Panasonic Viera TC-50PX14 User manual

© Panasonic Corporation 2009.
Unauthorized copying and distribution is a violation
of law.
ORDER NO. MTNC090317CE
B34 Canada: B07
50 inch Class 720p Plasma HDTV
Model No. TC-50PX14
GPH12DU Chassis
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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 Faston 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.
1.1.1. 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 metal-
lic cabinet part on the equipment such as screwheads,
connectors, control shafts, etc. When the exposed metal-
lic 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 .
1.1.2. 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 sensi-
tivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the volt-
age 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 measure-
ment 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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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 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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3 Service Navigation
3.1. Service Hint
Board Name Function Board Name Function
P Power Supply C1 Data Driver (Lower Right)
C2 Data Driver (Lower Center)
A DC-DC Converter, Tuner
Speaker out, AV Terminal, AV Switch, PC
Digital Signal Processor, SYSTEM MPU, HDMI Switch
Seine 3LV
Format Converter, Plasma AI, Sub-Field Processor
C3 Data Driver (Lower Left)
SC Scan Drive
SS Sustain Drive
SS2 Sustain out (Lower)
SU Scan out (Upper)
Non-serviceable
SU-Board should be exchanged for service.
SD Scan out (Lower)
Non-serviceable
SD-Board should be exchanged for service.
K Remote receiver, Power LED, C.A.T.S sensor
S Power Switch
GK Key Switch
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3.2. Applicable signals
* Mark: Applicable input signal for Component (Y, PB, PR), HDMI and PC
Note
• Signals other than above may not be displayed properly.
• The above signals are reformatted for optimal viewing on your display.
horizontal frequency (kHz) vertical frequency (Hz) COMPONENT HDMI PC
525 (480) / 60i 15.73 59.94 * *
525 (480) /60p 31.47 59.94 * *
750 (720) /60p 45.00 59.94 * *
1,125 (1,080) /60i 33.75 59.94 * *
1,125 (1,080) /60p 67.43 59.94 *
1,125 (1,080) /60p 67.50 60.00 *
1,125 (1,080) /24p 26.97 23.98 *
1,125 (1,080) /24p 27.00 24.00 *
640 ×400 @70 31.47 70.08 *
640 ×480 @60 31.47 59.94 *
Macintosh13 inch (640 ×480) 35.00 66.67 *
640 ×480 @75 37.50 75.00 *
852 ×480 @60 31.47 59.94 *
800 ×600 @60 37.88 60.32 *
800 ×600 @75 46.88 75.00 *
800 ×600 @85 53.67 85.08 *
Macintosh16 inch (832 ×624) 49.73 74.55 *
1,024 ×768 @60 48.36 60.00 *
1,024 ×768 @70 56.48 70.07 *
1,024 ×768 @75 60.02 75.03 *
1,024 ×768 @85 68.68 85.00 *
Macintosh 21 inch (1,152 ×870) 68.68 75.06 *
1,280 ×1,024 @60 63.98 60.02 *
1,366 ×768 @60 48.36 60.00 *
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4 Specifications
Power Source AC 120 V, 60 Hz
Power Consumption
Maximum 399 W
Standby condition 0.3 W
Plasma Display panel
Drive method AC type
Aspect Ratio 16:9
Visible screen size 50 inch class (49.9 inches measured diagonally)
(W ×H ×Diagonal) 43.5 inch ×24.4 inch ×49.9 inch (1,106 mm ×622 mm ×1,269 mm)
(No. of pixels) 1,049,088 (1,366 (W) ×768 (H))[4,098 ×768 dots]
Sound
Audio Output 20 W [ 10 W + 10 W ] ( 10 % THD )
PC signals VGA, SVGA, XGA, WXGA, SXGA
Horizontal scanning frequency 31 - 69 kHz
Vertical scanning frequency 59 - 86 Hz
Channel Capability (Digital/Analog) VHF/ UHF: 2 - 69, CATV: 1 - 135
Operating Conditions
Temperature: 32 °F - 104 °F (0 °C - 40 °C)
Humidity: 20 % - 80 % RH (non-condensing)
Connection Terminals
VIDEO IN 1 VIDEO: RCA PIN Type ×1 1.0 V [p-p] (75 Ω)
S-VIDEO: Mini DIN 4-pin Y: 1.0 V [p-p] (75 Ω) C: 0.286 V [p-p] (75 Ω)
AUDIO L-R: RCA PIN Type ×2 0.5 V [rms]
VIDEO IN 2 VIDEO: RCA PIN Type ×1 1.0 V [p-p] (75 Ω)
AUDIO L-R: RCA PIN Type ×2 0.5 V [rms]
COMPONENT INPUT 1-2 Y: 1.0 V [p-p] (including synchronization)
PB, PR: ±0.35 V [p-p]
AUDIO L-R: RCA PIN Type ×2 0.5 V [rms]
HDMI 1-2 TYPE A Connector ×2
This TV supports [HDAVI Control 4] function.
