Panasonic CT-25G6E Service Manual
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Panasonic CT-25G6E Service Manual

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Service Manual

CT-27G6E/DE/UE
This Service manual is issued as a service guide for the models of the NA7D family listed above. Included are
schematics, alignment procedures, disassembly procedures, and a 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 Manual.
Copyright 2001 by Matsushita Electric Corporation of America. All rights reserved. Unauthorized copying and distribution is a violation of law.
SP-2724E/UE
Color Television
Main Manual
(NA7D)
Panasonic
Models
CT-25G6E
CT-25G6CE
CT-25G6UE
CT-27G6E
CT-27G6DE
CT-27G6UE
Quasar
Models
SP-2724E
SP-2724UE
ORDER NO. MTNC010306C1
B5
Chassis
AP361
AP361
AP361
AP362
AP362
AP362
Chassis
EC363
EC363

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Summary of Contents for Panasonic CT-25G6E

  • Page 1: Service Manual

    ORDER NO. MTNC010306C1 Service Manual Color Television Main Manual (NA7D) Panasonic Models Chassis CT-25G6E AP361 CT-25G6CE AP361 CT-25G6UE AP361 CT-27G6E AP362 CT-27G6E/DE/UE CT-27G6DE AP362 CT-27G6UE AP362 Quasar Models Chassis SP-2724E EC363 SP-2724UE EC363 SP-2724E/UE This Service manual is issued as a service guide for the models of the NA7D family listed above. Included are schematics, alignment procedures, disassembly procedures, and a 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)....22 Safety Precautions .

  • Page 4: Service Notes

    Service Notes Note: Some components may be affixed with glue. Be careful not to break or damage 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.

  • Page 5: X-Ray Protection Circuit Check & Adjustments

    IMPORTANT: To protect against possible damage to X-Ray Protection Circuit Check & the solid state devices due to arcing or static Adjustments discharge, make certain that all ground wires and CRT This test must be performed as final check before the DAG wire are securely connected.

  • Page 6: Receivers Feature Table

    Receiver Feature Table FEATURE\MODEL CT-25G6E/CE/UE CT-27G6E/DE/UE SP-2724E/UE Chassis AP361 AP362 EC363 Tuning system # of channels Menu language Eng/Span/Fr Eng/Span/Fr Eng/Span/Fr Closed Caption V-Chip 75 Ω input FM radio Remote Model # EUR501455 EUR501450 EUR511514 Picture tube A63QDB891X A68QDN891X M68LGL061X...

  • Page 7: Location Of Receiver Controls

    Remote Control (Available on Sensor some models) Figure 2. Location of Controls (Quasar models displayed, Panasonic models vary). 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

    REW, PLAY, FF, TV/VCR, R-TUNE STOP, PAUSE, REC, Press to switch to previously VCR/DBS CH viewed channel or video mode. Component function buttons. EUR511514 (Typical) Figure 3. Location of Controls (Quasar models, Panasonic remotes vary). - 8 -...

  • 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 from the main board.

  • Page 10: Chassis Service Adjustment Procedures

    Chassis Service Adjustment Procedures Note: Connect the (-) lead of the voltmeter to the All service adjustments are factory preset and should require adjustment unless controls and/or appropriate ground. Use IC801’s heat sink associated components are replaced. when the HOT ground symbol ( ) is used. Otherwise, use COLD ground ( ) —...

  • Page 11: Purity Convergence Procedure

    Purity and Convergence Procedure Adjustment is necessary only if the CRT or the results, note part number and look for specifications at deflection yoke is replaced or if the setting was Service Center) disturbed. The complete procedure consists of: 1. Vertical Raster Shift Adjustment. (Only for Models with Purity/Convergence Assembly with 4 Pairs of Rings).

