DOWNLOAD Panasonic TH-42PF11EK Service Manual ↓ Size: 21.87 MB | Pages: 127 in PDF or view online for FREE

Order Number PCZ0810171CE

GPF11D Chassis

PAGE

PAGE

1 Safety Precautions----------------------------------------------- 3

1.1. General Guidelines---------------------------------------- 3
1.2. Touch-Current Check ------------------------------------- 3

2 Warning -------------------------------------------------------------- 4

2.1. Prevention of Electrostatic Discharge (ESD)

to Electrostaticy 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 ----------------------------------------------------- 8
5 Operating Instructions------------------------------------------ 9

5.1. Options Adjustments-------------------------------------- 9

6 Service Mode -----------------------------------------------------11

6.1. CAT (Computer Aided Test) mode -------------------11
6.2. IIC mode structure (following items value is

sample data) -----------------------------------------------14

7 Troubleshooting Guide ----------------------------------------15

7.1. Self Check--------------------------------------------------15

7.2. No Power--------------------------------------------------- 17
7.3. No Picture-------------------------------------------------- 17
7.4. Local screen failure-------------------------------------- 18

8 Disassembly and Assembly Instructions--------------- 19

8.1. Removal of Rear Cover -------------------------------- 19
8.2. Removal of HA-Board----------------------------------- 19
8.3. Removal of HDE-Board -------------------------------- 19
8.4. Removal of Slot Block ---------------------------------- 19
8.5. Removal of HX-Board----------------------------------- 20
8.6. Removal of DS-Board----------------------------------- 20
8.7. Removal of PB-Board----------------------------------- 20
8.8. Removal of DN-Board ---------------------------------- 21
8.9. Removal of D-Board------------------------------------- 21

8.10. Removal of P-Board------------------------------------- 21

8.11. Removal of Speaker Terminal Block (L, R) -------- 22

8.12. Removal of Fan------------------------------------------- 22
8.13. Removal of SU-Board and SD-Board--------------- 23
8.14. Removal of SC-Board----------------------------------- 23
8.15. Removal of SS-Board----------------------------------- 24

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TH-42PF11EK

8.16. Removal of C1, C2-Board ----------------------------- 24
8.17. Removal of S1-Board ----------------------------------- 25
8.18. Removal of Front Glass, V1, V2-Board and

Cabinet------------------------------------------------------ 26

8.19. Removal of Plasma Display Panel------------------- 27

9 Measurements and Adjustments -------------------------- 31

9.1. Adjustment Procedure ---------------------------------- 31
9.2. Adjustment ------------------------------------------------- 34

10 Block Diagram --------------------------------------------------- 39

10.1. Block (1 of 8) Diagram ---------------------------------- 39
10.2. Block (2 of 8) Diagram ---------------------------------- 40
10.3. Block (3 of 8) Diagram ---------------------------------- 41
10.4. Block (4 of 8) Diagram ---------------------------------- 42
10.5. Block (5 of 8) Diagram ---------------------------------- 43
10.6. Block (6 of 8) Diagram ---------------------------------- 44
10.7. Block (7 of 8) Diagram ---------------------------------- 45
10.8. Block (8 of 8) Diagram ---------------------------------- 46

11 Wiring Connection Diagram --------------------------------- 47

11.1. Wiring (1) --------------------------------------------------- 47
11.2. Wiring (2) --------------------------------------------------- 48
11.3. Wiring (3) --------------------------------------------------- 49

12 Schematic Diagram--------------------------------------------- 51

12.1. Schematic Diagram Notes ----------------------------- 51
12.2. P-Board (1 of 2) Schematic Diagram --------------- 52
12.3. P-Board (2 of 2) Schematic Diagram --------------- 53
12.4. PB, V1 and V2-Board Schematic Diagram -------- 54
12.5. HA-Board Schematic Diagram------------------------ 55
12.6. HX-Board Schematic Diagram------------------------ 56
12.7. HDE-Board (1 of 3) Schematic Diagram ----------- 57
12.8. HDE-Board (2 of 3) Schematic Diagram ----------- 58
12.9. HDE-Board (3 of 3) Schematic Diagram ----------- 59

