Technical description and composition of the THOMSON T40D17SF-01B TV, type of panel and modules used. Module composition.
Composition
Specifications
THOMSON T40D17SF-01B
LCD TV LED T40D17SF-01B | Year of manufacture: 2015
Screen diagonal: 40" (102 cm)
Display format: 16:9
Resolution: 1920x1080
Frequency refresh rate: 50 Hz
LED backlight: Yes, Direct LED
Support HD: 1080p Full HD
Brightness: 220 cd/m2
Contrast: 3000:1
Viewing Angle: 178°
Pixel Response Time: 6.5 ms
Progressive scan: Yes
TV Standards: PAL, SECAM, NTSC
Digital tuner: DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2
Number of channels: 5199
Teletext: there is
DTV formats: 480i, 480p, 576i, 576p, 720p, 1080i, 1080p
Multimedia: MP3, MPEG4, JPEG
Stereo sound: there is
Sound Power: 10W (2x5W)
Acoustics: two speakers
Interface: AV, component, SCART, VGA, HDMI x3, MHL, USB
Headphone jack: yes
TV weight: with stand: 11.1 kg
without stand: 8.9 kg
Dimensions: with stand 929x598x185mm
without stand 929x550x87mm
AC Consumption: 75W.
THOMSON LED
Model: T40D17SF-01B
Chassis/Version: TP.S512.PB83
Panel: LVF400SSDE E2 V2
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN51DP
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: N-FET TO-220F
MainBoard: TP.S512.PB83
IC MainBoard: CPU: S2T512, SPI Flash: GD25Q64B, Audio: TPA3110LD2
TPBoard: XF-3SDT-H, RT710 (SAT)
General recommendations for LCD LED TV repair
Possible defects
- THOMSON T40D17SF-01B TV set doesn't turn on. There are no any signs of it working. The indicators on the front panel don't glow or flash, the TV does not respond to the control buttons.
In this case the problem may be the main switching power supply - AC/DC converter, the elements of which are located on the main board MainBoard TP.S512.PB83. It is then necessary to measure its output voltages and, if not, check the power switches (N-FET TO-220F) and rectifier diodes of the converters for possible short circuits.
At breakdown of semiconductors in the secondary circuits of any converter, as a rule, it can operate in the emergency short-circuit mode without output voltages, and at short circuit in the elements of the primary circuit most often immediately burst the mains fuse and more rarely the current sensor at the source of the key.
Mos-Fet switches used in switched-mode power supplies usually fail due to the failure of other elements, which can take it out of key mode, or cause it to exceed the maximum current or voltage. These may be the circuits feeding the PWM controller, the damping or frequency-retaining circuits, or the negative feedback elements in the stabilization circuit. PWM controllers (PWM) PWM SOT23-6, if there is no external damage and short circuit between the pins, are checked by replacing with known good ones.
- No picture, but there is sound and reaction to remote control commands. Or the image appears just after switching on and disappears.
As a rule, in this case it turns out the LED panel backlight is defective. More often the reason for this is a breakage of LEDs, or poor contact in the connectors of the boards, less often faulty can be the LED-driver.
When diagnosing you should take into account that it is impossible to check the breakage in the circuit of LED strips without disassembling the panel, using a tester or multimeter. To open all the PN-junctions connected in series, you will need a voltage of about several tens of volts, and ideally - a current source. After opening the panel, you can check each LED separately. Typically, Chinese multimeters will light up a single 3 volt LED slightly if you connect the probes to it in a forward direction. For twin 6 volt LEDs, the PN junction of its fault stabilizer can be a good indicator. If the LED is faulty, it will either be broken or shorted.
If the THOMSON T40D17SF-01B has no picture but has sound, often the display backlight simply does not work. Moreover, in LED TVs usually fail the LEDs inside the panel, less often the LED-driver.
In such cases, you can see a barely noticeable image when external lighting hits the screen.
To replace the LEDs requires disassembly of the LCD-panel - a process that requires a master of experience and expertise. Do not perform such work by yourself to owners of TV sets and masters who have no experience in LCD panel repair.
