Related Manuals for Toshiba 20AF44
Summary of Contents for Toshiba 20AF44
-
Page 1: Service Manual
FILE NO. 050-200405 SERVICE MANUAL COLOR TELEVISION 20AF44 DOCUMENT CREATED IN JAPAN, Mar., 2004... -
Page 2: Servicing Notices On Checking
SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 6. AVOID AN X-RAY As for the places which need special attentions, Safety is secured against an X-ray by consider- they are indicated with the labels or seals on the ing about the cathode-ray tube and the high cabinet, chassis and parts. -
Page 3: Table Of Contents
TABLE OF CONTENTS SERVICING NOTICES ON CHECKING ..................A1-1 A1-1 HOW TO ORDER PARTS ......................IMPORTANT ..........................A1-1 TABLE OF CONTENTS ......................A2-1 A3-1~A3-5 GENERAL SPECIFICATIONS ....................DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF ANODE CAP ....................B1-1 2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ..........B2-1, B2-2 SERVICE MODE LIST ........................ -
Page 4: General Specifications
GENERAL SPECIFICATIONS CRT Size / Visual Size 20 inch / 508mmV System CRT Type Flat Deflection degree 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) 2.0+2.0 W NTSC3.58+4.43 /PAL60Hz... - Page 5 GENERAL SPECIFICATIONS On Screen Menu Display Menu Type Icon Picture Contrast Brightness Color Tint Sharpness Sound Bass Treble Balance BBE On/Off Stable Sound On/Off Surround On/Off Set Up TV/CATV Auto CH Memory Add/ Delete Option Language CH Label Favorite CH V-Chip Lock On/Off Timer...
- Page 6 GENERAL SPECIFICATIONS G-10 Remote Unit RC-GW Control Glow in Dark Remocon Format Toshiba Custom Code TV:40-BF h Power Source Voltage(D.C) UM size x pcs UM-4 x 2 pcs Total Keys Keys Keys Power CH Up CH Down Volume Up Volume Down...
- Page 7 Features Auto Degauss Auto Shut Off Canal+ CATV Anti-theft Rental Memory(Last CH) Memory(Last Volume) V-Chip Type USA,Toshiba Type Auto Search CH Allocation Just Clock Function CH Label VM Circuit Full OSD Premiere Comb Filter Lines Auto CH Memory Hotel Lock...
- Page 8 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 Yes(RED) Stand-by On Timer Terminals Front Video Input = VIDEO3 Audio Input = VIDEO3 RCA x 2 Other Terminal...
-
Page 9: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction to 1. REMOVAL OF ANODE CAP remove the other. Read the following NOTED items before starting work. NOTE After turning the power off there might still be a potential Take care not to damage the Rubber Cap. -
Page 10: Removal And Installation Of Flat Package Ic
DISASSEMBLY INSTRUCTIONS When IC starts moving back and forth easily after REMOVAL AND INSTALLATION OF desoldering completely, pickup the corner of the IC using a FLAT PACKAGE IC tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 2-3.) REMOVAL NOTE Put the Masking Tape (cotton tape) around the Flat... - Page 11 DISASSEMBLY INSTRUCTIONS INSTALLATION 4. When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thin- Take care of the polarity of new IC and then install the new tip Soldering Iron. (Refer to Fig. 2-8.) IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.
-
Page 12: Service Mode List
SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter the Service Mode, press both set key and remote control key for more than 1 second. Set Key Remocon Key Operations Releasing of V-CHIP PASSWORD. -
Page 13: Electrical Adjustments
ELECTRICAL ADJUSTMENTS BEFORE MAKING ELECTRICAL 2. BASIC ADJUSTMENTS ADJUSTMENTS 2-1: CONSTANT VOLTAGE Read and perform these adjustments when repairing the Place the set with Aging Test for more than 5 minutes. circuits or replacing electrical parts or PCB assemblies. Set condition is AV MODE without signal. Using the remote control, set the brightness and contrast CAUTION to normal position. - Page 14 ELECTRICAL ADJUSTMENTS 2-7: VERTICAL SIZE 2-10: TINT/COLOR CENT Receive the monoscope pattern. Receive the color bar pattern. (RF Input) Connect the oscilloscope to TP806. Using the remote control, set the brightness and contrast to normal position. Using the remote control, set the brightness, contrast, color and tint to normal position.
