Toshiba 21S04B Service Manual
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Toshiba 21S04B Service Manual

Toshiba 21S04B Service Manual

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FILE NO. 050-200003
SERVICE MANUAL
COLOUR TELEVISION
21S04B, 21S04D
21S04F, 21S04I
21S04N
PRINTED IN U. K

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  • Page 1 FILE NO. 050-200003 SERVICE MANUAL COLOUR TELEVISION 21S04B, 21S04D 21S04F, 21S04I 21S04N PRINTED IN U. K...

  • Page 2: Safety Precautions

    Precautions 1. Precautions Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazards such as electrical shock and X-rays. 1-1 Safety Precautions 1. Be sure that all of the built-in protective devices are replaced. Restore any missing (READING SHOULD NOT BE ABOVE protective shields.
  • Page 3 Precautions 1-1 Safety Precautions (Continued) 15. Observe the original lead dress, especially 9. High voltage is maintained within specified near the following areas: Antenna wiring, limits by close-tolerance, safety-related sharp edges, and especially the AC and high components and adjustments. If the high voltage power supplies.

  • Page 4: Servicing Precautions

    Precautions 1-2 Servicing Precautions Warning1: First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a conflict between the servicing and safety precautions, always follow the safety precautions. Warning2: An electrolytic capacitor installed with the wrong polarity might explode. 5.

  • Page 5: Precautions For Electrostatically Sensitive Devices (Esds)

    Precautions 1-3 Precautions for Electrostatically Sensitive Devices (ESDs) 1. Some semiconductor (“solid state”) devices 5. Use only a grounded-tip soldering iron when are easily damaged by static electricity. Such soldering or unsoldering ESDs. components are called Electrostatically Sensitive Devices (ESDs); examples include 6.

  • Page 6: Reference Information

    Reference Information 2. Reference Information 2-1 Tables of Abbreviations and Acronyms Table 2-1 Abbreviations Ampere Megavolt Ampere-hour Megawatt Å Angstrom MΩ Megohm Decibel Meter Decibel Referenced to One µA Microampere Milliwatt µF Microfarad °C Degree Celsius µH Microhenry °F Degree Fahrenheit µm Micrometer °K...
  • Page 7 Reference Information Table 2-2 Table of Acronyms Automatic Brightness Limiter Input/output Alternating Current Left Automatic Chroma Control Audio Frequency Light Emitting Diode Automatic Frequency Control Low Frequency Automatic Fine Tuning MOSFET Metal-Oxide-Semiconductor-Field-Effect-Tr Automatic Gain Control Multi-channel Television Sound Amplitude Modulation National Association of Broadcasters ANSI American National Standards Institute...
  • Page 8 Reference Information 2-2 IC Line Up Table 2 - 3 IC Line - Up BOARD LOC. NO SPEC REMARK DESCRIPTION Refer to Table 2-3-1 Video Processor IC201S VDP3112B Refer to Table 2-3-2 IC601 MSP3411G Multistandard Sound Processor IC901 SDA555X MICOM, TTX(MTP) KS24L161 EEPROM IC902...
  • Page 9 Reference Information Table 2 - 3 IC Line - Up BOARD LOC. NO SPEC DESCRIPTION REMARK T801S Trans Switching AA26-00046A Refer to Table 2-3-6 MAIN T444S Trans FBT FUJ-29B001 Refer to Table 2-3-7 IC501 TDA6111Q Video Output AMP R.G.B Drive IC502 IC503 QF04...
  • Page 10 Reference Information Table 2-3-1 VIDEO IC (IC201S) REMARK SPEC FUNCTION 50Hz Basic VDP3108B VDP3112B 50Hz, 2H Comb Filtr VDP3120B 50Hz, 2H Comb Filter, Horizontal Scaler 50Hz, 2H Comb Filter, DVD Input VDP3130Y 100Hz VDP3140D Table 2-3-2 SOUND IC (IC601) REMARK FUNCTION SPEC Multistandard, A2 Stereo...
  • Page 11 Reference Information Table 2-3-6 TRANS REMARK SPEC FUNCTION FUJ-29B001 29” 21” FUH-29A001B Table 2-3-7 TRANS FLYBACK (FBT) FUNCTION REMARK SPEC AA26-00046A 29” AA26-00044C 21”...

