Toshiba 26AV500U - 26" LCD TV Service Manual Download Page 11 | Manualshive

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ATSC/NTSC RF

KEYPED
IR/LED
POWER BOARD

S/PDIF

AV/SV VIDEO

AV/SV AUDIO

SPEAKER

SIDE AV VIDEO

SIDE AV AUDIO

AUDIO OUT

LVDS OUT

COMPONENT 1 VIDEO

COMPONENT 1 AUDIO

COMPONENT 2 VIDEO

COMPONENT 2 AUDIO

RS232

VGA

PC AUDIO

HDMI 1

CONTROL SIGNAL

HDMI2

VIDEO SIGNAL
AUDIO SIGNAL

MCU

WT61P7

COMPONENT SW

BA7657F

RS232

TRANSFORM

ST3243E

DDR 32Mx16

HY5PS121621CFP

SPI FLASH 32M bit

M25P32-8

TUNER

ENG36E32KF

AMP

TPA3100D2-HTQFP

AUDIO DAC/SW

AK4682EQ

SCALER

ZR39770

10

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Summary of Contents for 26AV500U - 26" LCD TV

Page 1: ... green product When repairing this green product use the part s described in this manual and lead free solder 2 For 1 and 2 refer to GREEN PRODUCT PROCUREMENT and LEAD FREE SOLDER TOSHIBA CORPORATION 2009 For Technical Bulletins Technical Tips or other information regarding the service of this model visit the Toshiba America Consumer Products National Service Division website at www7 toshiba com ...

Page 2: ... of this product The melting temperature of lead free solder is higher than that of leaded solder by 86ºF to 104ºF 30ºC to 40ºC Use of a soldering iron designed for lead based solders to repair product made with lead free solder may result in damage to the component and or PCB being soldered Great care should be made to ensure high quality soldering when servicing this product especially when sold...

Page 3: ...µF AC type capacitor between a known good earth ground water pipe conduit etc and the exposed metallic parts one at a time Measure the AC voltage across the combination of 1500 ohm resistor and 0 15 µF capacitor Reverse the AC plug at the AC outlet and repeat AC voltage measurements for each exposed metallic part Voltage measured must not exceed 0 3 volts rms This corresponds to 0 2 milliamps AC A...

Page 4: ...ct can adversely affect the performance Also use caution when handling the polarized screen because it can easily be damaged 4 If the panel surface becomes soiled wipe with cotton or a soft cloth If this does not remove the soiling breathe on the surface and then wipe again If the panel surface is extremely soiled wipe the panel surface with CRT cleaner sprayed onto the cloth Do not spray the clea...

Page 5: ...Do not store the LCD module below the temperature conditions described in the specifications Doing so could result in freezing of the liquid crystal loss of resilience or other damage 10 Do not disassemble the LCD module Such actions could result in improper operation 11 When transporting the LCD module do not use packing containing epoxy resin amine or silicon resin alcohol or oxim The gas genera...

Page 6: ...isplay Inverter CN3 Supply Input Chassis Layout 26 Inch Main AV Switching Tuning Audio Digital SYSCON Power Supply Standby 5 V Switched Chassis and Display Sources Front Jack Manual Controls CN1 Manual Controls IR P203 PS Output to Display Not Used CN6 Side Jack CN4 Speaker 5 ...

Page 7: ...Display P201 PS Output CN3 Supply Input CN5 LVDS to Display Power Supply Generates Standby 5 V Switched Chassis and Display Sources Main Responsibilities AV Switching Tuning Audio Digital SYSCON CN1 Manual Controls and Remote Receiver CN4 Speaker Output CN6 Side Jack 6 ...

Page 8: ...nnectors 9 screws into jack assemblys 3 To remove chassis assembly from display Remove 8 screws from sides of chassis assembly Remove 4 screws into bezel at top and 4 at bottom 2 2 2 2 4 4 4 Finally removed outlined plugs and cabling then lift chassis free of bezel and display As this is done be sure to release and unplug LVDS cable connected to the panel control board 5 To remove display from bez...

Page 9: ...5 10 Power Supply Standby 5V Switched Chassis and Display Sources CN3 16P CN5 30P Blue Italic Indicates Standby Voltages Indicates Signal Flow Direction 13 Pwr ON 14 ACD 15 Dim CN4 4P 24V 3 4 8 9 10 11 13 14 15 P203 12P 1 5 11 12 5 10 24V GND CN6 6P Front Jack Panel LVDS Manual Controls IR Receiver Power Supply Speakers Inverter Inverter Indicates Pin 1 plug orientation GND NC ERR ON BRT IC 8 ...

Page 10: ... POWER_EN 13 BRT 13 BRT 18 GND 20 GND 14 POWER GOOD 14 POWER GOOD 14 IC 14 IC 19 Rx2 21 TxCLK 15 BL_BR_CNTRL 15 BL_BR_CNTRL 20 Rx2 Side IO board 22 EXT_VBR_B 16 BKLT_EN 16 BKLT_EN Inverter 12P Inverter 12P 21 GND 23 TxCLK 1 24Vinv 1 24Vinv 22 CLK Side IO board 2x3P Side IO board 2x3P 24 DCR_VBR_B 2 24Vinv 2 24Vinv 23 CLK 1 CVBS 1 GND 25 GND 3 24Vinv 3 24Vinv 24 GND 2 GND 2 R 26 LVDS_SEL 4 24Vinv 4...

