Panasonic CT-20SL15 Service Manual
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Panasonic CT-20SL15 Service Manual

Panasonic CT-20SL15 Service Manual

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Service Manual
This service manual is issued as a service guide for the model listed above.
Included in this manual are a set of schematic, block diagrams, functional descriptions, alignment procedures,
disassembly procedures and a complete parts list.
"WARNING! This Service Manual is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death."
The service technician is required to read and follow the "Safety Precautions" and "Important Safety Notice" in this Main Manual.
Color Television
Main Manual
Panasonic
Models
CT-20SL15
'CT-Z1425
'CT-Z1425
© 2005 Panasonic Corporation of North America.
All rights reserved. Unauthorized copying
and distribution is a violation of law.
ORDER NO. MTNC050422C1
B01
Chassis
CME022A

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Summary of Contents for Panasonic CT-20SL15

  • Page 1 Service Manual by anyone else could result in serious injury or death.” The service technician is required to read and follow the “Safety Precautions” and “Important Safety Notice” in this Main Manual. © 2005 Panasonic Corporation of North America. All rights reserved. Unauthorized copying...

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ..............................A1-1 Important Safety Notice ..........................A2-1 Service Notes ............................. A2-2, A2-3 About lead free solder (PbF) ........................A2-4 GENERAL SPECIFICATIONS ........................A3-1~A3-5 DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF ANODE CAP ......................2. NOTE FOR THE REMOVAL OF THE MAIN PCB ................SERVICE MODE LIST ..........................

  • Page 3: 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 4: Service Notes

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

  • Page 6: About Lead Free Solder (Pbf)

    About lead free solder (PbF) Note: Lead is listed as (Pb) in the periodic table of elements. In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder. The Lead Free Solder used in our manufacturing process and discussed below is Sn(Tin)+Ag(Silver) + Cu(Copper).

  • Page 7: General Specifications

    GENERAL SPECIFICATIONS CRT Size / Visual Size 20 inch / 508mmV System CRT Type Flat Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 2 Speaker Position Front Side Size 2 x 4.7 Inch Impedance Sound Output 2.5+2.5 W 10%(Typical) NTSC3.58+4.43 /PAL60Hz Tuning Broadcasting System System M...
  • Page 8 GENERAL SPECIFICATIONS On Screen Menu Display Menu Type Icon Picture Normal Contrast Brightness Color Tint Sharpness Timer Sleep On/Off Timer Sound Bass Treble Balance BBE On/Off Stable Sound On/Off Surround On/Off AI Sound Set Up Language TV/Cable Auto CH Memory Add/ Delete Closed Caption Lock...
  • Page 9 GENERAL SPECIFICATIONS G-10 Remote Unit RC-LH Control Glow in Dark Remocon Back light Remocon Format Matsushita Remocon Format Kaseikyo Custom Code 08-00 h Power Source Voltage(D.C) UM size x pcs UM-3(AA) x 2 pcs Total Keys Keys Keys Power CH Up CH Down Volume Up Volume Down...
  • Page 10 GENERAL SPECIFICATIONS G-11 Features Auto Degauss Auto Shut Off Canal+ Cable Anti-theft Rental Memory(Last CH) Memory(Last Volume) V-Chip Type USA,CANADA Type Auto Search CH Allocation Just Clock Function CH Label VM Circuit Full OSD Premiere Comb Filter Lines Auto CH Memory Hotel Lock Closed Caption AI Sound...
  • Page 11 GENERAL SPECIFICATIONS G-13 Interface Switch Front Power System Select Main Power SW Sub Power Channel Up Channel Down Volume Up Volume Down Rear AC/DC TV/CATV Selector Degauss Main Power SW Indicator Power Stand-by On Timer Terminals Front Video Input = VIDEO2 Audio Input = VIDEO2 RCA x 2 Other Terminal...

  • Page 12: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS INSTALLATION 1. REMOVAL OF ANODE CAP 1. Clean the spot where the cap was located with a small Read the following NOTED items before starting work. amount of alcohol. After turning the power off there might still be a potential voltage that is very dangerous.

