Page 1 This simplified service manual is issued to add listed models to the simplified service manual order No. MTNC030834A1 (CT-20SL13G). CT-20SL14J and CT-20SL14TJ are identical to CT-20SL13G except for the differences included on this simplified servicemanual. A complete parts list and schematics are included in this simplified service manual.
Page 2 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 Leakage current cold check Unplug the A.C. cord and connect a jumper between the two plug prongs.Measure the resistance between the jumpered AC plug and expose metallic parts such as screwheads, antenna terminals, control shafts, etc. If the exposed metallic part has a returnpath to the chassis, the reading should be between 240k and 5.2M .
Page 4 Set the brightness, picture, sharpness and color controls to minimum. Measure the high voltage. The high voltage should be 29.25 ± 1.25kV for CT-20SL14J and 28.70 ± 1.25kV for CT-20SL14TJ. If the upper limit is out of tolerance, immediate service and correctionis required to insure safe operation and to prevent the possibility of premature component failure.
Page 5 Chip component installation 1. Put a small amount of solder on the board soldering pads. 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.
Page 6 3. Remove the solder from all the pads of the Flat IC by using a de solder braid 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 IMPORTANT To protect against possible damage to the solid state devices due to arching or static discharge, make certain that all ground wires and CRT DAG wire are securely connected. CAUTION The power supply circuit is above earth ground and the chassis cannot be polarized.
Page 8 4. Prepare short jumper and HHS jig. Procedure: 1. Connect the short jumper between TPD16 & TPD17. 2. Connect the jumper diode between TPD14 and TPD15 (anode connected to TPD15 and cathode to TPD14). 3. Apply 75VAC to AC input of isolation transformer. 4.
Page 9 4. With “VOL” keys adjust the correct value according with the service adjustment table (see “Service Mode” section). 5. Change to the next ID switch register with “CH” keys and repeat the same procedure as step 4. 6. When replacing a new EEPROM be sure to set the correct ID switch values for each model.
Page 10 CAUTION - Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30 ~ 40 °C) higher. Please use a high temperature soldering iron and set it to 700 ± 20 °F (370 ±...
Page 11 5. Receiver feature table FEATURE/MODEL CT-20SL14J CT-20SL14TJ CHASSIS AP432 DP414 MICRO 128K MENU LANGUAGE ENG/SPAN/FR CLOSED CAPTION V-CHIP (USA/CANADA) CHANNEL COUNT CHANNEL INFO BANNER VIDEO INPUT SKIP SKIP 75 OHM INPUT REMOTE CONTROL EUR7613ZB0 EUR7613Z6A CRT SUPPLIER SAMSUNG SEMI TINT...
Page 12 BOARD PART NUMBER DESCRIPTION TNP2AH060CG MAIN BOARD TNP2AA167CC CRT BOARD NOTE When ordering a replacement board assembly, append an “S” to the board number EXAMPLE To order the A Board for CT-20SL14J, order as TNP2AH060CDS. 7. TV Location of controls...
Page 13 8. Location of controls (remote) 8.1. EUR7613ZB0...
Page 14 Note: For additional information about this remote please refer to the owner’s manual section remote operation, listed on the parts list section. 8.2. EUR7613Z6A...
Page 15 Note: For additional information about this remote please refer to the owner’s manual section remote operation, listed on the parts list section. 9. Chassis service adjustment procedures All service adjustments are factory preset and should not require adjustment unless controls and/ or associated components are replaced.
Page 16 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 17 A-BOARD TEST POINT VOLTAGE TPD14 131.0 ± 2.0V SOUND C823 (+) 22.7 ± 1.0V STB12V C827 (+) 12.8 ± 1.0 V 220V TPA14 200 ± 10 V VERTICAL TPD8 27.4 ± 1.5V IC551 pin 3 9.0 ± 0.5V IC552 pin 3 5.0 ±...
Page 18 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. Red “CHK” for serviceand yellow “CHK”...
Page 19 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 20 IMPORTANT: These table values are approximated and could change due to 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 21 TP35 (TP47G). (See waveform detail). 11.2. Color output adjustment / Service DAC adjustment (COLOR, TINT) NOTE if a rainbow pattern generator is available perform the following procedure; the next section describes the procedure with no rainbow pattern. Make sure that sub-contrast adjustment was finished prior to perform this adjustment. PREPARATION 1.