  • Page 12: Specifications

    Specifications 3. Specifications Television PAL/SECAM-B/G,D/K,L,I, NTSC-M System Antena Input 75ohms, Coaxial Cable Consumption 100W (Applied When 29” Flat) 220V Only Power Requirements Not Present R815 Free Voltage Frequency 50/60Hz 29 Inch 15W x 2CH Output 21 Inch 10W x 2CH 5W x 2CH Sound Vitual Dolby...

  • Page 13: Alignment And Adjustments

    Alignment and Adjustments 4. Alignment and Adjustments 4-1 General Alignment Instructions 1. Usually, a color TV-VCR needs only slight 5. Avoid overload. Excessive signal from a touch-up adjustment upon installation. Check sweep generator might overload the front-end the basic characteristics such as height, of the TV.

  • Page 14: Dynamic Focus Adjustment

    3rd horizontal line for maximum clarity.( ) SCREEN 8. Repeat 4-7, if necessary. <FBT FOCUS PACK> 4-5 SCREEN Adjustment 1. Input Toshiba Pattern 2. Enter “Service Mode”.(Refer to “Service Mode”) 3. Select “G2-Adjust”. 4. Set the values as below. 29 Inch 21 Inch...
  • Page 15 (The incorrect SCREEN Voltage may result that “MRCR G B” and “MRWDG” should be red) Note 1. When you do not have Toshiba Pattern, follow this method. 1. Set the TV on the condition that AV mode no signal(black) 2. Enter the “Menu” and set the mode to blue screen off.

  • Page 16: White Balance Adjustment

    5. Power on the TV. 4-7 White Balance Adjustment n Equipment : Color-Analyzer (CA-100) n Input Signal : Pattern signal (Toshiba pattern) 1. Select STANDARD from the menu. 2. Input an 100% White pattern. 3. Enter the “Service Mode”. (Refer to “4-8 Service Mode”) 4.

  • Page 17: Factory Adjustment

    Alignment and Adjustments 4-8 Factory Adjustment 4-8-1 Service Mode 1. To enter the “Service Mode”, Press the remote-control keys in this sequence : - If you do not have Factory remote-control DISPLAY ( PICTURE OFF PICTURE ON MENU MUTE - If you have Factory remote-control PICTURE ON DISPLAY ( FACTORY...