  • Page 13: Service Mode List

    SERVICE MODE LIST This unit is provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter to the Service Mode, press both set key and remote control key for more than 2 seconds. Set Key Remocon Key Operations VOL.

  • Page 14: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. ADJUSTMENT PROCEDURE 2. BASIC ADJUSTMENTS Read and perform these adjustments when repairing the 2-1: CONSTANT VOLTAGE circuits or replacing electrical parts or PCB assemblies. Place the set in AV MODE without signal. Connect the digital voltmeter to the TP001. CAUTION Adjust the VR502 until the digital voltmeter is 115 ±...
  • Page 15 ELECTRICAL ADJUSTMENTS 2-6: OSD POSITION 2-11: SEPARATION 1, 2 Activate the adjustment mode display of Fig. 1-1. Please do the method (1) or method (2) adjustment. Press the VOL. UP/DOWN button on the remote Method (1) control until the difference of A and B becomes Set the multi-sound signal generator for each different L-ch minimum.
  • Page 16 ELECTRICAL ADJUSTMENTS 2-13: BRIGHT CENT 2-15: TINT Receive the black pattern*. (RF Input) Receive the color bar pattern. (RF Input) Using the remote control, set the brightness and contrast Using the remote control, set the brightness, contrast, to normal position. color and tint to normal position.
  • Page 17 ELECTRICAL ADJUSTMENTS 3. PURITY AND CONVERGENCE 3-3: STATIC CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 3-2. NOTE Receive the crosshatch pattern from the color bar Turn the unit on and let it warm up for at least 30 generator.
  • Page 18 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) TP024 CP806 CP803 TP022 CP802B CRT PCB CP801A J702 J701 J704 CP101 VR401 R434 FB401 TP001 TU001 VR502 CP502 AC IN CP802A CD1001 CP501 SPEAKER CD501 CP1001 J706 J705 J707 MAIN PCB...

  • Page 19: Block Diagram

    BLOCK DIAGRAM COMB FILTER IC IC1501 TC90A45FG CHROMA IC IC601 M61283BFP C OUT FB401 VIDEO LINE OUT ADin Y OUT J801 Q802, Q806 VIDEO SW(Y) IC BLUE OUT B OUT IC1502 MM1501XNRE Q803, Q805 S-JACK J702 G OUT Vin1 V.OUT Y IN(Y/C) GREEN/RED OUT VIDEO SW(C) IC...

  • Page 20: Printed Circuit Boards Main/Crt

    PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE R432 CP801A R436 C415 W040 J702 R426 J704 S803X W039 J701 VR401 C427 D623 W005 W816 D709 D620 R434 D608 R004 D407 D622 R005 R427 D001 D621 R433 R437 TP001 R1002 R416 R420 D405 C417...
  • Page 21 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE R101 R103 CME022A CCE019A IC902 IC101 R913 Q1502 R108 R134 R122 IC102 R107 IC199 Q103 R810 Q1505 R811 R808 R137 R809 R612 R635 R817 R1517 R622 R145 R133 R628 R627 IC1501 R618 Q1501 Q1507...

  • Page 22: Micon

    MICON SCHEMATIC DIAGRAM ACCESSORY (MAIN PCB) BT001 R6P(AR)XICI D103 OS101 11E1-EIC TM101 RPM7137-WH5 BT002 EUR7613ZD0R R6P(AR)XICI Vout CP101 A2001WR2-7P I2C_SCL R106_1 I2C_SDA I2C_OFF R101 R103 AUDIO L 2.7K AUDIO R R150 CLAMP SW Q103 KTC3875S_Y_RTK FROM/TO CHROMA MICON IC AT+5V C142 IC101 OEC7123A...

