The Tcon board provides the video generated by the motherboard to be transferred to the panel, as well as generating the voltages the panel needs to operate.
Depending on the type of panel used, it is transferred from the 5V 3V3 16V and 26V tcon card to the panel. These voltages may be missing or more depending on the panel type. Tcon converts the 5V or 12V supply from the motherboard to the voltages required by the panel via the DCDC converters on it.
Some tcon cards work with 2 LVDS cables from the motherboard. Tcon feed is transmitted from only one of these cables. In televisions with 3D feature, 12V is transmitted from the mainboard to the tcona via a socket other than the LVDS cable. Consider this when making repairs.
If there is no 5V or 12V supply from the motherboard, check the "PANEL POWER" circuit on the motherboard. Transistors in this circuit can malfunction.
If Tcon supply is available but 16V and 26V are not available, check the inputs and outputs of the DCDC converter ICs. These integrated circuits may fail due to heat. These converters will not be activated until the "PANELON or PANELCTL" signal comes from the motherboard. In some tcones, if the panel is not connected to the tcon, tcon does not work.
If there are voltages but there is no picture, measure the data signals transmitted from the motherboard to the TC. Be careful while taking this measurement. If the probe causes a short circuit, the motherboard panel may malfunction. If you can measure a voltage between 1V2 and 1V6 on the data lines, it means that data signals are being sent from the motherboard to the tcona.
After that, what you need to do is to follow the voltages transmitted from the controller to the panel on the panel control card. If the fuses in the panel control card are good, replace the tcon card. If the fuses are blown or if heating / corrosion / oxidation has occurred in the smd parts, the panel is defective.
4046NN-MB4C6LV0.6
There's voice but no image. The television switches to standby after a while: ic29 (FDS4435) is defective.
V315B3-C04
No picture white screen: Q2 (A18E P type) is defective.
46T12-C01
The picture is broken prematurely: Q201 (AO3041A) is out of order.
6870C-0140B
No display: R128 (82Ohm) faulty.
T260XW01
Supply Voltage: 5 volts
1- U402 AN1702; will cause no video failure.
2- U202 MAX1889E; It regulates 5 volts and produces the voltages that the tcon needs. If this IC is faulty, tcon will not work.
3- U301 FPD87352AU; will cause no image or image negative malfunction.
4- U302 RAM; causes frostbite in the image.
T296XW01-007
Supply Voltage: 12 volts
1- U402 AN1702; will cause no video failure.
2- U303 EPROM; causes no picture or white screen malfunction.
3- U301 FPD87352B; will cause no image or image negative malfunction.
4- U302 RAM; causes frostbite in the image.
5- U901 U911 9743A; It regulates 12 volts and produces the voltages that the tcon needs. If these IC are faulty, tcon does not work.
T296XW01-011Supply Voltage: 12 volts
T296XW01-011
1- U301 FPD87352B; will cause no image or image negative malfunction.
2- U302 RAM; causes frostbite in the image.
3- U901 U911 9743A; It regulates 12 volts and produces the voltages that the tcon needs. If these ICs are faulty, tcon does not work.
4- U501 EL5420; will cause no video failure.
5- J501; If there is a problem with the pins, the image will vibrate / wiggle.
V315B3-C01Supply Voltage: 12 volts
v315b3-C01
1- U6 HX8915 GAMMA; will cause no image or image negative malfunction.
2- U3 CM1682A; causes freeze-up or no-image failure.
3- U4 EPROM; causes no picture or white screen malfunction.
4- UP1 TPS65161; It regulates 12 volts and produces the voltages that the tcon needs. If this IC is faulty, tcon will not work.
VDD25: 2V5
V12V: 12V
VAAP: 13V5
VGC: -5V
VGH: 23V
V420H1-CO7
Supply Voltage: 12 volts
v420h1-C07
1- U3 U4 RAM; causes frostbite in the image.
2- U16 CM2679B; will cause no image or image negative malfunction.
3- U7 I7868A GAMMA; will cause no image or image negative malfunction.
4- UP1 TPS65161; It regulates 12 volts and produces the voltages that the tcon needs. If these IC are faulty, tcon does not work.
MDK336V-0
Supply Voltage: 12 volts
MDK336V-0
1- IC6 BD8161; It regulates 12 volts and produces the voltages that the tcon needs. If these IC are faulty, tcon does not work.
2- IC2 TCON102A; no image or image causes negative or rainbow glitch.
3- IC4 EPROM; causes no picture or white screen malfunction.
4- IC5 BUF12800 GAMMA; will cause no image or image negative malfunction.
TX80012VC
Supply Voltage: 12 volts
TX80012VC
1- IC200 8018SA; It regulates 12 volts and produces the voltages that the tcon needs. If these IC are faulty, tcon does not work.
2- IC1002 TCON21.6; no image or image causes negative or rainbow glitch.
3- IC1003 XCON-1; will cause no video failure.
4- IC1001 IC1001 RAM; causes frostbite in the image.
5- IN74VHC74D; will cause no video failure.
V260B1-C01
Supply Voltage: 5 volts
V260B1
1- U3 CM1671; will cause no video failure.
2- U5 HX8904; It is used to amplify GAMMA signals. will cause no image or image negative malfunction.
