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Full Panasonic PT-51HX41E, PT-56HX41E, PT-61HX41E HDTV MONITOR Service Manual with REPLACEMENT PARTS LIST and schematics. This service information is designed for experienced repair technicians only and not designed for use by the general public.

Table of contents

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

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