- Page 15 ELECTRICAL ADJUSTMENTS 2-11: CONTRAST MAX MANUAL 2-13: LEVEL Activate the adjustment mode display of Fig. 1-1 and Receive the monoscope pattern (70dB). press the channel button (18) on the remote control to Connect the AC voltmeter to pin 6 of CP101. Activate the adjustment mode display of Fig.
-
Page 16: Purity And Convergence
ELECTRICAL ADJUSTMENTS 3-3: STATIC CONVERGENCE 3. PURITY AND 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 17 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB CP804 CP803 CD852 CP852 J801 CP852B VM COIL PCB CP802B CP801B CP851B CD801 CD851 CD802 CP801A J702 CP101 J708 J704 J703 J701 FB401 TP003 VR401 W003 VR502 CP851A CP802A CD1001 SPEAKER...
-
Page 18: Block Diagram
BLOCK DIAGRAM A/V OUT J708 CHROMA IC COMB FILTER IC IC601 M61283FP R70T IC1501 LA76605M-TLM Q852, Q583 Q854 Q855~Q859 BUFFER BUFFER Q610 Q613 VM COIL FB401 Y IN VIDEO LINE OUT DELAYDE Y OUT SVM OFF Q603, Q614, Q605 J801 Q803, Q812 VIDEO SW(Y) IC BLUE AMP... -
Page 19: Printed Circuit Boards Main
PRINTED CIRCUIT BOARDS MAIN (INSERTED PARTS) SOLDER SIDE C427 CD801A B401 CP101 CP801A C426 J702 J701 J704 J708 J703 D411 D701 C413_1 D407 D405 D704 D705 D703 W861 W006 D608 W134 D702 W062 W061 W060 W132 W850 R710 W131 W813 W819 W057 W058... - Page 20 PRINTED CIRCUIT BOARDS MAIN (CHIP MOUNTED PARTS) SOLDER SIDE Q101 R109 IC199_1 R724 R101 C128 C719 C720 R112 R113 R907 C312 C303 C102 C104 IC302 IC902 C115 C911 C301 R136 IC101 C323 R906 C917 R125 R128 Q902 IC301 R137 R150 C106 Q901 C913...
-
Page 21: Crt/Vm Coil
PRINTED CIRCUIT BOARDS CRT/VM COIL SOLDER SIDE TP806 W804 D809 R808 D807 Q810 TP804 D805 W808 R804 D804 R809 R812 R806 TP805 D808 R820 W807 Q812 W007 Q811 C805 Q853 R819 R814 Q852 D852 R859 W806 C857 Q854 C853 C854 D855 R872 R877... -
Page 22: Micon
MICON SCHEMATIC DIAGRAM ACCESSORY (MAIN PCB) BT001 R03(AB)E_2P_G OS101 TM101 RPM7138-WH5 BT002 R25-1943 R03(AB)E_2P_G Vout LED SW Q101 R109 CP101 173979-7 KTC3875S_Y_RTK I2C_SCL I2C_SDA R101 I2C_OFF C145 R103 R106 AUDIO L 220P AUDIO R 2.7K R130 R150 CLAMP SW Q103 47K 1/4W KTC3875S_Y_RTK FROM/TO CHROMA... - Page 23 CHROMA SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO AV VIDEO_IN2 V_IN[YUV] R616 VIDEO_IN1 120 1/2W AT+5V REG U_IN[YUV] R617 Q607 Y_IN[YUV] KTC3203_Y VIDEO_IN3 VIDEO_OUT R603 P.CON+5V 330 1/2W FROM/TO COMB FILTER FROM/TO MICON C_V_OUT_SW P.CON+5V PROTECT Y_V_OUT_SW P.CON+5V REG C641 VIDEO_OUT Q606 C IN(Y/C) Y SW OUT SW_Y_OUT...
