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Toshiba 15VL56B Service Manual

Lcd color television
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SERVICE MANUAL
LCD Color Television
TOSHIBA CORPORATION, 2005
All manuals and user guides at all-guides.com
15VL56B
20VL56B
20VL56G
FILE NO. 050-200533
Published in Japan, Sep. 2005 (YC)

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  • Page 1 All manuals and user guides at all-guides.com FILE NO. 050-200533 SERVICE MANUAL LCD Color Television 15VL56B 20VL56B 20VL56G TOSHIBA CORPORATION, 2005 Published in Japan, Sep. 2005 (YC)

  • Page 2: Table Of Contents

    6. CHASSIS AND CABINET REPLACEMENT PARTS LIST .................... 40 7. PC BOARDS TOP & BOTTOM VIEW ..........................49 8. SCHEMATIC DIAGRAM ..............................52 8-1. WIRING DIAGRAM ..............................53 8-2. BLOCK DIAGRAM (20VL56B/G) ..........................54 8-3. BLOCK DIAGRAM (15VL56B) ..........................55 9. SPECIFICATIONS ................................. 74 - 2 -...

  • Page 3: Service Safety Precautions

    All manuals and user guides at all-guides.com SERVICE SAFETY PRECAUTIONS • The caution items shown here describe major safety issues and should always be observed. • The meanings of the various indications are as follows. Indicates a hypothetical situation in which service personnel and nearby third parties, or even WARNING end users due to a product defect after the service operation is completed, could possibly be in danger of injury or even death in the event of operational error.
  • Page 4 All manuals and user guides at all-guides.com WARNING • Always advise users to keep children away. There is danger of injury to children from tools, disassembled products, etc. KEEP CHILDREN AWAY • Always disconnect the power plug before starting work whenever power is not required. Failure to disconnect the power plug before starting work can result in electrical shock.

  • Page 5: Handling The Lcd Module

    All manuals and user guides at all-guides.com HANDLING THE LCD MODULE Safety Precautions 3. If the panel surface becomes soiled, wipe with cotton or a In the event that the screen is damaged or the liquid crystal soft cloth. If this does not remove the soiling, breathe on (fluid) leaks, do not breathe in or drink this fluid.
  • Page 6 All manuals and user guides at all-guides.com 7. Do not expose the LCD module to direct sunlight or strong ultraviolet rays for an extended period of time. 8. Do not store the LCD module below the temperature con- ditions described in the specifications. Failure to do so could result in freezing of the liquid crystal due to cold air or loss of resilience or other damage.

  • Page 7: Service Mode

    All manuals and user guides at all-guides.com 1.Service Mode 1-1.Starting Service Mode *Set LCD TV to the normal TV signal receive mode. Note: In this "Service Mode" section, [ ] shows a button. 1-1-1. Press [MUTE] on the remote control once. 1-1-2.
  • Page 8 All manuals and user guides at all-guides.com OPTION DEFAULT DATA 15VL56B Option 1 15VL56B SCART Side Comp 16:9 200 PR Text ACMS Option 2 15VL56B HiDev Hotel I ll SAVE Turbo Vol Ch/Aus Option 3 15VL56B Language Txt Lang Inch opt...

  • Page 9: Adjustment

    Connect Pattern Generator to the 15-pin D-Sub Jack of LCD TV. Change the TV input mode to PC mode. Set Pattern Generator to the following: 15VL56B : XGA (1024x768) 16-step or 11-step grayscale 20VL56B,20VL56G : VGA (640x480) 16-step grayscale Go into service mode, and Auto Gain menu appears, and then press VOL [+].