  • Page 23: Chroma

    CHROMA SCHEMATIC DIAGRAM (MAIN PCB) W831 R616 FROM/TO COMB FILTER 82 1/2W AT+5V REG V_IN[YUV] Q607 KTC3203_Y VIDEO_IN1 U_IN[YUV] Y_IN[YUV] VIDEO_IN3 R603 1/2W FROM/TO MICON C_V_OUT_SW PROTECT Y_V_OUT_SW C641 P.CON+5V REG VIDEO_OUT C IN(Y/C) Y SW OUT SW_Y_OUT Q606 S802X S802Y FSC_OUT KTC3209_Y...
  • Page 24 DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO DY V.OUTPUT IC IC401 LA78040N-E V801 THERMAL PROTECTION A51LYZ095X80 CP401 A1561WV2-A5P PUMP UP 25.0 12.0 25.0 R407 1.2K 1/4W TO CRT/SVM L402 CD803 (CP805) CH823004 ELH5L4113 R414 R417 R439 +-1% 39K 1/4W 1K 1W MATSUSHITA C425 0.001...
  • Page 25 POWER SCHEMATIC DIAGRAM (MAIN PCB) D516 RELAY DRIVE Q504 10.9 1SS133 KTC3198 R515 10K 1/4W CP503 003P-2100 C516 500V 0.0015 RY501 G5PA-1-SA(WEC) TO SOUND R517 D505 SOUND+B 30PRA60-FC DEGAUSS COIL R501 R541 L503 8R200024 CP502 A1561WV2-2P 1 7W 0.22 1W SHORT SOUND_GND TH501...
  • Page 26 SOUND SCHEMATIC DIAGRAM (MAIN PCB) C1008 FROM TUNER/STEREO 0.001 B MUTE R302 R1015 W852 Q1004 SW_AUDIO_L KTA1504S_Y_RTK R301 2.7K 1/4W 12K 1/4W SW_AUDIO_R R1011 2.7K 1/4W TUNER+5V 2.2K 1/4W 4.75 W803 FROM CHROMA MUTE Q1005 KTA1504S_Y_RTK R1018 P.CON+8V[A] 2.2K 1/4W FROM COMBI/FILTER/AV C1016 P.CON+8V[A]...
  • Page 27 TUNER/STEREO SCHEMATIC DIAGRAM (MAIN PCB) TU001 ENG36A29GF FROM/TO CHROMA TUNER+5V NC NC TUNER_VIDEO W909 P.CON+5V FROM POWER R002 R001 P.CON+B 18K 1/2W 18K 1/2W FROM/TO MICON SW_AUDIO_L SW_AUDIO_R FROM/TO SOUND L901 SW_AUDIO_L 100uH 0305 SW_AUDIO_R TUNER+5V OUT SW IIC Decoder St.PLL Pilot Input...
  • Page 28 COMB/FILTER/AV SCHEMATIC DIAGRAM (MAIN PCB) VIDEO SW(Y) IC IC1502 FROM/TO MICON MM1501XNRE C1503 R1509 Vin1 Y/C_SW C1505 R1510 S_IN 0.01 V.OUT C1514 390 1/4W Vin2 TO SOUND BUFFER Q1502 KTC3875S_Y_RTK R1508 P.CON+8V[A] C1502 C1511 VIDEO SW(C) IC 47P CH 0.01 IC1503 R1501 C1512...
  • Page 29 CRT SCHEMATIC DIAGRAM (CRT PCB) FROM DEFLECTION CP806 005P-2100 FROM DEFLECTION CP801B (CP801A) B2013H02-5P 180V HEATER FOCUS W807 FROM CHROMA CP802B (CP802A) L802 R803 RED/GREEN OUT B2013H02-6P Q804 RED/GREEN OUT CLAMP 150uH 12K 2W KTC4217 Q801 100.6 123.0 KTC3199_Y G.OUT 14F:GREEN OUT R.OUT 27":RED OUT...
  • Page 30 VOLTAGE LIST IC101 IC504 IC902 IC1501 Volt. Volt. Volt. Volt. Volt. 10.7 16.3 IC601 Volt. Volt. IC1502, IC1503 Volt. IC102 Volt. IC1001 Volt. IC199 Volt. IC401 Volt.
  • Page 31 VOLTAGE LIST TRANSISTOR Q103 Q402 Q405 Q502 Q503 Volt. Volt. Volt. Volt. Volt. 114.7 17.3 115.1 159.4 115.5 Q504 Q505 Q507 Q512 Q514 Volt. Volt. Volt. Volt. Volt. 115.4 10.9 115.2 115.7 Q601 Q602 Q604 Q606 Q607 Volt. Volt. Volt. Volt.