  • Page 18: Memory Data

    Alignment and Adjustments 4-8-2 Memory Data 4-8-2(A) DEFLECTION (GEOMETRIC ADJUSTMENT VALUE) Fixed Value Initial Range Function Remark Value V Shift Adjust Vertical Picture Position -128 ~127 Adjust Vertical Picture Size V Amp -128 ~127 Adjust Vertical Slope Correction V Slope -128 ~127 -128 ~127 Not to be adjusted...
  • Page 19 Alignment and Adjustments 4-8-2(B) SCREEN CHANGE (I2C BUS GEOMETRIC ADJUSTMENT) V Shift V Amp V Slope V SC H EW H Trapizium H Symmetry H Parabola H Corner H Shift...
  • Page 20 Alignment and Adjustments 4-8-2(C) VIDEO ADJUST 1 Fixed Value Initial Range Function Remark Value Red Cufoff Adjust Red Cutoff Level 0 ~255 Adjust Green Cutoff Level Low Light 0 ~255 Green Cutoff Adjust Blue Cutoff Level 0 ~255 Blue Cutoff Adjust Red Output Gain Red Drive 0 ~255...
  • Page 21 Alignment and Adjustments 4-8-2(D) VIDEO 2 ADJUST Fixed Value Initial Range Function Remark Value B stretch-BTHR Black Stretch Threshold 0 ~ 55 0 ~ 15 Black Stretch Tilt Position B stretch-BTLT 0 ~ 31 Black Stretch Amount B stretch-BAM Luma Peaking Filter Coring Coring 10 ~ 31 OSD/TTX RGB Bright...
  • Page 22 Alignment and Adjustments 4-8-2(E) OPTION Fixed Value Initial Function Remark Value Language OSD Language Arab, Iran, Lybya, CIS Depending on IC601 Sound A2/NICAM, V-Dolby, Mono, L-Stereo Refer to Note 5 4:3, Wide, Q(12.8:9), 4:3-16:9, Q-16:9 S:S-VHS, D:DVD 2Scart, 2Scart+S, 1RCA, 2RCA, 2RCA+S, AV Mode 2RCA+D, 2RCA+S+D, 1Scart X-Ray...
  • Page 23 Alignment and Adjustments Note 6. Option. CS29A5MT9X/BWT CS29A5WT8X/UMG CS29A6PF8X/HAC CS29A6WT8X/BWT Description Initial Vaue Initial Vaue Initial Vaue Initial Vaue Arab Arab LANGUAGE V-Dolby A2/Nicam A2/Nicam V-Dolby SOUND 2 RCA + S 2 SCART + S 2 SCART + S AV MODE 2 RCA + S X-RAY TILT CONTROL...

  • Page 24: Pin Layout

    Alignment and Adjustments 4-9 MICOM 4-9-1 Pin Layout Write Protect Tilt EEPROM SDA N.C. EEPROM SCL Power Bus-Stop Sound Mute Main SDA N.C. Main SCL N.C. Sound Reset PX. Y Video Reset PX. Y VDD 2.5V VDD 3.3V VDD 3.3V VDD 2.5V CVBS Input CORE...
  • Page 25 Alignment and Adjustments 4-9-2 Pin Assignment Specification PIN NO FUNCTION IN/OUT ASSIGN ACTIVE H/L DESCRIPTION Write Protect EEPROM Write Protection ROM SDA EEPROM Serial Data Line ROM SCL EEPROM Serial Clock Line Bus Stop Disable Micom IIC Peripheral IC Serial Data Line Main SDA Main SCL Peripheral IC Serial Clock Line...
  • Page 26 Alignment and Adjustments 4-9-2 Pin Assignment Specification (Continued) PIN NO FUNCTION ASSIGN IN/OUT ACTIVE H/L DESCRIPTION Relay Activate Degausssing Coil Not Used (Programmed Gound Level) N.C. Analog Ground Not Used (Programmed Gound Level) VDD 3.3V Not Used (Programmed Gound Level) N.C.
  • Page 27 Plug in Power Cord Check LED lamp Check Abnormal Check Normal IC901 MICOM MICOM IIC #5, #6 Input Voltage Normal Abnormal Check and Replace the MICOM Check Level Shifter Q909, Q910 Check Check Normal Normal Abnormal Output(If 2N7000 Output has the DC IC903 3.3V Regulator Check and Replace the MICOM Power #59...
  • Page 28 No Picture, but sound is in normal operation Turn the VR of FBT, higher screen voltage and Check the Deflection Normal Abnormal is in Normal Operation (If the deflection is in operation, flyback signal is appeared) Check Normal Abnormal Normal Abnormal Check CRT PCB RK, BK, GK...
  • Page 29 Troubleshooting 5-3 No Sound No Sound, but Picture is in normal operation Abnormal Normal Check the CN602 Connection and Signal Check the Speaker Normal Abnormal Check Wire Connection 14V Line Check Check IC602 #7 Abnormal FA803S (If the pin is in low state, Sound is mute) Normal Check...
  • Page 30 Exploded View & Parts List 6. Exploded View & Parts List 6-1 21S04B Code No. Replacement No. Description;Specification Q’ty Remark AZ760051 HA91-00228B ASSY-CABINET,FRONT;-,21S04,-,-,- AZ760043 HA64-00570A CABINET-FRONT;-,21S03,-,HIPS,HB,LIGHT-GRAY,- AZ760046 AA64-70110B BADGE-BRAND;AL,-,SILVER,L46,TOSHIBA,-,- AZ760042 HA64-00424A KNOB-POWER;-,21S03,MA L/GRAY,ABS,HB,GRAY AZ760018 AA61-60003J SPRING-CS;-,SUS304,0.5,OD6,H12,N7,-,-,- DELETE ITEM AZ760044 AA61-40113A STOPPER-PCB;501H,HIPS,NTR,HB,-,-...

