Panasonic TH-42PE7U Service manual

High Definition Plasma Television

GP10DHU Chassis

Specifications

PowerSource PowerConsumption

Maximum 387 W Standby condition 0.2 W

Plasma Displaypanel

Drive method Aspect Ratio 16 : 9

isible screen size (W × H × Diagonal) (No. of pixels)

Sound

Audio Output 16 W [8 W + 8 W] (10 % THD)

Channel Capability (Digital/Analog) VHF/UHF: 2 - 69, CATV: 1 - 135 Operating Conditions Temperature: 32 °F - 104 °F (0 °C - 40 °C)

Connection Terminals

INPUT 1-2 VIDEO: RCA PIN Type × 1 1.0 V [p-p] (75 ohm)

COMPONENTVIDEO INPUT 1-2

HDMI 1-2 AUDIO IN TYPE A Connector×2

AVPROG. OUT VIDEO: RCA PIN Type × 1 1.0 V [p-p] (75 ohm)

DIGITAL AUDIO OUT PCM/DolbyDigital, FiberOptic

FEATURES 3D Y/C FILTER V-Chip

Dimensions (W × H × D)

C 120 V, 60 Hz

C type

42” (Diagonal)

36.3 ” × 20.4 ” × 41.6 ” (920 mm × 518 mm × 1,056 mm) 786,432 (1,024 (W) × 768 (H)) [3,072 × 768 dots]

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

S-VIDEO: Mini DIN 4-pin Y: 1.0 V [p-p] (75 ohm) C: 0.286 V [p-p] (75 ohm)

UDIO 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]

UDIO L-R: RCA PIN Type × 2 0.5 V [rms]

CLOSED CAPTION HDAVI Control 2

ORDER NO.MTNC070940CE

B34 Canada: B07

TH-42PE7U

Including pedestal 40.2 ” × 29.6 ” × 12.6 ” (1,020 mm × 750 mm × 320 mm) TV Set only 40.2 ” × 27.8 ” × 3.8 ” (1,020 mm × 704 mm × 95 mm)

Weight

Including pedestal 64.0 lb. (29 kg) TV Set only 59.6 lb. (27 kg)

Note:

· Design and Specifications are subject to 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 Electrostatic 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 rear cover

