Panasonic TH-50PF50U Schematic

Order Number MTNC120784CE

B34 Canada: B62

High Definition Plasma Display

Model No. TH-50PF50U

GPF15DMON Chassis

TH-50PF50U

TABLE OF CONTENTS

PAG E 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. Service Hint--------------------------------------------------6

3.2. Applicable signals ------------------------------------------7

4 Specifications ------------------------------------------------------9 5 Service Mode ----------------------------------------------------- 10

5.1. CAT (Computer Aided Test) mode------------------- 10

5.2. IIC mode structure (following items value is sample data)----------------------------------------------- 14

6 Troubleshooting Guide---------------------------------------- 15

6.1. Self Check ------------------------------------------------- 15

6.2. No Power --------------------------------------------------- 17

6.3. No Picture -------------------------------------------------- 17

6.4. Local screen failure -------------------------------------- 18

7 Service Fixture & Tools --------------------------------------- 19

7.1. SC jig -------------------------------------------------------- 19

8 Disassembly and Assembly Instructions --------------- 20

8.1. Removal of Rear Cover--------------------------------- 20

8.2. Removal of Slot Block----------------------------------- 20

8.3. Removal of DS-Board----------------------------------- 20

8.4. Removal of HX-Board----------------------------------- 20

8.5. Removal of A-Board------------------------------------- 21

8.6. Removal of Fan ------------------------------------------- 21

8.7. Removal of P-Board------------------------------------- 22

8.8. Removal of AC Inlet Assy ------------------------------ 22

8.9. Removal of SU-Board and SD-Board --------------- 22

8.10. Removal of SC-Board----------------------------------- 23

8.11. Removal of SS-Board ----------------------------------- 23

8.12. Removal of C1-Board ----------------------------------- 23

8.13. Removal of C2-Board ----------------------------------- 24

8.14. Removal of C3-Board ----------------------------------- 24

8.15. Removal of S1-Board ----------------------------------- 24

8.16. Removal of Front Glass, V1, V2-Board and Cabinet Assy ---------------------------------------------- 24

8.17. Removal of Plasma Display Panel ------------------- 26

9 Measurements and Adjustments -------------------------- 29

9.1. Adjustment ------------------------------------------------- 29

9.2. Adjustment ------------------------------------------------- 30

10 Block Diagram --------------------------------------------------- 35

10.1. Main Block Diagram ------------------------------------ 35

10.2. Block (1 of 6) Diagram ---------------------------------- 36

10.3. Block (2 of 6) Diagram ---------------------------------- 37

10.4. Block (3 of 6) Diagram ---------------------------------- 38

10.5. Block (4 of 6) Diagram ---------------------------------- 39

10.6. Block (5 of 6) Diagram ---------------------------------- 40

10.7. Block (6 of 6) Diagram ---------------------------------- 41

11 Wiring Connection Diagram--------------------------------- 43

11.1. Wiring (1)--------------------------------------------------- 43

11.2. Wiring (2)--------------------------------------------------- 44

11.3. Wiring (3)--------------------------------------------------- 45

12 Schematic Diagram 13 Printed Circuit Board 14 Exploded View and Replacement Parts List

14.1. Exploded View

14.2. Electrical Replacement Parts List

TH-50PF50U

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.

1.1.1. 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 between 1Mohm and 5.2Mohm. When the exposed metal does not have a return path to

the chassis, the reading must be .

Figure 1

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 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.

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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).

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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.

TH-50PF50U

3 Service Navigation

3.1. Service Hint

Board Name Function Board Name Function

A Digital Signal Processor, Microcomputer

Audio Processor, Speaker Out Amplifier Format Converter, Plasma AI Processor Sub-Field Processor, Sync Processor

DS Slot Interface V1 Remote receiver, LED-G, R SC Scan drive V2 Key switch 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.

