Panasonic CT27G6DE - 27" COLOR TV Service Manual Download Page 38

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SERVICE MODE, CONT. (ELECTRONIC CONTROL)

SERVICE ADJUSTMENT VALUES

Model _____________________________________________ Ser #_____________ Date_________________

Note: Record the original settings PRIOR to modifying the registers.

Mode

Service

Adjustment

Range

Def.

Val.

Original

Value

New

Value

Options Adjustments (Cont.)

KILLER

THRESHOLD

N/A

FACTORY PRESET

ACC SW

N/A

FACTORY PRESET

ACC AMP OFF1

N/A

100

FACTORY PRESET

ACC AMP OFF2

N/A

FACTORY PRESET

ACC AMP ON

N/A

FACTORY PRESET

S10

ACC AMP CTL

N/A

FACTORY PRESET

S11

BGP POSITION

N/A

FACTORY PRESET

S12

OSD R

N/A

FACTORY PRESET

S13

OSD G

N/A

FACTORY PRESET

S14

OSD B

N/A

FACTORY PRESET

S15

NOISE KILLER

TIME

N/A

FACTORY PRESET

S16

NOISE KILLER

(ACC)

N/A

FACTORY PRESET

S17

HV TIMING

N/A

FACTORY PRESET

VCJ Adjustments (Black Expansion)

FORCE BS

N/A

FACTORY PRESET

DET ON/OFF

N/A

FACTORY PRESET

ROM SEL

N/A

FACTORY PRESET

ROM CURVE

N/A

FACTORY PRESET

BS ON/OFF

N/A

FACTORY PRESET

BS TIME

CONSTNAT

N/A

FACTORY PRESET

THRESHOLD V

N/A

FACTORY PRESET

THRESHOLD F1

N/A

129

FACTORY PRESET

THRESHOLD F1

N/A

FACTORY PRESET

THRESHOLD

OFF1

(EFFECT OFF)

N/A

FACTORY PRESET

THRESHOLD F2

N/A

FACTORY PRESET

THRESHOLD F2

N/A

FACTORY PRESET

THRESHOLD

OFF2

(EFFECT OFF)

N/A

FACTORY PRESET

Mode

Service

Adjustment

Range

Def.

Val.

Original

Value

New

Value

VCJ Adjustments, Cont. (Black Expansion)

THRESHOLD F3

N/A

FACTORY PRESET

THRESHOLD F3

N/A

FACTORY PRESET

THRESHOLD

OFF3

(EFFECT OFF)

N/A

FACTORY PRESET

P10

THRESHOLD

ON1

N/A

FACTORY PRESET

P11

THRESHOLD

ON2

N/A

FACTORY PRESET

P12

THRESHOLD

ON3

N/A

FACTORY PRESET

P13

CURVE1

N/A

FACTORY PRESET

P14

CURVE2

N/A

FACTORY PRESET

P15

CURVE3

N/A

FACTORY PRESET

P16

RATIO1

N/A

FACTORY PRESET

P17

RATIO2

N/A

FACTORY PRESET

P18

RATIO3

N/A

FACTORY PRESET

Other Adjustments (With FM)

AFCT

127

AFCB

0 ~

127

AFCC

0 ~

127

CLOCK

0 ~ 255

128

Other Adjustments (Without FM)

AFCT

127

AFCB

0 ~

127

AFCC

0 ~

127

CLOCK

0 ~ 255

128

Note: Some adjustments modes may not be

available on all models, depending on
applicability.

Printed in USA

K01022221ZR0228

Summary of Contents for CT27G6DE - 27" COLOR TV

Page 1: ...s 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 SP 2724E EC363 SP 2724UE EC363 ORDER NO MTNC010306C1 B5 Chassis Models This Service manu...

Page 2: ...c shielding The safety glass provide shielding for the tube viewing area against X ray radiation as well as implosion The magnetic shield limits the X ray radiation around the bell of the picture tube in addition to the restricting magnetic effects When using a picture tube test jig for service ensure that the jig is capable of handling 50kV without causing X ray radiation Beforereturningaserviced...

