Toshiba 15VL26P Service Manual
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Toshiba 15VL26P Service Manual

Toshiba 15VL26P Service Manual

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FILE NO. 050-200223
SERVICE MANUAL
LCD TV
15VL26P
5
Nov., 2002

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Summary of Contents for Toshiba 15VL26P

  • Page 1 FILE NO. 050-200223 SERVICE MANUAL LCD TV 15VL26P Nov., 2002...

  • Page 2: Product Safety Notice

    PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These charac- teristics are often passed unnoticed by a visual inspection and the protection afforded by them cannot neces- sarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual and its supplements;...

  • Page 3: Safety Notice

    SAFETY NOTICE 3. If the panel’s surface gets dirty, wipe it with cotton or a soft cloth. If it is still dirty, try breathing on the Handling the LCD Module surface to create a light condensate and wipe it again. If the surface is very dirty, we recommend a CRT Safety Precaution cleaning agent.
  • Page 4 6. CMOS-LSI circuits are used in the module, so guard 9. Do not disassemble the LCD module. Disassembly can against damage from electrostatic discharge. Be sure cause malfunctions. to wear a wrist or ankle ground when handling the module. 7. Do not expose the module to direct sunlight or strong 10.

  • Page 5: Table Of Contents

    CONTENTS SECTION 1 GENERAL DESCRIPTIONS AND PART REPLACEMENT 1. LOCATION OF PARTS ............. 1-1 2-11.Switch PC Board ..............1-8 1-1. Buttons on the Front Panel, and 2-12.Hinge, Top Cover ..............1-8 Terminals on the Side and the Back Panel ......1-1 3.
  • Page 6 This page is not printed.

  • Page 7: Location Of Parts

    SECTION 1 GENERAL DESCRIPTIONS AND PART REPLACEMENT 1. LOCATION OF PARTS 1-1. Buttons on the Front Panel, and Terminals on the Side and the Back Panel <Front> <Rear> TV/Video Volume Channel Power up/down up/down Headphone jack (2) : Video 2 input terminals (Video Audio L/R) Aerial input DC Input...

  • Page 8: Remote Control

    FAST BACK STOP Note: CHAPTER Toshiba VCR,DVD can be operated with these buttons. OPEN/CLOSE BACK press to pause or still. (DVD/VCR) press to open/close the tray. (DVD/VCR) Prev press to skip back the current chapter or track.

  • Page 9: Location Of Main Parts

    1-3. Location of Main Parts U004 Inverter PC board U003 Sensor PC board U002 Switch PC board U001 Main PC board Fig. 1-1-3...

  • Page 10: Removal

    Note: 2. REMOVAL • A "snapping" sound will be heard when the claw is 2-1. Front Panel released. 1. Remove five screws (1). • Take care not to scratch the LCD. • Caution should be taken to avoid injury from edges on Screws (1) metal areas when removing the LCD panel.

  • Page 11: Inverter Pc Board

    3. Turn the LCD (2) on its back and remove two screws 3. Remove the connectors (4) from the four locations and (4). remove the wire from the three locations of claw B. 4. Slide the back lights (5) on the top and bottom out to Connector (4) the left side and remove the LCD (2).

  • Page 12: Sensor Pc Board

    2-4. Sensor PC Board 2-5. LCD Rear Cover 1. Remove one screw (1) and remove the connector (2) 1. Remove the front panel, the LCD panel and the from the one location, then remove the sensor PC inverter PC board. (Refer to item 1-1, 1-2 and 1-3.) board (3).

  • Page 13: Wall Hanging Plate

    2-6. Wall Hanging Plate 2-8. Side Cover 1. Remove three screws (1), then remove the wall 1. Remove the left and right side covers. hanging plate (2). Side cover (right) Screws (1) Wall Hanging Plate (2) Side cover (left) Fig. 1-2-14 Fig.

  • Page 14: 2-10.Front Net, Speaker

    3. Remove the core (5) and the cushion (6) from the 20 2-11. Switch PC Board pin connector (4). 1. Remove the cushion (1). 4. Remove the connectors (4) from the four locations, 2. Remove the connector (2). then remove the main PC board (7). 3.

  • Page 15: Gnd Lead Wire Connection Diagram

    3. GND LEAD WIRE CONNECTION DIAGRAM When assembling, refer to the diagram below for the GND lead wire connection. Left Right hinge hinge Left Right support support Connector Main PC board GND lead wire Switch PC board Right speaker Front net Fig.

