Press the RECALL button more than 3 seconds before a volume display disappears.
To exit the CAT mode, turn the power off by the main unit or a remote control.
5.1.1. IIC mode
Select the IIC mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button on
the remote control.
Subject and item are mentioned on “IIC mode structure”.
To exit the IIC mode, press the R button on the remote control.

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5.1.2. CD mode
Select the CD mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on
the remote control more than 3 seconds.
Memory data change
To exit the CD mode, press the R button on the remote control.
About the serial number display
As for the serial number of A-module for repair, a dummy value is displayed.
* By the set for which A-module was exchanged, a serial number is displayed as [-----].
About the history display of SOS for the power supply system
• This unit adds the history display (5 times) of power supply failure to the CD mode as PTCT.
• By the self check of a signal system, only one history is displayed (After a self check disappears). But PTCT displays 5 times of
histories (Abnormality of the latest 3 times, first time and second time after shipment) and after a self check does not disappear.
You can see a detailed history of power failure sometimes.
* About the display contents of PTCT
PTCT : The position of [05] is the first time after shipment.
PTCT : The position of [04] is the second time after shipment.
PTCT : The position of [03] is second from last time.
PTCT : The position of [02] is last time.
PTCT : The position of [01] is the latest.
In [Contents & Check point] of [6.1.2. Power LED Blinking timing chart], the two-digit following PTCT are displayed by a hexadeci-
mal number.
Blinking times Contents & Check point Display contents
ex.1 5 times PTCT 05 H 09 05
ex.2 9 times PTCT 09 H 09 09

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5.1.3. SD mode
Note :
In SD mode, it is posible to display the detection value of each temperature sensor or wind velocity sensor.
Select the SD mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button on
the remote control.
* When not changing each value of Condition, there is a possibility of being out of order.
To exit the SD mode, press the R button on the remote control.
5.1.4. MS mode
Select the MS mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on
the remote control more than 3 seconds.
To exit the MS mode, press the R button on the remote control.
Caution:
Market Select should be set after exchange of A-Board.
Destination number
Number Model (Destination)
0 47LFX6J (Japan)
1 47LFX6U (North America)
3 47LFX6W (Europe, Asia, Oceania, ME, Africa)

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5.1.5. NW mode
Note :
To use the network function, set each "Network Setup" setting and make sure to set the "Control I/F Select" to "LAN".
Select the NW mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button
on the remote control.
5.1.6. ID mode
Select the ID mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on
the remote control more than 3 seconds.
To exit the ID mode, press the R button on the remote control.

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5.1.7. FT mode
Note :
In FT mode, It is possible to check whether FAN and air filter are normal.
1. Select the FT mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute but-
ton on the remote control more than 3 seconds.
2. Eliminate the history information.
Airflow information: Select [RESET] of the “AIRFLOW INFO” display screen and then press Action button.
Fan lock information: Select [RESET] of the “FAN LOCK INFO” display screen and then press Action button.
3. Select [START TEST] and press Action button and perform checking of operations.
• In case of normal, all the present states are displayed as “OK”.
• If “NG” is displayed in the present state, please carry out the following contents.
Clean or replace the filter, or replace the fan.
Then, please carry out checking of operations after eliminating a history in FT mode again, and check that all the present
states are set to “OK”.
To exit the FT mode, press the R button on the remote control.

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5.2. IIC mode structure (following items value is sample data)

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5.2.1. Procedure for performing WS Adj.
1. Select the IIC mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action but-
ton on the remote control.
2. Select the WS Adj. by Up/Down button on the remote control.
3. Press Action button on the remote control.
*1: "Execute" is displayed under "WS Adj." during measurement.
*2: When displayed as "End", it is the end of writing of an initial value.
To exit this mode, press the R button on the remote control.

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6 Troubleshooting Guide
6.1. Self Check
6.1.1. Display Indication
1. Self-check is used to automatically check the bus line controlled circuit of the LCD display.
2. To get into the Self-check mode, press the volume down button on the right side of the unit, at the same time pressing the
OFF-TIMER button on the remote control, and the screen will show.
Method A Self-check only (A shipment setup is not carried out).
• Select the ID mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button
on the remote control more than 3 seconds.
Method B Self-check+Shipment setup
1. Remove the AV Cover Top Assy, in order to operate the button of the unit.
(Refer to step1 in “7.5. Rear Plate Removal” for the method of removing AV Cover Top Assy.)
2. Press and hold the button on the rear side of the unit and press the OFF-TIMER button on the remote control.
If the IIC ports have been checked and found to be incorrect
Or not located then “ - - ” will appear in place of “ OK ”
“ 02 ” in the line of the “ PTCT ” means the number of blinks of the Power LED is 2. (Reference to 6.1.2)
“ H09 ” in the line of the “ PTCT ” is the error code.
To exit the CAT mode, turn the power off by the main unit or a remote control.
Note:
The line of the “ PTCT ” displays when you get into the Self-check mode for the first time only after the Power LED blinks.
6.1.2. Power LED Blinking timing chart
1. Subject
Information of LED Blinking timing chart.
2. Contents
When an abnormality has occurred to the unit, the protection circuit operates and resets to the stand by mode. At this time,
the defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.
• A power supply is not shut off even if this unit detects the abnormalities in a fan.
(About the fault of the fan and the air filter, refer to “6.1.5. About the check at the time of the fault of the fan and the air filter”.)
•*Refer to 6.1.1 Display Indication

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6.1.3. LCD Panel test mode
•Purpose:
To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.
•How to Enter and Exit: There are two procedures as following A and B.
Procedure A:
How to Enter: Remove the AV Cover Top Assy, in order to operate the button of the main unit. (Refer to step1 in “7.5.
Rear Plate Removal” for the method of removing AV Cover Top Assy.)
While pressing [VOLUME ( - )] button of the main unit, press [R] button of the remote control three times within 2 sec-
onds.
How to Exit: Turn off the unit.
Procedure B:
How to Enter: Press [Recall] button of the remote control, then [R] button of the remote control, in turn.
Press finally [N] button of the remote control for over 3 seconds.
How to Exit: The unit automatically turns off after around 10 seconds.
•How to confirm:
Go into LCD Panel test mode by above procedure and then, judge by the following method.
A: Ttest patterns are displayed normally.
Judgment: --- The cause must be in A board.
B: Test pattern is displayed abnormally / Test pattern is not displayed and Power LED lights red and orange alternately.
Judgment: --- The cause must be in LCD Panel or A board.
C: Test pattern is not displayed and Power LED lit green.
Judgment: --- The cause must be in A board.
•Remarks:
The test pattern is created by the circuit in LCD Panel.
In LCD Panel test mode, the test patterns are displayed unaffected by signal processing for RF or input signal.
If the test patterns are displayed, LCD Panel must be okay and the cause of failure must be in A board.
6.1.4. How to check when the image does not appear correctly in DIGITAL LINK
• Check whether all of (A), (B), (C), and (D) are “OK” in NW mode.
• Check whether "H67DLK" is "OK" in ID mode.
• Check being connected with the twisted-pair cable that meets the requirements (refer to the Operating Instructions).
6.1.5. How to check when the fan or the air filter is failure
In the case of the state of the following contents, the fan or the air filter is failure.
• “Filter” is displayed on the screen when you turn on the power.
• Power indicator blinks alternately green and orange.
In this case, in FT mode, please perform the state check of the fan and the air filter, and correspond.