Toshiba 27A51, Service Manual

Page 1: ...SERVICE MANUAL COLOR TELEVISION FILE NO 050 200113 27A51 ...

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 125 W at AC 120 V 60 Hz Stand by at AC 4 W at AC 120 V 60 Hz Per Year ...

Page 4: ...lor Stream DVD DTV Yes 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 Yes Channel TV Cable Yes CH Label Yes Sleep Timer Yes Sound Mute Yes P in P Yes V chip Rating Yes G 8 OSD Language English French Spanish OSD Language Setting English G 9...

Page 5: ...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 Enter Yes Mute Yes Exit Yes MTS Audio Select Yes Fav Up Yes Fav Down Yes Set No Set No P in P Keys PIP Yes Swap Yes Locate Yes Still Yes 2 Tuner PIP CH Up No P in P Only PIP CH Down No Multi Brand Keys CH Up VCR Yes CH Down VCR Yes Pause Still ...

Page 6: ... FBT Leak Test Protect Yes Favorite CH Yes 1 Tuner P in P Yes 2 Tuner P in P No G 12 Accessories Owner s Manual Language English 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 Yes Dew AHC...

Page 7: ...t RCA x 2 S Input Yes Euro Scart No Color Stream RCA x 3 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 650 x 500 5 x 560 G 15 Weight Net Approx 35kg 77 1 lbs Gross Approx 38Kg 83 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 Material Double Br...

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: ...ds digit value 16 x tens digit value ones digit value NOTE FOR THE REPLACING OF MEMORY IC If a service repair is undertaken where it has been required to change the MEMORY IC the following steps should be taken to ensure correct data settings while making reference to TABLE 1 A9 C3 37 30 31 B3 27 17 2B 80 0 1 2 3 4 5 6 7 8 9 A B C D E F INI 0F 89 28 80 27 40 83 43 00 10 00 10 0E 61 63 64 26 00 F4 ...

Page 12: ...Using the adjustment control set the brightness and contrast to normal position Activate the adjustment mode display of Fig 1 1 and press the channel button 13 on the remote control to select R BIAS Using the VOL UP DOWN button on the remote control adjust the R BIAS Press the CH UP DOWN button on the remote control to select the G DRV B DRV G BIAS or B BIAS Using the VOL UP DOWN button on the rem...

Page 13: ...z Connect the AC voltmeter to AUDIO OUT JACK though stereo filter L 400Hz R 2KHz Activate the adjustment mode display of Fig 1 1 and press the channel button 31 on the remote control to select SEP1 Press the VOL UP DOWN button on the remote control until the output of L CH and R CH become minimum Press the CH UP button once the set to SEP2 mode Press the VOL UP DOWN button on the remote control un...

Page 14: ...the same step number as the AV Fig 2 2 Fig 2 3 White 100 RED Level 2 16 PIP HORIZONTAL POSITION 1 2 3 4 Receive the center cross signal from the Pattern Generator Using the remote control set the brightness and contrast to normal position Activate the adjustment mode display of Fig 1 1 and press the channel button 41 on the remote control to select H POSI Press the VOL UP DOWN button on the remote...

Page 15: ... control to select R Press the VOL UP DOWN button on the remote control until the waveform value becomes 0 9 0 04V Refer to Fig 2 8 Connect the oscilloscope to pin 11 of IC751 Press the CH UP button once to set to G mode Press the VOL UP DOWN button on the remote control until the waveform value becomes 0 9 0 04V Refer to Fig 2 8 Press the VOL DOWN button on the remote control to decrease the step...

Page 16: ...oke Refer to Fig 3 2 b R G B R G B Fig 3 2 a WEDGE WEDGE WEDGE WEDGE POSITION Fig 3 2 b R G B R G B Receive the crosshatch pattern from the color bar generator Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets Combine red blue magenta and green by adjusting the pair of 6 pole magnets UPWARD DOWNWARD SLANT RIGHT LEFT SLANT Adj...