READ HOW TO REPAIR THE TV LED BACKLIGHT --------------> HERE.
If there is no image, but backlighting is working, the screen becomes a little lighter when the TV is turned on, and in the open TV you can see the light through the holes in the body of the panel.
In this case the panel may be defective - damage to the strips, cables, for example, as a consequence of moisture after an unsuccessful washing of the screen, the T-CON board (Timing Controller) may be defective. But quite often the MainBoard is defective as well, and software failure is also possible.
Then first it is necessary to check the panel power supply voltage, fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, it is necessary to trace by oscilloscope the LVDS signals from MainBoard, as well as synchronizing signals to the driver stubs.
Filled or unsuccessfully washed LED TV screens can be restored in about half of the cases, usually, if there is no significant damage in the cables and panel bars.
- The TV does not turn on, the LED indicates standby or operation mode, or blinks.
Repair or diagnostic of the TP.S512.PB83 motherboard should begin with checking the stabilizers and power converters necessary to power the chips and matrix. Software (software) should be updated or replaced if necessary. Sometimes elements of MainBoard must be checked or replaced (if necessary) - CPU: S2T512, SPI Flash: GD25Q64B, Audio: TPA3110LD2. If a BGA processor is used, its malfunction is usually found by heating it locally.
If there is no TV channel reception, but the TV set is working properly from external devices, first of all you should check the tuner XF-3SDT-H, RT710 (SAT) power supply voltage and update the software. Check the I2C bus communication pulses with an oscilloscope.
Attention TV owners! The attempts to repair THOMSON T40D17SF-01B by yourself are not recommended by the manufacturer and can cause serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Main TP.S512.PB83
After repair of backlight LVF400SSDE, TP.S512.PB83, SN510P. Information from the master.
Decrease backlight current from 340 mA to 260 mA - removed one 1.6 Ohm resistor in the driver current sensor on the TP.S512.PB83 board.
Backlight driver current limitation. TP.S512.PB83, SN51DP. General advice.
To reduce the backlight current in the LED drivers with the SN51DP (SN510P) PWM controller, you can proportionally increase the resistance of the low resistance measuring resistors of the backlight current sensor in the LED circuit.
On the TP.S512.PB83 board, these are the RB837-RB841 resistors next to the EB801, EB802, EB803 capacitors.
TP.S512.PB83 current backlight
More on MainBoard repairs
The MainBoard TP.S512.PB83 is shown in the picture below:
TP.S512.PB83
TP.S512.PB83 may be used in televisions:
AKAI LEA-39V51P (Panel LC390TA2A 902-P05-390H ), DEXP 40A7000 (Panel C400F13-E2-C), DEXP F39B7100E (Panel T390HVN04.0 CX390DLEDM), DEXP H32B7000C (Panel T320XVN02.9 C320X14-E2-A), DEXP F42B7000ED (Panel CX420DLEDM), DEXP F32C7000B (Panel BOEI320WU1), DEXP F32C7100B/W F32C7100 (Panel BOEI320WU1), DEXP 32A7000 (Panel BOEI320WU1), DEXP 42A7000 (Panel CX420DLEDM), DEXP F32B7000B (Panel BOEI320WU1), DEXP H39D7000E (Panel CX390DLEDM), DEXP F40B7000C (Panel C400F13-E2-C), DEXP H32B3200CD (Panel HV320WX2-201), HAIER LE28F6000T (Panel A275HD1A01-2 / LVW280CSDO E2 V2), HAIER LE32F6000T (Panel ST3151A05-8 LVW320CSDX E13 V2), MYSTERY MTV-4025LT2 (Panel CX400DLEDM), SHIVAKI STV-32LED13 (Panel SV320SHD PDL320TU2A X41), SHIVAKI STV-42LED16 (Panel V420HJ-P01), SHIVAKI STV-32LED14 (Panel CX315DLEDM AJ32TO3), SHIVAKI STV-40LED13W (Panel V400HJ6PE1-C2), SHIVAKI STV-32LED15 (Panel HV320WHB-N80), SUPRA STV-LC32T440WL (Panel C320X14-E13-H), SUPRA STV-LC32T900WL (Panel LC320TU3A), SUPRA STV-LC40T900FL (Panel 1080p Full HD 1920x1080), THOMSON T32D15DH-01B (Panel LVW320CSDX E13 V30), THOMSON T28D15DH-01B (Panel LVW280CSDE E3 V5), THOMSON T32D16DH-01W T32D16DH (Panel LVW320CSDX E19 V28), THOMSON T43D16SF-01B T43D16SF (Panel LVF430LGDO E2 V18).