PC D-SUB 15PIN: R,G,B / 0.7 V [p-p] (75 Ω)
HD, VD / 1.0 - 5.0 V [p-p] (high impedance)
Card slot SD CARD slot ×1
DIGITAL AUDIO OUT PCM / Dolby Digital, Fiber Optic
FEATURES 3D Y/C FILTER
CLOSED CAPTION V-Chip
Photo Viewer HDAVI Control 4
Dimensions (W ×H ×D)
Including pedestal 48.0 inch ×32.4 inch ×15.3 inch (1,218 mm ×822 mm ×387 mm)
TV Set only 48.0inch ×30.3 inch ×3.8 inch (4.2 inch) (1,218 mm ×769 mm ×94 mm (106mm))
Mass
Including pedestal 79.4 lb. (36.0 kg)
TV Set only 75.0 lb. (34.0 kg)
Note
• Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate.
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5 Service Mode
5.1. How to enter into Service Mode
While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.
5.1.1. 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 ( - )
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5.1.2. 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.
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.
Main item Sub item Sample Data Remark
ADJUST CONTRAST 46
COLOR 00
TINT 00
SUB-BRT 000
WB-ADJ R-CUT 80
G-CUT 80
B-CUT 80
R-DRV FC
G-DRV FF
B-DRV E8
ALL-CUT 80
ALL-DRV FC
OPTION BOOT ROM Factory Preset
STBY-SET - -
EMERGENCY ON
CLK MODE 00
CLOCK 000
AGING RGBW
VERTICAL LINE
COUNT
ALL WHITE
ALL RED
ALL GREEN
ALL BLUE
ON/OFF
RAMP WHITE
RAMP RED
RAMP GREEN
RAMP BLUE
1% WINDOW
COLOR BAR
A-ZONE B-ZONE/4 TRIO
SCROLL
WHITE FLAME
LOW SETUP RED
LOW SETUP GREEN
LOW SETUP BLUE
RM-SET CODE A Fixed
SRV-TOOL - See next
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5.2. Service tool mode
5.2.1. How to access
1. Select [SRV-TOOL] in Service Mode.
2. Press [OK] button on the remote control.
5.2.2. 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 ship-
ment setting].
5.2.3. POWER ON TIME/COUNT
Note : To display TIME/COUNT menu, highlight position, then press MUTE for (3sec).
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.
5.2.4. Exit
1. Disconnect the AC cord from wall outlet.
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5.3. 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, please
enter the following command (within 2 second).
[TV] : Vol. [Down] + [REMOTE] : INPUT (3 times)
Then, the Hotel mode setup menu is displayed.
3. To exit the Hotel mode setup menu
Disconnect AC power cord from wall outlet.
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:
-/ANTENNA/COMP1/COMP2/HDMI1/
HDMI2/VIDEO1/VIDEO2/PC
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/All/Pattern1
• Off: altogether valid.
• All: altogether invalid.
• Pattern: only input key is valid.
Pow Ctrl Select POWER-ON/OFF condition when AC
power cord is disconnected and then con-
nected.
OFF: The same condition when AC power
cord is disconnected.
ON: Forced power ON condition.
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6 Troubleshooting Guide
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
6.1. Check of the IIC bus lines
6.1.1. How to access
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control
for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote con-
trol for more than 3 seconds.
6.1.2. Exit
Disconnect the AC cord from wall outlet.
6.1.3. Screen display
6.1.4. Check Point
Confirm the following parts if NG was displayed.
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6.2. Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an abnormality has occurred the unit, the protection circuit operates and reset 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.
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6.3. No Power
First check point
There are following 2 states of No Power indication by power LED.
1. No lit
2. Red is lit then turns red blinking a few seconds later. (See 6.2.)
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6.4. No Picture
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6.5. Local screen failure
Plasma display may have local area failure on the screen. Fig-1 is the possible defect P.C.B. for each local area.
Fig-1
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7 Disassembly and Assembly Instructions
7.1. Remove the Rear cover
1. See Service Hint (Section 3)
7.2. Remove the P-Board
Caution:
To remove P.C.B. wait 1 minute after power was off for dis-
charge from electrolysis capacitors.