  • Page 10: Ddc Edid Data Read & Write

    All manuals and user guides at all-guides.com 2-3. DDC EDID Data Read & Write The following software programs are used to read/write DDC EDID data. DLPortIO.exe t15.edi t20.edi UserPort.exe UserPort.sys (Windows/system32/Drivers) WinEDID_2.0.exe Be very careful that DDC EDID data read/write varies depending on Operating System conditions of PC.
  • Page 11 All manuals and user guides at all-guides.com 2-3-1. Port Setup (Windows 2000, XP only) Copy "UserPort.sys" fi le to c:\windows\system32\drivers. - 11 -...
  • Page 12 All manuals and user guides at all-guides.com Double-click "DLPortIO.exe" to install port setting program. Double-click "DLPortIO.exe" When the port setting program starts up, the installation program runs automatically. Continue the installation by following instructions on the window. Click "Next" to continue Click "Yes"...
  • Page 13 All manuals and user guides at all-guides.com Select "Yes, I want to restart.." for PC restart and click "Finish" to complete the installation. Select "Yes, I want to restart.." and click "Finish" to complete the installation. Double-click "UserPort.exe" to begin the installation. Double-click "UserPort.exe".
  • Page 14 All manuals and user guides at all-guides.com Add data value "300-3FF" to two areas on the UserPort window and click "Add". After key in Value "300-3FF", click [Add] to store "300-3FF". Confi rm that "300-3FF" is added on the UserPort window. Then update the driver using the following procedure.
  • Page 15 All manuals and user guides at all-guides.com 2-3-2. Preparation EDID Reading & Writing Connect the LCD TV and PC using DDC Jig. (See the fi gure below.) After connection is completed, turn the power ON of the LCD TV. LCD TV Parallel Port Parallel Port Cable D-SUB Cable...
  • Page 16 All manuals and user guides at all-guides.com 2-3-3. EDID Reading Double-click "WinEDID.exe" to read EDID data. Double-click "WinEDID.exe". The WinEDID window opens. The program might read the current EDID data automatically. Current EDID data might be displayed on the WinEDID window. Ignore this error message appearing several times by clicking OK.
  • Page 17 All manuals and user guides at all-guides.com 2-3-4. EDID Writing Click [Open] on the WinEDID window, and search for EDIC fi le(*.edi) that matches TV size. t15.edi : 15VL56B t20.edi : 20VL56B,20VL56G Click [Open] When the fi le is found, click the fi le to open.
  • Page 18 All manuals and user guides at all-guides.com Click [Write] on the WinEDID window to update EDID data. Click [Write] When checksum error message appears, ignore this error and click [Y]. Upon writing process completed, "Write Data ..Finished" message will appear. Click [Y] Upon writing process completed, "Write Data ..Finished"...
  • Page 19 All manuals and user guides at all-guides.com 2-3-5. Confi rmation of Updated EDID Data Click [Read] to confi rm that the EDID data are written as copied from original data. Click [Read] Upon reading process completed, "Read Data ..Finished" message will appear. - 19 -...

  • Page 20: Vcti Firmware Installations/Upgrading

    All manuals and user guides at all-guides.com 3. VCTi Firmware Installation/Upgrading This LCD TV uses two fi rmware programs. 1. VCTi fi rmware 2. SCALER fi rmware When the main board or IC200 is replaced, be sure to install the VCTi49xxY firmware. (No program is included in the IC200 spare parts.) This fi...

  • Page 21: Vcti Firmware Installations

    All manuals and user guides at all-guides.com 3-1. VCTi Firmware Installation 3-1-1. Preparation Create a new folder on PC and copy the following fi les to the folder. VCTi_TSBxxx_xxx_Vxxx.bin (Vxxx shows fi rmware version.) vct49xyi.zip Setup_Visual_I2C_v3xxx.exe SetupLptDrv9x010400.exe Setup_LptDrv_v0202_XP_2000.exe Note: These software programs are supplied as required. Double-click Setup_Visual_I2C_v3xxx.exe.
  • Page 22 All manuals and user guides at all-guides.com Select appropriate driver fi le according to your PC OS. Windows 98 : SetupLptDrv9x010400.exe Windows 2000/XP : Setup_LptDrv_v0202_XP_2000.exe Double-click the fi le appropriate for your PC OS. The following window opens. Click [I Agree] on the installation window to complete the driver installation. Click [I Agree] to complete the driver installation.
  • Page 23 All manuals and user guides at all-guides.com 3-1-2. Proceeding VCTi Firmware Upgrading Preparation: Connect PC and TV using Jig before proceeding. Disconnect AC power cord of TV. Connect Jig to PC connector on TV with D-sub cable. Connect USB connector on Jig to USB connector on PC. Connect LPT port of Jig to LPT port of PC.
  • Page 24 All manuals and user guides at all-guides.com Double-click "vcth_tvt.vi2c" fi le in "vct49xyi" folder to install the fi rmware. Double-click "vcth_tvt.vi2c" fi le. An error message appears. Ignore this message. Click [OK] to continue installation. Click [OK] The following window appears. Double-click the fi le name next to [Load Bin -> Flash]. Double-click this fi...
  • Page 25 All manuals and user guides at all-guides.com Select VCTi_TSBxxx_xxx_Vxxx.bin copied in 3-1-1 and click [Open]. Confi rm that the selected fi le is displayed in "Name" on the Watch Item… window. Necessary fi rmware has been appeared. Click [OK]. Click [OK] Set printer (LPT) on the vcth_txt_vi2c window.
  • Page 26 All manuals and user guides at all-guides.com Click cross box mark till 21 or 22 appears. If 21 or 22 does not appear, TV may not be in the fi rmware installation mode. Unplug the AC power cord of TV and repeat steps from 3-1-2 "Preparation". Click [Erase Flash] to erase fl...