Page 17: ...MAJOR COMPONENTS LOCATION GUIDE FOCUS VOLUME SCREEN VOLUME FB401 MAIN PCB VR502 CRT PCB J801 TP804 TP806 T501 TP002 J702 J701 J703 J704 J203 TP901 TP001 VR401 TU001 IC751 Solder side ...

Page 18: ... 32 31 25 22 20 27 29 9 6 3 5 2 4 1 7 14 15 13 8 10 C Y C L R V 4 1 9 12 3 5 T501 13 15 4 34 28 16 15 14 42 47 55 38 31 8 6 11 51 14 6 3 HV 1 7 9 F 10 S 1 5 6 7 R G B DY 7 F 10 L R V L R V V OUT FBP IN H OUT ABCL B OUT G OUT R OUT C IN CVBSLN T IN IF DET OUT IF IN IF IN 9 10 SCL SDA SCL SDA 43 44 YUV IN H OUT Q402 Q405 TV BLOCK DIAGRAM 52 51 50 49 ANALOG SW IC751 MM1284 6 1 14 7 52 51 50 8 11 16 3...

Page 19: ...02 C535_1 C421_1 C425_1 C413_1 C1003 L601 L205 C417 C418 TP901 TP001 C420_1 C004 C416 D513 CP702A CP702B D001 D108 R500 R503 L701 L202 D528 R535 C117 W824 W818 R517 R152 C402 R542 CF204 D511 R543 C502 C 50 3 D407 D405 D402 D411 D506 C528 D111 D110 D605 D515 R512 TP005 C541 C518 C516 C520 C427 C 52 2 R536 R519 R624 R001_1 R520 C508 C513 C519 C424 R735 C929 C921 Q402 W805 W823 W817 C423_1 W833 Q511 ...

Page 20: ... R747 C606 C607 R603 C638 C617 R607 C626 C632 C631 C623 R604 R636 Q603 C438 R435 R751 R719 R701 Q701 C723 R722 R721 R740 Q107 C738 R715 C747 C745 C746 R726 Q709 C744 C727 C726 C743 R713 C731 R724 R725 C706 C734 C750 R714 C728 C720 C737 R716 C730 C748 C722 C721 C712 C739 C708 C707 R752 C1001 C1002 R1009 Q1001 R1013 C1010 C1012 R1003 R1010 R619 R616 R617 R618 C602 C637 R215 R210 R201 C218 C221 R220 ...

Page 21: ... R1517 R1510 R1518 R1516 Q1504 C1506 C1507 C1509 C1508 C1512 Q1503 R1511 R1512 C1501 C1528 IC1501 C1513 R1513 Q1502 R1508 C1503 C1526 C1505 C1531 C1522 R1509 IC1801 IC1802 C1818 C1819 C1810 C1809 R1809 C1826 C1827 C1825 C1824 R1810 R1819 C1813 R1806 R1808 C1812 C1806 C1802 Q1804 Q1805 Q1803 R1826 R1827 R1825 C1821 C1816 R1822 Q1808 R1816 R1815 C1829 R1817 C1817 C1814 C1815 C1836 C1822 Q1807 Q1806 ...

Page 22: ... 20 21 22 23 24 25 26 27 28 29 3 30 31 32 33 34 35 36 37 38 39 4 40 41 42 43 44 45 46 47 48 49 5 50 51 52 6 7 8 9 TU001 ENV56D66G3 1 10 11 12 13 14 15 2 3 4 5 6 7 8 9 GND B Vout OS101 PIC 28143SY 2 1 2 3 IC103 PST600C RESET 1 2 3 SW102 SKHVBED010 CH DOWN SW104 SKHVBED010 VOL DOWN SW105 SKHVBED010 POWER SW101 SKHVBED010 CH UP SW103 SKHVBED010 VOL UP IC198 S 24C16AFJA TB 0 MEMORY 1 2 3 4 5 6 7 8 Q10...