SS Sustain drive

C1 Data drive (Right) C2 Data drive (Center) C3 Data drive (Left) S1 Power switch

P Power supply

HX PC / RS-232C_Input terminal, 3D Signal out, Speaker

terminal (L, R)

3.2. Applicable signals

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4 Specifications

Power Source 110 - 127 V AC, 50/60 Hz Power Consumption

Rated Power Consumption 480 W Stand-by condition 0.4 W Power off condition 0.2 W

Plasma Display panel Drive method: AC type 50-inch, 16:9 aspect ratio Screen size 43.5 inch (1,105 mm) (W) × 24.4 inch (622 mm) (H) × 49.9 inch (1,268 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) Humidity 20 % - 80 %

Applicable signals

Color System NTSC, PAL, PAL60, SECAM, Modified NTSC Scanning format

PC signals VGA, SVGA, XGA, SXGA

Connection terminals

AV I N

VIDEO BNC 1.0 Vp-p (75-ohm) AUDIO L-R RCA Pin jack × 2 0.5 Vrms, Shared with COMPONENT/RGB IN HDMI TYPE A Connector

COMPONENT / RGB IN

Y / G BNC with sync 1.0 Vp-p (75-ohm) P

B/CB

R/CR

AUDIO L-R RCA Pin jack × 2 0.5 Vrms, Shared with VIDEO

DVI-D IN DVI-D 24 Pin Compliance with DVI Revision 1.0

AUDIO Stereo mini jack (M3) × 1 0.5 Vrms, Shared with PC IN

PC IN High-Density Mini D-sub 15 Pin Y or G with sync 1.0 Vp-p (75-ohm)

AUDIO Stereo mini jack (M3) × 1 0.5 Vrms, Shared with DVI-D IN

SERIAL External Control Terminal

3D IR TRANSMITTER for 3D IR TRANSMITTER (TY-3D30TRW)

WIRELESS MODULE for Wireless module (ET-WM200U) LAN

EXT SP Speaker Terminal 6-ohm, 16 W [8 W + 8 W] (10 % THD)

Accessories Supplied

Remote Control Transmitter N2QAYB000691 Batteries AA Size × 2 Clamper TMME289 × 1 Ferrite core J0KG00000014 × 2

Dimensions (W × H × D) 47.7 inch (1,210 mm) × 28.5 inch (724 mm) × 3.5 inch (89 mm) Mass (weight)

main unit only approx. 72.8 lbs with speakers approx. 83.8 lbs

Note:

• Design and specifications are subject to change without notice. Mass and dimensions shown are approximate.

525 (480) / 60i 60p, 625 (575) / 50i 50p, 750 (720) / 60p 50p, 1125 (1080) /

60i 60p 50i 50p 24p 25p 30p 24sF, 1250 (1080) / 50i

UXGA ..... (compressed)

Horizontal scanning frequency 15 - 110 kHz Vertical scanning frequency 48 - 120 Hz

/B BNC 0.7 Vp-p (75-ohm)

/R BNC 0.7 Vp-p (75-ohm)

Content Protection Compatible with HDCP 1.1

Y or G without sync 0.7 Vp-p (75-ohm) P

/ CB / B:0.7 Vp-p (75-ohm)

/ CR / R:0.7 Vp-p (75-ohm)

HD / VD:1.0 - 5.0 Vp-p (high impedance)

D-sub 9 Pin RS-232C compatible

3D SHUTTER OUT M3 jack × 1 DC 8V OUT Center plus, for EIAJ 4mm plug

RJ45 10BASE-T/100BASE-TX, compatible with PJLink

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5 Service Mode

5.1. CAT (Computer Aided Test) mode

Method A : Main unit + remote control operation

Press and hold the VOL down button / - button on the front panel of the 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. To exit the CAT mode, access the ID mode and switch off the main power.

Method B : Remote control operation only (A different method from old operation)

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.

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 hexadecimal 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. 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.

To exit the NW mode, press the R button on the remote control.

5.1.4. SD mode

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.

To exit the SD mode, press the R button on the remote control.

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5.1.5. 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 42/50PF50 (Japan) 1 42/50PF50U (North America) 2 42/50PF50E (Europe, CIS) 3 42/50PF50W (Asia, Oceania, ME) 5 42/50PF50T (Taiwan)

18 42/50PF50C (China)

Default setting

Number Destination

1 North America

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

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 Plasma display.