PWM SMPS in SOT-23-6, SOT-26, TSOP-6 packages
In
the circuitry of modern switching power supplies (SMPS), PWM
controllers made in small-sized planar packages with six terminals have
gained wide popularity. The enclosure type designation can be SOT-23-6,
SOT-23-6L, SOT-26, TSOP-6, SSOT-6. The appearance and arrangement of the
pins are shown in the figure below. In this case, the code marking
LD7530A is shown on the left fragment of the picture.
Pin assignment:
1 - GND. (Common wire).
2
- FB. (FeedBack - Feedback). Input for controlling the duration of
pulses with a signal from the output voltage. Sometimes it can be
labeled COMP (input comparator).
3 - RI / RT / CT / COMP / NC -
Depending on the type of microcircuit, it can be used for a
frequency-setting RC circuit (RI / RT / CT), or for organizing
protection, as an input of a PWM trip comparator at a threshold value at
its input, specified in the document. In some types of microcircuits,
this input may not be used in any way (NC - No Connect).
4 - SENSE, otherwise CS (Current Sense) - Input from the current sensor at the source of the key.
5 - VCC - Input voltage supply and start of the microcircuit.
6 - OUT (GATE) - Output for controlling the gate (Gate) of the key.
Functionally,
these regulators work on the principle of the previously popular xx384x
PWM microcircuits, which have proven themselves well in terms of
reliability and stability.
Some difficulties often arise when
replacing or choosing an analog for such PWM regulators due to the use
of code markings in the designation of the type of microcircuits. The
situation is complicated by a large number of component manufacturers
who do not always provide documentation to the mass access, just as not
all manufacturers of finished devices supply repair service centers with
diagrams, so repairmen often have to study real circuit solutions by
installed components and wiring connections directly on the board.
In
practice, PWM microcircuits and the marking code EAxxx and Eaxxx are
often found. Official documentation for them was not found in the public
domain, but discussions on the forums and pieces of pictures from PDF
from System General, which publishes them as SG6848T and SG6848T2, have
survived. The drawing is here placed left .
For the attention of the masters, here below are PDF datasheet tables
compiled from information available on the Internet and PDF documents
for the selection of analogues types when replacing the most common
six-legged planar PWM with pinout pins: pin1 - GND, pin2 - FB (COMP),
pin4 - Sense, pin5 - Vcc, pin6 - OUT ...
Their main difference is the application and purpose of pin 3.
| Name | Part Number | Fabricant | Marking |
|---|---|---|---|
| SG6849 | SG684965TZ | Fairchild / ON Semi | BBxx |
| SG6849 | SG6849-65T, SG6849-65TZ | System General | MBxx EBxx |
| SGP400 | SGP400TZ | System General | AAKxx |
PWM controllers (PWM) with a 95-100 kOhm resistor on pin 3.
When
applying the PWM listed below, the frequency should be set with the RT
(RI) resistor from pin 3 to ground. Usually its nominal value is chosen
95-100 kOhm for a frequency of 65-100 KHz. For more details, see the
here below attached documentation. PDF files are packed in RAR.