6.2. Remove the rear terminal cover

6.3. Remove the P-Board

6.4. Remove the Tuner unit

6.5. Remove the A-Board

6.6. Remove the D-Board

6.7. Remove the SU-Board

6.8. Remove the SD-Board

6.9. Remove the SC-Board

6.10. Remove the SS-Board

6.11. Remove the C1-Board

6.12. Remove the C2-Board

6.13. Remove the speaker L, R

6.14. Remove the stand brackets

6.15. Remove the S-Board

6.16. Remove the K-Board

6.17. Remove the Plasma panel section from the Cabinet assy (glass)

6.18. Replace the plasma panel (finished)

7 Caution statement

7.1. Caution statement.

8 Location of Lead Wiring

8.1. Lead of Wiring (1)

8.2. Lead of Wiring (2)

8.3. Lead of Wiring (3)

8.4. Lead of Wiring (4)

8.5. Lead of Wiring (5)

9 Self-check Function

9.1. Check of the IIC bus lines

9.2. Power LED Blinking timing chart

10 10 10 10 11 11 11 11 11 12 12

12 13

15 16 17 18 19

20 21

6 7 8 9

9 9 9 9 9

9.3. No Power

9.4. No Picture

9.5. Local screen failure

10 Service Mode

10.1. How to enter into Service Mode

10.2. Service tool mode

11 Adjustment Procedure

11.1. Driver Set-up

11.2. Initialization Pulse Adjust

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

11.4. Adjustment Volume Location

11.5. Test Point Location

12 Adjustment

12.1. White balance adjustment

13 Hotel mode 14 Conductor Views

14.1. P-Board

14.2. GS, K and S-Board

14.3. A-Board

14.4. D-Board

14.5. C1-Board

14.6. C2-Board

14.7. SC-Board

14.8. SU-Board

14.9. SD-Board

14.10. SS-Board

15 Sche matic and Block Diagr am

15.1. Schematic Diagram Note

15.2. Main Block Diagram

15.3. P-Board Block Diagram

15.4. P-Board (1 of 6) Schematic Diagram

15.5. P-Board (2 of 6) Schematic Diagram

15.6. P-Board (3 of 6) Schematic Diagram

15.7. P-Board (4 of 6) Schematic Diagram

15.8. P-Board (5 of 6) Schematic Diagram

15.9. P-Board (6 of 6) Schematic Diagram

15.10. GS, K and S-Board Block and Schematic Diagram

15.11. A-Board (1 of 5) Block Diagram

22 23 24

25 27

28 29 29 30 30

33 35

35 38 39 42 44 45 46 49 50 51

53 54 55 56 57 58 59 60 61 62 63

15.12. A-Board (2 of 5) Block Diagram 64

15.13. A-Board (3 of 5) Block Diagram

15.14. A-Board (4 of 5) Block Diagram

15.15. A-Board (5 of 5) Block Diagram

15.16. A-Board (1 of 12) Schematic Diagram

15.17. A-Board (2 of 12) Schematic Diagram

15.18. A-Board (3 of 12) Schematic Diagram

15.19. A-Board (4 of 12) Schematic Diagram

15.20. A-Board (5 of 12) Schematic Diagram

15.21. A-Board (6 of 12) Schematic Diagram

15.22. A-Board (7 of 12) Schematic Diagram

15.23. A-Board (8 of 12) Schematic Diagram

15.24. A-Board (9 of 12) Schematic Diagram

15.25. A-Board (10 of 12) Schematic Diagram

15.26. A-Board (11 of 12) Schematic Diagram

15.27. A-Board (12 of 12) Schematic Diagram

15.28. D-Board Block Diagram

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

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

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

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

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

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

65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86

15.35. C1 and C2-Board Block Diagram

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

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

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

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

15.40. SC, SU and SD-Board Block Diagram

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

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

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

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

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

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

15.47. SS-Board Block Diagram

15.48. SS-Board (1 of 2) Schematic Diagram

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

16 Explo ded Views & Replacement Parts List

16.1. Exploded Views

16.2. Packing Exploded Views (Accessories box)

16.3. Packing Exploded Views (Stand)

16.4. Replacement Parts List Notes

16.5. Mechanical Replacement Parts List (PDP TV)

16.6. Mechanical Replacement Parts List (Stand)

16.7. Electrical Replacement Parts List

TH-42PE7U

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

99 100 101

103

103 104 105 106 107 108 109

TH-42PE7U

1 Applicable signals

TH-42PE7U

2 Safety Precautions

2.1. 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 wireor 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 plugthem straight in orunplug them straightout.

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.

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 1Mohm and 5.2Mohm.

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 1.5kohm, 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 ACplugintheACoutlet and repeat eachof 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-42PE7U

3 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 ESdevices.(Otherwiseham less motion suchasthebrushing 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-42PE7U

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 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-42PE7U

5 Service Hint

Remove the Rear Cover

Board Name Function Board Name Function

P Power Supply D Format Converter, Plasma AI, Sub-Field Processor A DC-DC Converter

Speaker out, Sound Processor AV Terminal, AV Switch Digital Signal Processor, Microcomputer HDMI Interface, Peaks Lite 2

K Remote receiver, Power LED, Key Switch SS Sustain Drive S Power Switch

C1 Data Driver (Lower Right) C2 Data Driver (Lower Left) SC Scan Drive SU Scan out (Upper) SD Scan out (Lower)

6 Plasma panel replacement method

TH-42PE7U

6.1. Remove the rear cover

1. See Service Hint (Section 5)

6.2. Remove the rear terminal cover

1. Remove the screws (×6 ,×7 ,×1 ,×2 ).

2. Remove the Rear terminal cover.

6.4. Remove the Tuner unit

1. Unlock the cable clampers to free the cable.

2. Disconnect the connectors (A1, A5, A6, A7, A12 and A52).

3. Remove the screws (×2

4. Remove the screws (×4

) and remove the Tuner cover. ) and remove the Tuner unit.

6.3. Remove the P-Board

Caution:

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

1. Unlock the cable clampers to free the cable.

2. Disconnect the connectors (P2, P6, P7, P9, P11, P12 and

P25).

3. Remove the screws (×10

) and remove the P-Board.

6.5. Remove the A-Board

1. Remove the tuner unit. (See section 6.4.)

2. Remove the screw (×1 bracket.

3. Remove the screws (×6

) and remove the SD card

) and remove the A-Board.