  • Page 31: Electric Parts List

    Electric Parts List 7. Electric Parts List 7-1 21S04B LOC NO PARTS NO Description & Specification REPLACEMENT NO Q’ty REMARKS ASSY-PCB,MAIN AZ664126 ASSY-PCB,MAIN(OPT);CW21S04F,TSB,KS3A/C HA94-100716 D201 AZ462001 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP 0401-000005 D202 AZ462001 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP 0401-000005 D207 AZ462001 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP 0401-000005 D208 AZ462001 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP 0401-000005...
  • Page 32 Electric Parts List LOC NO PARTS NO Description & Specification REPLACEMENT NO Q’ty REMARKS D204 AZ462033 DIODE-SCHOTTKY;RB441Q,10V,100mA,DO-34,TP 0404-000156 D205 AZ462033 DIODE-SCHOTTKY;RB441Q,10V,100mA,DO-34,TP 0404-000156 D206 AZ462033 DIODE-SCHOTTKY;RB441Q,10V,100mA,DO-34,TP 0404-000156 D901 AZ462033 DIODE-SCHOTTKY;RB441Q,10V,100mA,DO-34,TP 0404-000156 D902 AZ462033 DIODE-SCHOTTKY;RB441Q,10V,100mA,DO-34,TP 0404-000156 D903 AZ462033 DIODE-SCHOTTKY;RB441Q,10V,100mA,DO-34,TP 0404-000156 D904 AZ462033 DIODE-SCHOTTKY;RB441Q,10V,100mA,DO-34,TP 0404-000156 D905...
  • Page 33 Electric Parts List LOC NO PARTS NO Description & Specification REPLACEMENT NO Q’ty REMARKS R612 AZ261101 R-CARBON;100OHM,5%,1/8W,AA,TP,1.8X3.2MM 2001-000281 R613 AZ261101 R-CARBON;100OHM,5%,1/8W,AA,TP,1.8X3.2MM 2001-000281 R627 AZ261101 R-CARBON;100OHM,5%,1/8W,AA,TP,1.8X3.2MM 2001-000281 R628 AZ261101 R-CARBON;100OHM,5%,1/8W,AA,TP,1.8X3.2MM 2001-000281 R706 AZ261101 R-CARBON;100OHM,5%,1/8W,AA,TP,1.8X3.2MM 2001-000281 R707 AZ261101 R-CARBON;100OHM,5%,1/8W,AA,TP,1.8X3.2MM 2001-000281 R708 AZ261101 R-CARBON;100OHM,5%,1/8W,AA,TP,1.8X3.2MM 2001-000281 R723...
  • Page 34 Electric Parts List LOC NO PARTS NO Description & Specification REPLACEMENT NO Q’ty REMARKS R904 AZ261472 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M 2001-000734 R905 AZ261472 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M 2001-000734 R906 AZ261472 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M 2001-000734 R908 AZ261472 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M 2001-000734 R921 AZ261472 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M 2001-000734 R927 AZ261472 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M 2001-000734 R928 AZ261472 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M 2001-000734 R937...
  • Page 35 Electric Parts List LOC NO PARTS NO Description & Specification REPLACEMENT NO Q’ty REMARKS R835 AZ263073 R-METAL OXIDE(S);68Kohm,5%,2W,AG,TP,3.9x12mm 2003-002181 R836 AZ263073 R-METAL OXIDE(S);68Kohm,5%,2W,AG,TP,3.9x12mm 2003-002181 R305 AZ263074 R-METAL OXIDE(S);330ohm,5%,2W,AG,TP,3.9X 2003-002205 R306 AZ263074 R-METAL OXIDE(S);330ohm,5%,2W,AG,TP,3.9X 2003-002205 R212 AZ263025 R-METAL;10KOHM,1%,1/8W,AA,TP,1.8X3.2MM 2004-000218 R313 AZ264001 R-METAL;6.8Kohm,1%,1/8W,AA,TP,1.8x3.2m 2004-001137 R417...
