Toshiba 20A42 Service Manual Download Page 22

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R418

39K+-1%

R424

18K +-1%

R408

4.7K

+-1%

R417

22K

+-1%

R420

15K +-1%

R409

15K +-1%

VR402

47K

V.LIN.

METAL

VR401

V.POSI.

METAL

T401

ETH14Y46AY

345

CD801

SM1098-009-1A

CP801

A2361WV2-2P

B
G
R

6
8

V801

A51LMV10X20N45

Q401

2SD2499(LBOEC1)

H.OUTPUT

R429

1.8 2W

IC401

AN5522

V-OUT IC

TP024

TP023

TP022

CP803A B2013H02-4P

CP803B B2013H02-4P

CP401

A1561WV2-A5P

Q404

KRC102MAT

SWITCHING

IS NON POLAR ONE.

THE ALUMI ELECTROLYTIC CAPACITOR MARKED NP

THE RESISTOR MARKED F IS FUSE RESISTOR.

NOTE:

L401

ELH5L4113

CP402

003P-2100

CP806_1

HS401

763WAA0232

IC402

KIA7809API

9V REG. IC

J801_2

CVT3275-5101

GND

ABL

GND

TER

HEA

E27

E12

B+

E180

AFC

COL

FB401

FQI-20B001R

CP802A B2013H02-5P

CP802B B2013H02-5P

D407

1N4937

D410

1N4937

D411

1N4937

D408

1N4937

D412

11E1-EIC

D401

1SS133

Q402

KTC4217

H.DRIVE

Q405

KTC3198

H-CTL SW

Q804

KTC4217

RED AMP

Q805

KTC4217

GREEN AMP

Q806

KTC4217

BLUE AMP

R402

1K 1W

R805

12K

R807

12K

R803

12K

R450

820

CAUTION: DIGITAL TRANSISTOR

Q403

KRA104MAT

X-RAY TEST SW.

CAUTION: DIGITAL TRANSISTOR

DEFLECTION SIGNAL

B.SIGNAL

G.SIGNAL

R.SIGNAL

WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.

WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST

NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED

C434

50V

C427

50V

C409

100P

500V

C443_1

0.0075

1.5KV

MPP

C401_1

220P

500V

C402

0.001

2KV

C439

22P

500V

C406

0.001

500V

C809

560P

C810

470P

C811

560P

C802

0.001

2KV

C440

0.0022

500V

C407

27P

C801

330P CH

C420

0.1

100V

MKT

C403

0.22

100V

MKT

C405

0.1

C437_2

0.47

200V

FHS

C417

50V

C414

100

35V

C433

470

35V

C448

250V

C447

470

16V

C418

2200

25V

C445

50V

C446

50V

C812

2.2

250V

R404

220

R816

330

R813

330

R809

3.9K

R814

3.9K

R446

4.7K

1/2W

R411

1/2W

R412

470

1/2W

R437 1.2K

R427

100

1/4W

R433

470

1/2W

R432

680

1/2W

R410

680

1/2W

R445

150K 1/2W

R802

2.7K

1/4W

R806

2.7K

1/4W

R815

330

R811

3.9K

R804

2.7K

1/4W

R413

1.8K

1/2W

R406

1/2W

R422

6.8K

1/2W

R407

2.2

1/2W

R436

2.2

1/2W

R405

10K 1/4W

R421

68K 1/4W

OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE

NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME

DANS LA NOMENCLATURE DES PIECES

N’UTILISER QUE CELLS DECRITES

DANGEREUSES AN POINT DE VUE SECURITE

ETANT

LES PIECES REPAREES PAR UN

ATTENTION:

DESCRIBED IN PARTS LIST ONLY

CRITICAL FOR SAFETY,USE ONES

ARE

SINCE THESE PARTS MARKED BY

CAUTION:

