Panasonic PT- 56WX51CE, Service Manual

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Service Manual
Important Safety Notice . . . . . . . . . . . . . . . . . . . 2
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . 2
General Guidelines . . . . . . . . . . . . . . . . . 2
X-ray Precautions . . . . . . . . . . . . . . . . . . 2
Leakage Current Cold Check . . . . . . . . . 2
Leakage Current Hot Check . . . . . . . . . . 2
Insulation Test . . . . . . . . . . . . . . . . . . . . . 2
X-ray Radiation . . . . . . . . . . . . . . . . . . . . 2
Important Safety Tests. . . . . . . . . . . . . . . . . . . . 3
Measuring H.V. . . . . . . . . . . . . . . . . . . . . 3
(EHT) Protector Operation Check . . . . . . 3
Service Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Leadless Chip Component
(surface mount) . . . . . . . . . . . . . . . . . 5
Component Removal. . . . . . . . . . . . . . . . 5
Chip Component Installation . . . . . . . . . . 5
How to Replace Flat-IC . . . . . . . . . . . . . . 5
Feature Table . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Boards Designation . . . . . . . . . . . . . . . . . . . . . . 7
PTV - Location of Controls . . . . . . . . . . . . . . . . 8
Quick Reference Control Operation . . . . 8
Remote - Location of Controls . . . . . . . . . . . . . 9
Chassis & Boards Layout . . . . . . . . . . . . . . . . 10
Board Description . . . . . . . . . . . . . . . . . 10
Disassembly for Service . . . . . . . . . . . . . . . . . 11
Speaker Grill Removal. . . . . . . . . . . . . . 11
Keyboard Removal . . . . . . . . . . . . . . . . 11
Speakers Replacement . . . . . . . . . . . . . 11
Cabinet Back Lower Removal . . . . . . . . 11
Cabinet Back Cover Removal . . . . . . . . 11
Cabinet Front Removal . . . . . . . . . . . . . 12
Screen Assembly. . . . . . . . . . . . . . . . . . 12
Main Chassis Block . . . . . . . . . . . . . . . . 12
Disassembly for CRT Replacement . . . 13
X-RAYS SHIELD . . . . . . . . . . . . . . . . . . 13
CRT Replacement . . . . . . . . . . . . . . . . 13
Optical Block Position Adjustment. . . . . 14
PTV Screen Assemblies . . . . . . . . . . . . 15
B+ Voltages Table . . . . . . . . . . . . . . . . . 15
CRT Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Dynamic Focus Adjustments . . . . . . . . . 16
Electrical Adjustment . . . . . . . . . . . . . . . 16
Focus - Optical Lens Adjustment. . . . . . 17
Optical Adjustments. . . . . . . . . . . . . . . . 17
Electric & VM Focus Adjustment,
Complete adjustment . . . . . . . . . . .17
Vertical Size Adjustment (VSIZE) . . . . . 18
Horizontal Phase Adjustment (H-POS) . 18
Trapezoid Adjustment (EWTRA) . . . . . . 18
Pincushion Adjustment (PCC) . . . . . . . . 19
Centering Magnets Adjustment . . . . . . . 19
Horizontal Size Adjustment (H WID) . . . 19
Convergence Adjustment . . . . . . . . . . .19
Coarse Adjustment Mode (COARSE) . . 20
Fine Adjustment Mode (FINE) . . . . . . . . 22
Horizontal and Vertical Size Check . . . . 24
Convergence Alignment Template. . . . . 24
Serviceman Mode (Electronic Controls) . . . . 25
Quick Entry to Serviceman Mode: . . . . . 25
To toggle between Aging
and Serviceman modes . . . . . . . . . 25
Exiting the Serviceman Mode:. . . . . . . . 25
To Check Purity: . . . . . . . . . . . . . . . . . . 25
Instructional Flow Chart
for Serviceman Mode . . . . . . . . . . . 28
HV_Feedback Voltage . . . . . . . . . . . . . . 30
Bright Adjustment (BRIGHT) . . . . . . . . . 30
Sub-Contrast (CONT), Sub-Bright
(FINAL) Adjustment. . . . . . . . . . . . . 30
Tint Adjustment (TINT) . . . . . . . . . . . . . 30
Red, Green & Blue Screen Cutoff . . . . . 31
White Balance Adjustment . . . . . . . . . . 31
Tint and Color Check . . . . . . . . . . . . . . . 31
MTS Circuit Adjustments . . . . . . . . . . . . 31
Input Level Adjustment (MTSIN) . . . . . . 31
Stereo Separation Adjustment
(SEPAL & SEPAH) . . . . . . . . . . . . . 31
Clock Adjustment (CLOCK) . . . . . . . . . . 32
Audio Signal Path Block Diagram. . . . . . . . . . 33
Video-Chroma Signal Path Block Diagram . . 34
IIC Connection . . . . . . . . . . . . . . . . . . . . . . . . . 35
Description of Connectors . . . . . . . . . . . . . . . 36
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
D-Board layout . . . . . . . . . . . . . . . . . . . . . . . . . . 49
D-Board schematic (left portion). . . . . . . . . . . . . 50
D-Board schematic (right portion). . . . . . . . . . . . 51
A-Board schematic (left portion) . . . . . . . . . . . . . 52
A-Board schematic (left middle) . . . . . . . . . . . . . 53
A-Board schematic (right middle) . . . . . . . . . . . . 54
A-Board schematic (right portion) . . . . . . . . . . . . 55
DH-Board schematic . . . . . . . . . . . . . . . . . . . . . 56
K, G & R-Board schematics & layouts . . . . . . . . 57
LR-Board schematic, layout & voltages . . . . . . . 58
LB-Board schematic, layout & voltages . . . . . . . 59
LG-Board schematic, layout & voltages . . . . . . . 60
A & D-Board voltages . . . . . . . . . . . . . . . . . . . . . 61
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62