Page 11: ...MPONENT 1 VIDEO COMPONENT 1 AUDIO COMPONENT 2 VIDEO COMPONENT 2 AUDIO RS232 VGA PC AUDIO HDMI 1 CONTROL SIGNAL HDMI2 VIDEO SIGNAL AUDIO SIGNAL MCU WT61P7 COMPONENT SW BA7657F RS232 TRANSFORM ST3243E DDR 32Mx16 HY5PS121621CFP SPI FLASH 32M bit M25P32 8 TUNER ENG36E32KF AMP TPA3100D2 HTQFP AUDIO DAC SW AK4682EQ SCALER ZR39770 10 ...

Page 12: ...11 ...

Page 13: ...er supply supply module No Is the ACD AC Detect level less than 07V at pin 14 of P201 when AC is applied Yes No Suspect a problem with the power supply module Does the secondary 12 volt source appear at pin 8 of P201 when the on off button is pressed No No Suspect a problem with the SYSCON circuit located on the Main module Yes Yes Suspect a problem with the signal circuits located on the Main mod...

Page 14: ...n normally when the unit is turned on YES NO Troubleshoot for backlight problelms Is the screen discolored or does it have streaks or dark areas with no signal input NO If the LCD Control Board is available try it If this does not help replace the LCD display panel YES Examples Warranty Concession required for LCD panel replacement Digital photo may be requested Contact Toshiba at www7 tacp com fo...

Page 15: ... pins 3 and 4 of P201 when the unit is turned on YES NO If it is available try one or both CCF inverters If this does not help replace the LCD display Warranty Concession required for LCD panel replacement Digital photo may be requested Contact Toshiba at www7 tacp com for warranty authorization Backlight Troubleshooting Is 5VDC present at pin16 of P201 when the unit is turned on YES NO Replace th...

Page 16: ... no sound or is the audio distorted No Sound Does the power supply generate the audio supply voltages 12VDC at pins 8 and 9 and 24 volts at pins 3 and 4 of P201 when the unit is turned on Distorted YES NO Replace the power supply module YES NO Replace the Main module Problem solved No or distorted Audio 15 ...

Page 17: ...Follow the Service manual using the correct model number for detailed Service Mode instructions 16 ...

Page 18: ...Firmware Update See addendum for Procedure 17 ...

Page 19: ...Training Attachment 32AV500U Running Panel Change 75007870 75011933 Power PCB 18 ...

Page 20: ...Service Firmware Update Tool and USB Drivers 1 Install the USB to Serial Adapter drivers Instructions are on the CD driver disc included with the adapter Attach the USB to Serial Adapter to the USB port of your computer 2 Copy the contents of the supplied 2008FWKT01 Service Firmware Update Tool CD to a directory on your PC Note the name and location of the directory for future reference 3 Copy the...

Page 21: ...to Serial Adapter must be connected to identify the assigned port 7 Set the Baud Rate to 115200 8 Select the BROWSE button to open the image file browser 9 Select the Firmware update file with file extension ecc for the TV receiver being updated The Firmware update file will be in the directory where you placed the contents from step 3 in the Installation and Setup procedure Select Serial Port of ...

Page 22: ...3 10 Select Open 11 Select Ok 12 Select down to start the download process Select Update File for the model being 21 ...

Page 23: ...CD TV receiver Connect the Serial Cable to the USB to Serial Adapter between the Serial Cable and the PC USB port as shown below 3 Apply AC power to the TV receiver Confirm the TV receiver is in the Off state 4 Confirm that steps 1 through 13 of the Installation and Setup of the iDev Software Tool and USB Drivers were completed and the iDev software is waiting for ping as described in step 13 USB ...

Page 24: ...nd safety procedures as defined in the Toshiba Service Manual Product Safety Precautions Product Safety Precautions are described in the Toshiba service manual s for models covered in this instruction All safety precautions and checks shall be complied with before returning the equipment to the customer Servicers who defeat safety features or fail to perform safety checks may be liable for any res...

Page 25: ...R525 P2 PC103 R231 R230 R232 Q202 C212 P202 24V 12V GND 24Vaud 5V P201 GND PWR ON ACD 24V 12V 5V ACD PWR ON GND 24Vaud P4 R101 R102 R103 R104 R105 R106 SC101 J201 C610 S2 S2 S4 S4 D102 D103 D101 D105 D104 D601 D602 D603 ZD504 ZD201 ZD202 D207 D205 FB601 FB501 Q601 SC101 SC101 T101 P4 D107 D108 D204 J202 CY104 CX101 R601 R602 R603 R141 D109 C116 C117 Q107 D110 D111 ZD101 FB201 CY105 FB202 C118 F101...

Page 26: ...00751L04 E109 75011270 SPEAKER ASSY 7W 6OHM160X58X43 9 39C00651L02 E110 75011292 PC BOARD ASSY MAIN M B VTV L3705 39C00751L06 E111 75011293 H CON SET STV32T STV37T INV POW P804 12P 39C00751L07 E112 75011294 H CON SET STV32T STV37T INV POW P803 14P 39C00751L08 E113 75011279 H CON SET STV26T MB POW P802 39C00651L12 E114 75011296 H CON SET STV32T AC INLET P8 39C00751L10 E115 75011297 POWER MODULE STV...

Page 27: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...

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