  • Page 27: Scaler Firmware Installations

    All manuals and user guides at all-guides.com 3-2. SCALER Firmware Installation 3-2-1. Preparation Create a new folder on PC and copy the following fi les to the folder. CGProbe Redistributable 5.1.0.5.exe ISPUtility 1.0.0.6.exe Toshiba_15(SCALER)_Verx.xx.hex (for 15-inch TV) Toshiba_20(SCALER)_Verx.xx.hex (for 20-inch TV) Note: These software programs are supplied as required.
  • Page 28 All manuals and user guides at all-guides.com Double-click "ISPUtility1.0.0.6.exe" to start installation of Genesis ISP Utility1. Continue the installation following instructions on the window. Double-click this to start installation Select "I accept the agreement" and click [Next] Click [Next] Click [Next] to continue the installation. Click [Next] Click [Next] Select the "create a desktop icon"...
  • Page 29 All manuals and user guides at all-guides.com 3-2-2. Proceeding SCALER Firmware upgrading Preparation: Connect PC and TV using Jig before proceeding. Disconnect AC power cord of TV. Connect Jig to PC connector on TV with D-sub cable. Connect USB connector on Jig to USB connector on PC. Connect D-sub 9 pin connector on Jig to D-sub 9 pin connector on PC.
  • Page 30 All manuals and user guides at all-guides.com Double-click "ISP Utility" icon created on the desktop to run the Genesis ISP Utility program. Set "connection" in ISP Settings to "Serial" on the Genesis ISP Utility window. Click [ ] to select "Serial" Set "Chip"...
  • Page 31 All manuals and user guides at all-guides.com Set all the settings on the Connection Settings window to those in the table below. Check all the settings, and then click [OK]. Item Setting Port COM1 Baud Rate 115200 Datat Bits Parity None Stop Bits Read Interva...
  • Page 32 All manuals and user guides at all-guides.com 3-2-3. SCALER Firmware Upgrading Set TV to service mode. Starting Service Mode Press [MUTE] on the remote control once. Keep pressing [MUTE] again. Volume indication appears on the TV screen. Press [ ] on TV when the Volume indication disappears.
  • Page 33 All manuals and user guides at all-guides.com Click [Start] on the Genesis ISP Utility window of PC to start installing new SCALER fi rmware. Click [Start] to install new SCALER fi rmware Check that the new SCALER fi rmware has been installed. Upon completion of the installation, "ISP successful"...

  • Page 34: Troubleshooting

    All manuals and user guides at all-guides.com 4. TROUBLESHOOTING Process A No power Ref.1/1-1 Check 15V or ST_ 5V Check short circuits of Main B/D or Change Power B/D of Power B/D Fail Pass Change VCTi(IC200) Check Output of Check IC 1004, IC1005 Of Main B/D IC1004, IC1005(Main B/D) PIN 7 LEVEL(High 3.3V)
  • Page 35 All manuals and user guides at all-guides.com No Raster on Video Signal No Raster on TV(RF) (Video1, Video2) Signal Pass Check 5V, 33V of TU100 Check the Output of Repeat Process A Re-soldering or TU100(Tuner) Fail Change the defect part Pass Check short circuits of Main B/D Check the Input source...
  • Page 36 All manuals and user guides at all-guides.com No Raster on PC Signal Repeat Process A Pass Ref.3/3-1 Check R715 Check short circuits of Check the Input/ Level(LOW 0V) Main B/D Output of IC701 Fail Fail Pass Pass Re-soldering or Change IC701 Ref.4/4-1 Check the Input / Output Re-soldering or...
  • Page 37 All manuals and user guides at all-guides.com No Raster on video Signall (Video3 , S-video) Repeat Process A Pass Check the Input Check short circuits of Main B/D source & side B/D Fail Pass Check R212 Check short circuits of Main B/D 1.Video2 : HIGH &...
  • Page 38 All manuals and user guides at all-guides.com No Sound No Sound (ALL MODE) (Only VIDEO 1 or PC mode) Change source Check short circuits Check the Input Check the R750 Level source input Video1 : High of Main B/D Fail Fail PC : Low Pass...

