Panasonic TH-50PM50U Service manual

Specifications

ORDER NO. MTNC050951C1

B19 Canada: B05

High Definition Plasma Display

TH-50PM50U

GP8DU Chassis

Power Source AC 120 V, 50/60 Hz Power Consumption

Maximum 515 W

Stand-by condition 0.6 W Plasma Displ ay panel Drive method : AC type 50-inch , 16 : 9 aspect ratio Screen Size (W × H × diagonal) 4335/64’’ (1106 mm) × 2431/64’’ (622 mm) × 4961/64’’(1269 mm) Dimensions (W × H × D) 4931/64’’ (1257 mm) × 323/64’’ (814 mm) × 351/64’’ (96.5 mm) Mass (Weight) 98.11lb. (44.5kg) Sound

Speaker 423/32’’ (120 mm) × 223/64’’ (60 mm) × 2 pcs, 6W

Audio Output 16 W [ 8 W + 8 W ] ( 10 % THD ) FEATURES 3D Y/C FILTER HDMI Accessories Supplied Remote control: EUR646539

F-type antenna adapter (5C-2V × 1) AA Battery × 2 Pedestal AC Cord Cable clamper × 2

Operating Conditions Temperature : 32 °F - 104 °F (0 ° - 40 °C)

Humidity : 20 % - 80 % (non-condensing)

Connection Terminals AV INPUT 1- 2

AV PROG. OUT

IDEO 1.0 Vp-p (75 W) (Phono Jack Type) S-VIDEO Y : 1.0 Vp-p (75 W), C : 0.286 Vp-p (75 W ) (Mini DIN 4-pin)

UDIO L-R 0.5 Vrms (Phono Jack Type × 2)

IDEO 1.0 Vp-p (75 W) (Phono Jack Type)

UDIO L-R 0.5 Vrms

TH-50PM50U

(Phono Jack Type × 2) COMPONENT VIDEO Y 1.0 Vp-p (including synchronization) INPUT1-2 PB / PR ±0.35Vp-p

UDIO L-R 0.5 Vrms

(Phono Jack Type × 2) HDMI HDMI type A Connector

UDIO L-R 0.5 Vrms

(Phono Jack Type × 2)

Note:

Design and Specifications are subject change without notice. Weight and Dimensions shown are approximate.

CONTENTS

Page Page

1 Applicable signals 4 2 Safety Precautions

2.1. General Guidelines

3 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices 4 About lead free solder (PbF) 5 Service Hint 6 Plasma panel replacement method