TH-42PE7U

6.6. Remove the D-Board

6.8. Remove the SD-Board

1. Remove the tuner unit. (See section 6.4.)

2. Disconnect the connectors (D5 and D25).

3. Disconnect the flexible cables (D20, D31 and D32).

4. Remove the screws (×4

) and remove the D-Board.

1. Remove the screws (×2 ).

2. Remove the flexible cables (SD1, SD2, SD3 and SD4) connected to the SD-Board and remove the bridge connector (SC46-SD46).

3. Slide the SD-Board to the left to disconnect from a connector (SC42-SD42) on the SC-Board and remove the SD-Board.

6.7. Remove the SU-Board

1. Remove the screws (×2 ).

2. Remove the flexible cables (SU1, SU2, SU3 and SU4) connected to the SU-Board and remove the bridge connector (SC45-SU45).

3. Slide the SU-Board to the left to disconnect from a connector (SC41-SU41) on the SC-Board and remove the SU-Board.

6.9. Remove the SC-Board

1. Remove the SU-Board and SD-Board. (See section 6.7. and 6.8.)

2. Unlock the cable clampers to free the cable.

3. Disconnect the connector (SC2).

4. Disconnect the flexible cable (SC20).

5. Remove the screws (×6

) and remove the SC-Board.

6.10. Remove the SS-Board

TH-42PE7U

6.12. Remove the C2-Board

1. Disconnect the connectors (SS11, SS12 and SS23).

2. Disconnect the flexible cables (SS53A, SS54A, SS55A and SS56A).

3. Remove the screws (×6

) and remove the SS-Board.

1. Remove the tuner unit. (See section 6.4.)

2. Unlock the cable clampers to free the cable.

3. Remove the flexible cables holder fastening screws (×8 ).

4. Disconnect the flexible cables (CB5, CB6, CB7 and CB8).

5. Disconnect the flexible cables (C20 and C21).

6. Disconnect the connector (C23).

7. Remove the screws (×4

) and remove the C2-Board.

6.13. Remove the speaker L, R

1. Disconnect the relay connector.

2. Remove the screws (×4

L, R.

each) and remove the speaker

6.11. Remove the C1-Board

1. Remove the tuner unit. (See section 6.4.)

2. Unlock the cable clampers to free the cable.

3. Remove the flexible cables holder fastening screws (×8 ).

4. Disconnect the flexible cables (CB1, CB2, CB3 and CB4).

5. Disconnect the flexible cables (C10 and C11).

6. Remove the screws (×4

) and remove the C1-Board.

6.14. Remove the stand brackets

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.

2. Remove the stand brackets (left, right)fastening screws (×6

each) and remove the stand brackets (left, right).

TH-42PE7U

6.15. Remove the S-Board

1. Remove the screws (×2 ) and remove the S-Board metal frame.

2. Disconnect the connector (S2).

3. Remove the screws (×2

) and remove the S-Board.

6.17. Remove the Plasma panel section from the Cabinet assy (glass)

1. Remove the plasma panel section from the servicing stand

and lay on a fiat surface such as a table (covered) with the plasma panel surface facing downward.

2. Remove the stand brackets (left, right)fastening screws (×3

each).

6.16. Remove the K-Board

1. Remove the S-Board. (See section 6.15.)

2. Unlock the cable clampers to free the cable.

3. Disconnect the connectors (A1). (See section 6.4.)

4. Remove the screws (×2 the K-Board.

5. Disconnect the connectors (K1 and K2) and remove the KBoard.

) and slide to the right to remove

3. Replace the servicing stand and stand the set.

4. Remove the cabinet assy and the plasma panel fastening screws (×7

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

6. Remove the spacers and spacer rings (×6 ).

TH-42PE7U

6.18. 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-Board and the C2-Board, connect the flexible

cables (×16) from the Plasma panel to the C1-Board and the C2-Board, and fit the flexible cable holders.

3. Attach the Hooks (left, right) and fit the stand brackets (L,

R) to the new plasma panel.

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

5. Attach the cabinet assy and 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 residue to remain between the front glass and plasma panel.

TH-42PE7U

7 Caution statement

7.1. Caution statement.

Caution:

Please confirm that all flexible cables are assembled correctly. Also make sure that they are locked in the connectors. Verify by giving the flexible cables a very slight pull.