  • Page 39: Exploded View

    All manuals and user guides at all-guides.com 5. EXPLODED VIEWS 15VL56B/20VL56B/G - 39 -...

  • Page 40: Chassis And Cabinet Replacement Parts List

    • The part number must be used when ordering parts, in order to assist in processing, be sure to include the Model number and Description. ∗ • The PC board assembly with mark is no longer available after the end of the production. Model : 15VL56B/20VL56B/20VL56G Capacitors ..... CD Ceramic Disk : Plastic Film : Electrolytic Resistors ....
  • Page 41 All manuals and user guides at all-guides.com Location Parts No. Reference Description C152 72795148 0CH8106F691 ELECTROLYTIC, 10UF 16V 20% 105STD C200 72795180 0CK106EF56A CERAMIC, 10UF 3216 16V 10% X7 C201 72795155 0CH6102K406 CERAMIC CHIP, 1000PF 50V J SL 2012 C202 72795180 0CK106EF56A CERAMIC, 10UF 3216 16V 10% X7...
  • Page 42 All manuals and user guides at all-guides.com Location Parts No. Reference Description C554 72795177 0CK104CK56A CERAMIC, 0.1UF 1608 50V 10% R C555 72795172 0CH3104K566 CERAMIC, 0.1UF 50V 10% X7R 20 C713 72795359 0RH0000D622 METAL GLAZE, 0 OHM 1 / 10 W 2012 C719 72795171 0CH3103K516...
  • Page 43 All manuals and user guides at all-guides.com Location Parts No. Reference Description C1051 72795191 0CE107WF6DC ELECTROLYTIC, 100UF MVK 16V 20% R/ C1052 72795183 0CK225DH94A CERAMIC, 2.2UF 2012 25V 80%, - C1053 #2,#3 72795192 0CE107WH6DC ELECTROLYTIC, 100UF MVK 25V 20% R/ C1054 72795172 0CH3104K566...
  • Page 44 All manuals and user guides at all-guides.com Location Parts No. Reference Description R105 72795340 0RH3000D622 METAL GLAZE, 300 OHM 1 / 10 W 201 R106 72795335 0RH0682D622 METAL GLAZE, 68 OHM 1 / 10 W 2012 R109 72795352 0RH7501D622 METAL GLAZE, 7.5K OHM 1 / 10 W 20 R110 72795353 0RH7502D622...
  • Page 45 All manuals and user guides at all-guides.com Location Parts No. Reference Description R533 72795345 0RH4701D622 METAL GLAZE, 4.7K OHM 1 / 10 W 20 R534 72795359 0RH0000D622 METAL GLAZE, 0 OHM 1 / 10 W 2012 R535 72795345 0RH4701D622 METAL GLAZE, 4.7K OHM 1 / 10 W 20 R536 #2,#3 72795359...
  • Page 46 All manuals and user guides at all-guides.com Location Parts No. Reference Description R1301 72795345 0RH4701D622 METAL GLAZE, 4.7K OHM 1 / 10 W 20 R1302 72795364 0RH1002D622 METAL GLAZE, 10K OHM 1 / 10 W 201 R1304 72795345 0RH4701D622 METAL GLAZE, 4.7K OHM 1 / 10 W 20 R1305 72795363 0RH1001D622...
  • Page 47 6871TSTB52F PWB ASSEMBLY SIDE AV 72782424 6871TSTB49F PWB ASSEMBLY SCART JACK 72795326 6871TSTB51G PC BOARD ASSY, SUB, TOSHIBA 15 NON-BS JA #2,#3 72795325 6871TSTB51A PC BOARD ASSY, SUB, TOSHIBA 20-15 INCH( 72795324 6871TSTB50A PC BOARD ASSY, SUB, TOSHIBA 20-15 (NT-CK...