2. To get into the Self-check mode, press the volume down button on the customer controls at the bottom of the set, at the same time pressing the OFF-TIMER button on the remote control, and the screen will show.

If the IIC ports have been checked and found to be incorrect Or not located then “ - - ” will appear in place of “ OK ” “ 01 ” in the line of the “ PTCT ” means the number of blinks of the Power LED is 1. (Reference to 6.1.2) “ H09 ” in the line of the “ PTCT ” is the error code.

To exit the CAT mode switch off the main power.

Note:

The line of the “ PTCT ” displays when you get into the Selfcheck mode for the first time only after the Power LED blinks.

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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.

* Refer to 6.1.1 Display Indication

6.2. No Power

First check point There are following 3 states of No Power indication by power LED.

1. No lit.

2. Green is lit then turns red blinking a few seconds later.

3. Only red is lit.

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6.3. No Picture

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6.4. 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 Service Fixture & Tools

7.1. SC jig

Purpose:

To find the failure board (SC or SU/SD) when the power LED is blinking 7 times.

SC jig:

Jumper connector to connect to SC50 connector on SC board

Part number:

TZSC09187

How to use:

Caution: Remove SC jig from SC board after inspection.

1. Remove all connector between SC board and SU/SD board to isolate SC board from both SU and SD board electrically.

Note: The board will be damaged if all connector is not removed (for example; remove connector only for SU board and stay connecting with SD board. The board will be damaged.)

2. Connect SC jig to connector SC50 at left bottom side of SC board.

3. Turn on the TV/Display Unit and confirm the power LED blinking. LED blinking: Possible cause of failure is in SC board No LED blinking (Lighting or no lighting): Possible cause of failure is in SU or SD board

4. After inspection, turn off the TV/Display Unit and wait a few minutes to discharge.

5. Remove SC jig from SC board.

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8 Disassembly and Assem-

bly Instructions

• To disassemble P.C.B., wait for 1 minute after power was off for discharge from electrolysis capacitors.

• , , , , and marks indicate screw positions.

8.1. Removal of Rear Cover

1. Remove screws (17× , ×21 ) and M8 Cap (×4 ) and

then remove the Rear Cover.

3. Remove 6 screws and then remove DS-Board.

8.4. Removal of HX-Board

1. Disconnect the connector (A37).

2. Remove 4 Hexagonal-Head screws, 4 screws ( ) and 1 screw ( ) and 1 screw ( ) and then remove the HXBoard Block.

8.2. Removal of Slot Block

1. Disconnect the connectors (DS13, P9).

2. Remove the flexible cable from the connector (DS1).

3. Remove 4 screws and then remove the Slot Block.

8.3. Removal of DS-Board

1. Remove the Slot Block. (Refer to Removal of Slot Block)

2. Turn over the Slot Block.

3. Turn over the HX-Board Block.

4. Disconnect the connectors (HX1).

5. Remove 2 Hexagonal-Head screws and 2 screw of HXBoard and then remove HX-Board.

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8.5. Removal of A-Board

1. Remove the HX-Board Block. (Refer to Removal of HX-Board)

2. Disconnect the connectors (A5, A11, A13, A16, A22, A25).

3. Remove the flexible cables from the connectors (A1, A20, A31, A32).

4. Remove 4 screws and then remove A-Board.

8.6. Removal of Fan

1. Disconnect the Fan Relay Connectors.

2. Remove 2 screws and then remove the Fan Block (A) and the Clamper.

4. Remove each 4 Sponges (Fan Corner) from the Fan.

5. Reassemble the Fans in reverse order.

6. Stick the Fan Sponges around the Fan.

Note:

The Fan Sponge is not re-usable. Please use a new one when Fan exchange.

7. Disconnect the Fan Relay Connectors.

8. Remove 4 hooks and then remove Duct Barrier (A) Assy, Duct Barrier (B) Assy.

3. Remove each 1 screw and then remove the Fan from the Fan Fixed Metal.

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9. Remove 3 screws and then remove the Fan Block (B).