3- U8 3V3 IC; Regulates 3V3 voltage. causes various display problems. for example "freezing-silent-recovery when warmed".
4- Q3 P2003BVG; It regulates 5 volts and produces the voltages that the tcon needs. If this IC is faulty, tcon will not work.
4- U11 DCDC CONVERTER; It produces voltages required by the panel by regulating 5 volts. If this IC is faulty, tcon will not work.
V320B1-C03
Supply Voltage: 12 volts
V320B1
1- U1 U2 RAM; causes frostbite in the image.
2- U3 CM2681AKQ; causes various display problems or no video failure. for example "freezing-silent-recovery-on-warming-horizontal vertical lines".
3- U5 EPROM; causes no picture or white screen malfunction.
4- U6 SL1014I GAMMA; will cause no image or image negative malfunction.
5- DCDC CONVERTER; It produces voltages required by the panel by regulating 12 volts. If this IC is faulty, tcon will not work.
V296W1-C1
Supply Voltage: 12 volts
V296W1
1- U1 U2 U3 RAM; causes frostbite in the image.
2- U4 CM2561BKQ; causes various display problems or no video failure. for example "freezing-silent-recovery-on-warming-horizontal vertical lines".
3- UP1 FA3269AV DCDC CONVERTER; It produces voltages required by the panel by regulating 12 volts. If this IC is faulty, tcon will not work.
CVOFT: 0V75
R17: 2V5
VDA: 13V5
VDD: 20V
VDL: -5V
Supply Voltage: 12 volts
t370xw01
1- U22 RAM; causes frostbite in the image.
2- U21 AUO016K1; causes various display problems or no video failure. for example "freezing-silent-recovery when warming-horizontal vertical lines".
3- U301 BD8156EFV DCDC CONVERTER; It produces the voltages required by the panel by regulating 12 volts. If this IC is faulty, tcon will not work.
4- Q304 RSS085: causes no video failure.
T315XW01
Supply Voltage: 12 volts
t315xw01
1- U3 ADD8709: causes no display failure.
2- U11 EPROM; causes no picture or white screen malfunction.
3- U9 AUO016K1; causes various display problems or no video failure. for example "freezing-silent-recovery when warming-horizontal vertical lines".
4- U2 AAT1110 DCDC CONVERTER; It produces the voltages required by the panel by regulating 12 volts. If this IC is faulty, tcon will not work.
6870C-0011D LC260W01-A5
Supply Voltage: 12 volts
6870C-0011D
6870C-0158A
No picture white screen: No VGHM voltage, U7 (RT8901) faulty.
Supply Voltage: 5 volts
260W2C4LV1
Tcon signals and voltages
VON VGH VGON VDDG: It is between 20V and 30V.
VOFF VGL VGOFF VEEG: It is between -5V and -7V.
VDD Vlogic Vddd Dvdd: 3V3 volts, but if it is VDD25 or VDD18, it is 2V5 or 1V8.
VDA Avdd Vdda Vsource: It is between 13V and 20V.
AGND: Chassis.
BGND: Supply chassis.
GND: Chassis.
PGND: Supply chassis.
STV: Vertical Synchronization Input. It depends on the STVP signal.
STVP: Scan Driver High Voltage Output.
CPV1: Vertical Timer Signal Input. Sets the timing of the CKV1 and CKVB1 signals.
CPV2: Vertical Timer Signal Input. Sets the timing of the CKV2 and CKVB2 signals.
CPV3: Vertical Timer Signal Input. Adjusts the timing of the CKV3 and CKVB3 signals.
CKV1: Vertical Scan Driver High Voltage Output Signal.
CKV2: Vertical Scan Driver High Voltage Output Signal.
CKV3: Vertical Scan Driver High Voltage Output Signal.
CKVB1: Vertical Scan Driver High Voltage Reverse Output Signal.
CKVB2: Vertical Scan Driver High Voltage Reverse Output Signal.
CKVB3: Vertical Scan Driver High Voltage Reverse Output Signal.
CKVCS1 CKVBCS1: Signal sharing. It connects the CKV1 and CKVB1 signals together as needed.
CKVCS2 CKVBCS2: Signal sharing. It connects the CKV2 and CKVB2 signals together as needed.
CKVCS3 CKVBCS3: Signal sharing. It connects the CKV3 and CKVB3 signals together as needed.
BOOST: Main Supply Input. It depends on VMAIN.
COMP: Fault Amplifier Reference Input.
DISH: Voltage Discharge Connection. It discharges the voltage in case of supply failure.
DLY: Initial Delay Adjuster.
EN: Activates Scan Integration. It works simultaneously with DLY.
FB: Feedback Input. It has a supply of around 1V24.
GOFF: CKV is the - (negative) supply of CKVB and STVP signals.
GON: CKV is the + (positive) supply of CKVB and STVP signals.
IN: Regulator Supply Input.
LX: Switching Node.
NEG: Amplifier Reverse Input.
OE: Active-High Gate-Pulse Output Enable. I could not translate it verbatim.
OECON: Timing the OE Signal.
OUT: Adjustable Full Scale Current Output. Adjusts the voltage of the POS Input.
POS: Amplifier (Amplifier) Voltage Input.
SET: Adjustable Full Scale Current Input.
VCOM: Amplifier Voltage Output.