  • Page 48: Pc Boards Top & Bottom View

    All manuals and user guides at all-guides.com 7. PC BOARDS TOP & BOTTOM VIEW * The information contained in this section subjects to model. MAIN BOARD BOTTOM (FOIL) SIDE - 48 -...
  • Page 49 All manuals and user guides at all-guides.com MAIN BOARD TOP (COMPONENT) SIDE - 49 -...
  • Page 50 All manuals and user guides at all-guides.com CONTROL BOARD CONTROL BOARD BOTTOM (FOIL) SIDE TOP (COMPONENT) SIDE SIDE BOARD (20VL56B/G) SIDE BOARD (20VL56B/G) BOTTOM (FOIL) SIDE TOP (COMPONENT) SIDE SIDE BOARD (15VL56B) SIDE BOARD (15VL56B) BOTTOM (FOIL) SIDE TOP (COMPONENT) SIDE - 50 -...
  • Page 51 TOP (COMPONENT) SIDE IR BOARD IR BOARD BOTTOM (FOIL) SIDE TOP (COMPONENT) SIDE HEADPHONE BOARD (20VL56B/G) HEADPHONE BOARD (20VL56B/G) HEADPHONE BOARD (15VL56B) BOTTOM (FOIL) SIDE TOP (COMPONENT) SIDE BOTTOM (FOIL) SIDE HEADPHONE BOARD (15VL56B) TOP (COMPONENT) SIDE - 51 -...
  • Page 52 Model 15VL56B, 20VL56B/G Power source 100 - 240V AC, 50/60 Hz Power consumption 15VL56B : 50 W, 0.8 W (standby mode) 20VL56B/G: 65 W, 0.8 W (standby mode) Dimensions 15VL56B : 379 mm (W) 388 mm (H) 203 mm (D)
  • Page 53 Visible size (diagonal) 15VL56B : 38.0 cm 20VL56B/G: 51.0 cm Number of pixels 15VL56B : 1024 (H) dots × 768 (V) dots 20VL56B/G: 640 (H) dots × 480 (V) dots Audio power 5 W + 5 W (10% THD) Speakers 40 ×...
  • Page 54 All manuals and user guides at all-guides.com...
  • Page 55 All manuals and user guides at all-guides.com FILE NO. 050-200533 SERVICE MANUAL LCD Color Television 15VL56B 20VL56B 20VL56G TOSHIBA CORPORATION, 2005 Published in Japan, Sep. 2005 (YC)

  • Page 56: Schematic Diagram

    SCALER ................................7/17 INTERFACE ................................ 8/17 POWER ................................9/17 COMPONENT JACK ............................10/17 D-JACK ................................11/17 SCART JACK ..............................12/17 KEY ................................... 13/17 HEADPHONE ..............................14/17 LED & IR ................................15/17 SIDE (20VL56B/G) ............................16/17 SIDE (15VL56B) ............................... 17/17 - 52 -...

  • Page 57: Wiring Diagram

    All manuals and user guides at all-guides.com 8-1. WIRING DIAGRAM - 53 -...

  • Page 58: Block Diagram (20Vl56B/G)

    All manuals and user guides at all-guides.com 20VL56B/G 8-2. BLOCK DIAGRAM ( - 54 -...

  • Page 59: Block Diagram (15Vl56B)

    All manuals and user guides at all-guides.com 15VL56B 8-3. BLOCK DIAGRAM ( - 55 -...
  • Page 60 Either component YPbPr signal or PC RGB signal is selected by the switching IC and inputted to a scaler (GM2221), which is sent to the LCD module after being modified to an LVDS signal through the integrated LVDS IC.(Only 15VL56B) Or, it is sent to the LCD module as a TTL output.(Only 20VL56B/G) VCTi is the main microprocessor that handles video signal processing and sound signal processing.
  • Page 61 All manuals and user guides at all-guides.com * The information contained in this section subjects to model. 15VL56B/20VL56B/G TUNER (1/17) - 57 -...
  • Page 62 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G VCTI (2/17) - 58 -...
  • Page 63 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G INPUT (3/17) - 59 -...
  • Page 64 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G 3D COMB (4/17) - 60 -...
  • Page 65 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G S/W&ROM (5/17) - 61 -...
  • Page 66 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G (6/17) - 62 -...
  • Page 67 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G SCALER (7/17) - 63 -...
  • Page 68 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G INTERFACE (8/17) - 64 -...
  • Page 69 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G POWER (9/17) - 65 -...
  • Page 70 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G COMPONENT JACK (10/17) - 66 -...
  • Page 71 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G D-JACK (11/17) - 67 -...
  • Page 72 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G SCART JACK (12/17) - 68 -...
  • Page 73 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G (13/17) - 69 -...
  • Page 74 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G HEADPHONE (14/17) - 70 -...
  • Page 75 All manuals and user guides at all-guides.com 15VL56B/20VL56B/G LED&IR (15/17) - 71 -...
  • Page 76 All manuals and user guides at all-guides.com 20VL56B/G SIDE (16/17) - 72 -...
  • Page 77 All manuals and user guides at all-guides.com 15VL56B SIDE (17/17) - 73 -...

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