Page 3: ...nvergence Corrector Strip 12 Service Mode Electronic Controls 14 Instructional Flow Chart for Service Mode 20 Service Adjustments Electronic Control 22 Sub Contrast 22 Sub Brightness 22 Tint Color Adjustment 22 White Balance 23 Sub Brightness Final Adjustment 23 Horizontal Centering 23 Vertical Size 24 MTS Circuit Adjustment 24 Input Level Adjustment 24 Stereo Separation Adjustment 24 Clock Adjust...

Page 4: ... 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 How to Replace Flat IC Required Tools 1 Cut the pins of a defective IC with wire cutters Remove IC from board If IC is glued to the board heat the IC and releas...

Page 5: ...are out of tolerance immediate service and correction is required to insure safe operation and to prevent the possibility of premature component failure Equipment 1 Isolation transformer 2 High voltage meter 3 Short jumper 4 Jumper diode same as D823 PN S3L60P154004 Diode should be rated a minimum of 150V Procedure 1 Connect the Receiver to an isolation transformer Turn Receiver ON 2 Apply a monos...

Page 6: ... input rear front N A 1 0 1 0 Headphone Jack X X N A Dimensions mm WxDxH in 633 4 x 491 8 x 568 24 9 x 19 4 x 22 4 665 2 x 545 x 594 8 26 2 x 21 5 x 23 4 731 x 684 x 614 28 8 x 26 9 x 24 2 Weight kg lbs 29 63 8 35 77 2 35 77 2 Power source V Hz 120 60 120 60 120 60 Anode voltage 29 25kV 1 25kV 29 25kV 1 25kV 29 25kV 1 25kV Video input jack 1Vp p 75Ω phono jack 1Vp p 75Ω phono jack 1Vp p 75Ω phono ...

Page 7: ... are displayed Channel Buttons Press to select programmed channels Press to highlight desired features when menus are displayed Also use to select Cable Converter box channels after programming Remote Control Infra red codes the TV AUX CABLE switch must be set in CABLE position Action Button Press to display Main Menu and access On Screen feature and Adjustment Menus TV Video Button Press to selec...

Page 8: ... TV sound and navigate in menus MUTE Press to mute sound Press to accessandcancel CC Closed Caption 0 9 Pressnumerickeypadtoselect any channel R TUNE Press to switch to previously viewedchannelorvideomode CH Press to select next channel and navigate in menus ACTION Press to access menus RECALL Presstodisplaytime channel sleep timer and other options REW PLAY FF TV VCR STOP PAUSE REC VCR DBS CH Com...

Page 9: ... from the main board 3 Unplug the CRT 2nd anode button from the main board 4 Remove the C Board from the CRT base and unplug the black wire CRT dag ground C10 5 Disconnect the A11 A12 and Speakers plugs from the A Board 6 Lift the Main Chassis A Board and all mounted boards completely out with the CRT Board attached CRT Replacement 1 Perform Disassembly for CRT Replacement procedure 2 Insure that ...

Page 10: ... that B voltage is 130 0V 2 5V This voltage supplies B to the Horizontal Output Flyback circuits Source Voltage Chart 120V AC line input Set the Bright and the Picture to Minimum by using the Picture Menu Use cold ground for the lead of the DVM Adjust Picture Menu for normalized video adjustments High Voltage Check 1 Select an active TV channel and confirm that horizontal is in sync 2 Adjust Brigh...

Page 11: ...ion yoke back and forth on the neck of the CRT until it produces a near white uniform raster Vertical Raster Shift Adjustment Only for ModelswithPurity ConvergenceAssemblywith4Pairs of Rings Apply a green pattern with a horizontal line adjust the Deflection Yoke so that has no tilt then secure it Adjust center line of the pattern with the mechanical center of the CRT this center is determined by t...

Page 12: ...rity has not been achieved repeat the above procedure Final Convergence Procedure see Fig 11 through Fig 13 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...

Page 13: ... 13 Figure 11 Vertical Yoke Movement Figure 12 Horizontal Yoke Movement Figure 13 Convergence Magnets and Wedges Location Note For models using 4 pairs of rings assemblies see Fig 6 for details ...