Page 23: ... 01 B C229 100P CH C614 0 47 B C609 0 022 B W844 W823 W839 D201 MTZJ12B D604 MTZJ6 2B D603 MTZJ6 2B D602 MTZJ6 2B C214 10 16V KA C211 0 22 50V KA C213 100 10V YK C203 100 16V YK C615 100 10V YK C604 1 50V KA C640 1000 16V YK C616 47 16V YK C608 1 50V KA C935 4 7 50V KA C216 10 16V KA D605 11E1 EIC D611 1SS133 D613 1SS133 D614 1SS133 D608 1SS133 D612 1SS133 D615 1SS133 D601 1SS133 D607 1SS133 Q202 ...

Page 24: ...S AN POINT DE VUE SECURITE ETANT LES PIECES REPAREES PAR UN ATTENTION R416 5 6 1 2W R420 2 2 1 2W R417 33K R442 2 2K 1 4W R428 100 1 4W R407 3 9K 1 4W R415 820 R424 2 2K 1 2W R412 8 2K R406 4 7K 1 2W R403 330 R432 8 2K 1 2W R404 180 1 2W R437 1 1 2W R409 680 1 2W R421 680 1 2W R425 680 1 2W R429 680 1 2W R408 220 1 2W R419 1K R152 1K 1 4W R443 68K 1 2W R430 68K 1 2W R435 2 2K C431 0 001 500V B C40...

Page 25: ... R554 27K 1 2W R510 1K R503 3 3K 1 4W R506 2 2K 1 4W R502 10 1 2W R520 390 1 4W R519 1K 1 2W R511 22K R534 390 1 4W R535 10K1 4W R536 47K1 4W R537 56K1 4W R532 220 R533 100 R509 100K 1 2W R512 1K 1 4W R525 10K R524 2 2K C520 0 0022 500V B C508 470P 250V KH C519 470P 250V KH C506 0 1 275V PHE840 C505 0 1 275V PHE840 C554 0 0022 B C509 0 0056 B C524 0 001 B C512 0 001 B C502 0 001 2KV B C503 0 001 2...

Page 26: ...00K R323 1 5K R328 100 R326 100 R320 2 7K R319 4 7K R1013 10K R1009 10K R1004 330 R1003 330 C1006 220P B C330 0 022 B C333 0 47 B C331 0 022 B C332 0 47 B C334 0 033 B C1010 0 068 B C335 0 033 B C339 0 1 B C338 0 001 B C325 0 1 B C1012 0 068 B C336 100P CH C337 100P CH C1002 1 B C1001 1 B W831 W832 W809 W835 C1011 100 35V YK C326 47 16V YK C328 2 2 50V KA C303 47 16V YK C1009 1000 25V YK C329 2 2 ...

Page 27: ...1 4W R714 470 R734 10K 1 4W R705 75 1 4W R707 75 1 4W R708 75 1 4W R702 75 1 4W R713 68 R741 75 1 4W R723 470 1 4W R711 3 9K 1 4W R749 3 9K 1 4W R715 1K R717 470 1 4W R748 3 9K 1 4W R751 1K R752 1K R716 470 R735 75 1 4W R770 470 1 4W C734 0 01 B C723 150P CH C731 0 01 B C706 8P CH C740 0 0056 B C742 0 0056 B C750 1 B C748 0 1 B C727 0 0056 B C726 0 0056 B C744 0 0056 B C743 0 0056 B C720 33P CH C7...