  • Page 36 Electric Parts List LOC NO PARTS NO Description & Specification REPLACEMENT NO Q’ty REMARKS C905 AZ161102 C-CERAMIC,MLC-AXIAL;1nF,10%,50V,Y5P,TP,3.5x19,- 2202-000796 C923 AZ161102 C-CERAMIC,MLC-AXIAL;1nF,10%,50V,Y5P,TP,3.5x19,- 2202-000796 C632 AZ161221 C-CERAMIC,MLC-AXIAL;220PF,10%,50V,Y5P,TP,3.5*19,- 2202-000806 C247 AZ161999 C-CERAMIC,MLC-AXIAL;18pF,5%,50V,CH,TP,3.5x1.9,- 2202-000849 C419 AZ161702 C-CERAMIC,MLC-AXIAL;560pF,10%,50V,Y5P,TP,3.5x19mm, 2202-000863 C218 AZ161104 C-CERAMIC,MLC-AXIAL;100nF,80-20%,50V,Y5V,TP,2.2x3. 2202-002037 C219 AZ161104 C-CERAMIC,MLC-AXIAL;100nF,80-20%,50V,Y5V,TP,2.2x3.
  • Page 37 Electric Parts List LOC NO PARTS NO Description & Specification REPLACEMENT NO Q’ty REMARKS C641 AZ164001 C-AL;4.7uF,20%,50V,GP,TP,5x11,5 2401-000027 C643 AZ164001 C-AL;4.7uF,20%,50V,GP,TP,5x11,5 2401-000027 C210 AZ164041 C-AL;100uF,20%,16V,WT,TP,6.3x11,5 2401-000287 C913 AZ164041 C-AL;100uF,20%,16V,WT,TP,6.3x11,5 2401-000287 C915 AZ164041 C-AL;100uF,20%,16V,WT,TP,6.3x11,5 2401-000287 C918 AZ164041 C-AL;100uF,20%,16V,WT,TP,6.3x11,5 2401-000287 C816 AZ165002 C-AL;100uF,+30-10%,200V,HR,TP,16x25 2401-000293 C302...
  • Page 38 Electric Parts List LOC NO PARTS NO Description & Specification REPLACEMENT NO Q’ty REMARKS L711 AZ361001 INDUCTOR-AXIAL;10UH,10%,2.5X3.4MM 2701-000114 L907 AZ361001 INDUCTOR-AXIAL;10UH,10%,2.5X3.4MM 2701-000114 L103 AZ361002 INDUCTOR-AXIAL;10UH,10%,2.8X7MM 2701-000115 L208 AZ361005 INDUCTOR-AXIAL;2.2UH,10%,2.5X3.4MM 2701-000146 L102 AZ361007 INDUCTOR-AXIAL;22UH,10%,4.2X9.8MM 2701-000159 L209 AZ361008 INDUCTOR-AXIAL;3.3uH,5%,2.5x3.4mm 2701-000168 L210 AZ361008 INDUCTOR-AXIAL;3.3uH,5%,2.5x3.4mm 2701-000168 L604...
  • Page 39 SPEAKER;5W,16OHM,90DB,150HZ 3001-000280 AZ664095 LEAD CONNECTOR-ASSY;-,SMH025-04,REC,4P,300,700,100 AA39-20504B AZ760044 STOPPER-PCB;501H,HIPS,NTR,HB,-,- AA61-40113A KNPOMA AZ760018 SPRING-CS;-,SUS304,0.5,OD6,H12,N7,-,-,- AA61-60003J AZ760044 WINDOW-REMOCON;-,21S03,-,PC,VO,VIOLET,- AA64-00429B AZ760045 INDICATOR-LED;-,21S03,-,ACRYL,-,NTR,- AA64-00431B AZ760046 BADGE-BRAND;AL,-,SILVER,L46,TOSHIBA,-,- AA64-70110B AZ760052 SCREW-TAPPING;RH,+,2,M4,L15,ZPC(BLK),SWRCH18 HA60-020003 KC+CF AZ760052 SCREW-TAPPING;RH,+,2,M4,L15,ZPC(BLK),SWRCH18 HA60-020003 SPK+CF AZ760052 SCREW-TAPPING;RH,+,2,M4,L15,ZPC(BLK),SWRCH18 HA60-020003 WR+CF AZ760052 SCREW-TAPPING;RH,+,2,M4,L15,ZPC(BLK),SWRCH18 HA60-020003 AZ760042 KNOB-POWER;-,21S03,MA L/GRAY,ABS,HB,GRAY...
  • Page 40 Electric Parts List 7-2 21S04D (21S04B and 21S04D Dissimilar Parts) LOC NO PARTS NO Description & Specification REPLACEMENT NO Q’ty REMARKS AZ664124 ASSY-POWER,CORD;-,CP2/NO(4.0),H/C250,KKJ| AA96-20122A AZ664125 ASSY-PCB,MAIN(OPT);CW21S04D,TSB,KS3A/C HA94-100717 7-3 21S04F (21S04B and 21S04F Dissimilar Parts) LOC NO PARTS NO Description & Specification REPLACEMENT NO Q’ty...
  • Page 41 Schematic Diagrams 8. Block Diagrams 8-1 Power Diagram...
  • Page 42 Schematic Diagrams 8-2 Block Diagram...

