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Panasonic CT-20SX10B Service Manual
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Panasonic CT-20SX10B Service Manual

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Service Manual
This Service manual is issued as a service guide for the models of the MJ4M family listed above. Included in this
manual are a set of schematic, 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 de ath."
The service technician is required to read and follow the "Safety Precautions" and "Important Safety Notice" in this Main Manual.
Color Television
Models
CT-20SX10B
CT-20SX10CB
CT-24SX10B
CT-24SX10CB
CT-F2110XB
CT-F2510XB
®
ORDER NO. MTNC000855C1
B1
Main Manual
(MJ4M)
Panasonic
Chassis
Copyright 2000 by Matsushita Electric Corporation of
America. All rights reserved. Unauthorized copying
and distribution is a violation of law.
AP354
AP354
AP353
AP353
XP353
XP353

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Summary of Contents for Panasonic CT-20SX10B

  • Page 1 ORDER NO. MTNC000855C1 Service Manual Color Television Main Manual (MJ4M) Panasonic Models Chassis CT-20SX10B AP354 CT-20SX10CB AP354 CT-24SX10B AP353 CT-24SX10CB AP353 CT-F2110XB XP353 CT-F2510XB XP353 This Service manual is issued as a service guide for the models of the MJ4M family listed above. Included in this manual are a set of schematic, 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 Helpful Hints ..... 20 Sub-Data Adjustment .

  • 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: X-Ray Protection Circuit Test

    Service Notes (Continued) IMPORTANT For optimum performance and reliability, all other parts : To protect against possible damage to should replaced with components the solid state devices due to arcing or static discharge, identical specification. make certain that all ground wires and CTR DAG wire are securely connected.

  • Page 6: Receivers Feature Table

    Receiver Feature Table CT-24SX10B & CT-20SX10B & FEATURE\MODEL CT-F2510XB CT-F2110XB CT-24SX10CB CT-20SX10CB Chassis MJ4M MJ4M MJ4M MJ4M # of channels Menu language ENG/ESP/FR ENG/ESP/FR ENG/ESP/FR ENG/ESP/FR Closed Caption V-Chip (USA/CANADA) 75 Ohm Input Remote Model # EUR511502 EUR511502 EUR511502 EUR511502...

  • Page 7: Board Designation

    Board Designation CT-24SX10B & CT-20SX10B & Board Part No. Description CT-F2510XB CT-F2110XB CT-24SX10CB CT-20SX10CB A-Board TNP2AH022 Main Chassis C-Board TNP2AA068 CRT Drive G-Board TNP2AA071 Audio Circuit A/V Input H-Board TNP2AA070 Switch Q-Board TNP2AA067 H-Drive IMPORTANT When ordering boards, please add an “S” to the part number, for example TNP2AH022AA should be ordered as TNP2AH022AAS.

  • Page 8: Location Of Controls (Receiver)

    Location of Controls (Receiver) Remote Control Sensor ACTION TV/VIDEO VOLUME CHANNEL S-VHS A/V INPUT INPUT 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 9: Location Of Controls (Remote)

    Location of Controls (Remote) POWER Button LIGHT Press to turn ON and OFF. Press to light Remote control buttons MUTE Button TV/VIDEO Button Press to mute sound. Press to select TV or any Video input. A second press resumes sound. CH (channel) Buttons Press also to access and delete Closed Caption display.

  • Page 10: Disassembly For Service

    Disassembly for Service H-Board - A/V Jacks, S-Video Connectors and Video Switch Back Cover Plugs onto the A-Board at the A11 (H11) connector Remove all the screws marked with an arrow( Q-Board - Horizontal Drive from the back of the Receiver. Plugs onto the A-Board at the A6, A7 and A8 Note: Screw configuration, type, and number of (QC6, QC7 and QC8) connectors.

  • Page 11: Identification Of Main Components

    Identification of Main Components Anode Secured to Cabinet Yoke Wedges (High Voltage) Deflection Yoke C-Board by 4 screws on corners Speaker Dome DAG Gnd. Deg Coil Tuner H-Board A-Board T551 Q-Board Flyback Main Chassis Figure 5. Components Identification Note: After servicing the receiver, remember to dress the cables, as shown above.
  • Page 12 Identification of Main Components Speaker Dome After servicing the receiver, remember to dress the AC cord as shown Figure 6. RECEIVER REAR VIEW DETAIL Figure 7. Note: After servicing the receiver, remember to dress the cables, as shown above. - 12 -...
  • Page 13 Identification of Main Components Figure 8. View of Main Board Assemblies. LOCATION OF COMPONENTS INTEGRATED CIRCUITS IC005 OTHERS IC001 MPU IC801 Tuner IC6501 Comb Filter CONNECTORS Fuse IC101 VCJ A22,A23 Relay IC 451 D801 IC 002 TRANSISTORS T551 FBT IC 811 COUPLER Q551 T801 - 13 -...
  • Page 14 Identification of Main Components C-Board H-Board IC2352 IC351 CRT Socket Q955 Q950 G-Board Remote Power Sensor Bottom IC2301 IC2302 IC2401 IC750 Q755 Q754 Q501 Q-Board Figure 9. C, H, G and Q Board Main Components. - 14 -...

