Panasonic CT-32E14J Service Manual
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Panasonic CT-32E14J Service Manual

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MTNC040103A1
B05
Color Television
CT-32E14J / CT-32E14UJ
GN3_(NA10)
This simplified service manual is issued to add listed models to the
main service manual order No. MTNC030623C1(CT-25L8G). A
complete parts list and schematics are included in this simplified
service manual. Please file and use this simplified servicemanual
together with the main service manual order No. MTNC030623C1(CT-
25L8G).

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Summary of Contents for Panasonic CT-32E14J

  • Page 1 MTNC040103A1 Color Television CT-32E14J / CT-32E14UJ GN3_(NA10) This simplified service manual is issued to add listed models to the main service manual order No. MTNC030623C1(CT-25L8G). A complete parts list and schematics are included in this simplified service manual. Please file and use this simplified servicemanual together with the main service manual order No.

  • Page 2: Safety Precautions

    1. Safety precautions General guidelines An isolation transformer should always be used during the servicing of a receiver whose chassis is not isolated from AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injuryfrom electrical shocks. It will also protect the receiver from being damaged by accidental shorting that may occur during servicing.
  • Page 3 terminals, control shafts, etc. If the exposed metallic part has a returnpath to the chassis, the reading should be between 240k and 5.2M . If the exposed metallic part does not have a return path to the chassis, the reading should be infinite. Leakage current hot check Plug the AC cord directly into the AC outlet.

  • Page 4: Service Notes

    the possibility of prematurecomponent failure. Horizontal oscillator disable circuit test This test must be performed as a final check before the receiver is returned to the customer. See horizontal oscillator disable circuit procedure check in this manual. 2. Service notes NOTE These components are affixed with glue.
  • Page 5 2. Hold the chip component against the soldering pads with tweezers or with a miniature alligator clip and apply heat to the pad area with a 30 watt iron until solder flows. Do not apply heat for more than 3 seconds. How to replace flat ic (required tools) 1.
  • Page 6 4. Position the new Flat IC in place (apply the pins of the Flat IC to the soldering pads where the pins need to be soldered). Properly determine the positions of the soldering pads and pins by correctly aligning the polarity symbol 5.
  • Page 7 chassis. Connect the test equipment to the proper ground(hot) or (cold) when servicing, or incorrect voltages will be measured. 2.1. X-Ray Protection Circuit Check & Adjustments This test must be performed as final check before the receiver is returned to the customer. If voltages are out of tolerance, immediate service and correction is required to insure safe operation and to prevent the possibility of premature componentfailure.

  • Page 8: Eeprom Replacement

    5. Apply a monoscope pattern. 6. Set customer picture and brightness controls to the minimum. 7. Set current within 50 A to 100 A by changing the picture and bright controls. 8. Slowly increase A.C. voltage at the input of the isolation transformer and confirm HHS voltage measure 34kV.

  • Page 9: About Lead Free Solder (Pbf)

    the same procedure as step 4. 6. When replacing a new EEPROM be sure to set the correct ID switch values for each model. 7. Once that all 3 registers are set with the correct address value, perform all of the remaining adjustments and servicing. IMPORTANT: Correct ID switch configuration should be input when replacing EEPROM for each television model, otherwise if wrong values are...

  • Page 10: Receiver Feature Table

    opposite side. Suggested Pb free solder There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also beused. 5. Receiver feature table...

  • Page 11: Board Description Table

    FEATURE/MODEL CT-27E13G CHASSIS JP424 MICRO 128K MENU LANGUAGE ENG/SPAN/FR CLOSED CAPTION V-CHIP (USA/CANADA) CHANNEL COUNT REMOTE CONTROL EUR7613ZB0 CRT SUPPLIER MDDA CHASSIS COMB FILTER 3 DIGITAL COLOR TEMP HEC/VEC (X=BOTH) V/A NORM (X=BOTH) MTS/SAP/DBX BUILT-IN AUDIO POWER 5Wx2 (10%) No. OF SPEAKERS SURROUND SOUND AI SOUND BASS / BAL / TREBLE...

  • Page 12: Location Of Controls (Remote)

    EXAMPLE To order the A-Board, the replacement board is TNP2AH060KCS. 7. TV Location of controls 8. Location of controls (remote) 8.1. EUR7613ZB0...
  • Page 13 Note: For additional information about this remote please refer to the owner’s manual section remote operation, listed on the parts list section. 9. Dissasembly for service Back cover Remove all the screws marked with an arrow ( ) from the back of the receiver NOTE Screw configuration, type, and number of screws vary depending on the model of the receiver serviced and the application;...
  • Page 14 1. Slide the chassis completely out of the guide rails. 2. Stand the receiver on its edge. The underside of the board is completely accessible for component replacement. Note: Some tie-wraps that secure the wire dressings may need to be unfastened for chassis removal. C-Board - CRT output The board plugs onto the socket on the CRT neck.
  • Page 15 6. Lift the main chassis (A-Board) and all mounted boards completely out with the CRT board attached. 7. Perform complete removal of chassis, as instructed in “disassembly for service” section. CRT replacement 1. Perform “disassembly for CRT replacement” procedure. 2. Insure that the CRT H.V. Anode button is discharged before handling the CRT.