1. Unlock the cable clampers to free the cable
2. Disconnect the connectors (P2, P6, P7, P9, P11, P25 and
P35).
3. Remove the screws (×9 ) and remove the P-Board.
7.3. Remove the Side terminal
cover and Rear terminal cover
1. Remove the claw (×1 ).
2. Remove the Side terminal cover.
3. Remove the Adjustment cover.
4. Remove the screws (×4 , ×3 , ×1 ).
5. Remove the Rear terminal cover.
7.4. Remove the Tuner unit
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (A1, A6 A11, A12 and A25).
3. Disconnect the flexible cables (A20, A31 and A32).
4. Remove the screws (×2 ) and remove the Tuner unit.
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7.5. Remove the A-Board
1. Remove the Tuner unit. (See section 7.4.)
2. Remove the screws (×4 ) and remove the A-Board.
7.6. Remove the Speakers
1. Unlock the cable clampers to free the cable.
2. Disconnect the relay connector.
3. Remove the screws (×2 ) and remove the Speaker R.
4. Disconnect the connector (A12). (See section 7.4.)
5. Remove the screws (×2 ) and remove the Speaker L.
7.7. Remove the Control button unit
1. Disconnect the connector (C14).
2. Remove the screws (×2 ).
3. Remove the Control button unit.
7.8. Remove the GK-Board
1. Remove the Control button unit. (See section 7.7.)
2. Remove the screws (×2 ).
3. Remove the GK-Board MTG. metal.
4. Remove the claw (×3 ).
5. Disconnect the connector (GK1).
6. Remove the GK-Board from Control button.
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7.9. Remove the SU-Board
1. Remove the flexible cables (SU1B, SU2B, SU3B and
SU4B) connected to the SU-Board.
2. Remove the flexible cable (SU11-SD11) and the bridge
connector (SC41-SU41).
3. Remove the molding prop (×1 ).
4. Remove the screws (×2 , ×2 ) and remove the SU-
Board.
7.10. Remove the SD-Board
1. Remove the Control button unit. (See section 7.7.)
2. Remove the flexible cables (SD1B, SD2B, SD3B and
SD4B) connected to the SD-Board.
3. Remove the flexible cable (SU11-SD11) and the bridge
connectors (SC42-SD42 and SC46-SD46).
4. Remove the molding prop (×1 ).
5. Remove the screws (×2 , ×2 ) and remove the SD-
Board.
7.11. Remove the SC-Board
1. Remove the SU-Board and SD-Board. (See section 7.9.
and 7.10.)
2. Unlock the cable clampers to free the cable.
3. Disconnect the connectors (SC2 and SC3).
4. Disconnect the flexible cable (SC20).
5. Remove the screws (×6 ) and remove the SC-Board.
7.12. Remove the SS2-Board
1. Remove the Tuner unit. (See section 7.4.)
2. Disconnect the bridge connector (SS22-SS24) and dis-
connect the flexible cable (SS58).
3. Remove the screws (×2 ) and remove the SS2-Board.
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7.13. Remove the SS-Board
1. Remove the Tuner unit. (See section 7.4.)
2. Unlock the cable clampers to free the cable.
3. Disconnect the connectors (SS3, SS11 and SS23).
4. Disconnect the flexible cables (SS52 and SS55).
5. Disconnect the bridge connector (SS22-SS24).
6. Remove the screws (×5 ) and remove the SS-Board.
7.14. Remove the Hanger metals and
the Stand brackets
1. Remove the Plasma panel section from the servicing
stand and lay on a flat surface such as a table (covered
by a soft cloth) with the Plasma panel surface facing
downward.
2. Remove the Hanger metals (L, R) fastening screws (×4
each) and remove the Hanger metals (L, R).
3. Remove the Stand brackets (L, R) fastening screws (×4
each) and remove the Stand bracket metals (L, R)
and the Stand brackets (L, R).
7.15. Remove the C1-Board
1. Remove the Control button unit. (See section 7.7.)
2. Remove the flexible cables holder fastening screws (×6
).
3. Disconnect the flexible cables (CB1, CB2 and CB3).
4. Disconnect the flexible cable (C10).
5. Disconnect the connector (C14).
6. Remove the screws (×3 ) and remove the C1-Board.
7.16. Remove the C2-Board
1. Remove the Hanger metal R and the Stand bracket R.
(See section 7.14.)
2. Remove the flexible cables holder fastening screws (×8
).
3. Disconnect the flexible cables (CB4, CB5, CB6 and CB7).
4. Disconnect the flexible cables (C20, C21 and C22).
5. Remove the screws (×4 ) and remove the C2-Board.
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