Page 14: ...additional indicators appear on screen One is the five digit usage in hours and the other two are four digits for V Chip Main and Child ratings Indicators are hexadecimal numbers 8 Press the Power Button on the Remote Control to select one of seven Service Adjustment Modes 1 B Service VCJ SUB DATA adjustments 2 C Service VCJ CUT OFF adjustments 3 M Service MTS adjustments 4 P Service VCJ adjustmen...

Page 15: ...actory preset 88 CD ACL REF factory preset 74 CE ACL REF factory preset 64 CF ACL REF factory preset 48 C10 ACL REF factory preset 40 C11 ACL REF factory preset 31 C12 ACL REF factory preset 20 C13 ACL COEF factory preset 124 C14 ACL COEF factory preset 117 1 Press Channel Up Down on the Remote Control to select one of the available Service Adjustments a in Fig 14 Note Write Down the original valu...

Page 16: ...ATION 6 M3 AGC ADJ factory preset 0 VCJ Adjustment Default Level S0 SHARPNESS PW factory preset 3 S1 SHARPNESS OW factory preset 3 S2 HALFTONE factory preset 0 S3 TVC DELAY factory preset 0 S4 TVY DELAY factory preset 0 S5 GAMMA FOLDING POINT factory preset 13 S6 VIDEO Y DELAY factory preset 0 S7 VIDEO C DELAY factory preset 0 S8 COMB BPF factory preset 0 S9 COMB 2D factory preset 1 SA COLOR KILLE...

Page 17: ... preset 4 P7 THRESHOLD F1 factory preset 129 P8 THRESHOLD F1 factory preset 1 P9 THRESHOLD OFF1 EFFECT OFF factory preset 35 PA THRESHOLD F2 factory preset 99 PB THRESHOLD F2 factory preset 1 PC THRESHOLD OFF2 EFFECT OFF factory preset 30 PD THRESHOLD F3 factory preset 80 PE THRESHOLD F3 factory preset 1 PF THRESHOLD OFF3 EFFECT OFF factory preset 21 P10 THRESHOLD ON1 factory preset 37 P11 THRESHO...

Page 18: ...M X0 AFCT 60 83 X1 AFCB 29 44 X2 AFCC 42 64 X3 CLOCK 128 128 CH CH PW TO B ITEMS Helpful Hints Entering Service Mode Back Open Method 1 While the Receiver is ON and operating in Normal Mode momentarily short test point FA1 TP8 to Cold Ground FA2 TP3 A Board The Receiver enters the Aging Mode Yellow letters CHK appear in the upper left corner of the CRT The Volume Up Down will adjust rapidly 2 Simu...

Page 19: ... 19 Notes ...

Page 20: ...t to nominal level SERVICE MODE CHK turns red Volume Up Down operate normally Custumer Controls are set to nominal level SUB DATA ADJUSTMENTS B ITEMS QUICK ENTRY TO SERVICE MODE Select CABLE Mode Set SLEEP time for 30 60 or 90 Min Tune to Channel 124 Adjust Volume to minimum Press VOL DOWN On Receiver EXIT EXIT N Y N Y C ON REMOTE RECALL Press Action and Power on the Receiver simultaneously for at...

Page 21: ... SELECT ADJUSTMENT ON REMOTE TO ADJUST THE LEVEL CH VOL VOL Adj needed N Y POWER ON REMOTE EXIT C N IMPORTANT Always Exit the Service Mode Following Adjustments Press Action and Power on the Receiver simultaneously for at least 2 seconds Note Only applicable settings for the Receiver serviced will be available ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST THE LEVEL CH VOL VOL B ...

Page 22: ...rvice DAC Adjustment B2 Due to the characteristics of this chassis Sub brightness adjustments are not necessary For good brightness level set the register to 127 the default level Perform Sub Brightness Final Adjustment on page 23 only if a different brightness level is required for the picture Tint Color Adjustment Service DAC Adjustment B1 B0 Preparation 1 Apply a rainbow color bar signal 2 Pres...

Page 23: ...les and observe black and white tracking 4 If corrections are required repeat step 1 until the correct balance is achieved 5 Following satisfactory High Lights adjustment perform the following White Balance Touch Up White Balance Touch Up Procedure Use this procedure to make minor adjustment to white balance 1 Enter Service Mode 2 Apply a black and white B W signal signal that includes gray tones ...