- Page 24 DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO DY V.OUTPUT IC IC401 LA78040 CP401 V801 B06B-DVS THERMAL PROTECTION A51LVV896X07(O) FROM MICON PUMP UP L402_1 25.0 12.0 25.0 R407 ELH5L4113 1.2K R439 1K 1W TO CRT/SVM C425 CD803 (CP805) 0.001 CP83035A R414 R417 27K +-1% FROM/TO CHROMA V_OUT...
-
Page 25: Power
POWER SCHEMATIC DIAGRAM (MAIN PCB) D516 RELAY DRIVE Q504 10.9 1SS133 KTC3198 R515 10K 1/4W RY501 ALKS321 TO SOUND R517_1 D505 W806 SOUND+B 30DF6-FC 0.22 3W R541_1 DEGAUSS COIL R501 L503 P.CON+12V CP502 8R200024 1 7W 0.22 1W A1561WV2-2P SOUND_GND D517 CP507 COIL,LINE FILTER... -
Page 26: Sound
SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM TUNER/STEREO R302 SW_AUDIO_L R301 2.7K 1/4W SW_AUDIO_R 2.7K 1/4W C309 0.039 L IN L ONT R305 C323 R307 C325 0.0033 0.033 Tone Volume 2.2K SURR Balance Control R313 Control /MUTE 1K 1/4W MODE control R IN Vref R OUT... -
Page 27: Tuner/Stereo
TUNER/STEREO SCHEMATIC DIAGRAM (MAIN PCB) TU001 115-V-K015AR_B FROM/TO CHROMA TUNER+5V NC NC TUNER_VIDEO W812 P.CON+8V[B] P.CON+5V FROM POWER R001 P.CON+B 68K 1/2W R002 68K 1/2W TO MICON FROM/TO MICON J_AUDIO_OUT_L C901 BUFFER Q901 KTA1504S_Y_RTK J_AUDIO_OUT_R C902 BUFFER Q902 KTA1504S_Y_RTK TO SOUND L901 SW_AUDIO_L 100uH 0305... - Page 28 AV SCHEMATIC DIAGRAM (MAIN PCB) YUV_IN(REAR) J704 FROM/TO CHROMA MSP-213V1-652_NI V_IN[YUV] U_IN[YUV] Y_IN[YUV] VIDEO_OUT VIDEO_IN2 A/V_OUT(REAR) VIDEO_IN1 J708 MSP-213V2-432_NI VIDEO_IN3 C711 R708 C707 R704 R702 C728 R721 22 1/4W MUTE R703 Q711 R711 KTC3875S_Y_RTK 2.2K C710 MUTE BUFFER Q712 R710 Q709 KANP KTC3875S_Y_RTK...
-
Page 29: Comb/Filter
COMB/FILTER SCHEMATIC DIAGRAM (MAIN PCB) L1511 15uH 0305 BUFFER Q1508 KTC3875S_Y_RTK C1535 L1505 FROM AV 15uH 0305 S_VIDEO_IN[C] S_VIDEO_IN[Y] R1512 BUFFER Q1503 C1513 KTC3875S_Y_RTK 0.1 B VIDEO SW(Y) IC C1519 FROM MICON IC1502 MM1501XNRE Vin1 Y/C_SW V.OUT Vin2 VIDEO SW(C) IC IC1503 MM1501XNRE FROM/TO CHROMA... - Page 30 CRT/SVM SCHEMATIC DIAGRAM (CRT PCB) TP804 PCB110 CRT BLOCK TCA391 R828 RED AMP Q801 123.5 2.7K 1/4W D804 D805 D806 R813 KTC4217 1SS133 1SS133 1SS133 220 1/4W D801 FROM CHROMA 1SS133 CP802B (CP802A) R855 A2001WV2-7P RED AMP Q810 P.CON+8V W808 1/2W W820 KTC3199_Y...