Page 22 4. Connect the oscilloscope to TP35 and GND. 5. Adjust “COLOR” register so that the amplitude is 0.8 ± 0.05Vp-p (see figure below). TP35 Waveform (TP47G). 11.3. Color output adjustment / Service DAC adjustment / (COLOR, TINT, B-Y_G) NOTE Color and tint adjustment sets the reference settings for the user controls; It is important to read the procedures.
Page 23 too high (saturated) or too low (tending to black and white). 5. In service mode adjust “B-Y G” data so that blue and green seem natural. 6. Confirm that saturation and picture are normal (normal image). 7. If image is not satisfactory, repeat adjustment until the image is normal and natural.
Page 24 - CUT G______________________02 00 - CUT B______________________02 00 - R DR_______________________07 FF - B DR_______________________07 FF PROCEDURE 1. Connect the oscilloscope to KG (CRT-Board). 2. In service mode for making electronic adjustment, select “BRIGH” DAC. 3. Press RECALL button on the remote control to collapse the raster. (service SW).
Page 25 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. Use this feature when deflection adjustment gets off adjustment to the point that it cannot be adjusted back easily.
Page 26 2. Apply a crosshatch pattern. 3. Adjust “PCC” data to make lines straight. 4. Adjust “H-WID” data to correct vertical size of the image. 5. Adjust “VEAMP” data to correct vertical size of the image. 11.5.3. Vertical linearity(V-C), V-Size and V-Position adjustment PREPARATION 1.
Page 27 11.5.4. 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 28 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. 11.5.6. PCC adjustment (PCC) This adjustment helps to correct left and right curved sides of picture.
Page 29 Procedure: 1. Adjust “TOPG” and “TOPSL” data to correct upper side of the image linearity. 2. Adjust “BTMG” and “BTMSL” data to correct lower side of the image (see figure below). Top and bottom adjustment 11.6. MTS circuit adjustments The MTS circuit adjustments require two steps: 1.
Page 30 OPEN, P/S 10dB). Make sure that the 75 s pre-emphasis is OFF. 2. Adjust the MTS input level adjustment “MTSIN” data until the RMS voltage measured is 120 ± 4.0mVrms. Stereo separation adjustment (SEPAH) PREPARATION 1. Connect an R.F. signal generator to the RF antenna input. 2.
Page 31 5. Adjust the MTS High-level separation adjustment “SEPAH” until the amplitude displayed on the scope is minimum. 6. Repeat above steps 2 through 5 until the amplitude is at minimum for both signals. 11.7. Clock adjustment (CLOCK) PREPARATION Connect the frequency counter from TP017 / (IC001 pin 79) to cold ground PROCEDURE 1.
Page 32 Perform this adjustment only when FBT is changed. FOCUS (PART OF T551) Preparation Apply a crosshatch pattern with dots. Procedure 1. Adjust the FOCUS VR to obtain the sharpest and clearest dot pattern. - Adjust for best center. - Adjust for best area between the center and top right corner. 12.
Page 33 12.2. A-Board Chassis 12.3. C-Board Chassis 12.4. A-Board surface-mounted components A-Board (bottom side)
Page 35 13. Reference for PDF colors 14. Conductor views 14.1. A-Board printed circuit (left side) 14.2. A-Board & C-Board printed circuit (right side) 15. Block diagrams 15.1. Video signal block diagram 15.2. Audio signal block diagram 16. Schematics 16.1. English schematic notes...
Page 37 16.2. Notas de esquem á ticos en espa ñ ol...
Page 39 16.3. A-Board schematic TNP2AH060CD (page 1 of 5) 16.4. A-Board schematic TNP2AH060CD (page 2 of 5) 16.5. A-Board schematic TNP2AH060CD (page 3 of 5) 16.6. A-Board schematic TNP2AH060CD (page 4 of 5) 16.7. A-Board schematic TNP2AH060CD (page 5 of 5) 16.8.