6.1. Remove the Back cover.

6.2. Remove the P-Board.

6.3. Remove the PB-Board

6.4. Remove the D-Board

6.5. Remove the rear terminal cover

6.6. Remove the metal frame

6.7. Remove the DV-Board

6.8. Remove the DG-Board

6.9. Remove the H-Board

6.10. Remove the PA-Board

6.11. Remove the Z-Board

6.12. Remove the SU-Board

6.13. Remove the SD-Board

6.14. Remove the SC-Board

6.15. Remove the SS2-Board

6.16. Remove the SS3-Board

6.17. Remove the SS-Board

6.18. Remove the Fan

6.19. Remove the C1-Board

6.20. Remove the C2-Board

6.21. Remove the C3-Board

6.22. Remove the Speaker L, R

6.23. Remove the stand brackets.

6.24. Remove the C4-Board

6.25. Remove the C5-Board

6.26. Remove the C6-Board

10 10 10 10 11 11 12 12 12 12 13 13 13 13 14 14 14 14

5 6 7 8

8 8 8 8 9 9 9 9

6.27. Remove the K-Board

6.28. Remove the S-Board

6.29. Remove the Plasma panel section from the Front frame (glass)

6.30. Replace the plasma panel (finished).

7 Location of Lead Wiring

7.1. Lead of Wiring (1)

7.2. Lead of Wiring (2)

7.3. Lead of Wiring (3)

7.4. Lead of Wiring (4)

8 Self-check Function

8.1. How to access

8.2. Power LED Blinking timing chart

8.3. No Power

8.4. No Picture

8.5. Local screen failure

9 Serviceman Mode

9.1. How to enter into Serviceman Mode

9.2. Cancellation

9.3. Contents of adjustment mode

9.4. Option

10 Adjustment Procedure

10.1. Driver Set-up

10.2. Initialization Pulse Adjust

10.3. P.C.B. (Printed Circuit Board) exchange

10.4. Adjustment Volume Location

10.5. Test Point Location

11 Adjustment

11.1. NTSC white balance adjustment

11.2. HD white balance adjustment

11.3. Sub bright adjustment

11.4. ABL operation level adjustment

12 Conductor View

12.1. P-Board

15 15

15 16

17 18 19 20

21 22 23 24 25

26 26 26 27

28 29 30 30 30

31 32 33 33

12.2. PA-Board 38

12.3. PB-Board

12.4. H-Board

12.5. DV-Board

12.6. DG-Board

12.7. Z-Board

12.8. D-Board

12.9. C1-Board

12.10. C2-Board

12.11. C3-Board

12.12. C4-Board

12.13. C5-Board

12.14. C6-Board

12.15. SC-Board

12.16. SU-Board

12.17. SD-Board

12.18. SS, SS2 and SS3-Board

12.19. K and S-Board

13 Block and Sche matic Diagram

13.1. Schematic Diagram Notes

13.2. Main Block Diagram

13.3. P-Board Block Diagram

13.4. P-Board (1 of 2) Schematic Diagram

13.5. P-Board (2 of 2) Schematic Diagram

13.6. PA and PB Board Block Diagram

13.7. PA-Board Schematic Diagram

13.8. PB-Board Schematic Diagram

13.9. H, K, S and Z-Board Block Diagram

13.10. H-Board (1 of 2) Schematic Diagram

13.11. H-Board (2 of 2) Schematic Diagram

13.12. Z-Board Schematic Diagram

13.13. K and S-Board Schematic Diagram

13.14. DV-Board Block Diagram

13.15. DV-Board Schematic Diagram

13.16. DG-Board (1 of 2) Block Diagram

13.17. DG-Board (2 of 2) Block Diagram

13.18. DG-Board (1 of 6) Schematic Diagram

13.19. DG-Board (2 of 6) Schematic Diagram

13.20. DG-Board (3 of 6) Schematic Diagram

13.21. DG-Board (4 of 6) Schematic Diagram

13.22. DG-Board (5 of 6) Schematic Diagram

13.23. DG-Board (6 of 6) Schematic Diagram

13.24. D-Board Block Diagram 39 40 42 43 45 46 49 50 51 52 53 54 55 58 59 60 62

63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85

13.25. D-Board (1 of 6) Schematic Diagram

13.26. D-Board (2 of 6) Schematic Diagram

13.27. D-Board (3 of 6) Schematic Diagram

13.28. D-Board (4 of 6) Schematic Diagram

13.29. D-Board (5 of 6) Schematic Diagram

13.30. D-Board (6 of 6) Schematic Diagram

13.31. C1, C2,C5 and C6-Board Block Diagram

13.32. C3 and C4-Board Block Diagram

13.33. C1-Board (1 of 2) Schematic Diagram

13.34. C1-Board (2 of 2) Schematic Diagram

13.35. C2-Board (1 of 2) Schematic Diagram

13.36. C2-Board (2 of 2) Schematic Diagram

13.37. C3-Board (1 of 2) Schematic Diagram

13.38. C3-Board (2 of 2) Schematic Diagram

13.39. C4-Board (1 of 2) Schematic Diagram

