Panasonic CT-20SX11E Service Manual
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Panasonic CT-20SX11E Service Manual

Panasonic CT-20SX11E Service Manual

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Service Manual
This Service manual is issued as a service guide for the models of the NA6DV family listed above. Included in this
manual are a set of schematics, block diagrams, functional descriptions, alignment procedures, disassembly
procedures, and a complete parts list.
"WARNING! This Service Manual is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death."
The service technician is required to read and follow the "Safety Precautions" and "Important Safety Notice" in this Main Manual.
Color Television
Main Manual
(NA6DV)
Panasonic
Models
CT-20SX11E
CT-20SX11CE
Copyright 2001 by Matsushita Electric Corporation of
America. All rights reserved. Unauthorized copying
and distribution is a violation of law.
ORDER NO. MTNC010735C1
B1
Chassis
AP380
AP380

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Summary of Contents for Panasonic CT-20SX11E

  • Page 1 Main Manual (NA6DV) Panasonic Models Chassis CT-20SX11E AP380 CT-20SX11CE AP380 This Service manual is issued as a service guide for the models of the NA6DV family listed above. Included in this manual are a set of schematics, block diagrams, functional descriptions, alignment procedures, disassembly procedures, and a complete parts list.

  • Page 2: Important Safety Notice

    Important Safety Notice Special components are used in this television set which are important for safety. These parts are identified on the schematic diagram by the symbol and printed in BOLD TYPE on the replacement part list. It is essential that these critical parts are replaced with the manufacturer’s specified replacement part to prevent X-ray radiation, shock, fire or other hazards.

  • Page 3: Table Of Contents

    Important Safety Notice ....2 Service Adjustments (Electronic Control)....21 Safety Precautions .

  • Page 4: Service Notes

    Service Notes Note: These components are affixed with glue. Be careful not to break or damage any foil under the component or at the pins of the ICs when removing. Usually applying heat to the component for a short time while twisting with tweezers will break the component loose. Leadless Chip Component How to Replace Flat-IC (surface mount)
  • Page 5 Service Notes (Continued) IMPORTANT: To protect against possible damage to WARNING: This Receiver has been designed to meet the solid state devices due to arcing or static or exceed applicable safety and X-ray radiation discharge, make certain that all ground wires and CTR protection as specified by government agencies and DAG wire are securely connected.

  • Page 6: Receivers Feature Table

    Receiver Feature Table CT-20SX11E & FEATURE\MODEL CT-20SX11CE Chassis AP380 Tuning system # of channels Menu language Eng/Span/Fr Closed Caption V-Chip 75 Ω input Remote Model # EUR511502 Picture tube A51LSK955X-A PureFlat Picture Tube Comb Filter 3 Line Digital H. Edge Correction...

  • Page 7: Location Of Controls (Receiver)

    Location of Controls (Receiver) Remote Control Sensor Figure 2. Location of Controls (Receiver). Quick Reference Control Operation Quick Reference Control Operation Power Button - Press to turn ON or OFF. Volume Buttons - Press to adjust Sound Level, or to adjust Audio Menus, Video Menus, and select operating features when menus are displayed Channel Buttons - Press to select programmed channels.

  • Page 8: Location Of Controls (Remote)

    Location of Controls (Remote) LIGHT Button Power Button Press to light remote control buttons. Press to turn ON and OFF. TV/VIDEO Button ACTION Button Press to select TV or Video input. Press to display Main Menu and access or exit On Screen features CH (channel) Buttons and Adjustment Menus.

  • Page 9: Disassembly For Service

    Disassembly for Service Back Cover Disassembly for CRT Replacement 1. Discharge the CRT as instructed in the Safety Remove all the screws marked with an arrow( Precautions (see page 2). from the back of the Receiver. 2. Disconnect the yoke (DY) plug, degaussing coil Note: Screw configuration, type, and number of (DEG) plug and the CRT 2nd anode button from screws vary depending on the model of the...

  • Page 10: Chassis Service Adjustment Procedures

    Chassis Service Adjustment Procedures All service adjustments are factory preset and should not require adjustment unless controls and/or associated components are replaced. Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use IC803’s heat sink when the HOT ground symbol ( ) is used.

  • Page 11: Purity And Convergence Procedures

    Purity and Convergence Procedure Adjustment is necessary only if the CRT or the For a 1-piece assembly (see Fig. 8): deflection yoke is replaced or if the setting was Position like tabs of purity devices together at 12 disturbed. The complete procedure consists of: o’clock to reduce any magnetic field effect.
  • Page 12 Initial Center Static Convergence Slowly move the deflection yoke and purity rings assembly toward the CRT board and adjust the purity Connect a dot/cross hatch generator to the Receiver magnet rings to set vertical green raster at center of and tune in a signal. Observe misconvergence at screen (see Fig.
  • Page 13 As the yoke is tilted vertically, the rasters produced outside guns rotate in opposite directions. Figure 11. Vertical Yoke Movement Raster produced from one of the outside electron beams Raster from the other side electron beam R G B Static convergence magnets are set for center convergence As the yoke is tilted horizontally, one raster gets larger while the other gets...