Page 40 CAP C 150PF-J-50V C551 ECA1VM471B CAP E 470UF-35V C556 ECA1CM222B CAP E 470UF-16V C563 ECWH20752JVB CT-20SL14TJ C563 ECWH20682JVB CAP C .0075UF-J-200V CT-20SL14J C565 ECKW3D681JBR CT-20SL14TJ C565 ECKW3D821JBR CAP C 680PF-J-2KV CT-20SL14J C569 ECWF2304JSR CT-20SL14TJ C569 ECWF2274JSR CAP C .3UF-J-250V CT-20SL14J...
Page 41 TLY2AA042 DEFLECTION YOKE CT-20SL14J M005 TLY2AA028 DEFLECTION YOKE CT-20SL14TJ ACCESORIES M006 TQB2AA0499 MANUAL OWNERS M007 EUR7613ZB0 TRANSMITER REMOTE CTRL CT-20SL14J M008 UR76EC0303E BATTERY COVER REMOTE CTRL EUR7613ZB0 M009 EUR7613Z6A TRANSMITER REMOTE CTRL CT-20SL14TJ M010 UR76EC0303D BATTERY COVER REMOTE CTRL EUR7613Z6A...
Page 42 A-BOARD TNP2AH060CD CT-20SL14J...
Page 43 A-BOARD TNP2AH060CD CT-20SL14J...
Page 44 A-BOARD TNP2AH060CD CT-20SL14J...
Page 45 A-BOARD TNP2AH060CG CT-20SL14TJ...
Page 46 A-BOARD TNP2AH060CG CT-20SL14TJ...
Page 47 A-BOARD TNP2AH060CG CT-20SL14TJ...
Page 48 A-BOARD TNP2AH060CG CT-20SL14TJ...
Page 49 A-BOARD TNP2AH060CG CT-20SL14TJ...
Page 50 A-BOARD TNP2AH060 CT-20SL14J, CT-20SL14TJ...
Page 51 A-BOARD & C-BOARD TNP2AH060 CT-20SL14J, CT-20SL14TJ...
Page 52 A-BOARD Audio Switching IC3101 L&R Mixed MPX IN IC2201 JK3001 R-OUT L-OUT REAR AUDIO R-IN L-IN IC2501 R-OUT L-OUT JK3002 R-IN L-IN FRONT VAO-R AUDIO IC2301 AUDIO AMP VAO-L R-OUT L-OUT MUTE JK3004 TO AUDIO SP ON/OFF IC001 CT-20SL14J, CT020SL14TJ...
Page 53 C-BOARD TNP2AA167CB CT-20SL14J...
Page 54 C-BOARD TNP2AA167CC CT-20SL14TJ...
Page 55 V/Y OUT V1/Y1 JK3001 REAR VIDEO Y/V1 MCOMP IN MV IN MU IN IC001 JK3002 FRONT VIDEO R OUT G OUT B OUT MSCIN JK3003 Q360 Q361 Q362 S-VIDEO Q357 Q358 Q359 Q354 Q355 Q356 Q351 Q352 Q353 C-BOARD CT-20SL14J, CT-20SL14TJ...
Page 56 ..1.70 ..3.30 ..0.00 ..0.40 ..0.00 ..0.40 ..3.30 CT-20SL14J, CT-SL14TJ...
Page 57 *Q757 *Q901 *Q902 7.50 0.00 1.00 5.20 8.90 7.60 5.20 2.40 0.00 0.00 0.40 5.80 *For models (CT-24SL13 and CT-24SL13UG) only. C - BOARD - TNP2AA167CB/CC Q351 Q352 Q353 1.90 1.50 6.30 8.90 5.70 8.90 1.50 1.50 5.70 CT-20SL14J, CT-SL14TJ...
Page 58 3.20 Vp-p IC451 PIN 5(V OUT) IC451 PIN 3 (PUMP UP) IC501 PIN 4 (H-DRIVE) A12 PIN 2 (HEATER) 1.24 kVp-p 392 Vp-p 2.88 Vp-p 114 Vp-p Q551 Collector (H OUT) IC801 PIN 1 IC801 PIN 7 Q501 Collector CT-20SL14J, CT-20SL14TJ...
Page 59 A-BOARD TNP2AH060CD CT-20SL14J...
Page 60 A-BOARD TNP2AH060CD CT-20SL14J...
Page 61 MTNC030834A1 B01/B05 Color Television CT-20SL13G / CT-24SL13G / CT-24SL13UG 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 62 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 63 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 64 required to insure safe operation and to prevent the possibility of premature component 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.