13.40. C4-Board (2 of 2) Schematic Diagram

13.41. C5-Board (1 of 2) Schematic Diagram

13.42. C5-Board (2 of 2) Schematic Diagram

13.43. C6-Board (1 of 2) Schematic Diagram

13.44. C6-Board (2 of 2) Schematic Diagram

13.45. SC-Board Block Diagram

13.46. SC-Board (1 of 2) Schematic Diagram

13.47. SC-Board (2 of 2) Schematic Diagram

13.48. SU-Board Block Diagram

13.49. SU-Board (1 of 2) Schematic Diagram

13.50. SU-Board (2 of 2) Schematic Diagram

13.51. SD-Board Block Diagram

13.52. SD-Board (1 of 2) Schematic Diagram

13.53. SD-Board (2 of 2) Schematic Diagram

13.54. SS, SS2 and SS3-Board Block Diagram

13.55. SS-Board (1 of 2), SS2 and SS3 Schematic Diagram

13.56. SS-Board (2 of 2) Schematic Diagram

14 Parts Locatio n & Mech anica l Replaceme n t Parts List

14.1. Parts Location

14.2. Packing Exploded Views (1)

14.3. Packing Exploded Views (2)

14.4. Packing Exploded Views (3)

14.5. Mechanical Replacement Parts List

15 Elect ri cal Replacement P arts List

15.1. Replacement Parts List Notes

15.2. Electrical Replacement Parts List

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86 87 88 89 90 91 92 93 94 95 96 97 98

99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

119

119 120 121 122 123

125

125 126

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1 Applicable signals

2 Safety Precautions

2.1. General Guidelines

1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

2.1.1. 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 1MW and 5.2MW.

When the exposed metal does not have a return path to

the chassis, the reading must be

Figure 1

2.1.2. 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 1.5kW, 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 ACplugintheAC outlet andrepeateach 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.

TH-50PM50U

3 Prevention of Electro Static 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 electro static 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 alminum 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, alminum 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 hamless 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).

TH-50PM50U

4 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

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.

stamped on the back of PCB.

5 Service Hint

TH-50PM50U

Board Name Function Board Name Function

P Power Supply C1 Data Driver (Up Right) PA DC-DC Converter, Power SOS C2 Data Driver (Up Center) PB Audio Power, Fan Control C3 Data Driver (Up Left)

H AV Terminal, AV Switch C4 Data Driver (Down Left) DT ATSC Interface C5 Data Driver (Down Center) DV HDMI Interface

None serviceable. DV-Board should be exchanged for service.

DG Digital Signal Processor SD Scan out (Down)

Z Speaker out, Audio AMP SS Sustain Drive

D Format Converter, Plasma AI Processor SS2 Sustain Connector (Up)

C6 Data Driver (Down Right) SC Scan Drive SU Scan out (Up)

SS3 Sustain Connector (Down)

K Remote receiver, Keyscan S Power Switch

TH-50PM50U

6 Plasma panel replacement method

6.1. Remove the Back cover.

1. See Service hint (Section 5).

6.2. Remove the P-Board.

Caution:

To remove P.C.B., wait 1 minute after power was off for discharge from electrolisis capacitors.

1. Disconnect the couplers (P2, P5, P9, P10, P11, P12, P23, P25 and P30).

2. Remove the screws (×5

) and remove the P-Board.

6.3. Remove the PB-Board

1. Unlock the cable clampers to free the cable.

2. Disconnect the couplers (PB5, PB7, PB30, PB31, PB32, PB33 and PB34).

3. Remove the screws (×3 metal frame.

4. Remove the screws (× 4

) and remove the PB-Board

) and remove the PB-Board.

6.4. Remove the D-Board

1. Remove the PB-Board.

2. Disconnect the couplers (D3, D5, D20 and D25) and

3. Disconnect the flexible cables (D31, D32, D33 and D34).

4. Remove the screws (×4

) and remove the D-Board.

