Table Of Contents - Panasonic CT-27DC50B Service Manual

Important Safety Notice . . . . . . . . . . . . . . . . . . 2
Safety Precautions . . . . . . . . . . . . . . . . . 2
Service Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Horizontal Oscillator Disable Circuit . . . . 5
Receiver Feature Table . . . . . . . . . . . . . . . . . . . 6
Location of Controls (Receiver & DVD Player)
Receiver Front Control Panel . . . . . . . . . 7
Location of Controls (Remote)
EUR511503 . . . . . . . . . . . . . . . . . . . . . . 9
Receiver Exploded View . . . . . . . . . . . . . . . . . 10
Disassembly for Service . . . . . . . . . . . . . . . . . .11
Back Cover . . . . . . . . . . . . . . . . . . . . . . .11
A Board - Main Chassis . . . . . . . . . . . . .11
C Board - CRT Output . . . . . . . . . . . . . .11
G Board - Video Input (front) . . . . . . . . .11
JJ Board - A/V Switch & A/V Decoder . .11
K Board - Customer Controls . . . . . . . . 12
M Board - DVD-TV CPU Interface . . . . 12
P Board - DVD Power Supply. . . . . . . . 12
W Board - Connector Interface Board . 12
CRT Replacement . . . . . . . . . . . . . . . . 12
DVD Replacement . . . . . . . . . . . . . . . . 12
Chassis Service Adjustment Procedures . . . 16
131.0V B+ Voltage Confirmation . . . . . 16
Source Voltage Chart . . . . . . . . . . . . . . 16
High Voltage Check . . . . . . . . . . . . . . . 16
DVD Voltage Check . . . . . . . . . . . . . . . 16
Purity and Convergence Procedures . . . . . . 17
Serviceman Mode (Electronic Controls) . . . . 20
Entering Serviceman Mode . . . . . . . . . 20
Toggle between Modes. . . . . . . . . . . . . 20
Exiting the Serviceman Mode. . . . . . . . 20
Sub-Data Adjustment . . . . . . . . . . . . . . 21
Cut-Off Adjustment . . . . . . . . . . . . . . . . 21
Options Adjustment . . . . . . . . . . . . . . . 22
MTS Adjustment . . . . . . . . . . . . . . . . . . 22
Comb Filter Adjustment . . . . . . . . . . . . 23
To Check Purity . . . . . . . . . . . . . . . . . . 24
Helpful Hints . . . . . . . . . . . . . . . . . . . . . 24
Instructional Flow Chart
for Serviceman Mode . . . . . . . . . . . . . . . . 26
Service Adjustments
(Electronic Control). . . . . . . . . . . . . . . . . . 28
Sub-Brightness . . . . . . . . . . . . . . . . . . . 28
Video Adjustment Level . . . . . . . . . . . . 28
Sub-Contrast. . . . . . . . . . . . . . . . . . . . . 28
Tint/Color Adjustment . . . . . . . . . . . . . . 28
Color Temperature Adjustment . . . . . . . 29
Complete Adjustment . . . . . . . . . . . . . . 29
Horizontal Centering . . . . . . . . . . . . . . . 30
Audio Adjustment . . . . . . . . . . . . . . . . . 30
MTS Circuit Adjustment . . . . . . . . . . . . 30
Input Level Adjustment . . . . . . . . . . . . . 30
Stereo Separation Adjustment (Sb) . . . 30
Clock Adjustment (Sb) . . . . . . . . . . . . . 31
Vertical Size . . . . . . . . . . . . . . . . . . . . . 31
Service Adjustments
(Mechanical Controls). . . . . . . . . . . . . . . . 31
VCO Field Adjustment L105 . . . . . . . . . 31
Focus (Part of T551). . . . . . . . . . . . . . . 31
Audio Signal Path Block Diagram . . . . . . . . . 32
Video-Chroma Signal Path
Block Diagrams . . . . . . . . . . . . . . . . . . . . . 33
Sync Path Block Diagram . . . . . . . . . . . . . . . . 34
IC101 VCJ IN/OUT Pins and Functions . . . . . 35
IC001 MPU IN/OUT Pins and Functions. . . . . 36
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Schematics and Voltages
A-Board
(Left Portion) . . . . . . . . . . . . . . . . . . . Sheet-1A
(Right Portion) . . . . . . . . . . . . . . . . . . Sheet-2A
(Left Portion) . . . . . . . . . . . . . . . . . . . Sheet-1B
C-Board . . . . . . . . . . . . . . . . . . . . . . . .Sheet-1B
G-Board . . . . . . . . . . . . . . . . . . . . . . . .Sheet-1B
JJ-Board . . . . . . . . . . . . . . . . . . . . . . .Sheet-3A
K-Board . . . . . . . . . . . . . . . . . . . . . . . .Sheet-2B
M-Board . . . . . . . . . . . . . . . . . . . . . . . .Sheet-2B
P-Board . . . . . . . . . . . . . . . . . . . . . . . .Sheet-2B
W-Board. . . . . . . . . . . . . . . . . . . . . . . .Sheet-3A
Waveforms . . . . . . . . . . . . . . . . . . . . .Sheet-1B
LAYOUTS
A, C, & G-Boards . . . . . . . . . . . . . . . .Sheet-1B
P, M, & K-Boards . . . . . . . . . . . . . . . . .Sheet-2B
JJ & W . . . . . . . . . . . . . . . . . . . . . . . . .Sheet-3A
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