Page 65 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 66 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 67 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 68 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 AC voltage at the input of the isolation transformer and confirm HHS voltage measure 34.5kV.
Page 69 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 70 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 71 FEATURE/MODEL CT-20SL13G CT-24SL13G CHASSIS AP414 BP401 MICRO 128K MENU LANGUAGE ENG/SPAN/FR CLOSED CAPTION V-CHIP (USA/CANADA) CHANNEL COUNT CHANNEL INFO BANNER VIDEO INPUT SKIP SKIP 75 OHM INPUT REMOTE CONTROL EUR7613Z60 CRT SUPPLIER SAMSUNG MDDM (FLAT) FAMILY NA10 COMB FILTER 3 DIG HEC/VEC (X=BOTH) V/A NORM (X=BOTH) COLOR TEMP...
Page 72 BOARD PART NUMBER DESCRIPTION TNP2AH047CD MAIN BOARD TNP2AA122CB CRT BOARD CT-24SL13G / CT-24SL13UG BOARD PART NUMBER DESCRIPTION TNP2AH047DB MAIN BOARD TNP2AA157AH CRT BOARD TNP2AA152 PINCUSHION GAIN BOARD NOTE When ordering a replacement board assembly, append an “S” to the board number EXAMPLE To order the A Board, for CT-24SL13G the replacement board is TNP2AH047DBS.
Page 73 8. Location of controls (remote) 8.1. EUR7613Z60...
Page 74 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 75 Q-Board - Pincushion Gain Carefully disconnect Q1 connector and remove the board from the 3 fasteners pressing from the sides on each one. Speakers Each speaker is secured to the cabinet with 4 screws. NOTE When reassembling speakers be sure to connect the speaker wires to the correct speaker lead (+) 9.1.
Page 76 3. Remove the components from the CRT neck and place the cabinet face down on a soft pad. 4. Note the original order for the CRT mounting hardware as they are remove from the CRT mounting brackets at each corner of the CRT.
Page 77 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. Otherwise, use COLD ground (tuner shield, IC451’s heat sink or FA2).
Page 78 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 79 A-BOARD TEST VOLTAGE POINT SAMSUNG MDDM CRT TPD14 131.0 ± 2.0V 131.0 ± 2.0V SOUND C823 (+) 22.7 ± 1.0V 22.7 ± 1.0V STB12V C827 (+) 12.7 ± 1.0 V 12.8 ± 1.0 V 220V TPA14 210 ± 10 V 205 ±...
Page 80 YH Adjustment / (VR2 for vertical dynamic convergence) 1. Apply a crosshatch pattern. 2. Adjust contrast and brightness customer controls to obtain a correct picture. 3. With a driver Adjust VR2 (located in deflection yoke board to obtain a proper convergence at left and right side of the screen. VR2 Adjustment (Y XV Adjustment / (precise adjustment) 1.
Page 81 12. Service mode (electronic adjustments) This receiver has electronic technology using the I C 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 nowperformed by using “on screen display menu”.
Page 82 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 83 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). Note: If service mode is accessed by this method be sure to reset the set after service is performed.
Page 84 NAME DESCRIPTION REGISTER VALUE CT-20SL13G CT-24SL13G ID3* ID SWITCH 3 IMPORTANT: These table values are approximated and could change due to 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.
Page 85 2. In service mode, select DAC for contrast adjustment “CONT”, and adjust data to obtain 2.2±0.1V (for 20” CRT) or 2.9±0.1V (for 24” CRT) between 7.5IRE and 100IRE level at TP35 (TP47G). (See waveformdetail). 13.2. Color output adjustment / Service DAC adjustment (COLOR, TINT) NOTE if a rainbow pattern generator is available perform the following procedure;...
Page 86 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 (0.35 Vp). TP37 Waveform (TP47B). 4. Connect the oscilloscope to TP35 and GND. 5.
Page 87 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 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 PROCEDURE 1. Connect the oscilloscope to KG (CRT-Board). 2.
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 message will 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. 13.5.2. Horizontal width adjustment / (H-WID) PREPARATION Apply a pattern that permits the centering of the image. Procedure: 1. Adjust “VRAS” data so that the picture is in the center and lines are straight (check mark on CRT sides).
Page 91 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. Vertical centering adjustment.