  • Page 14: Service Mode (Electronic Controls)

    Service Mode (Electronic Controls) This Receiver has electronic technology using the I²C Bus Concept. It performs as a control function and it replaces many mechanical controls. Instead of adjusting mechanical controls individually, many of the control functions are now performed by using “On Screen Display Menu”. (The Service Adjustment Mode.) Note: It is suggested that the technician reads all the way through and understand the following procedure for Entering/Exiting the Service Adjustment Mode;...

  • Page 15: Sub-Data Adjustment

    Press the Power Button on the Remote Control to select the Service Adjustment. For Adjustments: 1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the Remote Control to select one of value set (b in Fig. 14 ) for Remote Control to adjust the each address...

  • Page 16: Options Adjustment

    Press the Power Button on the Remote Control to select the Service Adjustment For Adjustments: 1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the value set (b in Fig. 14 ) for Remote Control to select one of Remote Control to adjust the the available Service Adjustments each...

  • Page 17: Comb Filter Adjustment

    Press the Power Button on the Remote Control to select the Service Adjustment For Adjustments: 1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the Remote Control to select one of value set (b in Fig. 14 ) for Remote Control to adjust the the available Service Adjustments each...

  • Page 18: To Check Purity

    To Check Purity: Press the Recall Button on the Remote Control when in Service Mode (red “CHK” is displayed) to enter the Purity Field Check Mode. NORMAL SCREEN Press Recall again to select desired field. BLUE GRN. WHITE SCREEN SCREEN SCREEN SCREEN Figure 15.

  • Page 19: Instructional Flow Chart For Service Mode

    Instructional Flow Chart for Service Mode IMPORTANT NOTE: Always Exit the Service Mode Following Adjustments. NORMAL MODE Momentary short FA1 to FA2 ( AGING MODE • Yellow “CHK” appears in upper left corner of screen. WHITE • Volume Up/Down operate rapidly. SCREEN •...
  • Page 20 Instructional Flow Chart for Service Mode - Continued LOUDNESS COMPENSATION (ON REMOTE) VCJ TEST PIP TINT CUT-OFF ADJUSTMENTS. BEAM LIMIT CLOCK C ITEMS. ADJUSTMENT HORIZ CENTER FREERUN YNR VID ADJ Adj. RIGHT 1/16 RF-AGC needed? LEFT 1/16 DOWN 1/16 YNR SWITCH UP 1/16 (ON REMOTE) DRIVE B...

  • Page 21: Service Adjustments

    Service Adjustments (Electronic Controls) Sub-Brightness Preparation: 1. Apply a color bar signal pattern with 87.5% Service DAC Adjustment (B2) modulation, 70% saturated color bar with a 100 Adjustment of this control is important for setting proper IRE white and 7.5 black. operation of customer brightness and picture controls.

  • Page 22: Color Temperature Adjustment

    Service Adjustments (Electronic Controls, cont.) Procedure: 1. Connect the oscilloscope to C1-2 (CRT-Board). 2. In Service Mode for making electronic adjustment, 1. In the Service Mode for making electronic select the Sub-Bright DAC (B2). adjustments, select DAC Sub-Tint Adjustment 3. Press the R-Tune key on the remote. (B1).

  • Page 23: Horizontal Centering

    Service Adjustments (Electronic Controls, cont.) 20. In the Service Mode for making electronic MTS Circuit Adjustments adjustments select the DAC DRIVE adjustments The MTS Circuit Adjustments require two steps: (C3) RED, (C4) BLUE and adjust for warm white in 1. Input Level Adjustment. a white color bar pattern.

  • Page 24: Clock Adjustment (Sb)

    Clock Adjustment (Sb) 5. Calculate based following formula: Preparation: Connect the frequency counter from TPS1 (IC001 244.1406 pin 13 Hz – ×10 0.901 ----------------------------------------------------------------- - Pin 13) to cold ground ( 244.1406 Note: Frequency Counter probe capacitance should be 8pF or less. Note: Pin measurement will...

  • Page 25: Audio Signal Path Block Diagram

    Audio Signal Path Block Diagram Figure 26. Audio Signal Path Block Diagram. - 25 -...

  • Page 26: Video-Chroma Signal Path Block Diagrams

    Video-Chroma Signal Path Block Diagram Figure 27. Video-Chroma Path Block Diagram. - 26 -...

  • Page 27: Component Identification

    Identification of Components 2 screws at the top edge of the receiver 1 screw at the lower 1 screw at the lower edge of the receiver edge of the receiver 1 screw by the 1 screw by the flyback assembly A/V jacks Figure 28.
  • Page 28 Identification of Components CRT (secured to cabinet by 4 screws on corners of CRT) Anode (high voltage) Yoke Speaker Bracket (2 screws) C board Speaker (4 screws) Degaussing coil Tuner A/V jacks Flyback (T551) Note: After servicing receiver, remember to dress the cables, as shown. Figure 29.
  • Page 29 Identification of Components Q551 T551 H. OUT KEYPAD IC451 V. OUT IC803 POWER S. F801 IC003 FUSE SENSOR IC2321 AUDIO IC2302 AUDIO AMP IC6501 IC002 IC101 IC001 TNR001 COMB FILTER EEPROM TUNER Figure 30. A-Board Main Components - 29 -...
  • Page 30 Identification of Components C-BOARD Q353 Q352 Q351 CRT SOCKET R760 R761 Q751 Z-BOARD Q752 Q753 Figure 31. Component Identification, C&Z Boards - 30 -...