  • Page 15: Purity And Convergence Procedures

    Purity and Convergence Procedure Vertical Raster Shift Adjustment Adjustment is necessary only if the CRT or the deflection yoke is replaced or if the setting was Apply a green pattern with a horizontal line, adjust the disturbed. The complete procedure consists of: Deflection Yoke so that has no tilt, then secure it.
  • Page 16 Adjust the Purity rings to set the vertical green raster Align The converged red/blue dots with the green dots precisely at the center of the screen (see Fig. 13). at the center of the screen by rotating the R&B&G pole Static Convergence Magnets.
  • Page 17 As the yoke is tilted vertically, the rasters produced outside guns rotate in opposite directions. Figure 14. 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 18: 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 IC801’s heat sink when the HOT ground symbol ( ) is used.

  • Page 19: High Voltage Check

    High Voltage Check Deflection Circuit Preadjustment 1. Select an active TV channel and confirm that Preparation: 1. Connect a High voltage meter (Capable of handle horizontal is in sync. 50kV) to the CRT anode. 2. Adjust Brightness and Picture using Picture Icon 2.

  • Page 20: Serviceman Mode (Electronic Controls)

    Serviceman Mode (Electronic Controls) This Receiver has electronic technology using the I²C 6. “CHK” = Normal operation of CHANNEL Bus Concept. It performs as a control function and it and VOLUME replaces many mechanical controls. Instead of adjusting mechanical controls individually, many of the control functions are now performed by using “On address Menu...

  • Page 21: Sub-Data Adjustment

    Press the Power Button on the Remote Control to select the Serviceman 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. 17 ) for Remote Control to select one of Remote Control to adjust the each address...

  • Page 22: Geometric Adjustment

    Press the Power Button on the Remote Control to select the Serviceman 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. 17 ) for Remote Control to adjust the each address...

  • Page 23: Geomagnetic Adjustment

    Press the Power Button on the Remote Control to select the Serviceman 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. 17 ) for Remote Control to select one of Remote Control to adjust the the available Service Adjustments each...

  • Page 24: Instructional Flow Chart For Serviceman Mode

    Instructional Flow Chart for Serviceman Mode IMPORTANT NOTE: Always Exit the Serviceman Mode Following Adjustments. NORMAL MODE Momentarily short FA1 to FA2 ( AGING MODE • Yellow “CHK” appears in upper left corner of screen. WHITE SCREEN • Volume Up/Down operate rapidly. •...
  • Page 25 Instructional Flow Chart for Serviceman Mode - Continued CUT-OFF ADJUSTMENTS. C ITEMS. ON REMOTE CONTROL TO Adj. SELECT ADJUSTMENT needed? ON REMOTE TO ADJUST VOL VOL THE LEVEL POWER (ON REMOTE) GEOMETRIC ADJUSTMENTS. D ITEMS. ON REMOTE CONTROL TO Adj. SELECT ADJUSTMENT needed? ON REMOTE TO ADJUST...
  • Page 26 Instructional Flow Chart for Serviceman Mode - Continued GEOMAGNETIC ADJUSTMENTS. *X ITEMS. ON REMOTE CONTROL TO Adj. SELECT ADJUSTMENT needed? POWER (ON REMOTE) ON REMOTE TO ADJUST VOL VOL THE LEVEL EXIT Press Action and Power on the Receiver simultaneously for at least 2 seconds. *NOTE THOSE ADJUSTMENTS ARE FACTORY PRESET.

  • Page 27: Service Adjustments

    Service Adjustments (Electronic Controls) Note: The pattern used in this procedure is an EIA color Note: Turn the Receiver ON. Operate the Receiver bar pattern with 87.5% modulation with 100 IRE for 60 minutes using the first Purity Check field white and 7.5 black.

  • Page 28: Color Temperature Adjustment (W/B)

    Service Adjustments (Electronic Controls, cont.) Procedure: 2. Apply a color bar signal with color “OFF”. 3. Set Picture Icon Menu Video controls to Normalize. 1. Apply a Color bar pattern. 4. Turn the SCREEN control (part of FBT T551) fully 2.

  • Page 29: Horizontal Centering

    Service Adjustments (Electronic Controls, cont.) Horizontal Width Adjustment Note: Turn the Receiver ON. Operate the Receiver Serviceman DAC Adjustment (Dd) for 60 minutes using the first Purity Check field Preparation: (white screen) to stabilize the CRT. Fully 1. Apply a monoscope pattern. degauss the Receiver by using an external 2.

  • Page 30: Vertical Linearity

    Service Adjustments (Electronic Controls, cont.) Vertical Linearity adjustment Serviceman DAC Adjustment (D3) Preparation: 1. Apply a crosshatch pattern. Procedure: 1. Adjust D3 Vertical linearity so that distance A = B. See Fig. 32. Figure 34. Vertical Correction Procedure: 1. If B-A < -1.5mm. See Fig. 34. •...
  • Page 31 Service Adjustments (Electronic Controls, cont.) Procedure: Procedure: 1. Apply the following signal from the RF signal 1. Select Stereo Mode in Audio menu generator: 2. Apply the following signal from the RF signal Video: 100 IRE flat field, 30% modulation. generator: Audio: 300Hz,...