Page 24: ...dulation Audio 300Hz 100 modulation stereo left only 70 5dB 75Ω OPEN P S 10dB 3 Adjust the MTS Low Level Separation Adjustment M2 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 100 modulation stereo left only 70 5dB 75Ω OPEN P S 10dB 5 Adjust the MTS High Level Separation Adjustment M...

Page 25: ... part of T551 Preparation Connect a Signal generator and select a dot pattern Procedure Adjust the FOCUS control VR to obtain the sharpest and clearest dot pattern a Adjust for best center b Adjust for best area between the center and top right corner ...

Page 26: ...ation of Components Figure 26 Back Cover Removal CT 25G6E CE UE CT 27G6 DE UE Figure 27 Back Cover Removal SP 2724E UE Screw Screw Screw Screw Screw Screw Screw Screw Screw Screw Screw Screw Screw Screw Screw Screw ...

Page 27: ...to cabinet by 4 screws on corners of CRT DAG ground Anode high voltage C board Tuner A V jacks Flyback T551 Note After servicing the Receiver dress cables and wires as indicated Yoke Speaker 4 screws Speaker 4 screws Degaussing coil CRT Socket Q351 R Out Q352 G Out Q353 B Out ...

Page 28: ...NR001 Tuner S VHS A V Jacks Focus IC001 MPU Components on trace side Flyback T551 IC050 Halftone IC2301 Right Audio Amp IC2302 Left Audio Amp F801 Fuse Q551 H Out Q501 H Drive IC801 VCO IC002 EEPROM IC005 3 3 V IC2201 MTS IC3101 AV SW on trace side RL801 Relay D801 Rect Bridge IC551 9V Reg IC552 5V Reg ...

Page 29: ...ros de parte de los componentes y sus valores en la lista de partes La medición de los voltajes se hizo con un Voltímetro Digital Notes Check Parts List for most recent component values and part numbers Obtain voltages with a digital multimeter The board layouts were modified to enhance and display traces otherwise hidden by a mask Q354 2 90 7 50 2 40 Q355 2 90 7 40 2 40 Q356 2 90 7 40 2 40 B C E ...

Page 30: ... 40 A BOARD SCHEMATIC LEFT PORTION DIAGRAMA ELÉCTRICO TARJETA A SECCIÓN IZQUIERDA A BOARD TARJETA A CT 25G6E CE UE ...

Page 31: ...BOARD SCHEMATIC RIGHT PORTION DIAGRAMA ELÉCTRICO TARJETA A SECCIÓN DERECHA A BOARD TARJETA A CT 25G6E CE UE B E C CHIP TRANSISTOR LEAD DESIGNATION B E C IDENTIFICACIÓN DE TERMINALES PARA TRANSISTORES EN CHIP ...

Page 32: ... 42 A BOARD SCHEMATIC LEFT PORTION DIAGRAMA ELÉCTRICO TARJETA A SECCIÓN IZQUIERDA A BOARD TARJETA A CT 27G6E CE UE SP2724E UE ...

Page 33: ... SCHEMATIC RIGHT PORTION DIAGRAMA ELÉCTRICO TARJETA A SECCIÓN DERECHA A BOARD TARJETA A CT 27G6E CE UE SP2724E UE B E C CHIP TRANSISTOR LEAD DESIGNATION B E C IDENTIFICACIÓN DE TERMINALES PARA TRANSISTORES EN CHIP ...

Page 34: ...2 3 4 5 6 5 01 GND n c 3 26 GND 5 01 IC006 1 2 3 5 00 4 98 GND IC003 1 2 3 4 97 GND 4 98 IC2201 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 16 2 17 2 16 2 23 2 17 0 43 4 91 2 42 2 47 0 51 2 26 0 00 3 34 2 16 3 29 3 45 GND 4 97 0 20 n c 2 24 2 20 2 17 2 17 IC2301 1 2 3 4 5 6 7 8 9 10 11 12 14 00 n c 13 70 GND 9 90 2 71 16 81 GND 4 98 8 80 3 41 18 81 IC553 1 2 3 8 96 GND 8 91 IC...