6.5. Remove the rear terminal cover

1. Remove the screws (×4 ).

2. Remove the screws (×3

3. Remove the screws (×2

4. Remove the screw (×1

5. Remove the rear terminal cover.

). ).

6.7. Remove the DV-Board

1. Unlock the cable clampers to free the cable.

2. Remove the DV-Board unit. (Be careful the couplers (DV15) when remove the DV-

Board unit.)

3. Remove the screws (×1

) and remove the DV-Board.

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6.6. Remove the metal frame

1. Unlock the cable clampers to free the cable.

2. Disconnect the couplers (D3, D5, H7, P10 and PB7) and relay connector (SP-L and SP-R).

3. Remove the screws (×4

) remove the metal frame.

6.8. Remove the DG-Board

1. Unlock the cable clampers to free the cable.

2. Disconnect the couplers (DG3 and DG5).

3. Disconnect the flexible cables (DG1, DG2 and DG20).

4. Remove the screws (×2

) and remove the DG-Board.

TH-50PM50U

6.9. Remove the H-Board

6.11. Remove the Z-Board

1. Unlock the cable clampers to free the cable.

2. Disconnect the coupler (H7).

3. Disconnect the flexible cables (H1, H2, H30 and H50).

4. Remove the screws (×4

) and remove the H-Board.

6.10. Remove the PA-Board

1. Unlock the cable clampers to free the cable.

2. Disconnect the couplers (PA7 and PA10).

3. Disconnect the flexible cables (PA20 and PA30).

4. Remove the screws (×4

) and remove the PA-Board.

1. Unlock the cable clampers to free the cable.

2. Disconnect the coupler (Z2).

3. Disconnect the flexible cable (Z50).

4. Remove the screws (×2

) and remove the Z-Board.

6.12. Remove the SU-Board

1. Remove the screws (×3 ).

2. Slide the SU-Board to the left to disconnect from a coupler (SC41 - SU41) on the SC-Board and remove a coupler (SU45 or SC45).

TH-50PM50U

3. Remove the flexible cables (SU1, SU2, SU3 and SU4) connected to the SU-Board, and remove the SU-Board.

6.13. Remove the SD-Board

3. Remove the flexible cables (SD1, SD2, SD3 and SD4) connected to the SD-Board, and remove the SD-Board.

6.14. Remove the SC-Board

1. Remove the screws (×3 ).

2. Slide the SD-Board to the left to disconnect from a coupler (SC42 - SD42) on the SC-Board and remove a coupler (SD46 or SC46).

1. Disconnect the couplers (SC2, SC20 and SC23)

2. Remove the screws (×9

) and remove the SC-Board.

TH-50PM50U

6.15. Remove the SS2-Board

6.17. Remove the SS-Board

1. Disconnect the coupler (SS23) and disconnect the flexible cable (SS55).

2. Remove the screws (×2

) and remove the SS2-Board.

6.16. Remove the SS3-Board

1. Disconnect the coupler (SS22) and disconnect the flexible cable (SS56).

2. Remove the screws (×2

) and remove the SS3-Board.

1. Remove the SS2-Board and SS3-Board.

2. Disconnect the couplers (SS11, SS12, SS34, SS35, SS42 and SS44).

3. Disconnect the flexible cables (SS51, SS52, SS53 and SS54).

4. Remove the screws (×7

) and remove the SS-Board.

6.18. Remove the Fan

1. Remove the screws (×3 each) remove the fan and disconnect the relay coupler.

6.19. Remove the C1-Board

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6.21. Remove the C3-Board

1. Remove the fan.

2. Remove the flexible cables holder fastening screws (×6 ) and disconnect the flexible cables (CA1, CA2 and

CA3).

3. Disconnect the flexible cable (C10) and disconnect the

coupler (C11).

4. Remove the screw (×5

) and remove the C1-Board.

1. Remove the fan.

2. Remove the flexible cables holder fastening screws (×8 ) and disconnect the flexible cables (CA8, CA9, CA10

and CA11).