  • Page 16: Chassis Service Adjustment Procedures

    9.2. Back Cover Removal 10. 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 17 Note: Components and test points within doted areas are located on trace side. B+ voltage check 1. Set the BRIGHT and PICTURE to minimum by using the PICTURE menu. 2. Connect the DVM between C825 (+ side) or TPD14 and cold ground.
  • Page 18 A-BOARD TEST VOLTAGE POINT TPD14 131.0 ± 2.0V SOUND C823 (+) 22.7 ± 1.0V STB12V C827 (+) 12.8 ± 1.0 V 220V TPA14 217 ± 10 V VERTICAL TPD8 27.4 ± 1.5V IC551 pin 3 9.0 ± 0.5V IC552 pin 3 5.0 ±...
  • Page 19 5. Adjust VOLUME to minimum (0). 6. Press VOL (decrease) on receiver. Red “CHK” appears in upper corner. To toggle between aging and service modes: While the “CHK” is displayed on the left top corner of the CRT, pressing “ACTION” and “VOL” UP on the TV simultaneously will toggle between the modes.
  • Page 20 purity field check mode Entering service mode (open-back method) While the receiver is connected and operating in normal mode, momentarily short test point FA1 (TP1 pin 2) to cold ground (TP1 pin 3). The receiver enters the aging mode. Yellow letters “CHK” appear in the upper left corner of the screen. / (The volume right/left and channel up/down will adjust rapidly).

  • Page 21: Service Adjustments (Electronic Controls)

    NAME DESCRIPTION REGISTER VALUE TRAP TRAPEZOID PCCHG PINCUSHION HIGH PCCLG PINCUSHION LOW PCCHS PINCUSHION HIGH PCCLS PINCUSHION LOW TOPSL TOP CORNER PINCUSHION SLICE LEVEL BTMSL BOTTOM CORNER PINCUSHION SLICE LEVEL VEAMP VERTICAL SIZE VERTICAL LINEARITY VERTICAL SIZE CORRECTION VPOS VERTICAL POSITION NAME DESCRIPTION VALUE...
  • Page 22 2. Set the PICTURE control to the maximum. 3. Set COLOR control to minimum (no color on picture). 4. Set the BRIGHTNESS control to the center. 5. Set the SHARPNESS control to the center. 6. Connect the oscilloscope to TP47G. Procedure 1.
  • Page 23 3. Set the COLOR control to the center. 4. Set the TINT control to the center. 5. Set the PICTURE control to the maximum. 6. Set the SHARPNESS control to the minimum. PROCEDURE 1. Apply a rainbow color bar pattern. 2.
  • Page 24 (NO RAINBOW PATTERN) Make sure that sub-contrast adjustment was finished prior to perform this adjustment PREPARATION Normalize the picture settings. PROCEDURE 1. Apply a color bar pattern. 2. In service mode adjust “R DR” and “B DR” data to “80”. 3.
  • Page 25 adjustments, select drive R DR, B DR and adjust the picture for warm whites. Complete adjustment PREPARATION 1. Turn the receiver “ON” and allow 30 minutes warm up at WHITE PATTERN. 2. Apply a color bar pattern (with no color). 3.
  • Page 26 10. Apply a normal signal and confirm that the image is normal and a good gray scale. 11. If correction is needed perform minor touch-up method. 12.5. Deflection adjustments To reset deflection adjustments To reset deflection adjustments to factory adjusted default, enter to service mode (with red CHK displayed), press POWER button on remote to display the service menu, then press and hold RECALL button for at least three seconds, a reset message will appear in the image.
  • Page 27 2. If the horizontal center is not aligned, in service mode adjust “H POS” DATA to adjust the horizontal center of the monoscope pattern to the CRT center. 3. Verify that horizontal width (A & B mark) is within 4.5 ± 0.7. 12.5.2.
  • Page 28 3. If the v-position is not at the CRT center, adjust / V position “V POS” DATA again. 4. Apply a monoscope pattern. 5. Confirm that center horizontal line is in center mark on CRT. 6. Adjust “VEAMP” register for correct vertical size by making monoscope round circle leaving 4 marks off the CRT edge.
  • Page 29 Repeat “a” and “b” until b-a ± 1.5mm 3. Confirm to make outermost circle of monoscope pattern a correct circle V-Adjustment 12.5.5. Trapezoid adjustment (TRAP) PREPARATION 1. Apply a crosshatch pattern. 2. Normalize the picture icon video adjustments. Procedure: 1. Enter service mode, select “TRAP” and adjust DATA so that lines at right and left are vertical like a solid line.
  • Page 30 1. Adjust “PCC” data so that the first and third line make a good balance (see figure below). PCC Adjustment 12.5.7. Corner PCC adjustment / (TOPG, TOPSL, BTMG, BTMSL) This controls help to adjust top and bottom sides of picture. PREPARATION 1.
  • Page 31 PREPARATION 1. Connect an RMS meter with filter jig as shown in figure to TPE11. Filter Jig 2. Connect an RF signal generator to the RF antenna input. PROCEDURE 1. Apply the following signal from the RF signal generator: - Video: 100 IRE flat field, 30% modulation. - Audio: 300Hz, 100% modulation, monaural (70 ±5dB, 75 OPEN, P/S 10dB).

  • Page 32: Identification Of Components

    After setting 30% modulation with P.L. SW and N.R. SW OFF, turn P.L. SW and N.R. SW 3. In service mode, adjust the MTS Low-Level separation adjustment “SEPAL” data until the amplitude displayed on the scope is minimum. 4. Apply the following signal from the RF signal generator: - Video: 100 IRE flat field, 30% modulation - Audio: 3KHz, 30% modulation, stereo (left only) (70 ±5dB, 75 OPEN, P/S 10dB).
  • Page 33 13.1.1. C-Board Chassis C-Board component location 13.1.2. A-Board Chassis...
  • Page 34 13.1.3. A-Board Surface-mounted components A-Board (bottom view)

  • Page 36: Conductor Views

    14. Reference for PDF Colors 15. Conductor Views 15.1. A-Board Printed Circuit TNP2AH060 (Left Side) 15.2. A-Board TNP2AH060 (Right Side) & C Board TNP2AA167 Printed Circuit 16. Block Diagrams 16.1. Video Signal Block Diagram 16.2. Audio Signal Block Diagram 17. Schematics 17.1.
  • Page 38 17.2. Notas de Esquematicos en Espa ñ ol...