  • Page 32: Audio Signal Path Block Diagram

    Audio Signal Path Block Diagram Figure 36. Audio Signal Path Block Diagram. - 32 -...

  • Page 33: Video-Chroma Signal Path Block Diagram

    Video-Chroma Signal Path Block Diagram Figure 37. Video-Chroma Signal Path Block Diagram. - 33 -...

  • Page 34: Ic001 Mpu In/Out Pins And Functions

    IC001 MPU IN/OUT Pins and Functions REMOTE SIGNAL OSC1 INPUT OSC2 OUTPUT MTS SW KEY SCAN ACTION COMB TROUGH F-MONO SW V SYNC VERSION RESET ST W/WO OSD R MMOD OSD G SYSCLK OSD B CHIJIKI SERVICE H SYNC S DEFEAT VREPH0 POWER CVBS0...

  • Page 35: Ic101 Vcj In/Out Pins And Functions

    IC101 VCJ IN/OUT Pins and Functions VM OUT N.C. BLACK DET INPUT R IN Y IN G IN B-Y IN OUTPUT B IN R-Y IN YS IN VCC (5V) HOLD DOWN REF CW OUT HOLD DOWN X’TAL V REG N.C. RGB MUTE N.C.

  • Page 36: Parts List

    REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 37 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 38 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 39 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 40 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 41 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 42 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 43 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 44 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 45 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 46 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 47 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 48 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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.
  • Page 49 REPLACEMENT PARTS LIST Models: CT-20SX10B, CT-20SX10CB, CT-24SX10B, CT-24SX10CB CT-F2110XB & CT-F2510XB 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. M016 TKP4G11950 REAR A/V BRACKET...
  • Page 50 DESCRIPTION OF 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 51 NOTES: - 51 -...
  • Page 52 C-BOARD SCHEMATIC DIAGRAM, LAYOUT & VOLTAGES - DIAGRAMA ELECTRICO, DE CIRCUITO IMPRESO Y VOLTAJES TARJETA C ALL MODELS IDENTIFICACIÓN DE TERMINALES PARA TRANSISTORES EN CHIP Q357 Q369 Q951 Q952 Q953 Q954 IC 351 0.69 14.83 6.79 1.48 9.51 8.18 ..1.71 0.00 0.00 11.90...
  • Page 53 ALL MODELS A-BOARD SCHEMATIC DIAGRAM, LEFT PORTION - DIAGRAMA ELECTRICO TARJETA A, SECCION IZQUIERDA - 53 -...
  • Page 54 A-BOARD SCHEMATIC, RIGHT PORTION - DIAGRAMA ELECTRICO TARJETA A, SECCION DERECHA ALL MODELS - 54 -...
  • Page 55 ALL MODELS A BOARD LAYOUT - DIAGRAMA DE CIRCUITO IMPRESO TARJETA A - 55 -...
  • Page 56 G-BOARD SCHEMATIC DIAGRAM, LAYOUT & VOLTAGES - DIAGRAMA ELECTRICO, DE CIRCUITO IMPRESO Y VOLTAJES TARJETA G ALL MODELS Q2301 Q2303 Q2304 IC2401 0.00 13.07 0.00 ..4.36 ..0.00 1.79 0.00 4.98 .
  • Page 57 ALL MODELS Q-BOARD SCHEMATIC DIAGRAM, LAYOUT & VOLTAGES - DIAGRAMA ELECTRICO, DE CIRCUITO IMPRESO Y VOLTAJES TARJETA Q IMPORTANT SAFETY NOTICE THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES Q501 Q751 Q754 Q755 IDENTIFICACIÓN DE TERMINALES CHIP TRANSISTOR THAT ARE IMPORTANT FOR PROTECTION FROM X-RADIATION, FIRE PARA TRANSISTORES EN CHIP LEAD DESIGNATION AND ELECTRICAL SHOCK HAZARDS.
  • Page 58 H-BOARD SCHEMATIC DIAGRAM, LAYOUT & VOLTAGES - DIAGRAMA ELECTRICO, DE CIRCUITO IMPRESO Y VOLTAJES TARJETA H ALL MODELS IC3001 ..3.80 ..3.64 ..4.42 ..3.55 Q2351 Q2352 Q2353...
  • Page 59 ALL MODELS A-BOARD WAVEFORMS & VOLTAGES - FORMAS DE ONDA Y VOLTAJES TARJETA A Q004 Q005 Q007 Q008 Q009 Q301 Q302 Waveforms - A-Board 3.29 0.32 0.00 0.74 0.74 0.00 0.64 0.00 1.19 3.44 0.00 0.00 7.70 0.00 3.29 Q303 Q401 Q451 Q480...
  • Page 60 PRINTED IN USA K00112538CM1122...

This manual is also suitable for:

Ct-20sx10cbCt-24sx10bCt-24sx10cbCt-f2110xbCt-f2510xb

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