D405

MTZJ6.2B

D404

MTZJ5.1B

D419

MTZJ30B

D418

MTZJ30B

W811

W880

W879

W808

W802

W833

W873

W872

W849

W871

W867

W846

W875

W874

W876

W885

TP402

W838

W844

CLAMP

GND

G.OUT

R.OUT

B.OUT

V_FEEDBACK

HEATER

V_OUT

ABCL

H_SYNC

180V

H_OUT

GND

X-RAY

X-RAY_TEST

GND

H_CTL

AT+5V

P.CON+9V

GND

P.CON+9V

GND

H_DV_+B

114.0

27.0

0.3

0.447

5.03

0.031

PCB110

TCB399

PCB010
TMB540

132.7

5.92

6.34

130.6

6.34

5.95

5.92

130.6

6.34

99.6

101.6

6.4

96.4

3.65

22.8

63.9

40.1

7.34

46.1

115.0

118.1

289

16.27

9.0

G.OUT

16.0

9.6

16.1

3.9

26.1

2.2

AMP

+
-

PUMP

PROTECTION

THERMAL

GND

VCC

GND

HEATER

180V

3.9

SCREEN

FOCUS

DEFLECTION/CRT SCHEMATIC DIAGRAM

GND

CLAMP

R.OUT

B.OUT

CLAMP

GND

R.OUT

B.OUT

HEATER

GND

180V

G.OUT

HEATER

GND

180V

CLAMP

GND

R.OUT

B.OUT

OUT

FROM/TO CHROMA

FROM/TO MICON/TUNER

FROM POWER

TO SOUND

TO AV

(MAIN PCB)

(CRT PCB)

Summary of Contents for 20A42

Page 1: ...SERVICE MANUAL COLOR TELEVISION 20A42 FILE NO 050 200209 DOCUMENT CREATED IN JAPAN Jun 2002 ...

Page 2: ...t which has the same character Especially as to the important parts for safety which is indicated in the circuit diagram or the table of parts as a mark the designated parts must be used 4 PUT PARTS AND WIRES IN THE ORIGINAL POSITION AFTER ASSEMBLING OR WIRING There are parts which use the insulation material such as a tube or tape for safety or which are assembled in the condition that these do n...

Page 3: ... Receive CH Destination Ohers Tuning System F Synth Input Impedance VHF UHF 75 ohm 2 69 4A A 5 A 1 CH Coverage A I J W W 1 W 84 Intermediate Picture FP 45 75MHz Frequency Sound FS 41 25MHz FP FS 4 50MHz Preset CH No Stereo Dual TV Sound Yes Tuner Sound Muting Yes G 3 Power Power Source AC 120V AC 60Hz DC Power Consumption at AC 90 W at AC 120 V 60 Hz Stand by at AC 5 W at AC 120 V 60 Hz Per Year k...

Page 4: ...Stream DVD DTV No Control Level Yes Volume Yes Brightness Yes Contrast Yes Color Yes Tint NTSC Only Yes Sharpness Yes Tuning No Bass Yes Treble Yes Balance Yes Back Light No Stereo Audio Output SAP Yes Video Yes Color Stream No Channel TV Cable Yes CH Label No Game Timer Yes Sleep Timer Yes Sound Mute Yes V chip Rating Yes G 8 OSD Language English French Spanish OSD Language Setting English G 9 Cl...

Page 5: ...s 5 Yes 6 Yes 7 Yes 8 Yes 9 Yes 0 Yes 100 No CH Up Yes CH Down Yes Volume Up Yes Volume Down Yes TV Caption Text Yes CH1 CH2 Yes TV Video TV AV Yes CH RTN CH ENT Quick View Yes Sleep Yes RE Call Call Yes Reset Yes Menu Yes Enter Yes Mute Yes Exit No MTS Audio Select Yes Set Yes Set Yes Multi Brand Keys CH Up VCR No CH Down VCR No Pause Still No TV VCR VCR No Code No FF No Rew No Rec No Play No Sto...