10. Turn over the Fan Block (B).

11. Remove 4 screws and then remove the fan (D) from the Fan Fixed Metal.

12. Remove 3 Rubbers.

8.8. Removal of AC Inlet Assy

1. Disconnect the connector (P9).

2. Remove 2 screws ( ) and then remove the AC Cord Clamper A.

3. Remove 1 screw ( ) and then remove the AC Inlet Assy.

8.9. Removal of SU-Board and SDBoard

1. Remove the Duct Barrier (A) Assy, Duct Barrier (B) Assy. (Refer to Removal of Fan)

2. Remove the flexible cables from the connectors (SU1, SU2, SU3, SU4, SU5, SU11, SD1, SD2, SD3, SD4, SD5).

8.7. Removal of P-Board

1. Disconnect the connectors (P2, P9, P11, P16, P25, P34, P35).

2. Remove 7 screws and then remove P-Board.

3. Disconnect the connectors (SU41, SD42, SD46).

4. Remove 3 screws ( ).

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5. Remove 4 screws ( ) and then remove SU-Board and SD-Board.

Note: when fixing SU-Board and SD-Board

• Screw on 2 screws (1) firstly.

8.10. Removal of SC-Board

1. Remove the Duct Barrier (A) Assy, Duct Barrier (B) Assy. (Refer to Removal of Fan)

2. Disconnect the connectors (SC2, SD42, SD46, SU41).

3. Remove the flexible cable from the connector (SC20).

4. Remove 7 screws ( ).

5. Remove 4 screws ( ) and then remove SC-Board.

4. Remove 2 screws ( ) and then remove the A-Board Block.

5. Disconnect the connector (SS11).

6. Remove the flexible cables from the connectors (SS33, SS53, SS54, SS56).

7. Remove 7 screws and then remove SS-Board.

8.11. Removal of SS-Board

1. Disconnect the connectors (A5, A11, A13, A16, A22, A25).

2. Remove the flexible cables from the connectors (A1, A20, A31, A32).

3. Remove 2 screws ( ).

8.12. Removal of C1-Board

1. Remove the Slot Block. (Refer to Removal of Slot Block)

2. Remove the Fan Block (A). (Refer to Removal of Fan)

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3. Remove 10 screws and then remove the 2 Hanger Metals and the Stand Pole Bracket Assy (L, R).

4. Remove 15 screws and then remove the Radiator Metal.

5. Remove the flexible cables from the connectors (C10, CB1, CB2, CB3).

6. Remove 3 screws and then remove C1-Board.

4. Remove the flexible cables from the connectors (C31, C33, C36, CB10, CB11, CB12, CB13, CB14, CB15).

5. Remove 4 screws and then remove C3-Board.

8.15. Removal of S1-Board

1. Remove 2 screws (A) and then remove the S1-Board Block.

2. Disconnect the connector (S34).

3. Remove 1 screw (B) and then remove S1-Board.

8.13. Removal of C2-Board

1. Remove the Radiator Metal. (Refer to remove of C1-Board).

2. Remove the flexible cables from the connectors (C20, C21, C26, CB4, CB5, CB6, CB7, CB8, CB9).

3. Remove 4 screws and then remove C2-Board.

8.14. Removal of C3-Board

1. Remove the Radiator Metal. (Refer to remove of C1-Board).

2. Remove the A-Board Block. (Refer to remove of SS-Board).

3. Disconnect the connectors (C35).

8.16. Removal of Front Glass, V1, V2-Board and Cabinet Assy

1. Remove the S1-Board Block. (Refer to Removal of S1-Board)

2. Disconnect the connectors (A11, A22).

3. Remove 9 screws and then remove the Handle Fixing Metal (L, R).

Note: when fixing Handle Fixing Metal (L, R)

• Screw on 2 screws (1) firstly.

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4. Pull the bottom of the Plasma Display Panel forward (arrow1).