Page 92 13.5.5. 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. 13.5.6.
Page 93 13.5.7. Corner PCC adjustment / (TOPG, TOPSL, BTMG, BTMSL) This controls help to adjust top and bottom sides of picture. PREPARATION 1. Apply a crosshatch pattern. 2. Normalize the picture icon video adjustments. Procedure: 1. Adjust “TOPG” and “TOPSL” data to correct upper side of the image linearity.
Page 94 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). Make sure that the 75 s pre-emphasis is OFF.
Page 95 “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 96 NOTE TP017 (IC001 pin 79) measurement will not change regardless of the value stored in CLOCK. 13.8. Service Adjustments Mechanical Controls WIDTH CORRECTION ADJUSTMENT Note Perform this adjustment only when FBT is changed. FOCUS (PART OF T551) Preparation Apply a crosshatch pattern with dots. Procedure 1.
Page 97 14.2. A-Board Chassis 14.3. C-Board Chassis...
Page 98 14.4. C-Board Chassis (24” models) C-Board main components 14.5. Q-Board Chassis (24” models)
Page 99 14.6. A-Board surface-mounted components A-Board (bottom side)
Page 101 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) 16.3. C-Board printed Circuit (24” models) 16.4. Q-Board printed circuit (24” models) 17. Block diagrams 17.1. Video signal block diagram 17.2.
Page 102 18.1. English schematic notes...
Page 104 18.2. Notas de esquemáticos en español...
Page 106 18.3. A-Board schematic TNP2AH047CD (page 1 of 4) 18.4. A-Board schematic TNP2AH047CD (page 2 of 4) 18.5. A-Board schematic TNP2AH047CD (page 3 of 4) 18.6. A-Board schematic TNP2AH047CD (page 4 of 4) 18.7. A-Board schematic TNP2AH047DB (page 1 of 4) 18.8.
Page 107 20.2. Parts list 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 ECJ2VB1C104K CAP C .1UF-K-16V C010...
Page 108 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 109 Ref. No. Part No. Part Name & Description Remarks C451 ECA1HM2R2B CAP E 2.2UF-50V C452 ECA1CM220B CAP E 22UF-16V C454 ECA1VHG101B CAP E 100UF-35V C455 ECA1EM102E CAP E 1000UF-25V C458 ECA1HM010B CAP E 1UF-50V C459 ECA1VHG471E CAP E 470UF-35V C460 ECQB1224KF3 CAP P .22UF-K-100V C461...
Page 110 Ref. No. Part No. Part Name & Description Remarks C801 ECKWAE472ZED CAP C 4700PF-Z-500V C802 ECKWAE472ZED CAP C 4700PF-Z-500V C803 ECKWAE472ZED CAP C 4700PF-Z-500V C805 EC0S2DA221BB CAP E 220UF/200V / CT-20SL13G C805 EC0S2DA471BB CAP E 470UF/160V / CT-24SL13G CT-24SL13UG C806 ECQM4103KZW CAP P .01UF-K-400V C808...
Page 111 Ref. No. Part No. Part Name & Description Remarks C2213 ECA1HMR47B CAP E .47UF-50V C2214 ECA1AM101B CAP E 100UF-10V C2215 EEANA1E100B CAP E 10UF-25V C2216 TCJ2VC1H100D CAP C 10PF-J-50V C2217 ECJ2VB1H102K CAP C .001UF-K-50V C2217 TCJ2VB1H102K CAP C 1000PF-K-50V C2218 ECJ2VB1H102K CAP C .001UF-K-50V C2218...
Page 112 Ref. No. Part No. Part Name & Description Remarks C3019 ECJ2VF1C105Z CAP C 1.0UF-Z-16V C3020 ECA1HM010B CAP E 1UF-50V C3025 ECA1HM100B CAP E 10UF/50V C3121 ECA1CM470B CAP E 47UF/16V C3122 TCJ2VF1H103Z CAP C .01UF-Z-50V C3234 ECA1CM470B CAP E 47UF/16V C3240 TCJ2VF1H103Z CAP C .01UF-Z-50V C4322...
Page 113 D2307 CVS20A120MTA DIODE...