Page 6: ...H Lock Yes Video Lock Yes Game Timer Yes Energy Star No Favorite CH No G 12 Accessories Owner s Manual Language English French W Warranty Yes Remote Control Unit Yes Rod Antenna No Poles Terminal Loop Antenna No Terminal U V Mixer No DC Car Cord Center No Guarantee Card No Warning Sheet No Circuit Diagram No Antenna Change Plug No Service Facility List No Important Safety Instruction No Dew AHC Ca...

Page 7: ...ar2 No Video Output No Audio Output No Euro Scart No Color Stream No Diversity No Ext Speaker No DC Jack 12V Center No VHF UHF Antenna Input F Type AC Outlet No G 14 Set Size Approx W x D x H mm 590 x 492 x 446 5 G 15 Weight Net Approx 18 6kg 41 0 lbs Gross Approx 22 1kg 48 7 lbs G 16 Carton Master Carton No Content Sets Material Dimensions W x D x H mm x x Description of Origin No Gift Box Yes Ma...

Page 8: ... Flip up the sides of the Rubber Cap in the direction of the arrow and remove one side of the support Refer to Fig 1 2 2 DISASSEMBLY INSTRUCTIONS GND on the CRT Screwdriver Alligator Clip Support CRT GND on the CRT Rubber Cap CRT Support Fig 1 1 Fig 1 2 3 After one side is removed pull in the opposite direction to remove the other NOTE Take care not to damage the Rubber Cap INSTALLATION 1 Clean th...

Page 9: ...ng a blower type IC desoldering machine Refer to Fig 2 2 2 Fig 2 2 NOTE Do not add the rotating and the back and forth directions force on the IC until IC can move back and forth easily after desoldering the IC leads completely When IC starts moving back and forth easily after desoldering completely pickup the corner of the IC using a tweezers and remove the IC by moving with the IC desoldering ma...

Page 10: ... Thin tip Soldering Iron NOTE When the IC leads are bent during soldering and or repairing do not repair the bending of leads If the bending of leads are repaired the pattern may be damaged So be always sure to replace the IC in this case Finally confirm the soldering status on four sides of the IC using a magnifying glass Confirm that no abnormality is found on the soldering position and installa...

Page 11: ... the remote control for more than 1 second ADDRESS and DATA should appear as FIG 1 ADDRESS is now selected and should blink Using the SET button on the remote step through the ADDRESS until required ADDRESS to be changed is reached Press ENTER to select DATA When DATA is selected it will blink Again step through the DATA using SET button until required DATA value has been selected Pressing ENTER w...

Page 12: ...0 TV 00 OSD 15 2 BASIC ADJUSTMENTS 2 2 RF AGC Place the set with Aging Test for more than 15 minutes Receive the VHF HIGH 63dB Connect the digital voltmeter to the TP001 Activate the adjustment mode display of Fig 1 1 and press the channel button 02 on the remote control to select RF AGC Press the VOL UP DOWN button on the remote control until the digital voltmeter is 2 5 0 05V 1 2 3 4 5 2 3 CUT O...

Page 13: ...and press the channel button 03 on the remote control to select V VCO Press the VOL UP DOWN button on the remote control until the digital voltmeter is 2 5V 1 2 3 4 5 2 13 SUB TINT SUB COLOR 1 2 3 4 5 6 7 8 9 10 Receive the color bar pattern RF Input Activate the adjustment mode display of Fig 1 1 and press the channel button 22 on the remote control to select TINT Connect the oscilloscope to TP02...

Page 14: ... CH UP button once the set to SEP 2 mode Then perform the above adjustment 4 Method 2 1 2 3 4 5 6 7 8 Set the multi sound signal generator L ch 1KHz R ch Non input and receive the RF Connect the oscilloscope to the pin 7 of CP601 Activate the adjustment mode display of Fig 1 1 and press the channel button 26 on the remote control to select SEP 1 Press the VOL UP DOWN button on the remote control t...