  • Page 16: Troubleshooting

    4. TROUBLESHOOTING 4-1. No Power (No Video & No Sound) 12Vcc = 12V ? (IC801 Pin 5) IC801 CHECK/REPLACE CHECK/REPLACE 5Vcc = 5V ? Pin 1 = 12V ? IC803, L804, D802 F801, L801, ADAPTER IC801 CHECK/REPLACE CHECK/REPLACE 3.3Vcc = 3.3V ? Pin 4 = LOW ? IC801 IC804...

  • Page 17: No Video

    4-2. No Video 4-2-1. No Video (Sound O.K) OSD DISPLAY O.K ? LCD PANEL CHECK/REPLACE CHECK/REPLACE IC201 PDA [0..23] LAMP ON ? IC201 IC701, INVERTER SIGNAL O.K ? IC101 IC301 CHECK/REPLACE CHECK/REPLACE Pin 62, 63 OSC O.K ? OUTPUT O.K ? X101, IC101 IC201, IC301 CHECK/REPLACE...

  • Page 18: No Sound (Video O.k)

    4-3. No Sound (Video O.K) IC601 Pin 27, 28 OUTPUT O.K ? IC601 Pin 66, 65 IC681 Pin 4, 6 CHECK/REPLACE CHECK/REPLACE 11, 12, 13 = 5V ? OUTPUT O.K ? SPEAKER, WIRE IC601, L601, L602 IC681 IC601 CHECK/REPLACE CHECK/REPLACE Pin 7 = 12V ? Pin 39 = 8V ? IC681, R681...
  • Page 19 SECTION 3 PARTS LIST SAFETY PRECAUTION The parts identified by ! ( ) mark are critical for safety. Replace only with part number specified. The mounting position of replacement is to be identical with originals. The substitute replacement parts which do not have the same safety characteristics as specified in the parts list may create shock, fire or other hazards.
  • Page 20 1. EXPLODED VIEWS 1-1. Packing Assembly A702 Y106 P803 P804 P802 A702 A702 A703 M001 Y101 A702 A702 A701 A357 Fig. 3-1-1...
  • Page 21 1-2. Chassis Assembly A401 PN03 B213 B212 A350 PN01 PN03 A352 B212 U003 B212 B212 U004 A201 B205 A202 A204 A503 A302 B216 B215 A351 A205 B216 A302 B212 B215 B217 W661 B217 A301 U001 B212 A351 U002 A501 A502 B212 A203 B214...
  • Page 22 15VL26P / 1 2. PARTS LIST Location No. Parts No. Description A201 72790313 FRONT COVER A202 72790325 TOP COVER (EU) A203 72624045 BOTTOM COVER A204 72790322 LEFT SIDE COVER(EU) A205 72624049 RIGHT SIDE COVER A206 72741033 PLATE, WALL MOUNTING A301...
  • Page 23 Location No. Parts No. Description IC501 72790242 IC-VIDEO,SW , NJM2233BV IC502 72790290 IC-SDRAM , GL3820(DIP) IC601 72790292 IC-AUDIO PRO, MSP3410G-QA-B8-V3 IC651 72790244 IC-WOW,PROCESSOR , NJM2700 IC681 72790245 IC-AUDIO,AMP , TDA1517 IC701 72790246 IC-MICOM,OTP, S3P863AXZZ-AQBA IC702 72790247 IC-REGULATOR , MC78L05AD IC703 72790248 IC-EEPROM , 24C16 IC704...
  • Page 24 Location No. Parts No. Description L519 72790258 EMI FILTER , EF-1T2012-330JT L520 72790258 EMI FILTER , EF-1T2012-330JT L521 72790258 EMI FILTER , EF-1T2012-330JT L522 72790258 EMI FILTER , EF-1T2012-330JT L523 72790258 EMI FILTER , EF-1T2012-330JT L524 72790260 FERRITE BEAD, HH-1M3216-121J L525 72790258 EMI FILTER , EF-1T2012-330JT...
  • Page 25 Location No. Parts No. Description R226 72790272 FERRITE-BEAD, HB-1M2012-221JT R228 72790272 FERRITE-BEAD, HB-1M2012-221JT R229 72790272 FERRITE-BEAD, HB-1M2012-221JT R230 72790272 FERRITE-BEAD, HB-1M2012-221JT R251 72790274 NET FERRITE-B, HB-4M3216-301JT R252 72790274 NET FERRITE-B, HB-4M3216-301JT R253 72790274 NET FERRITE-B, HB-4M3216-301JT R254 72790274 NET FERRITE-B, HB-4M3216-301JT R255 72790274 NET FERRITE-B, HB-4M3216-301JT...