  • Page 40: Parts Location

    17.3. A-Board Schematic TNP2AH060KC (1 of 5) 17.4. A-Board Schematic TNP2AH060KC (2 of 5) 17.5. A-Board Schematic TNP2AH060KC (3 of 5) 17.6. A-Board Schematic TNP2AH060KC (4 of 5) 17.7. A-Board Schematic TNP2AH060KC (5 of 5) 17.8. C-Board Schematic TNP2AA167KA 17.9. Voltages 17.10.
  • Page 41 19.2. Parts List...
  • Page 42 Ref. No. Part No. Part Name & Description Remarks CAPRISTORS CRA801 TP00842-51 CAPRISTOR CAPACITORS C003 ECA1HM4R7B CAP,E 4.7UF-50V C004 TCJ2VC1H150J CAP,C 15PF-J-50V C005 TCJ2VC1H150J CAP,C 15PF-J-50V C008 TCJ2VF1H103Z CAP,C .01UF-Z-50V C009 ECJ2VF1H104Z CAP,C .1UF-Z-50V C010 TCJ2VC1H680J CAP,C 68PF-J-50V C011 TCJ2VC1H680J CAP,C 68PF-J-50V C012 ECJ2VB1C104K CAP,C .1UF-K-16V...
  • Page 43 Ref. No. Part No. Part Name & Description Remarks C041 ECA1HM2R2B CAP,E 2.2UF-50V C043 ECJ2VF1C105Z CAP,C 1.0UF-Z-16V C044 ECA0JM102B CAP,E 1000UF-6.3V C046 TCJ2VF1H103Z CAP,C .01UF-Z-50V C048 ECJ2VF1C105Z CAP,C 1.0UF-Z-16V C051 ECJ2VF1C105Z CAP,C 1.0UF-Z-16V C052 ECA1CM101B CAP,E 100UF-16V C053 ECJ2VF1C105Z CAP,C 1.0UF-Z-16V C054 ECJ2VF1C105Z CAP,C 1.0UF-Z-16V...
  • Page 44 Ref. No. Part No. Part Name & Description Remarks C531 ECA1HM4R7B CAP,E 4.7UF-50V C540 TCJ2VF1H103Z CAP,C .01UF-Z-50V C551 ECA1VHG471B CAP,E 470UF-35V C551 ECA1VM471B CAP,E 470UF-35V C554 ECKR2H561KB5 CAP,C 560PF-K-500V C555 ECA2EM220E CAP,E 22UF-250V C556 ECA1CM471B CAP,E 470UF-16V C557 ECKR2H102KB5 CAP,C 1000PF-K-500V C560 ECQB1104JF3 CAP,P .10UF-J-100V...
  • Page 45 Ref. No. Part No. Part Name & Description Remarks C826 ECKR3A471KBP CAP,C 470PF-K-1KV C827 ECA1CM102B CAP,E 1000UF-16V C828 ECA160V33UE CAP,E 33UF-160V C829 ECA1CM471B CAP,E 470UF-16V C830 ECA1CM471B CAP,E 470UF-16V C2201 ECA1HM4R7B CAP,E 4.7UF-50V C2202 ECA1HM2R2B CAP,E 2.2UF-50V C2203 ECA1HM4R7B CAP,E 4.7UF-50V C2204 AP106K016CAE CAP,T 1OUF-16V...
  • Page 46 C2532 ECA1HM4R7B CAP,E 4.7UF-50V...
  • Page 47 Ref. No. Part No. Part Name & Description Remarks C3001 ECA1CM220B CAP,E 22UF-16V C3002 ECA1CM220B CAP,E 22UF-16V C3011 ECJ2VF1C105Z CAP,C 1.0UF-Z-16V C3012 ECA1HM010B CAP,E 1UF-50V C3013 ECA1CM100B CAP,E 10UF-16V C3014 ECA1CM100B CAP,E 10UF-16V C3015 ECA1HM010B CAP,E 1UF-50V C3016 ECA1HM010B CAP,E 1UF-50V C3017 ECA1HM010B CAP,E 1UF-50V...
  • Page 48 Ref. No. Part No. Part Name & Description Remarks D821 MAZ40470HF DIODE, ZENER D822 B0HAMM000103 DIODE D823 S3L60P154004 DIODE D824 B0HAMM000072 DIODE, FAST RECOVERY D2302 MAZ43000MF DIODE, ZENER D2305 CVS20B120MTA DIODE, ZENER D2307 CVS20B120MTA DIODE, ZENER D2350 MAZ41000LF DIODE, ZENER D2353 MA2C165001VT DIODE...
  • Page 49 IC3002 MM1501XNRE INT CKT...
  • Page 50 Ref. No. Part No. Part Name & Description Remarks IC3101 74HC4066D653 INT CKT COILS L002 EXCELSA39V EMI BEAD CORE L005 EXCELSA35T FERRITE BEAD L006 EXCELSA35T FERRITE BEAD L007 ELESN330JA COIL, 33UH L008 G0C470KA0029 COIL, PEAKING 47UH L010 G0C2R2KA0029 COIL, PEAKING 2.2UH L011 EXCELSA26T FERRITE BEAD...
  • Page 51 Ref. No. Part No. Part Name & Description Remarks Q357 2SC584500L TRANSISTOR Q358 2SC584500L TRANSISTOR Q359 2SC584500L TRANSISTOR Q360 2SA207700L TRANSISTOR Q361 2SA207700L TRANSISTOR Q362 2SA207700L TRANSISTOR Q411 2SB0710AQL TRANSISTOR Q412 2SD0602AQL TRANSISTOR Q451 2SA207700L TRANSISTOR Q501 2SC4212HLB TRANSISTOR Q551 2SC5902000LK TRANSISTOR Q560...
  • Page 52 Ref. No. Part No. Part Name & Description Remarks R027 ERJ6GEYJ472V RES,M 4.7K-J-1/10W R032 ERJ6GEYJ103V RES,M 10K-J-1/10W R033 ERJ6GEYJ222V RES,M 2.2K-J-1/10W R034 ERJ6GEYJ222V RES,M 2.2K-J-1/10W R035 ERJ6GEYJ332V RES,M 3.3K-J-1/10W R036 ERJ6GEYJ512V RES,M 5.1K-J-1/10W R037 ERJ6GEYJ912V RES,M 9.1K-J-1/10W R038 ERJ6GEYJ223V RES,M 22K-J-1/10W R039 ERDS2TJ102T RES,C 1K-J-1/4W...
  • Page 53 Ref. No. Part No. Part Name & Description Remarks R352 ERG2FJ123H RES,M 12K-J-2W R353 ERG2FJ123H RES,M 12K-J-2W R354 ERC12GK272C RES,M 2.7K-C-.5W R355 ERC12GK272C RES,M 2.7K-C-.5W R356 ERC12GK272C RES,M 2.7K-C-.5W R357 ERJ6ENF2700V RES,M 270-F-1/10W R358 ERJ6ENF2700V RES,M 270-F-1/10W R359 ERJ6ENF2700V RES,M 270-F-1/10W R360 ERJ6ENF6800V RES,M 680-F-1/10W...
  • Page 54 Ref. No. Part No. Part Name & Description Remarks R506 ERG1SJ562P RES,M 5.6K-J-1W R507 EROS2THF1802 RES,M 18K-F-1/4W R509 ERJ6ENF1002V RES,M 10K-F-1/10W R510 ERG3FJ472 RES,M 4.7K-3W R511 ERG3FJ472 RES,M 4.7K-3W R512 ERJ6GEYJ222V RES,M 2.2K-J-1/10W R514 ERJ6GEYJ392V RES,M 3.9K-J-1/10W R515 ERJ6GEYJ101V RES,M 100-J-1/10W R520 ERJ6GEYJ471V RES,M 470-J-1/10W R530...
  • Page 55 Ref. No. Part No. Part Name & Description Remarks R827 ERJ6GEYJ153V RES,M 15K-J-1/10W R828 ERJ6GEYJ104V RES,M 100K-J-1/10W R829 ERJ6GEYJ104V RES,M 100K-J-1/10W R830 ERG2FJ273H RES,M 27K-J-2W R831 ERDS2TJ682T RES,C 6.8K-J-1/4W R832 ERJ6GEYJ122V RES,M 1.2K-J-1/10W R832 ERJ6GEYJ272V RES,M 2.7K-J-1/10W R833 ERJ6GEYJ473V RES,M 47K-J-1/10W R834 ERJ6GEYJ472V RES,M 4.7K-J-1/10W R837...