Page 15: ...rforming adjustments in section 3 1 1 2 3 4 5 Receive the green raster pattern from color bar generator Adjust the pair of purity magnets to center the color on the screen Adjust the pair of purity magnets so the color at the ends are equally wide Move the deflection yoke backward to neck side slowly and stop it at the position when the whole screen is green Confirm red and blue color Adjust the s...

Page 16: ...N GUIDE WIRING CONNECTION CRT TU001 CP401 VR502 FB401 S501B VR401 VR402 J701 CP601 S501A CP1001 TP001 AC IN T501 MAIN PCB CP806 CRT PCB SPEAKER TP402 CP802B CP803B CP803A CP802A TP022 TP024 J1001 J712 J711 J710 CP502 CRT L503 IC901 W055 J801 C D 8 0 1 CRT CP801 ...

Page 17: ...OUT VIF IN 1 G IN B IN R IN RF AGC OUT POWER ON CONT H OUT VREG Vcc VIF IN 2 20 SCL 26 SDA 27 INV FBP OUT 10 V PULSE OUT 5 V OUT 28 FPB IN 14 DEGAUSS_H 16 13 STEREO 5V REG Q605 REG Q608 REG Q604 X602 3 579545MHz 31 11 49 8 7V REG OUT P CON 5 7V REG AT5 7V REG OUT Y SW OUT R OUT G OUT 47 RECTIFIER 16 B OUT Q606 REG REG Q603 AT 5V 3 4 6 2 2 REAR_AV IN STEREO J701 FEED BACK SW Q507 BUFFER Q502 SWITCH...

Page 18: ...1 HS 1001 W163 C 504 C 1006 W148 R 1012 R 1013 W011 C533_1 CP503 W171 D509 R 502 C 530_1 R 503 W172 D521 D508 C810 W808 W802 C811 C809 W873 R 806 CP806_1 Q805 Q804 Q806 R 802 R 804 W871 W811 W872 CP801 R805 R 803 R 807 J 801_2 S 501A C 503 C 502 R 54 3 R 520 R 504_1 R Y501 Q501 Q502 R 500 C 509 R 542 C 511 HS 501 T H 50 1 C507 S 501B D501 D503 D504 CP502 FH501 F501 FH502 L501 TP022 C802 W160 TP024...

Page 19: ...6 C1518 IC1501 R306 R708 R709 R711 R734 R733 R112 C609 C103 C104 R108 C007 R109 R635 C322 C303 C321 C315 Q901 R901 Q902 R902 C634 R106 R105 R130 C120 C138 R137 R136 R621 R606 R128 R135 R126 R101 R1003 R1001 C1004 C1002 R1002 Q1001 C1003 R1014 R505 R506 R507 C512 R809 R814 R816 R811 R815 R813 C801 C519_1 C1001 R125 R138 C316 C323 R308 Q607 R513 R1015 R508 R904 C917 C912 IC901 C914 C918 C916 C913 C9...

Page 20: ...CE THESE PARTS MARKED BY CAUTION D001 MTZJ33B W845 W899 W801 W810 TP001 TM101 RC EH030 L101 2 7uH BT002 R03 AB E_20_T BT001 R03 AB E_20_T IC199 S 24C04BDP LA MEMORY IC 1 2 3 4 5 6 7 8 SW105 SKHVBED010 20 25 27 POWER SW104 SKHVBED010 25 27 VOL DOWN SW103 SKHVBED010 25 27 VOL UP SW102 SKHVBED010 25 27 CH DOWN SW101 SKHVBED010 20 CH DOWN 25 27 CH UP IC101 OEC7072A MICON IC 1 10 11 12 13 14 15 16 17 1...

