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FILE NO. 050-200234
SERVICE MANUAL
PLASMA DISPLAY MONITOR
42WP27B, 42WP27C
42WP27E, 42WP27F
42WP27R
PRINTED IN JAPAN Dec, 2002
CONTENTS
Page Page
1 Applicable signals 3 13.14. H3, S1 and V1-Board 56
2 Safety Precautions 4 14 Block and Schematic Diagrams 57
2.1. General Guidelines 4 14.1. Schematic Diagram Notes 57
3 Prevention of Electro Static Discharge (ESD) to 14.2. Main Block Diagram 58
Electrostatically Sensitive (ES) Devices 5 14.3. F-Board Schematic Diagram 59
4 About lead free solder (PbF) 6 14.4. Power Block Diagram 60
5 PCB Structure sheet of GP5D chassis 7 14.5. P-Board (1 of 2) Schematic Diagram 61
6 Service Hint 8 14.6. P-Board (2 of 2) Schematic Diagram 62
7 Location of Lead Wiring 9 14.7. HX-Board Block Diagram 63
8 Adjustment Procedure 10 14.8. HX-Board Schematic Diagram 64
8.1. +B Set-up 10 14.9. Option RTB421 Block Diagram 65
8.2. Driver Set-up 10 14.10. Option RTB421 (1 of 2) Schematic Diagram 66
8.3. Initialization Pulse Adjust 11 14.11. Option RTB421 (2 of 2) Schematic Diagram 67
8.4. P.C.B. (Printed Circuit Board) exchange 12 14.12. D1-Board Block Diagram 68
8.5. Adjustment Volume Location 12 14.13. D1-Board (1 of 6) Schematic Diagram 69
8.6. Test Point Location 12 14.14. D1-Board (2 of 6) Schematic Diagram 70
9 Service mode 13 14.15. D1-Board (3 of 6) Schematic Diagram 71
9.1. CAT (computer Aided Test) mode 13 14.16. D1-Board (4 of 6) Schematic Diagram 72
9.2. IIC mode structure (following items value is sample data.) 14.17. D1-Board (5 of 6) Schematic Diagram 73
15 14.18. D1-Board (6 of 6) Schematic Diagram 74
10 Alignment 16 14.19. D2-Board Block Diagram 75
10.1. Pedestal setting 16 14.20. D2-Board (1 of 6) Schematic Diagram 76
10.2. NTSC panel white balance 17 14.21. D2-Board (2 of 6) Schematic Diagram 77
10.3. PAL/SECAM panel white balance 18 14.22. D2-Board (3 of 6) Schematic Diagram 78
10.4. PC/RGB panel white balance 20 14.23. D2-Board (4 of 6) Schematic Diagram 79
10.5. HD/ 525i /525p panel white balance 22 14.24. D2-Board (5 of 6) Schematic Diagram 80
10.6. 625i panel balance 24 14.25. D2-Board (6 of 6) Schematic Diagram 81
10.7. Sub brightness setting 25 14.26. C1 and C2-Board Block Diagram 82
11 Trouble shooting guide 27 14.27. C1-Board Schematic Diagram 83
11.1. Self Check 27 14.28. C2-Board Schematic Diagram 84
11.2. No Power 28 14.29. SC-Board Block Diagram 85
11.3. No Picture 29 14.30. SC-Board (1 of 2) Schematic Diagram 86
11.4. Local screen failure 29 14.31. SC-Board (2 of 2) Schematic Diagram 87
12 Option Setting 30 14.32. SD-Board Block Diagram 88
13 Conductor Views 33 14.33. SD-Board Schematic Diagram 89
13.1. F-Board 33 14.34. SU-Board Block Diagram 90
13.2. P-Board 34 14.35. SU-Board Schematic Diagram 91
13.3. HX-Board 37 14.36. SS-Board Block Diagram 92
13.4. Option RTB421 38 14.37. SS, SS2, SS3 and S1-Board Schematic Diagram 93
13.5. D1-Board 40 14.38. Z-Board Block Diagram 94
13.6. D2-Board 42 14.39. H3 and Z-Board Schematic Diagram 95
13.7. C1-Board 45 15 Mechanical Parts Location 97
13.8. C2-Board 46 16 Replacement Parts List 99
13.9. SC-Board 47 16.1. Replacement Parts List Notes 99
13.10. SU-Board 50 16.2. Mechanical Replacement Parts List 100
13.11. SD-Board 51 16.3. Electrical Replacement Parts List 101
13.12. SS, SS2, SS3-Board 52 17 Specifications 111
13.13. Z-Board 55
2
1 Applicable signals
3
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
1M9 and 5.2M9.
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 1.5k9, 10 watts resistor, in parallel with a 0.15