Page 35: ... señal La medición puede hacerse en el punto con mayor accesibilidad siempre que sea común al indicado 2 Se midieron utilizando un generador con formato NTSC conectado a la terminal de la antena Patrón de 8 Barras de Colores EAI formato NTSC de 100 IREs para el Blanco y 7 5 IREs para el Negro 3 Los ajustes de usuario de los Menus PICTURE y AUDIO se normalizaron Posteriormente el nivel de volumen s...

Page 36: ... 46 A C BOARDS LAYOUT CIRCUITO IMPRESO DE LAS TARJETAS A Y C A C BOARDS TARJETAS A Y C ALL MODELS TODOS LOS MODELOS ...

Page 37: ...ET C12 ACL REF N A 20 FACTORY PRESET C13 ACL COEFF N A 124 FACTORY PRESET Mode Service Adjustment Adjustment Range Def Val Original Value New Value Cut Off Adjustments Cont C14 ACL COEFF N A 117 FACTORY PRESET C15 ACL COEFF N A 94 FACTORY PRESET C16 ACL COEFF N A 80 FACTORY PRESET C17 ACL WAIT N A 2 FACTORY PRESET C18 ACL THRESHOLD N A 9 FACTORY PRESET C19 MACROVISION N A 3 FACTORY PRESET C1A OSD ...

Page 38: ...ET P5 BS TIME CONSTNAT N A 5 FACTORY PRESET P6 THRESHOLD V N A 4 FACTORY PRESET P7 THRESHOLD F1 N A 129 FACTORY PRESET P8 THRESHOLD F1 N A 1 FACTORY PRESET P9 THRESHOLD OFF1 EFFECT OFF N A 35 FACTORY PRESET PA THRESHOLD F2 N A 99 FACTORY PRESET PB THRESHOLD F2 N A 1 FACTORY PRESET PC THRESHOLD OFF2 EFFECT OFF N A 30 FACTORY PRESET Mode Service Adjustment Adjustment Range Def Val Original Value New...

Page 39: ...tudes may vary depending on the type of Oscilloscope used and its settings 5 Ground symbol shown on waveform number indicates Hot ground lead connection of the Oscilloscope CAUTION Incorrect ground connection of the test equipment will result in erroneous readings 3 VOLTAGE MEASUREMENTS 1 Voltage measurement AC input to the Receiver is 120V NTSC HD 1125i 525P when applicable signal generator is co...

Page 40: ...encia de la señal y el contenido de la imagen Las fuentes de voltajes son nominales 2 El símbolo indica el tipo de tierra que se utiliza en la conexión del medidor PRECAUCION SI no se utiliza la conexión a la tierra adecuada se obtendrán mediciones equivocadas y podría dañar el equipo de medición MEDICIÓN DE FORMAS DE ONDA 1 Un símbolo como indica el punto para medir una señal La medición puede ha...

Page 41: ...Schematic Notes 38 PARTS LIST NOTES ...

Page 42: ...390PF K 50V C352 ECJ2VB1H391K CAP C 390PF K 50V C353 ECJ2VB1H471K CAP C 470PF K 50V C354 ECKW3D102KBN CAP C 001UF K 2KVDC C357 EEANA1E1R0B CAP E 1 0UF 25V C361 ECJ2VC1H151J CAP C 150PF J 50V C362 ECJ2VC1H151J CAP C 150PF J 50V C363 ECJ2VC1H151J CAP C 150PF J 50V C370 ECA1HM100B CAP E 10UF 50V CT 25G6E CE UE CT 27G6E DE UE C451 ECA1CHG470B CAP E 47UF 16V C452 ECSF1EE105VB CAP E 1 0UF 25V C453 ECEA1...