Page 28: ...C767 47 6 3V KA C768 47 6 3V KA C754 10 16V KA C755 100 16V YK C761 100 16V YK C756 10 16V KA C751 10 16V KA D750 1SS133 Q754 2SC2412K BUFFER Q753 2SC2412K BUFFER Q752 2SC2412K BUFFER Q750 2SC2412K BUFFER L751 100uH L750 100uH PIP_AV1 PIP_AV2 PIP_SD SCL SDA PIP_AFT OSD_BLK OSD_B OSD_G OSD_R S_Y_VIDEO S_C_VIDEO TUNER_VIDEO REAR_VIDEO2 REAR_VIDEO1 P CON 9V GND_POWER P CON 5V PIP_PCON 8V V OUT1 AFC P...

Page 29: ...35 36 37 38 39 4 40 41 42 5 6 7 8 9 Q1808 2SA1037AK SYNC SEP L1804 10uH L1805 10uH 0305 L1802 470uH 0607 L1801 10uH L753 100uH 0305 C060 1000 6 3V YK IS NON POLAR ONE THE ALUMI ELECTROLYTIC CAPACITOR MARKED NP THE RESISTOR MARKED F IS FUSE RESISTOR NOTE IC1802 MM1563F 3 3V REG 1 2 3 4 5 6 7 CP001 IMSA 9130S 09L 1 2 3 4 5 6 7 8 9 CP051 IMSA 9130S 09L 1 2 3 4 5 6 7 8 9 R055 27 2W IC051 KIA7805API RE...

Page 30: ... ETANT LES PIECES REPAREES PAR UN ATTENTION R817 270 1 4W R819 270 1 4W R802 100 1 4W R815 220 1 4W R803 100 1 4W R821 270 1 4W R828 2 7K 1 4W R830 2 7K 1 4W R811 1 8K 1 4W R829 2 7K 1 4W R812 1 8K 1 4W R810 1 8K 1 4W R813 220 1 4W R801 100 1 4W R814 220 1 4W R809 100 1 4W C804 390P B C805 390P B C806 470P B C815 330P B C820 0 001 500V B C808 0 001 2KV B C813 0 0022 M C823 330P B W804 C809 2 2 250...

Page 31: ...1501 100 R1504 1K R1502 6 8K C1504 56P CH C1503 100P CH C1501 0 1 B C1508 27P CH C1507 0 01 B C1509 0 01 B C1512 0 01 B C1506 0 01 B C1516 100P CH C1514 0 01 B C1515 180P CH C1513 0 01 B C1510 0 01 B C1526 47P CH C1519 0 01 B C1521 0 01 B C1522 0 1 B C1531 0 1 B C1528 47P CH C1505 0 1 B W803 W807 W805 W802 W801 C1511 0 1 50V KA C1525 3 3 50V YK C1517 100 16V YK Q1504 2SC2412K BUFFER Q1501 2SC2412K...

Page 32: ...v 2 0V 50µs div 1 0V 5ms div 2 0V 50ns div 2 0V 50µs div 200mV 10µs div 500mV 10µs div 200mV 10µs div 7 8 15 1 2 3 4 5 6 9 10 11 12 13 14 1 0V 20µs div WAVEFORMS MICON TUNER CHROMA IF The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram NOTE ...

Page 33: ...ing waveforms were measured at the point of the corresponding balloon number in the schematic diagram NOTE WAVEFORMS 50V 20µs div 19 1 0V 2ms div 1 0V 2ms div 20mV 1ms div 22 23 25 20mV 1ms div 24 500mV 1ms div 26 200mV 20µs div 500mV 1ms div 100mV 10µs div 27 28 30 200mV 20µs div 29 AV DEFLECTION ...

Page 34: ... 1 0V 1ms div 1 0V 1ms div 32 33 1 0V 10µs div 34 50V 10µs div 37 50V 10µs div 50V 10µs div 38 39 The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram NOTE CRT ...

Page 35: ...204 204 108 J801 PCB110 CRT PCB 105 115 V801 115 115 115 L503 114 114 114 101 107 106 109 113 110 204 204 204 PCB170 VIDEO JACK PCB SP1001 202 112 104 203 205 205 203 203 PCB330 COMB PCB PCB010 MAIN PCB FB401 102 204 104 103 203 205 116 117 PCB250 P IN P PCB ...