Page 21: ...ATIC DIAGRAM IS THE LATEST AT THE TIME DANS LA NOMENCLATURE DES PIECES N UTILISER QUE CELLS DECRITES DANGEREUSES AN POINT DE VUE SECURITE ETANT LES PIECES REPAREES PAR UN ATTENTION DESCRIBED IN PARTS LIST ONLY CRITICAL FOR SAFETY USE ONES ARE SINCE THESE PARTS MARKED BY CAUTION D603 MTZJ6 8B D612 MTZJ12B D611 MTZJ12B D610 MTZJ12B D602 MTZJ8 2B W848 W817 W831 W832 L607 15uH S803Y S803X UNREG 12V GN...

Page 22: ...P SL C801 330P CH C420 0 1 100V MKT C403 0 22 100V MKT C405 0 1 F C437_2 0 47 200V FHS C417 1 50V YK C414 100 35V YK C433 470 35V YK C448 22 250V YK C447 470 16V ZL C418 2200 25V YK C445 10 50V YK C446 1 50V YK C812 2 2 250V YK R404 220 R816 330 R813 330 R809 3 9K R814 3 9K R446 4 7K 1 2W R411 1K 1 2W R412 4701 2W R437 1 2K R427 100 1 4W R433 470 1 2W R432 680 1 2W R410 680 1 2W R445 150K 1 2W R80...

Page 23: ...RMAL WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST NOTE THE DC VOLTAGE AT EACH PART WAS MEASURED C507 330 200V UP C521 100 160V YXF C531 1000 16V YK C505 0 22 275V PHE840 C519_1 180P CH C503 0 001 2KV B C502 0 001 2KV B C506 0 1 275V PHE840 C533_1 0 0022 250V KX C530_1 0 0022 250V KX C513 0 1 B C514 0 0015 2KV R C512 0 039 B C509 0 047 M C515 0 001 500V B C522 0 033 B C517_1 0 001 2KV R C516 0 ...

Page 24: ...2 47K R307 4 7K R306 4 7K R308 1K R309 1 8K R1013 150 1 2W R1012 150 1 2W OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME DANS LA NOMENCLATURE DES PIECES N UTILISER QUE CELLS DECRITES DANGEREUSES AN POINT DE VUE SECURITE ETANT LES PIECES REPAREES PAR UN ATTENTION DESCRIBED IN PARTS LIST ONLY CRITICAL FOR SAFETY USE ONES ARE SINCE THESE PARTS M...

Page 25: ...ED C718 10 16V KA C706 10 16V KA C717 10 16V KA C712 470 10V YK C724 0 0056 B C723 0 0056 B C701 10 16V KA C702 10 16V KA C703 10 16V KA C704 10 16V KA R733 1K R708 75 R734 1K R709 1K R711 1K R742 75 OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME W894 W851 W859 W839 W847 S804X FRONT_AUDIO_L FRONT_AUDIO_R REAR_AUDIO_R REAR_AUDIO_L GND P CON 9V...

Page 26: ...01 B C1508 0 01 B C1515 100P CH C1516 0 01 B C1517 0 01 B C1514 100 16V YK C1512 100 16V YK C1513 100 6 3V KA R1514 1K R1513 1K R1508 1K R1506 820 R1516 680 R1517 1K R1511 47 R1512 180 R1515 330 R1503 2 2K R1504 100 R1505 100 R1507 1K R1502 560 R1501 820 R1522 1K R1523 4 7K OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME W897 W803 W895 W878 W8...

Page 27: ...s were measured at the point of the corresponding balloon number in the schematic diagram CHROMA 1 1V 0 1µs div 6 0 5V 20µs div 200mV 20µs div 7 9 200mV 20µs div 0 5V 5ms div 10 8 20V 20µs div 11 1V 20µs div 12 1V 20µs div 1V 20µs div 13 DEFLECTION CRT 14 0 5V 5ms div 15 20V 20µs div 16 2V 20µs div ...