  • Page 43: Wiring Diagram

    Wiring Diagram 9. Wiring Diagram CONTROL PCB SIDE AV PCB CN704 TO SPEAKER CN702 CNY02 CNY01 SC-1 GND SY-I GND SC-O GND SY-O S-VHS IN-OUT KEY2 KEY1 GND KEY3 TIME STD GND CN703 FROM MAIN SOUND AMP CN701 AV2 VIDEO IN-OUT CN901 CN902 CN602...
  • Page 44 Schematic Diagrams 10. Schematic Diagrams 10-1 MAIN 1 TP07 TP01 TP08 TP02 TP09 TP03 TP10 TP04 TP05 TP06 Samsung Electronics 10-1...
  • Page 45 Schematic Diagrams 10-2 MAIN 2 TP11 TP12 TP13 TP14 TP15 TP25 10-2 Samsung Electronics...
  • Page 46 Schematic Diagrams 10-3 MAIN3 TP22 TP16 TP23 TP17 TP24 TP18 TP19 TP20 TP21 Samsung Electronics 10-3...
  • Page 47 Schematic Diagrams 10-4 MAIN 4 TP32 TP26 TP33 TP27 TP34 TP28 TP35 TP29 TP30 TP31 10-4 Samsung Electronics...
  • Page 48 Schematic Diagrams 10-5 PIP Samsung Electronics 10-5...
  • Page 49 Schematic Diagrams 10-6 CRT, SIDE AV, VIDEO SWITCH SIDE AV VIDEO SWITCH 10-6 Samsung Electronics...
  • Page 50 Schematic Diagrams 10-7 DOUBLE FOCUS, CONTROL DOUBLE FOCUS CONTROL Samsung Electronics 10-7...
  • Page 51 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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