Page 36: ... Y 114 AD300768 762WPA0009 HOLDER CRT WIRE 115 BZ710033 8111J50D05 SCREW TAPPING A GW22 5x35 116 AD300870 752WSA0184 SHIELD CASE IF 117 AD300869 752WSA0163 SHIELD COVER IF 201 BZ710036 8117540B04 SCREW TAPPING B0 TRUSS 4x20 202 AD300769 8117330A04 SCREW TAPPING B0 FLAT 3x10 203 BZ710019 8109630802 SCREW TAP TITE B BRAZIER 3x8 204 BZ710031 8110630A04 SCREW TAP TITE P BRAZIER 3x10 205 BZ710239 8109I...

Page 37: ...D300067 E02LF4102M CE 1000 UF 35V C502 AD300078 C0JBB0713K CC 0 001 UF 2KV B C503 AD300078 C0JBB0713K CC 0 001 UF 2KV B C504 BZ110074 E50HU5010M CE 1 UF 50V C505 BZ110145 P2472B104M CMP 0 1 UF 275V PHE840 C506 BZ110145 P2472B104M CMP 0 1 UF 275V PHE840 C507 BZ110012 E51CGC471M CE 470 UF 200V C508 AD300726 CB3LB0MQ2K CC 470 PF 250V C510 BZ110018 E5EZT4101M CE 100 UF 35V C513 AD300726 CB3LB0MQ2K CC ...

Page 38: ...7 D604 BZ410066 D97U06R21B DIODE ZENER MTZJ6 2B T 77 D605 BZ410043 D2WT011E10 DIODE SILICON 11E1 EIC D606 AD300850 D97X05R61B DIODE ZENER MTZJ5 6B T 72 D607 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D608 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D611 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D612 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D613 BZ410006 D1VT001330 DIODE SILICON 1SS133T 7...

Page 39: ...STOR SILICON 2SC2621 D E RAC Q803 BZ510027 TC3Q026210 TRANSISTOR SILICON 2SC2621 D E RAC Q810 AD300442 TCYT1740S0 TRANSISTOR SILICON 2SC1740SP R S TP Q811 AD300442 TCYT1740S0 TRANSISTOR SILICON 2SC1740SP R S TP Q812 AD300442 TCYT1740S0 TRANSISTOR SILICON 2SC1740SP R S TP Q1001 BZ510068 TNAAJ05003 COMPOUND TRANSISTOR KRC111RTK Q1501 BZ510002 T8YJ2412K0 TRANSISTOR SILICON 2SC2412KT146 R S Q1502 BZ51...

Page 40: ...FCT4R5YS5A CF202 BZ613022 1022T45R74 FILTER SAW SAF45MFG220Z CF203 AD300686 1012T4R519 FILTER CERAMIC TRAP TPSRA4M50C00 A0 CF204 AD300513 1012T04702 FILTER CERAMIC TRAP MKT47 3MC110P TF CP001 AD300862 069J190048 CONNECTOR PCB SIDE IMSA 9130S 09L CP051 AD300862 069J190048 CONNECTOR PCB SIDE IMSA 9130S 09L CP101 BZ614238 0697260650 CONNECTOR PCB SIDE TKC M06X A1 CP401 AD300749 069W340018 CONNECTOR P...

Page 41: ...C8004T4 X601 BZ613004 100CT3R505 CRYSTAL HC 49 C X1801 AD300866 100DT01405 CRYSTAL AT 49 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 POLYPROPYLENE CAPACITOR ...

Page 42: ...TOSHIBA AMERICA CONSUMER PRODUCTS INC HEAD OFFICE 82 TOTOWA ROAD WAYNE NEW JERSEY 07470 U S A TOSHIBA HAWAII INC HEAD OFFICE 327 KAMAKEE STREET HONOLULU HAWAII 96814 U S A ...