Toshiba Regza 40XF550U Service Manual Download Page 14

Page: 14 / 16

problem associated

with analog or digital

(HDMI) inputs?

YES

Analog

Digital

Suspect the

Tuner-AV

PCB.

Using the power

distribution diagram,

are the voltages normal

at P811A and

P811B?

Suspect the
Low B PCB.

Using

the power

distribution diagram, are

the voltages normal at

CN90?

YES

Suspect the Seine module.

This

can be confirmed by using the wiring

interconnect diagram and an oscilloscope and

checking the right and left audio signals at

CN70. They will be distorted or missing.

No or distorted

Audio

Summary of Contents for Regza 40XF550U

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 solde...

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 ...

Page 4: ...t 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 clean...

Page 5: ...o 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 generat...

Page 6: ...ng the MUTE button press MENU button on TV set Selecting the Adjusting Item Every pressing of CH or button in the service mode changes the adjustment items Adjusting the Data Pressing of VOLUME or button will change the value of data in the range from 00H to FFH The variable range depends on the adjusting item Exiting Service Mode Press the POWER button once to turn off the TV 5 5 ...

Page 7: ...as described below XF550U Blue Yellow Green MODE LED LED LED POWER OFF POWER OFF Standby POWER ON Quick Start Mode Fan Stop Detection Blink IIC BUS Error Slow Blink Power Protection Detection Quick Blink Booting 3 Blinks Upgrade in progress Upgrade successful Upgrade failed Charis Calibration Error Slow Blink Slow Blink 6 ...

Page 8: ...LOW B U02A Key U03D AV FRONT U03B POWER U01A LED IR PATH U03C TU AV U03A ILLMINATION U03E CHARIS U05A SEINE U04A 7 ...

Page 9: ...0 14P 6VD LCD VCC 12V 3 3VD2 3 3VD1 Blue Italic Indicates Standby Voltages Red Indicates Switched Voltages Power Low B Tuner AV Seine 8 10 12 8 10 12 Cr Cb Y Indicates Signal Flow Direction 10 11 10 11 CN71A 22P CN71 L R 5 32V CN60 51P LVDS Out To Charis PCB Charis Out 6 9 10 5 4 PJ80A 10P To Charis 3 3V 120HZ 3 3V 120HZ 5V2 12V LCD 12V LCD 6 9 10 5 4 PJ80 10P 3 1 6V 24V 5 3 1 Video out to Seine A...

Page 10: ...9 ...

Page 11: ... on the unit No Yes Is 5VDC present at pin 1 of P806A when the unit is plugged in No Suspect the Low B supply PCB Is 5VDC present at pin 12 of P811A with the unit plugged in No Yes Suspect the Low B PCB Suspect the Tuner AV PCB Yes Use the LED blink chart to help locate the problem Suspect the power supply PCB Dead set no sound or picture 10 ...

Page 12: ... the Y Pb Pr signals at plug CN71A They will be Missing or distorted YES Suspect the Low B PCB NO No or distorted video Does the back light function normally when the unit is turned on YES NO Use the backlight troubleshooting flowchart on next page Does the screen display streaks negative picture lines or dark areas NO Suspect the Charis module or the LCD display panel YES Examples of Defective Di...

Page 13: ... the unit is turned on YES NO Suspect the Power supply Is 12VDC present at pin 13 of CN90 when the unit is turned on NO YES Replace the Low B PCB Is 3 3 VDC present at pin 21 of P811B shortly after the unit is turned on YES Replace the Tuner AV PCB NO Warranty Concession required for LCD panel replacement Digital photo may be requested Contact Technical Support Improper backlight operation 12 ...

Page 14: ...oltages normal at P811A and P811B Suspect the Low B PCB Using the power distribution diagram are the voltages normal at CN90 NO YES Suspect the Seine module This can be confirmed by using the wiring interconnect diagram and an oscilloscope and checking the right and left audio signals at CN70 They will be distorted or missing No or distorted Audio 13 ...

Page 15: ...SS LVDS V90A00089800 P801 75002678 POWER CORD INQ2682 1 U01A 75011023 PWU POWER PE0450B1 U02A 75011029 PWU LOWB PE0571A1 U03A 75011024 PWU TU AV PE0556A1 U03B 75011025 PWU F AV PE0556A2 U03C 75011026 PWU LED IR PATH PE0556A3 U03D 75011027 PWU KEY PE0556A4 U03E 75011028 PWU LED ILLUMI PE0556A5 U04AS 75011114 PC BOARD ASSY PE0524A SEINE U05A 75011030 PWU CHARIS PE0363D1 UF01 23125932 MOTOR DCFAN 12V...

Page 16: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...

Search results

Summary of Contents for Regza 40XF550U

Reviews:

Related manuals for Regza 40XF550U

Brands by name

Popular brands

Toshiba Regza 40XF550U, Service Manual

Search results

Summary of Contents for Regza 40XF550U

Reviews:

Related manuals for Regza 40XF550U

Brands by name

Popular brands