Page 114 Ref. No. Part No. Part Name & Description Remarks D2350 MAZ40910LF DIODE ZENER D2353 MA2C165001VT DIODE D2355 MAZ30510HL DIODE D2360 CVS20A120MTA DIODE D2361 CVS20A120MTA DIODE D2501 MAZ31100ML DIODE ZENER D3001 MAZ40510MF DIODE ZENER D3004 CVS20A120MTA DIODE D3005 CVS20A120MTA DIODE D3007 MAZ31100ML DIODE ZENER D3008...
Page 115 Ref. No. Part No. Part Name & Description Remarks L013 EXCELSA26T FERRITE BEAD L014 ELESN180KA COIL PEAKING 18UH L015 ELESN3R3JA COIL PEAKING 3.3UH L020 EXCELSA26T FERRITE BEAD L032 EXCELSA26T FERRITE BEAD L108 EXCELSA35V FERRITE BEAD L110 G0C101KA0021 COIL PEAKING 100UH L148 EXCELSA35T FERRITE BEAD...
Page 116 Ref. No. Part No. Part Name & Description Remarks Q360 2PB709AR-115 TRANSISTOR Q361 2PB709AR-115 TRANSISTOR Q362 2PB709AR-115 TRANSISTOR Q411 2SB0710AQL TRANSISTOR Q412 2SD0602AQL TRANSISTOR Q451 2PB709AR-115 TRANSISTOR Q451 2SB709ARTX TRANSISTOR / CT-20SL13G Q501 2SC1573AH TRANSISTOR / CT-20SL13G Q501 2SC4212HLB TRANSISTOR / CT-24SL13G CT-24SL13UG Q551 2SC562200VLK TRANSISTOR / CT-20SL13G...
Page 117 Ref. No. Part No. Part Name & Description Remarks 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 ERJ6GEYJ221V RES M 220-J-1/10W R021 ERJ6GEYJ101V RES M 100-J-1/10W R022 ERJ6GEYJ101V RES M 100-J-1/10W R023 ERJ6GEYJ102V RES M 1K-J-1/10W R024...
Page 118 Ref. No. Part No. Part Name & Description Remarks R081 ERJ6GEYJ153V RES M 15K-J-1/10W 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 ERDS2TJ221T RES C 220-J-1/4W R088 ERJ6GEYJ223V RES M 22K-J-1/10W R092 ERJ6GEYJ473V RES M 47K-J-1/10W R093...
Page 119 Ref. No. Part No. Part Name & Description Remarks R381 ERJ6ENF1501V RES M 1.5K-F-1/10W R382 ERJ6ENF1501V RES M 1.5K-F-1/10W R383 ERJ6ENF3481V RES M 3.48K-F-1/10W R384 ERJ6ENF7500V RES M 750-F-1/10W R385 ERDS1FJ150P RES C 15-J-1/2W R389 ERJ6GEYJ102V RES M 1K-J-1/10W R390 ERJ6GEYJ102V RES M 1K-J-1/10W R391...
Page 120 Ref. No. Part No. Part Name & Description Remarks R557 ERJ6GEYJ103V RES M 10K-J-1/10W R559 ERG2FJ683H RES M 12K-J-2W R561 ERG2FJ102H RES M 1K-J-2W R562 ERG2FJ270H RES M 27-J-2W R563 ERG3FJ150H RES M 15-J-3W R564 ERDS2TJ563T RES C 56K-J-1/4W / CT-24SL13G CT-24SL13UG R564 ERDS2TJ823T RES C 82K-J-1/4W / CT-20SL13G...
Page 121 Ref. No. Part No. Part Name & Description Remarks R908 ERJ6GEYJ683V RES M 68K-J-1/10W / CT-24SL13G CT-24SL13UG R909 ERJ6GEYJ103V RES M 10K-J-1/10W / CT-24SL13G CT-24SL13UG R951 ERDS2TJ821T RES C 820-J-1/4W / CT-24SL13G CT-24SL13UG R952 ERDS2TJ153T RES C 15K-J-1/4W / CT-24SL13G CT-24SL13UG R953 ERDS2TJ332T RES C 3.3K-J-1/4W / CT-24SL13G CT-24SL13UG...