Page 43: ...E 100UF 16V C2215 EEANA1E100B CAP E 10UF 25V C2216 ECJ2VC1H100D CAP C 10PF D 50V C2301 ECA1VM102E CAP E 1000UF 35V C2302 ECEA1HN010UB CAP E 1UF 50V C2303 ECA1EM101B CAP E 100UF 25V C2304 ECA1EM100B CAP E 10UF 25V C2307 ECA1CM102B CAP E 1000UF 16V C2311 ECA1VM102E CAP E 1000UF 35V C2312 ECEA1HN010UB CAP E 1UF 50V C2313 ECA1EM101B CAP E 100UF 25V C2314 ECA1CM100B CAP E 10UF 16V C2317 ECA1CM102B CAP ...

Page 44: ...COIL PEAKING 33UH L011 ELESN330JA COIL PEAKING 33UH L014 ELESN180KA COIL PEAKING 18UH L015 EXCELSA35T FERRITE BEAD L016 EXCELSA35V FERRITE BEAD CT 25G6CE SP 2724E UE CT 27G6E DE UE L017 TLUABTA100K COIL PEAKING 10UH CT 25G6CE REF NO PART NO DESCRIPTION L018 TLUABTA150K COIL PEAKING 15UH CT 25G6CE CT 27G6DE L090 EXCELSA24T FERRITE BEAD L108 EXCELSA35V FERRITE BEAD L351 TLTABT101K COIL PEAKING L416 ...

Page 45: ...063 ERJ6GEYJ331V RES M 330 J 1 10W R064 ERJ6GEYJ331V RES M 330 J 1 10W R065 ERJ6GEYJ821V RES M 820 J 1 10W R066 ERJ6GEYJ821V RES M 820 J 1 10W R067 ERJ6GEYJ821V RES M 820 J 1 10W REF NO PART NO DESCRIPTION R068 ERJ6GEYJ241V RES M 240 J 1 10W R069 ERJ6GEYJ821V RES M 820 J 1 10W R070 ERJ6GEYJ102V RES M 1K J 1 10W R071 ERJ6GEYJ102V RES M 1K J 1 10W R072 ERJ6GEYJ102V RES M 1K J 1 10W R078 ERJ6GEYJ103V...

Page 46: ...6E DE UE R532 ERJ6ENF1502V RES M 15K F 1 10W SP 2724E UE R533 ERJ6ENF1781V RES M 1 78K F 1 10W CT 27G6E DE UE R533 ERJ6ENF1821V RES M 1 82K F 1 10W CT 25G6E CE UE R533 ERJ6ENF1781V RES M 1 78K F 1 10W SP 2724E UE R551 ERDS1FJ1R0T RES C 1 0 J 1 2W R552 ERDS1FJ1R0T RES C 1 0 J 1 2W REF NO PART NO DESCRIPTION R554 ERG2FJ390H RES M 39 J 2W CT 25G6E UE CT 27G6E DE UE R556 ERG1SJ221P RES M 220 J 1W R557...

Page 47: ...1 AC LINE CORD CT 25G6E CE UE M007 TSX2AA0281 AC LINE CORD SP 2724E UE CT 27G6E DE UE M008 TMW2A97121 STRAIN RELIEF AC LINE CORD SP 2724E UE CT 27G6E DE UE M009 A63QDB891X CRT 25 CT 25G6E CE UE M010 A68QDN891X CRT 27 CT 27G6E DE UE REF NO PART NO DESCRIPTION M011 M68LGL061X CRT 27 SP 2724E UE M012 TJSC00300 CRT SOCKET DY TLY2AA006 DEFLECTION YOKE SP 2724E UE DY TLY2AA013 DEFLECTION YOKE CT 25G6E C...

Page 48: ...T 25G6E UE M034 TQB2AA0395 1 MANUAL OWNERS CT 27G6DE M035 TQB2AA0396 MANUAL OWNERS CT 25G6CE REF NO PART NO DESCRIPTION M036 TQB2AA7095 REMOTE GUIDE CT 25G6E CE UE M037 TQB2AA7057 REMOTE GUIDE CT 27G6E DE UE M038 TQB2AA7069 REMOTE GUIDE SP 2724E UE M039 TQB2AA7108 V CHIP MANUAL REF NO PART NO DESCRIPTION DESCRIPTION OF ABBREVIATIONS GUIDE RES C 270 J 1 4 CAP P 068UF K 50V RESISTOR TYPE TOLERANCE C...

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