  • Page 56 R3016 ERDS2TJ181T RES,C 180-J-1/4W Ref. No. Part No. Part Name & Description Remarks R3017 ERDS2TJ181T RES,C 180-J-1/4W R3018 ERDS2TJ101T RES,C 100-J-1/4W R3021 ERDS2TJ101T RES,C 100-J-1/4W R3022 ERDS2TJ101T RES,C 100-J-1/4W R3023 ERDS2TJ101T RES,C 100-J-1/4W R3024 ERDS2TJ101T RES,C 100-J-1/4W R3025 ERDS2TJ101T RES,C 100-J-1/4W R3026 ERDS2TJ101T RES,C 100-J-1/4W...
  • Page 57 COIL, DEGAUSSING TXFKY01JSER ASSY CABINET FRONT TXFKU02GSER ASSY CABINET BACK TKX2AA00407 GUIDE, IR TAS2AA0016 SPEAKER 8-OHM 5W TBX2AA2601 BUTTON, 7-KEY TBM2AA0023 BADGE, PANASONIC M002 TBM2AX01201 OVERLAY, BACK COVER M003 TMM2A30702 WEDGE, YOKE M004 TSN63115-4 MAGNET, PURITY M005 TSX2AA0361 LINE CORD, AC...
  • Page 58 MTNC030623C1 B01/B05 Color Television CT-25L8G / CT-25L8UG / CT-20L8G / CT-20G8G / CT-20G8SG NA10 1. Safety precautions General guidelines...
  • Page 59 An isolation transformer should always be used during the servicing of a receiver whose chassis is not isolated from AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injuryfrom electrical shocks. It will also protect the receiver from being damaged by accidental shorting that may occur during servicing.
  • Page 60 rechecked before it is returned to the customer. Hot check circuit Insulation test Connect an insulation tester between an exposed metallic part and A.C. line. Apply 1080VAC/ 60Hz for 1 second. Confirm that the current measurement is 0.5mA ~ 2.0mA. Repeat test with other metallic exposed parts.
  • Page 61 Leadless chip component (surface mount) Chip components must be replaced with identical chips due to critical foil track spacing. There are no holes in the board to mount standard transistors or diodes. Some chips capacitor or resistor board solder pads may have holes through the board,however the hole diameter limits standard resistor replacement to 1/8 watt.
  • Page 62 How to replace flat ic (required tools) 1. Remove the solder from all of the pins of a Flat IC by using a desolder braid 2. Put the iron wire under the pins of the Flat IC and pull it in the direction indicated while heating the pins using a soldering iron.
  • Page 63 the soldering pads where the pins need to be soldered). Properly determine the positions of the soldering pads and pins by correctly aligning the polarity symbol 5. Solder all pins to the soldering pads using a fine tipped soldering iron 6.
  • Page 64 Equipment: 1. Isolation transformer. 2. High voltage meter. 3. D.C. Ammeter 4. Short jumper. 5. HHS jig (See figure below). Diode Connection Jumper. Preparation: 1. Make sure the receiver is turned off. 2. Connect the receiver to an isolation transformer. 3.
  • Page 65 8. Slowly increase AC voltage at the input of the isolation transformer and confirm HHS voltage measure 31kV for 20” models and 33kV for 25” models. 9. Turn power off and remove jigs. 3. EEPROM replacement If a new EEPROM integrated circuit is replaced for servicing, follow the next procedure once that the memory is properly assembled: 1.
  • Page 66 7. Once that all 3 registers are set with the correct address value, perform all of the remaining adjustments and servicing. IMPORTANT: Correct ID switch configuration should be input when replacing EEPROM for each television model, otherwise if wrong values are configured, the television software will not function accordingly and properly.
  • Page 67 Suggested Pb free solder There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also beused. 5. Receiver feature table...
  • Page 68 FEATURE/MODEL CT-25L8G/UG CT-20L8G CT-20G8G/SG CHASSIS AP403 BP398 AP398 MICRO 128K MENU LANGUAGE ENG/SPAN/FR CLOSED CAPTION V-CHIP (USA/CANADA) CHANNEL COUNT REMOTE CONTROL EUR7713010 CRT SUPPLIER PANABLACK, SAMSUNG CHASSIS NA10 COMB FILTER DIGITAL V/A NORM (X=BOTH) MTS/SAP/DBX BUILT-IN AUDIO POWER 1.5Wx2 (10%) No.
  • Page 69 BOARD PART NUMBER DESCRIPTION TNP2AH047FA MAIN BOARD TNP2AA122FA CRT BOARD NOTE When ordering a replacement board assembly, append an “S” to the board number EXAMPLE To order the A Board, the replacement board is TNP2AH047AAS. 7. TV Location of controls...
  • Page 70 8. Location of controls (EUR7713010 remote) Note: For additional information about this remote please refer to the owner’s manual section remote operation, listed on the parts list section. 9. Dissasembly for service Back cover Remove all the screws marked with an arrow ( ) from the back of the receiver...
  • Page 71 NOTE Screw configuration, type, and number of screws vary depending on the model of the receiver serviced and the application; variou’s models are covered in this manual. Use same hardware when reassembling the receiver. - 3 screws at the top edge of the receiver (for 25” sets). - 2 screws at the top edge of the receiver (for 20”...
  • Page 72 NOTE When reassembling speakers be sure to connect the speaker wires to the correct speaker lead (+) 9.1. Disassembly for CRT replacement 1. Discharge the CRT as instructed in the “safety precautions”. 2. Disconnect the yoke (DY) plug, degaussing coil (DEG) plug from the main board.