  • Page 12: Purity Adjustment

    Purity Adjustment Final Convergence Procedure (see Fig. 11 When the Receiver is in the Service Mode for making through Fig. 13) electronic adjustments, press the Recall button on the Note: Vertical size and focus adjustments must be Remote Control to enter Purity Check. (See the completed prior to performing the convergence Service Adjustments Electronic Controls procedure).
  • Page 13 Figure 11. Vertical Yoke Movement Figure 12. Horizontal Yoke Movement Figure 13. Convergence Magnets and Wedges Location Note: For models using 4 pairs of rings assemblies see Fig. 6 for details - 13 -...

  • 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 B 00 33 C 00 0 255 control functions are now performed by using “On Screen Display Menu”.
  • Page 15 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 16 Default Cut-Off Adjustment Level ACL-COEF-factory preset ACL-COEF-factory preset ACL-WAIT-factory preset ACL-THRESHOLD-factory preset MACROVISION-factory preset OSD SELECT-factory preset KILLER ON-factory preset KILLER OFF-factory preset KILLER TIME-factory preset ACC THRESHOLD-factory preset ACC OFF-factory preset MUTE TIME-factory preset Default MTS Adjustment Level INPUT HIGH-LEVEL SEPARATION LOW-LEVEL SEPARATION AGC ADJ-factory preset...
  • Page 17 Default VCJ Adjustment (Continued) Level ACC AMP ON-factory preset ACC AMP CTL-factory preset BGP POSITION-factory preset OSD R-factory preset OSD G-factory preset OSD B-factory preset NOISE KILLER TIME-factory preset NOISE KILLER (ACC)-factory preset HV TIMING-factory preset Default VCJ Adjustment (Black Expansion) Level FORCE BS-factory preset DET ON/OFF-factory preset...
  • Page 18 Default Default Level Other Adjustment Level (Without FM) (With FM) AFCT AFCB AFCC CLOCK TO B ITEMS To Check Purity: When Receiver is in Service Mode (red “CHK” is displayed), place a jumper in the AG connector between the terminals (shorting FB signal to ground). Press the Recall Button on the Remote Control to enter the White Purity Field Check Mode.
  • Page 19 Notes: - 19 -...

  • Page 20: Instructional Flow Chart For Service Mode

    Instructional Flow Chart for Service Mode IMPORTANT Always Exit the Service Mode Following Adjustments. NORMAL MODE Momentarily short FA1 to FA2 ( AGING MODE • Yellow “CHK” appears in upper left corner of screen. WHITE • Volume Up/Down operate rapidly. SCREEN •...
  • Page 21 CUT-OFF ADJUSTMENTS. C ITEMS. ON REMOTE CONTROL TO Adj. SELECT ADJUSTMENT needed? ON REMOTE TO ADJUST VOL VOL THE LEVEL POWER (ON REMOTE) M, S, P & X Adjustments procedures are similar to the B Adjustments. ON REMOTE CONTROL TO Adj.

  • Page 22: Service Adjustments

    Service Adjustments (Electronic Controls) Note: It is recommended to allow for a 30 minute Tint/Color Adjustment warm up period, at high brightness level (use Service DAC Adjustment (B1) (B0) white screen), prior to any picture adjustment. Preparation: 1. Apply a rainbow color bar signal. Sub-Contrast 2.

  • Page 23: White Balance

    • C5: Drive_B ..80 White Balance Touch-Up Procedure: 3. Confirm using Black & White pattern and a white Use this procedure to make minor adjustment to white screen the color balance (gray scale and white balance.

  • Page 24: Vertical Size

    Audio: 300Hz, 100% modulation, monaural (70 ±5dB, 75Ω OPEN, P/S 10dB). 2. Adjust the MTS Input Level Adjustment (M0) until the voltage measured is 106 ± 6.0mV rms. Stereo Separation Adjustment (M1 & M2) Preparation: 1. Connect an RF signal generator to the RF antenna input.