Page 122 Ref. No. Part No. Part Name & Description Remarks R2370 ERJ6GEYJ222V RES M 2.2K-J-1/10W R2417 ERJ6GEYJ103V RES M 10K-J-1/10W R2504 ERDS2TJ101T RES C 100-J-1/4W R2505 ERDS2TJ101T RES C 100-J-1/4W R3001 ERDS2TJ101T RES C 100-J-1/4W R3002 ERJ6GEYJ221V RES M 220-J-1/10W R3003 ERJ6GEYJ221V RES M 220-J-1/10W R3004...
Page 123 Ref. No. Part No. Part Name & Description Remarks S008 EVQPF106K SWITCH S009 EVQPF106K SWITCH TRANSFORMERS T501 ETH19Y211AZ TRANSFORMER / CT-24SL13G CT-24SL13UG T501 ETH19Y22AY TRANSFORMER HORIZONTAL DRIVE / CT-20SL13G T551 KFT3AA341F FLYBACK TRANSFORMER / CT-20SL13G T551 TLF2AA005 FLYBACK TRANSFORMER / CT-24SL13G CT-24SL13UG T801 ETS29AS1N5NC TRANSFORMER / CT-20SL13G...
Page 124 Ref. No. Part No. Part Name & Description Remarks M008 TQB2AA0454 OWNER’S MANUAL...
Page 125 A-BOARD 3 of 4 TNP2AH047DB CT-24SL13G / CT-24SL13UG...
Page 126 A-BOARD 4 of 4 TNP2AH047DB CT-24SL13G / CT-24SL13UG...
Page 127 Audio signal path block diagram A-BOARD Audio Switching IC3101 L&R Mixed MPX IN IC2201 JK3001 R-OUT L-OUT REAR AUDIO R-IN L-IN IC2501 R-OUT L-OUT JK3002 R-IN L-IN FRONT VAO-R AUDIO IC2301 AUDIO AMP VAO-L R-OUT L-OUT MUTE JK3004 TO AUDIO SP ON/OFF IC001 CT-20SL13G/CT-24SL13G &...
Page 128 C-BOARD 1 of 2 TNP2AA157AH CT-24SL13G / CT-24SL13G...
Page 129 22 of 2 C-BOARD TNP2AA157AH CT-24SL13G / CT-24SL13G...
Page 130 C-BOARD TNP2AA122CB CT-20SL13G...
Page 131 CT-20SL13G / CT-24SL13G / CT-24SL13UG A-BOARD 1 of 2 TNP2AH047...
Page 132 A-BOARD 2 of 2 TNP2AH047 C-BOARD TNP2AA122 CT-20SL13G / CT-24SL13G / CT-24SL13UG...
Page 133 C-BOARD TNP2AA157 CT-24SL13G / CT-24SL13UG...
Page 134 Q-BOARD TNP2AA152 CT-24SL13G / CT-24SL13UG...
Page 135 Q-BOARD TNP2AA122 CT-24SL13G / CT-24SL13UG...
Page 136 Video signal path block diagram A-BOARD IC3002 FRONT VIDEO SW V2/Y2 IC3001 VIDEO SWITCH TV IN V/Y OUT V1/Y1 JK3001 REAR VIDEO Y/V1 MCOMP IN MV IN MU IN IC001 JK3002 FRONT VIDEO R OUT G OUT B OUT VM OUT MSCIN JK3003 Q360...
Page 137 A - BOARD - TNP2AH047 IC2201 IC2301 IC001 IC002 IC501 ..1.60 ..2.80 ..7.50 ..0.00 ..2.50 ..0.00 .
Page 138 A - BOARD - TNP2AH047 Q001 Q057 Q058 Q070 Q092 Q2350 Q2361 Q2362 Q2363 0.00 1.50 1.50 4.12 8.90 5.35 0.30 0.00 1.34 13.00 0.00 0.00 8.90 1.40 0.00 0.00 0.10 0.00 0.00 0.07 0.07 3.50 3.30 3.14 0.00 0.00 1.50 Q3001 Q3002...
Page 139 A-Board 4.6 Vp-p 4.6 Vp-p 4.6 V-p 1.3 Vp-p A11 PIN 5 (BLUE OUT) A11 PIN 3 (RED OUT) A11 PIN 4 (GREEN OUT) TPA5 (VIDEO) 10MHz X’tal 800mv Vp-p 3.40 Vp-p 3.88 Vp-p IC451 PIN 1 (VERT IN) IC001 PIN 36 (FBP IN) IC001 PIN 50 (OSC) Q4111 B (V DRIVE) 31.4 Vp-p...