- Page 31 WAVEFORMS MICON SOUND 100µs 1.0V 5.0V 50mV 5µs 1.0V 200mV 20µs 50µs 100mV 1.0V 50µs 20µs 2.0V 1.0V 100mV DEFLECTION 20µs 200mV 200V 5.0V NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
-
Page 32: Crt/Svm
WAVEFORMS 20µs 5.0V 20µs 200mV 20µs 200mV CRT/SVM 20µs 20µs NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. -
Page 33: Mechanical Exploded Views
MECHANICAL EXPLODED VIEW 102B 102A 102B PCB110 (CRT PCB ASS'Y) PCB060 (VM COIL PCB ASS'Y) PCB010 (MAIN PCB ASS'Y) 101I 101F 101G 101I 101E 101H 101G 101C 101B 101D 101A... - Page 34 MECHANICAL EXPLODED VIEW (PACKING DIAGRAM) 122, 123, 124, 125, TM101...
-
Page 35: Mechanical Replacement Parts List
MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description AE003196 A3M7110720 CABINET,FRONT ASSY 101A AE003197 701WPJC568 CABINET,FRONT 101B AD302006 711WPA0184 PLATE,FRONT 101C AD302007 713WPA0263 GLASS,LED 101D AD302008 7235490036 BADGE,BRAND 101E AD302009 735WPA0728 STOPPER,BUTTON 1 101F AD302010 735WPA0732 STOPPER,BUTTON2 101G AE003198 735WPBB006... -
Page 36: Electrical Replacement Parts List
ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS ! R402 BZ210041 R635U2680J R,FUSE 68 OHM 1/2W ! R410 AD301344 R3X18A151J R,METAL OXIDE 150 OHM 2W ! R416 AD301593 R002T23R3J 3.3 OHM 1/2W ! R420 AD301345 R002T22R7J 2.7 OHM 1/2W ! R426 BZ210030... - Page 37 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description DIODES D414 BZ410043 D2WT011E10 DIODE,SILICON 11E1-EIC D415 BZ410043 D2WT011E10 DIODE,SILICON 11E1-EIC ! D501 BZ410062 D2WTRM11C0 DIODE,SILICON RM11C-EIC ! D502 BZ410062 D2WTRM11C0 DIODE,SILICON RM11C-EIC ! D503 BZ410062 D2WTRM11C0 DIODE,SILICON RM11C-EIC ! D504 BZ410062 D2WTRM11C0...
- Page 38 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description TRANSISTORS Q103 BZ510109 TCAA3875SY TRANSISTOR,SILICON KTC3875S_Y_RTK ! Q402 BZ510097 TCAT03227Y TRANSISTOR,SILICON KTC3227_Y-AT ! Q405 BZ510040 TDUU024990 TRANSISTOR,SILICON 2SD2499(LB0EC1) ! Q502 BZ510098 T220033260 2SK3326(2) ! Q503 BZ510005 TA3T1371A0 TRANSISTOR,SILICON 2SA1371(D,E)-AE Q504 BZ510069 TCATC31980...
- Page 39 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description JACKS J703 AD301038 060J431019 RCA JACK MSP-213V2-432 PBSN J704 AD301037 060J411024 RCA JACK MSP-213V1-652 PBSN J705 AD300110 060G401047 RCA JACK HTJ-032-03AY J706 AD300111 060G401046 RCA JACK HTJ-032-03AW J707 AD300112 060G401039 RCA JACK HTJ-032-03AR...
- Page 40 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description JACKS ! V801 AD301053 098W210437 CRT W/DY A51LVV896X07(O) X101 AD302002 100CT8R005 CRYSTAL HC-49/U-S X602 AD302003 100CT3R505 CRYSTAL HC-49/C RESISTOR RC....CARBON RESISTOR CAPACITORS CC....CERAMIC CAPACITOR CE....ALUMI ELECTROLYTIC CAPACITOR CP....
- Page 41 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...