  • Page 25: Service Adjustments (Mechanical Controls)

    Service Adjustments (Mechanical Controls) Focus (part of T551) Preparation: Connect a Signal generator and select a dot pattern. Procedure: Adjust the FOCUS control VR to obtain the sharpest and clearest dot pattern. a. Adjust for best center. b. Adjust for best area between the center and top right corner.

  • Page 26: Component Identification

    Identification of Components Screw Screw Screw Screw Screw Screw Screw Screw Figure 26. Back Cover Removal (CT-25G6E/CE/UE & CT-27G6/DE/UE) Screw Screw Screw Screw Screw Screw Screw Screw Figure 27. Back Cover Removal (SP-2724E/UE) - 26 -...
  • Page 27 CRT (secured to cabinet by 4 Anode (high voltage) screws on corners of CRT) Yoke C board DAG ground Degaussing coil Speaker (4 screws) Speaker (4 screws) Tuner Flyback (T551) A/V jacks Note: After servicing the Receiver, dress cables and wires as indicated.
  • Page 28 IC050 Halftone IC001 Components on trace side IC003 IC801 Front A/V IC002 Remote Sensor IC451 Jacks EEPROM Vertical Out D801 Rect Bridge Q501 H-Drive IC005 3.3 V IC2301 IC551 Right IC552 Q551 9V Reg Audio 5V Reg H-Out RL801 TNR001 S-VHS A/V Jacks Relay...

  • Page 29: Parts List

    C-BOARD -- TARJETA C C-BOARD SCHEMATIC, LAYOUT & VOLTAGES -- DIAGRAMA ELÉCTRICO, CIRCUITO IMPRESO Y VOLTAJES TARJETA C ALL MODELS -- TODOS LOS MODELOS Notes: • Check Parts List for most recent component values and part numbers. • Obtain voltages with a digital multimeter. •...
  • Page 30 A-BOARD -- TARJETA A A-BOARD SCHEMATIC LEFT PORTION -- DIAGRAMA ELÉCTRICO TARJETA A SECCIÓN IZQUIERDA CT-25G6E/CE/UE - 40 -...
  • Page 31 A-BOARD -- TARJETA A A-BOARD SCHEMATIC RIGHT PORTION -- DIAGRAMA ELÉCTRICO TARJETA A SECCIÓN DERECHA CT-25G6E/CE/UE CHIP TRANSISTOR LEAD DESIGNATION IDENTIFICACIÓN DE TERMINALES PARA TRANSISTORES EN CHIP - 41 -...
  • Page 32 A-BOARD - TARJETA A A-BOARD SCHEMATIC LEFT PORTION -- DIAGRAMA ELÉCTRICO TARJETA A SECCIÓN IZQUIERDA CT-27G6E/CE/UE & SP2724E/UE - 42 -...
  • Page 33 A-BOARD -- TARJETA A A-BOARD SCHEMATIC RIGHT PORTION -- DIAGRAMA ELÉCTRICO TARJETA A SECCIÓN DERECHA CT-27G6E/CE/UE & SP2724E/UE CHIP TRANSISTOR LEAD DESIGNATION IDENTIFICACIÓN DE TERMINALES PARA TRANSISTORES EN CHIP - 43 -...
  • Page 34 A-BOARD -- TARJETA A A-BOARD VOLTAGES -- VOLTAJES TARJETA A ALL MODELS -- TODOS LOS MODELOS IC001 IC002 IC050 IC551 IC2201 IC2301 ..GND ..GND ..GND .