  • Page 73: Important Notice

    To remove and remount the degaussing coil: - Unhook the coil spring from the bottom corners of the CRT ears. - Release the braid loop from the upper corners of the CRT ears. 7. Mount the dag ground braid on the replacement CRT. Position the degaussing coil with new ties.
  • Page 74 Note: Components and test points within doted areas are located on trace side. B+ voltage check 1. Set the BRIGHT and PICTURE to minimum by using the PICTURE menu. 2. Connect the DVM between C825 (+ side) or TPD14 and cold ground.

  • Page 75: Purity And Convergence Procedure

    A-BOARD TEST VOLTAGE VOLTAGE 25 POINT 20” “ TPD14 131.0 ± 2.0V 131.0 ± 2.0V SOUND C823 (+) 18.4 ± 1.0V 18.4 ± 1.0V STB12V C827 (+) 12.7 ± 1.0 V 12.7 ± 1.0 V 220V TPA14 217 ± 10 V 221 ±...

  • Page 76: Vertical Raster Shift Adjustment

    For models using 4 pairs of rings, place the yoke on the CRT neck (do not tighten the clamp). Place the vertical raster shift tabs at 3 o’clock (90° from the purity and convergence tabs. Description of rings Initial position of rings Turn the receiver ON.

  • Page 77: Initial Center Static Convergence

    INITIAL CENTER STATIC CONVERGENCE Connect a dot/cross hatch generator to the receiver and tune in a signal. Observe misconvergence at center of the screen only. Adjust the R&B pole magnets; by separating tabs and rotating to converge blue with red. Adjust the R&B and R&B&G pole magnets: by separating tabs and rotating to converge blue and red (magenta) with green.