  • Page 32: Deflection

    WAVEFORMS MICON 0.5V 10ms/div 13 1V 20µs/div 1 1V 0.1µs/div 9 1V 50µs/div 14 2V 20µs/div 2 1V 1µs/div 10 2V 20µs/div 3 1V 50µs/div 15 2V 20µs/div DEFLECTION 4 1V 0.1ms/div 11 0.5V 20µs/div 16 2V 5ms/div CHROMA 12 1V 2µs/div 7 1V 20µs/div 17 20V 5ms/div NOTE:...

  • Page 33: Sound

    WAVEFORMS 38 50V 20µs/div 33 0.5V 1ms/div 18 10V 10ms/div COMB/FILTER/AV 19 20V 20µs/div 39 50V 20µs/div 28 200mV 20µs/div SOUND 20 2V 20µs/div 22 2V 5ms/div 29 200mV 20µs/div 21 200V 50µs/div 23 2V 5ms/div 37 50V 20µs/div 32 0.5V 1ms/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 34: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW 102B 102A 102B PCB110 (CRT PCB ASS'Y) PCB070 (MAIN PCB ASS'Y) 101C 101G 101F 101H 101E 101D 101B 101A...

  • Page 35: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location No. Part No. Description Reference No. 7A701A395A FRONT CABI ASS'Y 101A 701WPJD004 CABINET,FRONT 101B 712WPBA132 DOOR 101C 713WPA0363 GUIDE,REMOCON 101D 723000C949 SHEET,BUTTON 101E 723576A007 BADGE,BRAND 101F 735WPBB402 BUTTON,FRAME 101G 735WPBB403 BUTTON,POWER 101H 744WUA0019 SPRING,DOOR 7A702A129A BACK CABI ASS'Y 102A 702WPAA861 CABINET,BACK 102B...

  • Page 36: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION Reference No. REF. NO. PART NO. DESCRIPTION Reference No. RESISTORS RESISTORS R001 R002T2183J 18K OHM 1/2W ! R452 R3X181181J R,METAL OXIDE 180 OHM 1W R002 R002T2183J 18K OHM 1/2W R453 R002T4103J 10K OHM 1/4W R004 R002T4221J...
  • Page 37 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS CAPACITORS R801 R803R9221J 220 OHM 1/16W C121 CS0PB0414K 0.01 UF 50V B R802 R002T4272J 2.7K OHM 1/4W C122 CS0PB0N16K UF 10V B ! R803 R3X18A123J R,METAL OXIDE 12K OHM 2W C128...
  • Page 38 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION CAPACITORS DIODES C637 CS0PCH4L1J PF 50V CH D001 D97U03301B DIODE,ZENER MTZJ33B T-77 C638 E00NU2100M UF 16 V D102 D2WT011E10 DIODE,SILICON 11E1-EIC C641 CQGTB0415K 0.1 UF 50V B D103 D2WT011E10 DIODE,SILICON...
  • Page 39 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION MISCELLANEOUS IC601 I06FC1283B M61283BFP BT002 141L003010 BATTERY,MANGAN R6P(AR)XICI IC902 I01FF58290 AN5829S-E1V ! CD501 1209615904 CORD,AC BUSH 9615904 ! IC1001 I0FSP7822A AN17822A CD801 WCL6836038 FLAT CABLE AWM2468 AWG26 5C GRAY 360MM IC1501 I05FEA45FG TC90A45FG...
  • Page 40 Printed in U.S.A.

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