  • Page 35: Components Abbreviations Guide

    WAVEFORMS -- FORMAS DE ONDA A-BOARD WAVEFORMS -- FORMAS DE ONDA TARJETA A ALL MODELS - TODOS LOS MODELOS All Models -- To- dos los Modelos CHIP TRANSISTOR LEAD DESIGNATION 1.3V p-p [20µs] 1.7V p-p [20µs] 1.3V p-p [5ms] 3.1V p-p [20µs] 2.9V p-p [5µs] TPA5 (VIDEO) (R OUT)
  • Page 36 A & C-BOARDS -- TARJETAS A Y C A & C-BOARDS LAYOUT -- CIRCUITO IMPRESO DE LAS TARJETAS A Y C ALL MODELS - TODOS LOS MODELOS - 46 -...
  • Page 37 SERVICE MODE (ELECTRONIC CONTROL) SERVICE ADJUSTMENT VALUES Model _____________________________________________ Ser #_____________ Date_________________ Note: Record the original settings PRIOR to modifying the registers. Service Adjustment Def. Original Service Adjustment Def. Original Mode Mode Adjustment Range Val. Value Value Adjustment Range Val. Value Value Cut-Off Adjustments, Cont.
  • Page 38 SERVICE MODE, CONT. (ELECTRONIC CONTROL) SERVICE ADJUSTMENT VALUES Model _____________________________________________ Ser #_____________ Date_________________ Note: Record the original settings PRIOR to modifying the registers. Service Adjustment Def. Original Service Adjustment Def. Original Mode Mode Adjustment Range Val. Value Value Adjustment Range Val.

  • Page 39: Schematic Notes

    Schematic Notes IMPORTANT SAFETY NOTICE CHIP TRANSISTOR THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL LEAD DESIGNATION FEATURES THAT ARE IMPORTANT FOR PROTECTION FROM X-RADIATION, FIRE AND ELECTRICAL SHOCK HAZARDS. WHEN SERVICING ESSENTIAL THAT ONLY MANUFACTURERS SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS DESIGNATED WITH A IN THE SCHEMATIC.

  • Page 40: Ct-25G6/Ce/Ue

    Schematic Notes NOTA DE SEGURIDAD DIAGRAMAS ELÉCTRICOS INCLUYEN CARACTERÍSTICAS ESPECIALES MUY IMPORTANTES IDENTIFICACIÓN DE TERMINALES PARA TRANSISTORES EN CHIP PARA PROTECCIÓN CONTRA RAYOS-X, QUEMADURAS Y DESCARGAS ELÉCTRICAS. CUANDO SERVICIO IMPORTANTE USAR PARA REEMPLAZO COMPONENTES CRITICOS, SOLO PARTES ESPECIFICADAS POR EL FABRICANTES. LOS COMPONENTES CRITICOS ESTAN SEÑALADOS EN LOS DIAGRAMAS POR EL SIMBOLO NOTAS DE LOS DIAGRAMAS...
  • Page 41 Schematic Notes NOTES: - 38 -...

  • Page 42: Ct-27G6E/Ce/Ue)

    REPLACEMENT PARTS LIST Models: CT-25G6E/CE/UE, CT-27G6E/DE/UE & SP-2724E/UE 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.

  • Page 43: Replacement Parts List

    REPLACEMENT PARTS LIST Models: CT-25G6E/CE/UE, CT-27G6E/DE/UE & SP-2724E/UE 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.

  • Page 44: A-Board Voltages

    REPLACEMENT PARTS LIST Models: CT-25G6E/CE/UE, CT-27G6E/DE/UE & SP-2724E/UE 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.

  • Page 45: Waveforms

    REPLACEMENT PARTS LIST Models: CT-25G6E/CE/UE, CT-27G6E/DE/UE & SP-2724E/UE 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.

  • Page 46: A & C-Boards Layouts

    REPLACEMENT PARTS LIST Models: CT-25G6E/CE/UE, CT-27G6E/DE/UE & SP-2724E/UE 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.

  • Page 47: Service Mode Adjustments

    REPLACEMENT PARTS LIST Models: CT-25G6E/CE/UE, CT-27G6E/DE/UE & SP-2724E/UE 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.
  • Page 48 REPLACEMENT PARTS LIST Models: CT-25G6E/CE/UE, CT-27G6E/DE/UE & SP-2724E/UE 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.

This manual is also suitable for:

Ct-25g6ceCt-25g6ueCt-27g6eCt-27g6deCt-27g6ueQuasar sp-2724e ... Show all

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