  • Page 78: Final Convergence Procedure

    procedure. FINAL CONVERGENCE PROCEDURE NOTE Vertical size and focus adjustments must be completed prior to performing the convergence adjustment. Connect a dot pattern generator to the receiver. The brightness level should not be higher than necessary to obtain a clear pattern. Converge the red and the blue dots at the center of the screen by rotating the R&B pole static convergence magnets.
  • Page 79 Convergence Magnets and Wedges Location 12. Service mode (electronic adjustments) This receiver has electronic technology using the IC 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 performedby using “on screen display menu”.
  • Page 80 7. Press POWER on the remote control to display the service adjustment modes menu, select adjustment by pressing the volume right/left buttons and channel up/down buttons on the remote and ACTION to enter the adjustment. Exiting the service mode: This TV goes out from service mode when it is unplugged or turned OFF. To exit the service mode, turn the TV OFF from or unplug the TV from A.C.
  • Page 81 Entering service mode (open-back method) While the receiver is connected and operating in normal mode, momentarily short test point FA1 (TP1 pin 2) to cold ground (TP1 pin 3). The receiver enters the aging mode. Yellow letters “CHK” appear in the upper left corner of the screen. / (The volume right/left and channel up/down will adjust rapidly).
  • Page 82 variation of electrical characteristics in each set, except for the ID switch values. *Note: The correspondent ID switch (ID1,ID2, ID3) data configuration should not be modified in any way. If EEPROM circuit needs to be replaced, these ID values should be configured according with this table.
  • Page 83 12.3. Instructional flow chart for service mode (continued).
  • Page 84 13. Service adjustments (electronic controls) NOTE Please correlate with available pattern on all adjustments 13.1. Sub-Brightness and Contrast / Service DAC adjustment (BRIGH, CONT) Adjustment of this control is important for setting proper operation of customer brightness and picture controls. Do not adjust the SCREEN VR after the sub-brightness is set. This adjustment is factory set.
  • Page 85 “BRIGH”, and adjust data to obtain 3.8±0.1V (for 20” CRT) or 3.4± 0.1V (for 25” CRT) between 7.5IRE and GND level at TP35. (See waveformdetail). 2. In service mode, select DAC for contrast adjustment “CONT”, and adjust data to obtain 2.2±0.1V (for 20” CRT) or 2.7±0.1V (for 25” CRT) between 7.5IRE and 100IRE level at TP35.
  • Page 86 1. Apply a rainbow color bar pattern. 2. Connect the oscilloscope to TP37. 3. In service mode adjust “TINT” register until the waveform measured is as the one shown. Tint level from A and B peaks must be almost in the same level (0.3 Vp for 20” models and 0.35 Vp for 25”...
  • Page 87 PROCEDURE 1. Apply a color bar pattern. 2. In service mode adjust “R DR” and “B DR” data to “80”. 3. In service mode adjust “TINT” data so that the color does not become greenish or redish. 4. In service mode adjust “COLOR” data so that the color level is not too high (saturated) or too low (tending to black and white).
  • Page 88 PATTERN. 2. Apply a color bar pattern (with no color). 3. Turn the SCREEN control (part of FBT T551) fully counterclockwise. 4. Preset the following service DACs for best results: - BRIGH______________________1 D0 - CUT R______________________02 00 - CUT G______________________02 00 - CUT B______________________02 00 - R DR_______________________07 FF - B DR_______________________07 FF...
  • Page 89 13.5. Deflection adjustments To reset deflection adjustments To reset deflection adjustments to factory adjusted default, enter to service mode (with red CHK displayed), press POWER button on remote to display the service menu, then press and hold RECALL button for at least three seconds, a reset messagewill appear in the image. Use this feature when deflection adjustment gets off adjustment to the point that it cannot be adjusted back easily.
  • Page 90 3. Verify that horizontal width (A & B mark) is within 4.5 ± 0.7 for 20” models and 5.0 ± 0.7 for 25” models. 13.5.2. Vertical linearity(V-C), V-Size and V-Position adjustment PREPARATION 1. Apply a crosshatch pattern 2. Normalize the picture settings. PROCEDURE 1.
  • Page 91 13.5.3. V-S Correction adjustment PREPARATION 1. Apply a crosshatch pattern 2. Normalize the picture settings. PROCEDURE 1. Enter to service mode 2. Check a and b sizes, If b-a < -1.5mm (in top & bottom extending case) - Increase “V-S” DATA by one step NOTE Repeat “a”...
  • Page 92 Input level adjustment / Service DAC adjustment (MTSIN) PREPARATION 1. Connect an RMS meter with filter jig as shown in figure to TPE11. Filter Jig 2. Connect an RF signal generator to the RF antenna input. PROCEDURE 1. Apply the following signal from the RF signal generator: - Video: 100 IRE flat field, 30% modulation.
  • Page 93 OPEN, P/S 10dB). NOTE After setting 30% modulation with P.L. SW and N.R. SW OFF, turn P.L. SW and N.R. SW 3. In service mode, adjust the MTS Low-Level separation adjustment “SEPAL” data until the amplitude displayed on the scope is minimum.

  • Page 94: Width Correction Adjustment

    of resolution following the decimal point. Example: 000.0000 4. Place the receiver into service mode for making electronic adjustment, select the clock adjustment DAC “CLOCK”. 5. Calculate and set “CLOCK” based on the following formula: NOTE TP017 (IC001 pin 79) measurement will not change regardless of the value stored in CLOCK. 13.8.
  • Page 95 Back Cover Removal (CT-25L8G/CT-25L8UG).
  • Page 96 14.2. Chassis Components Rear view (inside cabinet).
  • Page 97 14.2.1. C-Board Chassis C-Board component locations 14.2.2. CT-20G8G/CT-20G8SG A-Board Chassis A-Board Top view (CT-20G8G/CT-20G8SG).
  • Page 98 14.2.3. CT-20L8 A-Board Chassis A-Board Top view (CT-20L8G)
  • Page 99 14.2.4. CT-25L8/CT-25L8U A-Board Chassis A-Board Top view (CT-25L8G/CT-25L8UG).
  • Page 100 14.2.5. A-Board Surface-mounted components A-Board (bottom view)
  • Page 102 15. Reference for PDF Colors 16. Conductor Views 16.1. A-Board Printed Circuit (Left Side) 16.2. A-Board& C Board Printed Circuit (Right Side) 17. Block Diagrams 17.1. Video Signal Block Diagram 17.2. Audio Signal Block Diagram 18. Schematics 18.1. English Schematic Notes...
  • Page 104 18.2. Notas de Esquemáticos en Español...