5. Slide the Plasma Display Panel and then remove the Plasma Display Panel (arrow2).

8.16.1. Removal of Front Glass

1. Remove 24 screws and then remove the Fixed Angle (left, right, upper-rear, bottom-rear).

2. Remove the Front Glass.

8.16.2. Removal of V1-Board and V2-Board

1. Remove the Front Glass. (Refer to remove of Front Glass).

2. Remove the Fixed Angle (bottom-front).

3. Remove 2 screws (C).

4. Disconnect the connector (V11).

5. Remove 1 hook and then remove V1-Board

6. Remove 2 hooks and then remove the Power Button Shield.

7. Remove 3 hooks and then remove the Power Button and Power Button Spring.

8. Disconnect the connector (V22) and then remove V2Board.

9. Remove 2 hooks and then remove the 5 Key Button from V2-Board.

Note: when fixing Fixed Angle (upper-rear, bottomrear)

• Firstly screw on 6 screws (1-2) in order.

Note: when Front Glass is exchanged

• Paste the Front Glass Sponges in order along each Fixed Angles left and right, upper and bottom.

Note

• The sponges are parts which cannot be recycled. Please use the new article when you exchange the Front Glass.

8.16.3. Removal of Cabinet Assy

1. Remove the Front Glass. (Refer to Removal of Front Glass)

2. Remove V1-Board and V2-Board. (Refer to Removal of V1-Board and V2-Board)

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3. Remove the LED Panel and Photo IC Receive Panel and Remote Sensor Panel.

4. Remove the Rear Cover Hook (Left, Right).

5. Remove the Fixed Angle (upper-front).

6. Remove the Cabinet Assy.

2. Remove 7 screws and then remove P-Board.

3. Disconnect the connectors (A5, A11, A13, A22).

4. Remove the flexible cables from the connectors (A1, A20, A31, C31).

5. Remove 2 screws ( ).

6. Remove 2 screws ( ) and then remove the A-Board Block.

8.17. Removal of Plasma Display Panel

• The C1, C2, C3 Boards are connected with the plasma

display panel for the repair.

• About the enclosed thing for line processing of the

plasma display panel for repair

Although two kinds of enclosed things for line processing are contained in the plasma display for repair for this unit, in this unit, please use the enclosed thing of a white tape and perform line processing. (The enclosed thing of double sided tape is not used)

1. Disconnect the connectors (P2, P9, P11, P16, P25, P34, P35).

7. Remove the flexible cables from the connectors (C33, SS53, SS54, SS56).

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8. Remove 7 screws and then remove SS-Board.

9. Remove 4 screws and then remove the Slot Block.

Duct Barrier (B) Assy.

14. Remove 3 screws and then remove the Fan Block (B).

10. Disconnect the Fan Relay Connectors.

11. Remove 2 screws and then remove the Fan Block (A) and the Duct Barrier (E).

12. Disconnect the Fan Relay Connector.

13. Remove 4 hooks and then remove Duct Barrier (A) Assy,

15. Remove the flexible cables from the connectors (SU1, SU2, SU3, SU4, SU5, SU11, SD1, SD2, SD3, SD4, SD5).

16. Disconnect the connectors (SU41, SD42, SD46).

17. Remove 3 screws ( ).

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18. Remove 4 screws ( ) and then remove SU-Board and SD-Board.

Note: when fixing SU-Board and SD-Board

• Screw on 2 screws (1) firstly.

19. Remove 7 screws and then remove SC-Board.

23. Remove the Duct Barrier (C).

24. Remove 7 screws and then remove the Handle Fixing Metal (L, R).

Note: when fixing Handle Fixing Metal (L, R)

• Screw on 2 screws (1) firstly.

25. Pull the bottom of the Plasma Display Panel forward (arrow1).

26. Slide the Plasma Display Panel and then remove the Plasma Display Panel (arrow2).

20. Disconnect the connector (C35).

21. Remove the flexible cables from the connectors (C10, C20, C21, C26, C36).

22. Remove 2 screws and then remove the S1-Board Block.

27. Remove 12 screws and then remove the 2 Hanger Metals and the Stand Pole Bracket Assy (L, R) and the Hanger Fixing Metal Assy (L, R).