3. Disconnect the flexible cable (C31) and disconnect the

couplers (C33 and C35).

4. Remove the screws (×5

) and remove the C3-Board.

6.20. Remove the C2-Board

1. Remove the fan.

2. Remove the flexible cables holder fastening screws (×8 ) and disconnect the flexible cables (CA4, CA5, CA6

and CA7).

3. Disconnect the Flexible cables (C20, C21, C24 and C25)

and disconnect the couplers (C22 and C23).

4. Remove the screws (×5

) and remove the C2-Board.

6.22. Remove the Speaker L, R

1. Remove the screw (×8 ) and disconnect the relay connector L, R.

2. Remove the Speaker L, R.

TH-50PM50U

6.23. Remove the stand brackets.

6.25. Remove the C5-Board

1. Remove the plasma panel section from the servicing stand and lay on a flat surface such as a table (covered), with the plasma panel surface facing downward.

Spread a soft cloth or similar on the table for protection, so the panel surface is not scratched.

2. Remove the stand bracket (left, right) fastening screws (×4 each) and remove the stand brackets (left, right).

6.24. Remove the C4-Board

1. Remove the flexible cables holder fastening screws (×8

) and disconnct the flexible cables (CB8, CB9, CB10

and CB11).

2. Release the speaker cables from clampers.

3. Disconnect the flexible cables (C41) and disconnect the couplers (C42, C43 and C44).

4. Remove the screws (×5

) and remove the C4-Board.

1. Remove the flexible cables holder fastening screws (×8 ) and disconnect hte flexible cables (CB4, CB5, CB6

and CB7).

2. Release the speaker cables from clampers.

3. Disconnect the flexible cables (C50, C51, C54 and C55)

and disconnect the couplers (C52 and C53).

4. Remove the screws (×5

) and remove the C5-Board.

6.26. Remove the C6-Board

1. Remove the flexible cables holder fastening screws (×6 ) and disconnect the flexible cables (CB1, CB2 and

CB3).

2. Release the speaker cables from clampers.

3. Disconnect the flexible cables (C60) and disconnect the

coupler (C61).

4. Remove the screws (×5

) and remove the C6-Board.

6.27. Remove the K-Board

1. Unlock the cable clampers to free the cable.

2. Disconnect the couplers (H7 and SS34).

3. Remove the screws (×3

) and remove the K-Board.

6.28. Remove the S-Board

2. Unlock the cable clampers to free the cable.

3. Disconnect the couplers (S1 and S2).

4. Remove the screws (×2

) and remove the S-Board.

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1. Remove the screw (×2 ) and remove the S-Board unit.

6.29. Remove the Plasma panel section from the Front frame (glass)

1. Remove the front frame and the plasma panel fastening

screw (×8

2. Remove the front frame and the stand brackets fastening

screw (×6

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3. For leaving the plasma panel from the front frame, pull the bottom of the front frame forward, lift, and remove.

6.30. Replace the plasma panel

(finished).

1. Place the new plasma panel (finished) on the flat surface of the table (covered by a soft cloth), with the plasma panel surface facing downward.

2. Attach the C1, C2,C3, C4 and C5-Boardand the C6-Board, connect the flexible cables (×7) from the Plasma panel to the C1, C2, C3, C4 and C5-Board and C2-Board, and fix the flexible cable holders.

3. Attach the Hooks (left, right) and fit the stand brackets (left, right) to the new plasma panel.

4. Place the plasma panel section on the servicing stand.

5. Attach the front frame and the each P.C.Board and so on, to the new plasma panel.

* When fitting the front frame, be careful not to allow any debris, dust or handling residues to remain between the front glass and plasma panel.

7 Location of Lead Wiring

7.1. Lead of Wiring (1)

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7.2. Lead of Wiring (2)

7.3. Lead of Wiring (3)

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7.4. Lead of Wiring (4)

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8 Self-check Function

When symptoms like “the power fails sometimes” or “sometimes there is no picture and/or sound” can not be confirmed at the time of servicing, the self-check function can be used to confirm the occurrence and to find the defective circuit.