  • Page 26: Circuit Symbols And Supplementary Explanation

    SECTION 2 SERVICING DIAGRAMS 1. CIRCUIT SYMBOLS AND SUPPLEMENTARY EXPLANATION 1-1. Solid Resistor Indication 1-3. Capacitance Indication Table 2-1-1 Table 2-1-3 Symbol ..Carbon film Symbol ..Electrolytic, Special electrolytic ..Oxide metal film ..Ceramic, Film ..Ω Unit None Unit None...

  • Page 27: Block Diagrams

    2. BLOCK DIAGRAMS 2-1. Power Block Diagram F801 DC12V INVERTOR,SOUND AMP IC702 5V REG. IC801 POWER FET_SW 12VCC IC702 5VCC 5V REG. IC803 5V REG. 5VCC IC804 3.3V REG. 3.3VCC Fig. 2-2-1...

  • Page 28: Inverter Block Diagram

    2-2. Inverter Block Diagram INVERTOR PCB IC701 CN801 MICROPROCESSOR CN701 REMOTE PCB STANDBY LED POWER LED MAIN_SW KEY_IN1 Fig. 2-2-2...

  • Page 29: Pin Assignments (Microprocessor) Ic701: Ks88C6348

    2-2-1. Pin Assignments (microprocessor) IC701: KS88C6348 Name Signal In/Out Logic Remark IR-Input Active Low IR-IN Input Remote Control Signal Input MAIN-SWITCH INPUT Input Active High MASTER SW ON/OFF INPUT MAIN_SW DVD IDENT Input Active Low DVD_ID DVD JACK IDENT Input Active High SCART_ID Scart Ident...

  • Page 30: Main Block Diagram

    2-3. Main Block Diagram TTX DEC RGB F/B RGB F/B SDRAM TEA5114 SAA5264 FRAME MEMORY SCART-VIN SCART SCART-VOUT SCART-AIN MD[0..31] MA[0..10] Audio Video1 SCART-AOUT R[0..7] TX0+/TX0- RCA-A1 TTX-RGB F/B RCA-A1 Y[0..7] G[0..7] TX1+/TX1- LVDS IMAGE SCALER TX2+/TX2- DVD-YPbPr C[0..7] B[0..7] DS90C385 RCA-DVD VIDEO...

  • Page 31: Circuit Diagrams

    3. CIRCUIT DIAGRAMS 3-1. Power Supply Circuit Diagram JA801 F801 HEC3800-01-0 10 A TSC 5A C801 IC801 IC802 D801 L801 C802 220 u F/16V(DIP ) 12Vcc MC78M08C_DPAK 8Vcc FDS4435 C EC10DS1 ZJR5101-102 100nF R801 S10-G11 C803 100nF C805 C804 100nF C806 47 u F/16V 10 u F/16V...

  • Page 32: Microprocessor Circuit Diagram

    3-2. Microprocessor Circuit Diagram CN701 OPTION BOARD IC701 B3B-PH-K R701 1K IR_SIG KEY BOARD KS88C6348 C702 C701 10 u F/16V SPPH210100 IR IN BLON VIDEO_SEL R704 2.7K RED/GREEN STANDBY R705 R706 100 GREEN MAIN_SW LED-G R708 2.7K R707 R709 2.2K 1.3K DVD_ID LED-R...

  • Page 33: Input Jack Circuit Diagram

    3-3. Input Jack Circuit Diagram L502 EF-1T2012-330J T AV1_A_R 5Vcc SVHS_ID C501 R502 100nF D501 470K UDZS4.7B L503 JA502 FI-A2012-331KJ T YKC21-5856N SVHS_Y R503 L504 EF-1T2012-330J T AV1_A_L C502 C503 IC501 R504 C504 R505 10uF/16V 1uF(105) 47uF/16V AV1_V_IN VIN1 470K R506 C505 47uF/16V...

  • Page 34: Vpc3230 Circuit Diagram

    3-4. VPC3230 Circuit Diagram TTX_H_SYNC TTX_H_SYNC TTX_V_SYNC TTX_V_SYNC L101 C101 C102 C103 C104 PDA21 5Vcc FI-A2012-331KJ T 47uF/16V 220nF 1.5nF 390pF PDA22 PDA19 PDA20 C105 PDA[8..15 ] 2.2nF Q101 BC848 C107 C108 C106 TTX_CVBS 47nF 68nF R101 X101 C109 20.25MHz L102 R107 FI-B2012-222KJ T...