12.10. DS-Board (1 of 6) Schematic Diagram ------------- 60

12.11. DS-Board (2 of 6) and H3-Board Schematic

Diagram----------------------------------------------------- 61

12.12. DS-Board (3 of 6) Schematic Diagram ------------- 62
12.13. DS-Board (4 of 6) Schematic Diagram ------------- 63
12.14. DS-Board (5 of 6) Schematic Diagram ------------- 64
12.15. DS-Board (6 of 6) Schematic Diagram ------------- 65
12.16. DN-Board (1 of 8) Schematic Diagram ------------- 66
12.17. DN-Board (2 of 8) Schematic Diagram ------------- 67
12.18. DN-Board (3 of 8) Schematic Diagram ------------- 68
12.19. DN-Board (4 of 8) Schematic Diagram ------------- 69
12.20. DN-Board (5 of 8) Schematic Diagram ------------- 70
12.21. DN-Board (6 of 8) Schematic Diagram ------------- 71
12.22. DN-Board (7 of 8) Schematic Diagram ------------- 72
12.23. DN-Board (8 of 8) Schematic Diagram ------------- 73
12.24. D-Board (1 of 7) Schematic Diagram --------------- 74
12.25. D-Board (2 of 7) Schematic Diagram --------------- 75
12.26. D-Board (3 of 7) Schematic Diagram --------------- 76
12.27. D-Board (4 of 7) Schematic Diagram --------------- 77
12.28. D-Board (5 of 7) Schematic Diagram --------------- 78
12.29. D-Board (6 of 7) Schematic Diagram --------------- 79
12.30. D-Board (7 of 7) Schematic Diagram --------------- 80
12.31. C1-Board (1 of 3) Schematic Diagram-------------- 81
12.32. C1-Board (2 of 3) Schematic Diagram-------------- 82
12.33. C1-Board (3 of 3) Schematic Diagram-------------- 83
12.34. C2-Board (1 of 3) Schematic Diagram-------------- 84
12.35. C2-Board (2 of 3) Schematic Diagram-------------- 85
12.36. C2-Board (3 of 3) Schematic Diagram-------------- 86
12.37. SC-Board (1 of 3) Schematic Diagram ------------- 87
12.38. SC-Board (2 of 3) Schematic Diagram ------------- 88

12.39. SC-Board (3 of 3) Schematic Diagram------------- 89
12.40. SU-Board (1 of 2) Schematic Diagram------------- 90
12.41. SU-Board (2 of 2) Schematic Diagram------------- 91
12.42. SD-Board (1 of 3) Schematic Diagram------------- 92
12.43. SD-Board (2 of 3) Schematic Diagram------------- 93
12.44. SD-Board (3 of 3) Schematic Diagram------------- 94
12.45. SS-Board (1 of 2) and S1-Board Schematic

Diagram ---------------------------------------------------- 95

12.46. SS-Board (2 of 2) Schematic Diagram ------------- 96

13 Printed Circuit Board------------------------------------------ 97

13.1. P-Board ---------------------------------------------------- 97
13.2. PB-Board -------------------------------------------------100
13.3. V1, V2, S1 and H3-Board ----------------------------101
13.4. HA-Board -------------------------------------------------102
13.5. HX-Board -------------------------------------------------103
13.6. HDE-Board -----------------------------------------------104
13.7. DS-Board -------------------------------------------------105
13.8. DN-Board -------------------------------------------------107
13.9. D-Board ---------------------------------------------------109

13.10. C1-Board-------------------------------------------------- 111

13.11. C2-Board-------------------------------------------------- 112

13.12. SC-Board ------------------------------------------------- 113
13.13. SU-Board ------------------------------------------------- 116
13.14. SD-Board ------------------------------------------------- 117
13.15. SS-Board ------------------------------------------------- 118

14 Exploded View and Replacement Parts List----------121

14.1. Exploded View and Mechanical Replacement

Parts List --------------------------------------------------121

14.2. Electrical Replacement Parts List ------------------121

15 Schematic Diagrams for printing with A4 Size ------163

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TH-42PF11EK

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. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth ground

such as a water pipe, as shown in Figure 1.

3. Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reserve the AC plug in the AC outlet and repeat each of the above measure.
6. The potential at any point (TOUGH CURRENT)

expressed as voltage U

1

 and U

2

, does not exceed the fol-

lowing values:
For a. c.: U

1

 = 35 V (peak) and U

2

 = 0.35 V (peak);

For d. c.: U

1

 = 1.0 V,

The limit value of U

2

 = 0.35 V (peak) for a. c. and U

1

 =

1.0 V for d. c. correspond to the values 0.7 mA (peak)
a. c. and 2.0 mA d. c.

The limit value U

1

 = 35 V (peak) for a. c. correspond

to the value 70 mA (peak) a. c. for frequencies greater
than 100 kHz.

7. In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should be

repaired and rechecked before it is returned to the customer.

Figure 1

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TH-42PF11EK

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).