  • Page 31: Parts List

    REPLACEMENT PARTS LIST Model:CT-20SX11E/CE Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO. PART NO. DESCRIPTION C604...
  • Page 32 REPLACEMENT PARTS LIST Model:CT-20SX11E/CE Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO. PART NO. DESCRIPTION C6517...
  • Page 33 REPLACEMENT PARTS LIST Model:CT-20SX11E/CE Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO. PART NO. DESCRIPTION IC6502...
  • Page 34 REPLACEMENT PARTS LIST Model:CT-20SX11E/CE Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO. PART NO. DESCRIPTION R035 ERJ6GEYJ332V RES,M 3.3K-J-1/10W...
  • Page 35 REPLACEMENT PARTS LIST Model:CT-20SX11E/CE Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO. PART NO. DESCRIPTION R559...
  • Page 36 REPLACEMENT PARTS LIST Model:CT-20SX11E/CE Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO. PART NO. DESCRIPTION R6503...
  • Page 37 C-BOARD SCHEMATIC,LAYOUT & VOLTAGES--DIAGRAMA ELECTRICO Y VOLTAJES TARJETA C ALL MODELS IDENTIFICACIÓN DE TERMINALES CHIP TRANSISTOR PARA TRANSISTORES EN CHIP LEAD DESIGNATION Nota: Note: Q351 La medición de los voltajes se Obtained voltages with a 3.23 hizo con un Voltímetro Digital. multimeter.

  • Page 38: Schematic, Layout & Voltages

    ALL MODELS A-BOARD SCHEMATIC LEFT PORTION -- DIAGRAMA ELECTRICO DE LA TARJETA A, SECCION IZQUIERDA - 39 -...

  • Page 39: A-Board Schematic

    A-BOARD SCHEMATIC RIGHT PORTION -- DIAGRAMA ELECTRICO TARJETA A SECCION DERECHA ALL MODELS IMPORTANT SAFETY NOTICE THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES THAT ARE IMPORTANT FOR PROTECTION FROM X-RADIATION, FIRE AND ELECTRICAL SHOCK HAZARDS. WHEN SERVICING IT IS ESSENTIAL THAT ONLY MANUFACTURERS SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS DESIGNATED WITH A THE SCHEMATIC.

  • Page 40: Right Section

    ALL MODELS A-BOARD LAYOUT -- DIAGRAMA IMPRESO DE LA TARJETA A - 41 -...

  • Page 41: A-Board Layout

    VOLTAGES A-BOARD -- VOLTAJES TARJETA A ALL MODELS Q001 Q002 Q003 Q004 Q2302 IC001 IC2201 IC101 IC6501 0.75 5.86 5.01 4.89 24.30 ..4.40 ..0.00 ..1.20 .

  • Page 42: A-Board Voltages

    ALL MODELS Z-BOARD SCHEMATIC,LAYOUT & VOLTAGES -- DIAGRAMA ELECTRICO,CIRCUITO IMPRESO Y VOLTAJES TARJETA Z IMPORTANT SAFETY NOTICE THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES THAT ARE IMPORTANT FOR PROTECTION FROM X-RADIATION, FIRE AND ELECTRICAL SHOCK HAZARDS. WHEN SERVICING IT IS ESSENTIAL THAT ONLY MANUFACTURERS SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS DESIGNATED WITH A THE SCHEMATIC.

  • Page 43: Schematic, Layout & Voltages

    WAVEFORMS A-BOARD -- FORMAS DE ONDA TARJETA A ALL MODELS Waveforms - A-Board 3.58MHz X’tal 2.0V p-p [20µs] IC101 PIN 1 1.5-1.9V p-p [20µs] 30.8V p-p [5ms] 7.5V p-p [20µs] 326.9V p-p [5µs] 3.58VCO IC101 PIN 41 (SYNC) IC451 PIN 13 IC803 PIN 2 IC101 PIN 33 (DET OUT) IC101 PIN 16 (H SYNC)
  • Page 44 - 45 -...
  • Page 45 PARTS LIST ABBREVIATIONS GUIDE RESISTOR TYPE TOLERANCE Carbon ± 1% Fuse ± 5% Metal Oxide ± 10% Solid ± 20% Wire Wound ± 2% RES, C 270-J-1/4 CAPACITOR TYPE TOLERANCE Ceramic ± 0.25pF Electrolytic ± 0.5pF Polyester ± 1pF Styrol ±...
  • Page 46 ® Printed in USA K01072593CM0718 - 47 -...

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Ct-20sx11ceAp380

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