  • Page 106: Parts List

    18.3. A-Board Schematic TNP2AH047AA/AB (page 1 of 4) 18.4. A-Board Schematic TNP2AH047AA/AB (page 2 of 4) 18.5. A-Board Schematic TNP2AH047AA/AB (page 3 of 4) 18.6. A-Board Schematic TNP2AH047AA/AB (page 4 of 4) 18.7. A-Board Schematic TNP2AH047FA (page 1 of 4) 18.8.
  • Page 107 20.2. Parts List...
  • Page 108 Ref. No. Part No. Part Name & Description Remarks CAPRISTORS CRA801 TP00842-51 TAPING GAP TERMINAL CAPACITORS C003 ECA1HM4R7B CAP E 4.7UF-50V C004 TCJ2VC1H150J CAP C 15PF-J-50V C005 TCJ2VC1H150J CAP C 15PF-J-50V C008 TCJ2VF1H103Z CAP C .01UF-Z-50V C009 ECJ2VF1H104Z CAP C .1UF-Z-50V C010 TCJ2VC1H680J CAP C 68PF-J-50V...
  • Page 109 Ref. No. Part No. Part Name & Description Remarks C039 TCJ2VB1H221K CAP C 220PF-K-50V C041 ECA1HM2R2B CAP E 2.2UF-50V C043 ECJ2VF1C105Z CAP C 1.0UF-Z-16V C044 ECA0JM102B CAP E 1000UF-6.3V C046 TCJ2VF1H103Z CAP C .01UF-Z-50V C048 ECJ2VF1C105Z CAP C 1.0UF-Z-16V C051 ECJ2VF1C105Z CAP C 1.0UF-Z-16V C052...
  • Page 110 Ref. No. Part No. Part Name & Description Remarks C501 ECCR1H221JC5 CAP C 220PF-J-50V C505 ECQB1H104JF3 CAP P .10UF-J-50V C506 ECKR2H102KB5 CAP C 1000PF-K-500V C510 ECCR2H100D5 CAP C 10PF-D-500V C512 ECA2CM100B CAP E 10UF-160V C531 ECA1HM4R7B CAP E 4.7UF-50V C540 TCJ2VF1H103Z CAP C .01UF-Z-50V C551...
  • Page 111 Ref. No. Part No. Part Name & Description Remarks C812 ECQU2A224MVA CAP P .22UF-M-250VAC C813 ECQU2A153MVA CAP P .015UF-M-250VAC C814 ECQU2A153MVA CAP P .015UF-M-250VAC C820 ECA1CM101B CAP E 100UF/16V C821 TCJ2VF1H103Z CAP C .01UF-Z-50V C822 ECKR3A221KBP CAP C 220PF-K-1KV C823 ECA1VM471B CAP E 470UF-35V C824...
  • Page 112 Ref. No. Part No. Part Name & Description Remarks C3240 TCJ2VF1H103Z CAP C .01UF-Z-50V DIODES D001 MAZ30680ML DIODE D002 MA2C165001VT DIODE D003 MAZ30510HL DIODE D006 MAZ33000HL DIODE D007 MAZ30510HL DIODE D010 MAZ40510MF DIODE ZENER D055 MAZ40330MF DIODE ZENER D360 MA2C165001VT DIODE D380 MA2C029WBF...
  • Page 113 D3019 CVS20A120MTA DIODE...
  • Page 114 Ref. No. Part No. Part Name & Description Remarks D3021 CVS20A120MTA DIODE D3023 MAZ31100ML DIODE ZENER D3024 MAZ31100ML DIODE ZENER FUSES F801 XBA2A00101 FUSE 6.3A 125V INTEGRATED CIRCUITS IC001 MN101E03GTB3 IC002 TVR2AJ165S EEPROM / CT-20G8G CT-20G8SG IC002 TVR2AJ166S EEPROM / CT-20L8G CT-25L8G CT-25L8UG IC003 GP1UE282GK IR SENSOR...
  • Page 115 L805 EXCELDR35V FERRITE BEAD / CT-20G8G CT-20G8SG CT-20L8G...
  • Page 116 Ref. No. Part No. Part Name & Description Remarks L806 EXCELDR35V FERRITE BEAD L807 EXCELSA35V FERRITE BEAD L808 EXCELSA35V FERRITE BEAD L809 EXCELDR35V FERRITE BEAD / CT-25L8G CT-25L8UG L810 EXCELDR35V FERRITE BEAD / CT-25L8G CT-25L8UG L2301 EXCELDR35V FERRITE BEAD / CT-20L8G CT-25L8G CT-25L8UG L2303 EXCELSA39T FERRITE BEAD / CT-25L8G CT-25L8UG...
  • Page 117 Ref. No. Part No. Part Name & Description Remarks R009 ERJ6GEYJ102V RES M 1K-J-1/10W R014 ERJ6GEYJ472V RES M 4.7K-J-1/10W R015 ERJ6GEYJ472V RES M 4.7K-J-1/10W R016 ERJ6GEYJ221V RES M 220-J-1/10W R017 ERJ6GEYJ221V RES M 220-J-1/10W R018 ERJ6GEYJ472V RES M 4.7K-J-1/10W R019 ERJ6GEYJ472V RES M 4.7K-J-1/10W R020...
  • Page 118 Ref. No. Part No. Part Name & Description Remarks R077 ERJ6GEYJ103V RES M 10K-J-1/10W R078 ERJ6GEYJ103V RES M 10K-J-1/10W R080 ERJ6GEYJ183V RES M 18K-J-1/10W R081 ERJ6GEYJ153 RES M 15K-J-1/10 R082 ERJ6GEYJ183V RES M 18K-J-1/10W R083 ERJ6GEYJ153V RES M 15K-J-1/10W R084 ERDS2TJ182T RES C 1.8K-J-1/4W R087...
  • Page 119 Ref. No. Part No. Part Name & Description Remarks R451 ERDS1FJ1R2P RES C 1.2-J-1/2W / CT-20G8G CT-20G8SG CT-20L8G R453 ERJ6GEYJ333V RES M 33K-J-1/10W R454 ERJ6GEYJ243V RES M 24K-J-1/10W / CT-20G8G CT-20G8SG CT-20L8G R454 ERJ6GEYJ363V RES M 36K-J-1/10W / CT-25L8G CT-25L8UG R455 ERJ6GEYJ103V RES M 10K-J-1/10W...
  • Page 120 Ref. No. Part No. Part Name & Description Remarks R801 ERF7ZK1R5 RES W 1.5-K-7 / CT-25L8G CT-25L8UG R802 ERG2FJ104H RES M 100K-J-2W R804 ERG1DJ224P RES M220K-J-1W R805 ERX2FZJR15H RES M .18-J-2W R806 ERX12SJ1R5P RES M 1.5-J-1/2W R807 ERDS2TJ681T RES C 680-J-1/4W R808 ERX12SJ1R5P RES M 1.5-J-1/2W...
  • Page 121 Ref. No. Part No. Part Name & Description Remarks R3010 ERJ6GEYJ334V RES M 330K-J-1/10W R3011 ERJ6GEYJ682V RES M 6.8K-J-1/10W R3012 ERDS2TJ101T RES C 100-J-1/4W R3013 ERJ6ENF75R0V RES M 75.0-F-1/10W R3014 ERJ6ENF75R0V RES M 75.0-F-1/10W R3015 ERJ6ENF75R0V RES M 75.0-F-1/10W R3016 ERDS2TJ181T RES C 180-J-1/4W R3017...
  • Page 122 TKX2AA00403 IR GUIDE / CT-25L8G CT-25L8UG TAS2AA0012 SPEAKER 16-OHM 1.5W TBM2A10141 BADGE PANASONIC / CT-20G8G TBM2A10143 BADGE PANASONIC / CT-20G8SG CT-20L8G CT-25L8G CT-25L8UG TBX2AA1303G BUTTON 7-KEY / CT-25L8G CT-25L8UG TBX2AA1701GS BUTTON 7-KEY / CT-20G8G TBX2AA1702G BUTTON 7-KEY / CT-20L8G TBX2AA1702GS...
  • Page 123 A-Board 4 Vp-p 4 Vp-p 4.32 V-p 1.3 Vp-p TPA5 (VIDEO) A11 PIN 3 (BLUE OUT) A11 PIN 1 (RED OUT) A11 PIN 2 (GREEN OUT) 10MHz X’tal 600mv Vp-p 3.28 Vp-p 3.88 Vp-p IC451 PIN 1 (VERT IN) IC001 PIN 36 (FBP IN) IC001 PIN 50 (OSC) Q4111 B (V DRIVE) 28 Vp-p...
  • Page 124 A-BOARD 1 of 4 TNP2AH047AA/AB CT-20L8G / CT-20G8G / CT-20G8SG...
  • Page 125 A-BOARD 2 of 4 TNP2AH047AA/AB CT-20L8 / CT-20G8 / CT-20G8S...
  • Page 126 CT-20L8G / CT-20G8G / CT-20G8SG A-BOARD 3 of 4 TNP2AH047AA/AB...
  • Page 127 CT-20L8G / CT-20G8G / CT-20G8SG A-BOARD 4 of 4 TNP2AH047AA/AB...
  • Page 128 A-BOARD 1 of 4 TNP2AH047FA CT-25L8G / CT-25L8UG...
  • Page 129 CT-25L8G / CT-25L8UG A-BOARD 2 of 4 TNP2AH047FA...
  • Page 130 CT-25L8G / CT-25L8UG A-BOARD 3 of 4 TNP2AH047FA...
  • Page 131 CT-25L8G / CT-25L8UG A-BOARD 4 of 4 TNP2AH047FA...