  • Page 35: Ttx&Caption Circuit Diagram

    3-5. TTX&Caption Circuit Diagram P2.0/PWM P1.5 TTX CAPTION CIRCUIT P2.1/PWM0 P1.4 TTX_50 P2.2/PWM1 ICX1 SAA5264 TTX_49 P2.3/PWM2 P2.4/PWM3 P1.3 FI-A2012-331KJT 3.3Vcc P2.5/PWM4 P1.2 100nF P2.6/PWM5 P1.1 P2.7/PWM6 P1.0 5Vcc 10uF/16V P3.0/ADC0 Vddp P3.1/ADC1 RESET XX1 12MHz P3.2/ADC2 XTALOUT 100nF 4.7K 4.7K P3.3/ADC3 XTALIN...

  • Page 36: Mxic Circuit Diagram

    3-6. MXIC Circuit Diagram R202 R204 CBA3216GA301N4 CBA3216GA301N 4 MD[0..31] C202 30pF R206 CB2012GA301 R219 CBA3216GA201N 4 MA[0..10 ] LDTG LVSYN C LHSYN C C228 C229 C230 56pF 56pF 56pF R207 GNDP GOUT1 CBA3216GA301N 4 GNDP MD15 MD15 GOUT0 RA[0..7] MD14 MD14 LDTG...

  • Page 37: Frame Buffer Circuit Diagram

    3-7. Frame Buffer Circuit Diagram MD[0.. 31] 3.3Vc c 3.3V cc C251 C2 52 C253 C2 54 C255 C256 C2 57 C258 C259 C2 60 C261 C2 62 C263 C264 10uF/16V 1 0 0nF 1 0 0nF 1 0 0nF 100nF 1 0 0nF 1 0 0nF...

  • Page 38: Panel Interface Circuit Diagram

    3-8. Panel Interface Circuit Diagram 3.3Vcc 3.3Vcc 3.3Vcc L301 IC3 02 FI-A2 012-331KJT FDS4435C L302 4 7 u H/2A4 R302 PANEL_VCC C301 C303 C302 L303 10uF/16V 1 0 0nF L304 C304 47uF/16V FI-A2 012-331KJT FI-A2 012-331KJT 100nF R303 Q301 PANEL_POWER BC 848 C306 C307...

  • Page 39: Sound Circuit Diagram

    3-9. Sound Circuit Diagram 5Vcc L601 C602 C603 AV_RESET FI-A2012-331KJ T 100nF 100pF C601 R602 R601 R603 10uF/16 V R604 C604 100nF MAIN_AUDIO_ R R605 C605 STANDBYQ DACA_L MAIN_AUDIO_ L C606 ADR_SEL VREF2 RF/SCART_S D_CTR_OUT0 DACM_R SIF_IN D_CTR_OUT1 DACM_L C607 R606 100pF DACM_SUB...

  • Page 40: 3-10.Wow Control Circuit Diagram

    3-10.Wow Control Circuit Diagram WOW_L_OUT WOW_R_OUT C653 C654 MODE1 1 0 0nF 1 0 0nF R651 WOW_SEL C651 C652 1 0 0nF MODE2 R652 100nF MODE3 R653 MODE2 C655 1 0 0nF FFL3 MODE2 C656 100nF MODE3 C657 1 0 0nF FFL2 MODE3 WOW_VREF...

  • Page 41: 3-11.Sound Amplifier Circuit Diagram

    3-11. Sound Amplifier Circuit Diagram R681 0.82 / 2W C6 82 C681 1 0 0nF 2200uF/16V IC681 TDA1517 C683 C684 1uF/ 50V R682 1000uF/16V MAIN_ AUDIO_L OUT_L R683 C685 JA681 8.2 K 330pF R684 YKB21-5101A C686 PHONEJACK STEREO 2 JACK 220uF/16V(DIP) R686 SPEAKER L...