In case of “power failure”, flashing of the “POWER” indication (red) at the front of the unit can be used to narrow down the +B line.

8.1. How to access

8.1.1. Access

Produce TV reception screen and, while pressing [VOLUME-] button on the main unit, press [SLEEP] button on the remote controller unit simultaneously.

8.1.2. Exit

Remove the AC cord.

8.1.3. Screen display

Display Ref.No. Description Board SND IC2608 BBE Viva H-Board AVSWV IC2602 Video SW H-Board AVSWA IC2605 Audio SW H-Board ADV IC4018 A/D CONV DG-Board GC4P IC4026 GC4P DG-Board HDMI IC5003 HDMI I/F Reciever DV-Board MEM IC4008 EEPROM DG-Board PANEL IC9003 SUB MICOM D-Board

TH-50PM50U

8.2. 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 blinkes of the Power LED on the front panel of the unit.

3. Remarks Above Fan function is operated during the fans are installed.

8.3. 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 8.2.)

1. No lit

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8.4. No Picture

8.5. 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.

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Fig-1

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9 Serviceman Mode

9.1. How to enter into Serviceman Mode

While pressing [VOLUME- ] button of the main unit, press [RECALL] button of the remote control three times in a row (within 2 seconds).

9.1.1. Adjustment method.....Use the remote control.

“Cursor Up” button...Main items Selection in forward direction “Cursor Down” button...Main items Selection in reverse direction “Cursor Right” button...Sub items Selection in forward direction “Cursor Left” button...Sub items Selection in reverse direction “VOL” button...Value of sub items change in forward direction (

), in reverse direction ( )

9.2. Cancellation

Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

9.3. Contents of adjustment mode

· Value is shown as a hexadecimal number.

· ·

· Preset value differs depending on models.

· ·

· After entering the adjustment mode, take note of the value in each item before starting adjustment.

· ·

Main item Sub item Sample Data

PCT-ADJ PICTUER 11C

COLOR 33 TINT 05 S-BRT 800

WB-ADJ R-CUT 80

G-CUT 80 B-CUT 80 R-DRV DC G-DRV FC B-DRV E9 ALL-CUT 80 ALL-DRV FC SUB-BRT 800 APLMULT

OPTION OPT00 01

EEP COPY ALL

RM-SET CODE A

9.4. Option

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10 Adjustment Procedure

10.1. Driver Set-up

10.1.1. Item / Preparation

1. Input an APL 100 % white signal.

2. Set the picture controls: Picture mode: Normal White balance: Cool Aspect: 16:9

10.1.2. Adjustments

Adjust driver section voltages referring the panel data on the panel data label.

10.2. Initialization Pulse Adjust

1. Input a Cross hatch signal.

2. Set the picture controls: Picture mode: Normal White balance: Cool

Adjust the indicated test point for the specified wave form.

Test point Volume Level Remark T1 TPSC1 (SC) --- 20 ± 15µ Sec T2 TPSS1 (SS) VR6602 (SC) 155 ± 10µ Sec

TH-50PM50U

10.3. P.C.B. (Printed Circuit Board) exchange

10.3.1. Caution

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

10.3.2. Quick adjustment after P.C.B. exchange

P.C.B. Name Test Point Voltage Volume Remarks P Board Vsus TPVSUS (SS) Vsus ± 2V VR351 (P) * SC Board Vad TPVAD (SC) -90V ± 1V VR6801(SC) SS Board Ve TPVE (SS) Ve ± 1V VR6250 (SS) * D, DG Board White blance, Pedestal and Sub brightness for NTSC, PAL, HD, PC and 625i signals

*See the Panel label.

10.4. Adjustment Volume Location

10.5. Test Point Location

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