Page 140 TNP2AH047CD A A-BOARD 1 of 4 TNP2AH047CD CT-20SL13G...
Page 141 A-BOARD 2 of 4 TNP2AH047CD CT-20SL13G...
Page 142 A-BOARD 3 of 4 TNP2AH047CD CT-20SL13G...
Page 143 A-BOARD 4 of 4 TNP2AH047CD CT-20SL13G...
Page 144 A-BOARD 1 of 4 TNP2AH047DB CT-24SL13G / CT-24SL13UG...
Page 145 A-BOARD 2 of 4 TNP2AH047DB CT-24SL13G / CT-24SL13UG...
Page 146 MTNC030623C1 B01/B05 Color Television CT-25L8G / CT-25L8UG / CT-20L8G / CT-20G8G / CT-20G8SG NA10 Copyright 2003 Matsushita Electric Corporation of America. All rights reserved. Unauthorized copying and distribution is a violation of law. 1. Safety precautions General guidelines...
Page 147 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 148 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 149 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 150 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 151 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 152 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 153 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 154 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 155 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 156 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 157 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 158 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 159 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 160 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 161 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 162 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 163 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 164 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 165 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 166 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 167 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 168 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 169 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 170 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 171 12.3. Instructional flow chart for service mode (continued).
Page 172 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 173 “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 174 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 175 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 176 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 177 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 178 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 179 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 180 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 181 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 182 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 183 Back Cover Removal (CT-25L8G/CT-25L8UG).
Page 184 14.2. Chassis Components Rear view (inside cabinet).
Page 185 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 186 14.2.3. CT-20L8 A-Board Chassis A-Board Top view (CT-20L8G)
Page 187 14.2.4. CT-25L8/CT-25L8U A-Board Chassis A-Board Top view (CT-25L8G/CT-25L8UG).
Page 188 14.2.5. A-Board Surface-mounted components A-Board (bottom view)
Page 190 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 192 18.2. Notas de Esquemáticos en Español...
Page 194 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 195 20.2. Parts List...
Page 196 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 197 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 198 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 199 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 200 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 201 D3019 CVS20A120MTA DIODE...
Page 202 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 203 L805 EXCELDR35V FERRITE BEAD / CT-20G8G CT-20G8SG CT-20L8G...
Page 204 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 205 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 206 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 207 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 208 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 209 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 210 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 211 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 212 A-BOARD 1 of 4 TNP2AH047AA/AB CT-20L8G / CT-20G8G / CT-20G8SG...
Page 213 A-BOARD 2 of 4 TNP2AH047AA/AB CT-20L8 / CT-20G8 / CT-20G8S...
Page 214 CT-20L8G / CT-20G8G / CT-20G8SG A-BOARD 3 of 4 TNP2AH047AA/AB...
Page 215 CT-20L8G / CT-20G8G / CT-20G8SG A-BOARD 4 of 4 TNP2AH047AA/AB...
Page 216 A-BOARD 1 of 4 TNP2AH047FA CT-25L8G / CT-25L8UG...
Page 217 CT-25L8G / CT-25L8UG A-BOARD 2 of 4 TNP2AH047FA...
Page 218 CT-25L8G / CT-25L8UG A-BOARD 3 of 4 TNP2AH047FA...
Page 219 CT-25L8G / CT-25L8UG A-BOARD 4 of 4 TNP2AH047FA...
Page 220 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 221 C-BOARD TNP2AA122FA/AA CT-20L8G / CT-20G8G / CT-20G8SG / CT-25L8G / CT-25L8UG...
Page 222 A-BOARD 1 of 2 TNP2AH047 CT-20L8G / CT-20G8G / CT-20G8SG / CT-25L8G / CT-25L8UG...
Page 223 A-BOARD 2 of 2 TNP2AH047 C-BOARD TNP2AA122 CT-20L8G / CT-20G8G / CT-20G8SG / CT-25L8G / CT-25L8UG...
Page 224 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 225 A - BOARD IC001 IC002 IC501 IC2201 ..0.00 ..2.50 ..0.00 ..0.00 ..1.60 ..2.80 .
Page 226 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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