8 Location of Lead Wiring

8.1. Lead of Wiring (1)

TH-42PE7U

8.2. Lead of Wiring (2)

8.3. Lead of Wiring (3)

TH-42PE7U

8.4. Lead of Wiring (4)

8.5. Lead of Wiring (5)

TH-42PE7U

9 Self-check Function

Use the self-check function to test the unit.

1. Checking the IIC bus lines

2. Power LED Blinking timing

9.1. Check of the IIC bus lines

9.1.1. 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

control for more than 3 seconds.

9.1.2. Screen display

9.1.3. Check Point

Confirm the following parts if NG was displayed.

9.1.4. Exit

Disconnect the AC cord from wall outlet.

9.2. 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.

TH-42PE7U

9.3. 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 9.2.)

9.4. No Picture

TH-42PE7U

9.5. 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

10 Service Mode

10.1. How to enter into Service Mode

While pressing [VOLUME ( - )] button of the main unit, press [RECALL] button of the remote control three times within 3 seconds.

10.1.1. 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 ( - )

TH-42PE7U

10.1.2. 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.

Main item Sub item Sample Data Remark

ADJUST CONTRAST 000

COLOR 30 TINT 03 SUB-BRT 800

WB-ADJ R-CUT 80

G-CUT 80 B-CUT 80 R-DRV F6 G-DRV E2 B-DRV FC ALL-CUT 80 ALL-DRV FC

OPTION BOOT ROM Factory Preset.

STBY-SET 00 Emergency ON CLK MODE 00 CLOCK 000

AGING RGBW

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 RM-SET CODE A Fixed. SRV-TOOL - See Next.

10.1.3. How to exit

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

10.2. Service tool mode

10.2.1. How to access

1. Select “SRV-TOOL” in Service Mode.

2. Press [OK] button on the remote control.

10.2.2. 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 expect 2nd and 1st occurrence after shipment will be cleared by “Self-check indication and forced to factory

shipment setting”.

TH-42PE7U

10.2.3. POWER ON TIME/COUNT Note: To display TIME/COUNT menu, highlight position, then press MUTE for (3 sec).

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 the self-check or any other command.

10.2.4. Exit

1. Disconnect the AC code from wall outlet.

TH-42PE7U

11 Adjustment Proce dure

11.1. Driver Set-up

11.1.1. Item / Preparation

1. Input a white signal to plasma video input.

2. Set the picture controls as follows. Picture menu: Vivid Normal: Set Aspect: Full

Caution

1. First perform Vsus adjustment.

2. Confirmation of Vscn voltage should be performed after

confirmation of Vad adjustment. When Vad=-105V, Voltage of Vscn is 40V ±4V.

11.1.2. Adjustments

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

Check or adjust the following voltages with the multimeter.

Name Test Point Voltage Volume Remarks

Vsus TPVSUS

(SS) Ve TPVE (SS) Ve ± 1V VR6000 (SS) * Vset TPVSET

(SC) Vad TPVAD (SC) -105V ± 1V VR6600

Vscn TPVSCN

(SC) Vda TPVDA (SS) 75V ± 1V, -2V Fixed PFC C446(+)(-) 396.0V±0.5V R443 (P)

*See the Panel label.

Vsus ± 2V R628 (P) *

330V ± 7V Fixed

(SC)

Vad+145V ±4VFixed

11.2. Initialization Pulse Adjust

1. Input the White signal to plasma video input.

2. Set the picture controls as follows. Picture menu : Vivid Normal : Set Aspect : Full

3. Connect Oscilloscope to TPSC1 (SC). Check and adjust that the stand down pulse(T2) period are each within specification.

Test point Volume Level

T2 TPSC1 (SC) VR6602 (SC) 190 ± 10µ Sec

TH-42PE7U

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

11.3.1. Caution

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

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

Adjust the following voltages with the multimeter.

P.C.B. Name Test Point Voltage Volume Remarks

P Board Vsus TPVSUS (SS) Vsus ± 2V R628 (P) *

PFC C446 (+) (-) 396.0V ± 0.5V R443 (P) SC Board Vad TPVAD (SC) -105V ± 1V VR6600 (SC) SS Board Ve TPVE (SS) Ve ± 1V VR6000 (SS) * D, DG Board White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals

*See the Panel label.

Caution:

Absolutely do not reduce Vsus below Ve not to damage the P.C.B.

TH-42PE7U

11.4. Adjustment Volume Location

11.5. Test Point Location

+ 99 hidden pages