Panasonic Viera TX-P42X50B User manual

© Panasonic Corporation 2012.
Unauthorized copying and distribution is a violation
of law.
ORDER NO.PCZ1203060CE
Plasma Television
Model No. TX-P42X50B
GPF15D-E Chassis

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TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions -----------------------------------------------3
1.1. General Guidelines ----------------------------------------3
1.2. Touch-Current Check--------------------------------------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
3.2. Applicable signals------------------------------------------7
4 Specifications ------------------------------------------------------8
5 Service Mode ----------------------------------------------------- 10
5.1. How to enter into Service Mode ---------------------- 10
5.2. Option - Mirror--------------------------------------------- 12
5.3. Service tool mode---------------------------------------- 12
5.4. DRV Check - USBHDD Check------------------------ 13
5.5. Hotel mode------------------------------------------------- 13
5.6. Data Copy by SD Card --------------------------------- 14
6 Troubleshooting Guide---------------------------------------- 17
6.1. Check of the IIC bus lines------------------------------ 17
6.2. Power LED Blinking timing chart --------------------- 18
6.3. No Power--------------------------------------------------- 19
6.4. No Picture-------------------------------------------------- 20
6.5. Local screen failure-------------------------------------- 21
7 Disassembly and Assembly Instructions --------------- 22
7.1. Disassembly Flow Chart for the Unit ---------------- 22
7.2. Disassembly Procedure for the Unit----------------- 23
8 Measurements and Adjustments -------------------------- 27
8.1. Adjustment ------------------------------------------------- 27
9 Block Diagram --------------------------------------------------- 29
9.1. Main Block Diagram ------------------------------------- 29
9.2. Block (1/4) Diagram ------------------------------------- 30
9.3. Block (2/4) Diagram ------------------------------------- 31
9.4. Block (3/4) Diagram ------------------------------------- 32
9.5. Block (4/4) Diagram ------------------------------------- 33
10 Wiring Connection Diagram --------------------------------- 35
10.1. Caution statement.--------------------------------------- 35
10.2. Wiring (1) --------------------------------------------------- 35
10.3. Wiring (2) --------------------------------------------------- 35
10.4. Wiring (3) --------------------------------------------------- 36
11 Schematic Diagram
12 Printed Circuit Board
13 Exploded View

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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 which 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. Touch-Current Check
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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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).

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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
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.

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3 Service Navigation
3.1. PCB Layout
Board Name Function
PSS Power Supply, Sustain Drive
Non serviceable.
PSS-Board should be exchanged for service.
A Main AV input, processing
K Remote receiver, Power LED, C.A.T.S. sensor
C1 Data Driver (Lower Right)
C2 Data Driver (Lower Left)
SN Scan Drive

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3.2. Applicable signals
COMPONENT (Y, PB, PR) (from AV2 terminal), HDMI
* Mark: Applicable input signal
PC (from HDMI terminal)
Applicable input signal for PC is basically compatible to HDMI standard timing.
Note
• Signals other than above may not be displayed properly.
• The above signals are reformatted for optimal viewing on your display.
• PC signal is magnified or compressed for display, so that it may not be possible to show fine detail with sufficient clarity.
Signal name COMPONENT HDMI
525 (480) / 60i, 60p * *
625 (576) / 50i, 50p * *
750 (720) / 60p, 50p * *
1,125 (1,080) / 60i, 50i * *
1,125 (1,080) / 60p, 50p, 24p *
Signal name Horizontal frequency (kHz) Vertical frequency (Hz)
640 ×480 @60 Hz 31.47 60.00
1,280 ×720 @60 Hz 45.00 60.00
1,920 ×1,080 @60 Hz 67.50 60.00

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4 Specifications
QProduct fiche
QOther information
Energy efficiency class B
Visible screen size (diagonal) 107 cm / 42 inches
On mode average power consumption 95 W
Annual energy consumption*1139 kWh
Rated power consumption 150 W
Standby power consumption*20.40 W
Off mode power consumption 0.30 W
Display resolution 1,024 (W) ×768 (H)
Power source AC 220-240 V, 50 / 60 Hz
Panel Plasma panel
Dimensions (W ×H ×D) 1,007 mm ×657 mm ×231 mm (With Pedestal)
1,007 mm ×615 mm ×81 mm (TV only)
Mass 17.5 Net (With Pedestal)
16.0 Net (TV only)
Sound
Speaker (160 mm ×40 mm) ×2, 8 Ω
Audio output 20 W (10 W + 10 W)
Headphones M3 (3.5 mm) stereo mini Jack ×1
Receiving systems / Band name
(UK) DVB-T / T2 Digital terrestrial services.
PAL I UHF E21-68
PAL 525/60 Playback of NTSC tape from some PAL Video recorders (VCR)
or NTSC disc playback from DVD player and recorder.
M.NTSC Playback from M.NTSC Video recorders (VCR).
NTSC (AV input only) Playback from NTSC Video recorders (VCR).
(Ireland)
DVB-T Digital terrestrial services.
PAL I VHF A -J
UHF E21-69
CATV S1 - S20
CATV S21 - S41 (Hyperband)
PAL 525/60 Playback of NTSC tape from some PAL Video recorders (VCR)
or NTSC disc playback from DVD player and recorder.
M.NTSC Playback from M.NTSC Video recorders (VCR).
NTSC (AV input only) Playback from NTSC Video recorders (VCR).
• Check the latest information on the available services at the following website.
http://panasonic.jp/support/global/cs/tv/
Aerial input UHF (UK) VHF / UHF (Ireland)
Operating conditions
Temperature: 0 °C- 35 °C
Humidity: 20 % - 80 % RH (non-condensing)
Connection terminals
AV1 input / output SCART (Audio/Video in, Audio/Video out, RGB in, Q-Link)
AV2 input (COMPONENT /
VIDEO)
VIDEO: RCA PIN Type ×1 1.0 V [p-p] (75 Ω)
AUDIO L-R: RCA PIN Type ×2 0.5 V [rms]
Y: 1.0 V [p-p] (including synchronization)
PB, PR: ±0.35 V [p-p]
HDMI1 / 2 input TYPE A Connectors
HDMI1 : 3D, Content Type, Deep Colour, x.v.Colour™
HDMI2 : 3D, Content Type, Audio Return Channel, Deep Colour,
x.v.Colour™
• This TV supports [ HDAVI Control 5 ] function.
Card slot SD Card slot ×1
Common Interface slot (complies with CI Plus) ×1
ETHERNET RJ45, IEEE802.3 10BASE-T / 100BASE-TX
USB USB2.0 DC 5 V, Max. 500 mA
DIGITAL AUDIO OUT PCM / Dolby Digital / DTS, Fiber optic
*1: Energy consumption XYZ kWh per year, based on the power consumption of the television operating 4 hours per day for 365 days.
The actual energy consumption will depend on how the television is used.
*2: When the TV is turned off with the remote control and no function is active

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Note
• Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate.
• This equipment complies with the EMC standards listed below.
EN55013, EN61000-3-2, EN61000-3-3, EN55020, EN55022, EN55024

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5 Service Mode
5.1. How to enter into Service Mode
5.1.1. Purpose
After exchange parts, check and adjust the contents of adjustment mode.
While pressing [VOLUME ( - )] button of the main unit, press [0] button of the remote control three times within 2 seconds.
5.1.2. 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
[RED] button...All Sub items Selection in reverse direction
[GREEN] button...All Sub items Selection in forward direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )
5.1.3. How to exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.