28. Remove 6 screws ( ) and then remove the Attachment Metals (TL, TR, BL, BR).

29. Exchange the Plasma Display Panel.

9 Measurements and Adjustments

9.1. Adjustment

9.1.1. Vsus selection

Caution:

When Plasma panel or A-board is replaced, Vsus should be set to LOW or HIGH.

Procedure

1. Access the CAT mode. Press and hold the Volume down / - button on the front panel of the 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.

2. Select the IIC mode.

3. Go into item [VSUS] in the IIC mode by Up / Down buttons. LOW or HIGH will be displayed.

4. Press [OK] button to go to TEST stage. White pattern without On-Screen Display will be displayed during TEST and CONF stage. Press [RECALL] button to display the On-Screen Display.

5. Press [VOL (-)] button to set to LOW.

6. In LOW setting

a. If no several dead pixel is visible remarkably in white pattern, press [RIGHT] button to go to CONF stage. b. If the several dead pixels are visible remarkably in white pattern, Set to HIGH by press [VOL (+)] button. Press [RIGHT]

button to go to CONF stage if the symptom is improved.

7. Press [OK] button in CONF stage to store LOW or HIGH.

8. Exit Service Mode by pressing [Power] button.

TH-50PF50U

9.2. Adjustment

9.2.1. RGB white balance adjustment

Instrument Name Connect to Setting

• RGB VGA60 W / B pattern

• Color analyzer (Minolta CA-100 or equivalent)

Steps Remarks

[Conditions]

• Make sure the front panel to be used on the final set is fitted.

• Make sure a color signal is not being shown before adjustment.

• Put the color analyzer where there is little color variation.

[Adjustment]

1. Set COMPONET / RGB-IN SELECT to RGB.

2. Select the IIC mode “PANEL W / B Adj.” item.

3. Check that the color temperature is “COOL (Hi)”.

4. Output a white balance pattern.

5. Touch the signal receiver of color analyzer to the highlight window’s center.

6. Fix G drive at FCh and adjust B drive and R drive so x, y become the "Color temperature COOL(Hi)" in the below table. Adjust it again after it lowers of 08h data when the adjustment is NG. ( In addition, adjust it after it lowers by 08h data for NG. )

7. Adjust R/G/B together by multiplication so the maximum drive value in R/G/B becomes FCh with the gain ratio kept. (ALL-DRIVE)

8. Set color temperature to “NORMAL (Mid)”.

9. Fix G drive at FCh and adjust B drive and R drive so the highlight window's x, y becomes the "Color temperature NORMAL(Mid)" in the below table. Adjust it again after it lowers of 08h data when the adjustment is NG. ( In addition, adjust it after it lowers by 08h data for NG. )

10. Adjust R/G/B together by multiplication so the maximum drive value in R/G/B becomes FCh with the gain ratio kept. (ALL-DRIVE)

11. Set color temperature to “WARM (Low)”.

12. Set G drive to FCh and adjust B drive and R drive so the highlight window's x, y become the "Color temperature WARM(Low)" shown in the below table. Adjust it again after it lowers of 08h data when the adjustment is NG. (In addition, adjust it after it lowers by 08h data for NG.)

13. Adjust R/G/B together by multiplication so the maximum drive value in R/G/B becomes FCh with the gain ratio kept. (ALL-DRIVE)

14. Copy the R drive, G drive and B drive data in NTSC, PAL DVI region.

PC IN terminal Panel surface

Picture menu: STANDARD User setting: Normal except PICTURE: max 30

Picture menu: STANDARD User setting: Normal except PICTURE: max 30 Aspect: Full (16 : 9) Position and size: Normal

• “7” key : color temperature select.

• “9” key : Picture menu select.

• Highlight section Signal amplitude 75%

• Drive standard G: FCh

Adjustment target Hi-light: x ± 0.003 y ± 0.003 Hi-light is target of the number at drive adjustment in the hi-light windows. Therefore, it is not target of the hi-light number at after adjustment white balance.

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