  • Page 132: Audio Signal Path Block Diagram

    Audio signal path block diagram A-BOARD L&R Mixed MPX IN IC2201 R-OUT L-OUT JK3001 REAR AUDIO R-IN L-IN IC2301 JK3002 AUDIO AMP FRONT AUDIO R-OUT L-OUT MUTE ON/OFF IC001 CT-20L8G / CT-20G8G / CT-20G8SG / CT-25L8G / CT-25L8UG...
  • Page 133 C-BOARD TNP2AA122FA/AA CT-20L8G / CT-20G8G / CT-20G8SG / CT-25L8G / CT-25L8UG...
  • Page 134 A-BOARD 1 of 2 TNP2AH047 CT-20L8G / CT-20G8G / CT-20G8SG / CT-25L8G / CT-25L8UG...
  • Page 135 A-BOARD 2 of 2 TNP2AH047 C-BOARD TNP2AA122 CT-20L8G / CT-20G8G / CT-20G8SG / CT-25L8G / CT-25L8UG...

  • Page 136: Video Signal Path Block Diagram

    Video signal path block diagram IC3001 VIDEO SWITCH V2/Y2 TV IN V1/Y1 V/Y OUT JK3001 REAR VIDEO Y/V1 MCOMP IN MV IN MU IN IC001 JK3002 FRONT VIDEO R OUT G OUT B OUT MSCIN *JK3003 S-Video Q360 Q361 Q362 Q357 Q358 Q359...
  • Page 137 A - BOARD IC001 IC002 IC501 IC2201 ..0.00 ..2.50 ..0.00 ..0.00 ..1.60 ..2.80 .
  • Page 138 A - BOARD Q001 Q057 Q058 Q070 Q092 Q2350 Q3001 Q3002 Q354 0.00 1.50 1.50 4.12 8.90 5.35 1.30 1.30 4.50 13.00 0.00 0.00 8.90 1.40 0.00 3.30 3.30 8.50 0.00 0.07 0.07 3.50 3.30 3.14 0.70 0.70 3.80 Q355 Q356 Q357 Q358...

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