  • Page 42: 3-12.Pin Voltage

    3-12.Pin Voltage Power Circuit (Page 2-7) IC801(FDS4435) PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE IC803(LM2596) PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE 7.3V Microprocessor Circuit (Page 2-9) IC702(MC78L05) PIN VOLTAGE IC701(Microprocessor) PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE 4.4V 22 4.6V 4.7V 23 3.8V...
  • Page 43 Input Jack Circuit (Page 2-11) VPC3230 Circuit (Page 2-13) IC501(NJM2233) PIN VOLTAGE IC101(VPC3230) PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE 2.7V 41 2.3V 42 2.3V 2.7V 1.9V 43 2.3V 1.4V 44 2.3V 1.4V 45 3.3V IC502(GL3820) PIN VOLTAGE 1.4V 46 0V PIN VOLTAGE...
  • Page 44 TTX & CAPTION Circuit (Page 2-15) ICX1(SAA5264) PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE 27 0V 28 0V 29 0V 30 0V 31 3.3V 32 0V 33 0V 34 0V 35 0V 10 0V 36 1.3V 11 0V 37 3.3V 12 0V 38 0V 13 0V 39 3.3V...
  • Page 45 MXIC Circuit (Page 2-17) MX88L284 PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE 3.3V 53 0V 105 3.3V 157 0V 3.3V 54 0V 106 0V 158 0V 2.4V 55 0V 107 3.2V 159 2.8V 2.4V 56 0V 108 0V 160 2.8V 2.4V 57 0V...
  • Page 46 Frame Buffer Circuit (Page 2-19) IC251(SDRAM) PIN VOLTAGE IC252(SDRAM) PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE 3.3V 26 0V 3.3V 26 0V 2.4V 27 3.1V 2.4V 27 3.1V 2.4V 28 3.1V 2.4V 28 3.1V 29 3.1V 29 3.1V 2.4V 30 3.1V 2.4V...
  • Page 47 Panel Interface Circuit (Page 2-21) Sound Circuit (Page 2-23) IC301(DS90CF385) PIN VOLTAGE IC601(MSP3410G) PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE 3.3V 29 0V 41 0V 1.7V 30 2.3V 4.4V 42 0V 1.7V 31 1.8V 4.2V 43 0V 1.7V 32 5V 3.5V...
  • Page 48 WOW Control Circuit (Page2-25) Sound AMP Circuit (Page2-27) IC651(NJM2700) PIN VOLTAGE IC681(TDA1517) PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE 25 0V 2.1V 5.8V 6.0V 26 4.6V 6.0V 27 0V 5.8V 11.7V 6.0V 28 6.0V 5.7V 2.1V 6.0V 29 6.0V 6.0V 30 6.0V...

  • Page 49: 3-13.Waveforms

    3-13.Waveforms IC803 PIN2 Power Circuit (Page 2-7) IC701 PIN23 Microprocessor Circuit (Page 2-9) IC701 PIN14 Microprocessor Circuit (Page 2-9) IC701 PIN22 Microprocessor Circuit (Page 2-9) IC701 PIN24 Microprocessor Circuit (Page 2-9) IC701 PIN41 Microprocessor Circuit (Page 2-9) 2-36...
  • Page 50 IC701 PIN40 Microprocessor Circuit (Page 2-9) TU1 PIN16 Input Jack Circuit (Page 2-11) TU1 PIN15 Input Jack Circuit (Page 2-11) 2-37...
  • Page 51 IC101 PIN28 VPC3230 Circuit (Page 2-13) IC101 PIN62 VPC3230 Circuit (Page 2-13) IC101 PIN56 VPC3230 Circuit (Page 2-13) IC101 PIN73 VPC3230 Circuit (Page 2-13) IC101 PIN57 VPC3230 Circuit (Page 2-13) 2-38...
  • Page 52 IC201 PIN35 MXIC Circuit (Page 2-17) IC201 PIN99 MXIC Circuit (Page 2-17) IC201 PIN101 MXIC Circuit (Page 2-17) IC201 PIN100 MXIC Circuit (Page 2-17) IC201 PIN70 MXIC Circuit (Page 2-17) 2-39...
  • Page 53 IC601 PIN33,34 Sound Circuit (Page 2-23) IC681 PIN6,4 Sound AMP Circuit (Page 2-27) IC601 PIN27,28 Sound Circuit (Page 2-23) IC651 PIN29,30 WOW Control Circuit (Page 2-25) 2-40...

  • Page 54: Pc Boards

    4. PC BOARDS 4-1. Main PC Board Fig. 2-4-1 U001 Main PC board (Top side) 2-41 2-42...
  • Page 55 Fig. 2-4-2 U001 Main PC board (Bottom side) 2-43 2-44...

  • Page 56: Switch Pc Board

    4-2. Switch PC Board Fig. 2-4-3 U002 Switch PC Board (Top side) Fig. 2-4-4 U002 Switch PC Board (Bottom side) 4-3. Sensor PC Board Fig. 2-4-5 U003 Sensor PC Board (Top side) Fig. 2-4-6 U003 Sensor PC Board (Bottom side) 2-45...

  • Page 57: Specifications

    SPECIFICATIONS Color system PAL/SECAM/NTSC4.43 Sound system BG/DK/I/L Rated voltage ~110V-240V 50/60 Hz. Power consumption Audio power 2W + 2W Speaker type 40 x 70 mm 2pcs. External Connections EXT1: 21pin SCART input Component video (Y. P ) input + Audio (L+R) input EXT2: Video input +Audio (L+R) input, Phone jack (output) Dimensions Width 366mm, Height 362mm, Depth 170mm...

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