Page 28: ...alloon number in the schematic diagram 50V 20µs div 20 10V 5ms div 19 21 50V 20µs div 22 50V 20µs div 200V 20µs div 17 29 200mV 1ms div 10V 5ms div 18 30 200mV 1ms div 31 200mV 1ms div 0 5V 1ms div 32 0 5V 1ms div 33 SOUND 25 0 5V 1ms div 26 200mV 1ms div 200mV 1ms div 27 28 200mV 1ms div ...

Page 29: ...MECHANICAL EXPLODED VIEW 111 203 203 203 203 PCB110 CRT PCB 202 108 202 202 202 202 109 202 203 202 115 PCB010 MAIN PCB 112 206 206 204 205 205 102 204 104 105 107 106 103 101 203 203 110 ...

Page 30: ... SPRING EARTH 112 BZ710260 899HV3T000 HOLDER ANODE WIRE 115 AD301489 800WB0A001 FIBER WASHER 201 BZ710275 8121J50B54 SCREW TAPPING B0 GW20 5x28 202 BZ710035 8117540A64 SCREW TAPPING B0 TRUSS 4x16 203 BZ710031 8110630A04 SCREW TAP TITE P BRAZIER 3x10 204 BZ710239 8109I30A04 SCREW TAP TITE B WH7 3x10 205 BZ710019 8109630802 SCREW TAP TITE B BRAZIER 3x8 206 BZ710018 8107630804 SCREW TAP TITE S BRAZIE...

Page 31: ...18 BZ210176 E02LF3222M CE 2200 UF 25V C433 BZ110149 E02LT4471M CE 470 UF 35V C437 BZ110056 P447F2474J CMPP 0 47 UF 200V FHS C443 AD301435 P4N8FK752H CMPP 0 0075UF 1 5KV C447 BZ210178 E62FT2471M CE 470 UF 16V C448 BZ110204 E0ELFD220M CE 22 UF 250V C501 BZ110010 E02L03222M CE 2200 UF 25V or AD301436 E02LT3222M CE 2200 UF 25V C502 AD301438 C0PWB0713K CC 0 001 UF 2KV B C503 AD301438 C0PWB0713K CC 0 00...

Page 32: ...00070 D97U01201B DIODE ZENER MTZJ12B T 77 D611 AD300070 D97U01201B DIODE ZENER MTZJ12B T 77 D612 AD300070 D97U01201B DIODE ZENER MTZJ12B T 77 D613 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D615 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D616 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 ICS IC101 AD301322 I56F07072A IC OEC7072A IC199 AD301441 A3L701X015 IC S 24C04BDP LA IC302 BZ611034 I06DF624...

Page 33: ...I FIXED NVG6TLTAB102 VR402 BZ210237 V1K63Q4BTE VOLUME SEMI FIXED NVG6TLTAB473 VR502 BZ210108 V116313BTC VOLUME SEMI FIXED EVNCYAA03B13 or AD301487 V116213BT1 VOLUME SEMI FIXED EVN DCAA03B13 P C BOARD ASSEMBLIES PCB010 AD301447 A3L701X010 PCB ASS Y TMB540A PCB110 AD301448 A3L701X110 PCB ASS Y TCB399A MISCELLANEOUS B501 BZ310122 024HT03563 CORE BEADS W4BRH3 5X6X1 0X2 B504 BZ310129 024HT03564 CORE BE...

Page 34: ...TRANSMITTER RC EH030 TU001 AD301052 0145100059 TUNER VHF UHF ENV56DB6G3 V801 AD301452 098Y210435 CRT W DY A51LMV10X20N45 X602 BZ613004 100CT3R505 CRYSTAL HC 49 C RESISTOR RC CARBON RESISTOR CAPACITORS CC CERAMIC CAPACITOR CE ALUMI ELECTROLYTIC CAPACITOR CP POLYESTER CAPACITOR CPP POLYPROPYLENE CAPACITOR CPL PLASTIC CAPACITOR CMP METAL POLYESTER CAPACITOR CMPL METAL PLASTIC CAPACITOR CMPP METAL POL...

Page 35: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...

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