Panasonic CT20SX10B - 20" COLOR TV, Service Manual, Page: 3 / 60

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Important Safety Notice . . . . . . . . . . . . . . . . . . 2
Safety Precautions . . . . . . . . . . . . . . . . . 2
Service Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
X-ray Protection Circuit Test . . . . . . . . . . 5
Receivers Feature Table . . . . . . . . . . . . . . . . . . 6
Board Designation. . . . . . . . . . . . . . . . . . . . . . . 7
Location of Controls (Receiver)
Receiver Front Control Panel . . . . . . . . . 8
Location of Controls (Remote)
EUR511502 . . . . . . . . . . . . . . . . . . . . . . 9
Disassembly for Service . . . . . . . . . . . . . . . . . 10
Boards Removal . . . . . . . . . . . . . . . . . . 10
Disassembly for CRT Replacement . . . . . . . . 10
Identification of Main components . . . . . . . . .11
Purity and Convergence Procedures . . . . . . 15
Chassis Service Adjustment Procedures . . . 18
140.0V B+ Voltage Confirmation . . . . . 18
Source Voltage Chart . . . . . . . . . . . . . . 18
High Voltage Check . . . . . . . . . . . . . . . 19
Deflection Circuit Pre-adjustment . . . . . 19
Serviceman Mode (Electronic Controls) . . . . 20
Entering Serviceman Mode . . . . . . . . . 20
Toggle between Modes. . . . . . . . . . . . . 20
Exiting the Serviceman Mode . . . . . . . . 20
Purity Check . . . . . . . . . . . . . . . . . . . . . 20
Helpful Hints . . . . . . . . . . . . . . . . . . . . . 20
Sub-Data Adjustment . . . . . . . . . . . . . . 21
Cut-Off Adjustment . . . . . . . . . . . . . . . . 21
Geometric Adjustment . . . . . . . . . . . . . 22
S Options Adjustment . . . . . . . . . . . . . . 22
Geomagnetic Adjustment . . . . . . . . . . . 23
Instructional Flow Chart
for Serviceman Mode . . . . . . . . . . . . . . . . 24
Service Adjustments
(Electronic Control). . . . . . . . . . . . . . . . . . 27
Sub-Brightness . . . . . . . . . . . . . . . . . . . 27
Sub-Contrast. . . . . . . . . . . . . . . . . . . . . 27
Tint/Color Adjustment . . . . . . . . . . . . . . 27
Color Temperature Adjustment (W/B). . 28
Complete Adjustment . . . . . . . . . . . . . . 28
Horizontal Centering . . . . . . . . . . . . . . . 29
E-W Pincushion . . . . . . . . . . . . . . . . . . 29
Horizontal Width . . . . . . . . . . . . . . . . . . 29
Vertical Position . . . . . . . . . . . . . . . . . . 29
Vertical Linearity . . . . . . . . . . . . . . . . . . 30
Vertical Correction. . . . . . . . . . . . . . . . . 30
MTS Circuit Confirmation . . . . . . . . . . . 30
Audio Signal Path Block Diagram. . . . . 32
Video-Chroma Signal Path
Block Diagram . . . . . . . . . . . . . . . . 33
IC001 MPU IN/OUT
Pins and Functions. . . . . . . . . . . . . 34
IC101 VCJ IN/OUT
Pins and Functions. . . . . . . . . . . . . 35
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36