| Name | Part Number | Fabricant | Marking |
|---|---|---|---|
| AP3103A | AP3103AKTR-G1 | Diodes Incorporated | GHL |
| AP8263 | AP8263E6R, A8263E6VR | AiT Semiconductor | S1xx |
| AT3263 | AT3263S6 | ATC Technology | 3263 |
| CR6848 | CR6848S | Chip-Rail | 848H16 |
| CR6850 | CR6850S | Chip-Rail | 850xx |
| CR6851 | CR6851S | Chip-Rail | 851xx |
| FAN6602R | FAN6602RM6X | Fairchild / ON Semi | ACCxx |
| FS6830 | FS6830 | FirstSemi | |
| GR8830 | GR8830CG | Grenergy | 30xx |
| GR8836 | GR8836C, GR8836CG | Grenergy | 36xx |
| H6849 | H6849NF | HI-SINCERITY | |
| H6850 | H6850NF | HI-SINCERITY | |
| HT2263 | HT2263MP | HOT-CHIP | 63xxx |
| KP201 | Kiwi Instruments | ||
| LD5530 | LD5530GL LD5530R | Leadtrand | xxt30 xxt30R |
| LD7531 | LD7531GL, LD7531PL | Leadtrend | xxP31 |
| LD7531A | LD7531AGL | Leadtrend | xxP31A |
| LD7535/A | LD7535BL, LD7535GL, LD7535ABL, LD7535AGL | Leadtrend | xxP35-xxx35A |
| LD7550 | LD7550BL, LD7550IL | Leadtrend | xxP50 |
| LD7550B | LD7550BBL, LD7550BIL | Leadtrend | xxP50B |
| LD7551 | LD7551BL/IL | Leadtrend | xxP51 |
| LD7551C | LD7551CGL | Leadtrend | xxP51C |
| NX1049 | XN1049TP | Xian-Innuovo | 49xxx |
| OB2262 | OB2262MP | On-Bright-Electronics | 62xx |
| OB2263 | OB2263MP | On-Bright-Electronics | 63xx |
| PT4201 | PT4201E23F | Powtech | 4201 |
| R7731 | R7731GE/PE | Richtek | 0Q= |
| R7731A | R7731AGE | Richtek | IDP=xx |
| SD4870 | SD4870TR | Silan Microelectronics | 4870 |
| SF1530 | SF1530LGT | SiFirst | 30xxx |
| SG5701 | SG5701TZ | System General | AAExx |
| SG6848 | SG6848T, SG6848T1, SG6848TZ1, SG6848T2 | Fairchild / ON Semi | AAHxx EAxxx |
| SG6858 | SG6858TZ | Fairchild / ON Semi | AAIxx |
| SG6859A | SG6859ATZ, SG6859ATY | Fairchild / ON Semi | AAJFxx |
| SG6859 | SG6859TZ | Fairchild / ON Semi | AAJMxx |
| SG6860 | SG6860TY | Fairchild | AAQxx |
| SP6850 | SP6850S26RG | Sporton Lab | 850xx |
| SP6853 | SP6853S26RGB, SP6853S26RG | Sporton Lab | 853xx |
| SW2263 | SW2263MP | SamWin | |
| UC3863/G | UC3863G-AG6-R | Unisonic Technologies Co | U863 U863G |
| XN1049 | XN1049, XN1049TP | Innuovo Microelectronics | 49 xxx |
PWM controllers that use pin 3 differently.
When
using the following PWM (PWM controllers), you should pay attention to
pin 3, which can be used to organize protection - thermal or from
overvoltage of the input voltage.
The frequency can be fixed at 65kHz, or set by the value of the capacitor at pin 3.
When replacing any microcircuits with analogs, carefully study the documentation. PDF files are packed in a RAR archive.
| Name | Part Number | Fabricant | Marking |
|---|---|---|---|
| AP3105/V/L/R | AP3105KTR-G1, AP3105VKTR-G1, AP3105LKTR-G1, AP3105RKTR-G1 | Diodes Incorporated | GHN GHO GHP GHQ |
| AP3105NA/NV/NL/NR | AP3105NAKTR-G1, AP3105NVKTR-G1, AP3105NLKTR-G1, AP3105NRKTR-G1 | Diodes Incorporated | GKN GKO GKP GKQ |
| AP3125A/V/L/R | AP3125AKTR-G1, AP3125VKTR-G1, AP3125LKTR-G1, AP3125RKTR-G1 | Diodes Incorporated | GLS GLU GNB GNC |
| AP3125B | AP3125BKTR-G1 | Diodes Incorporated | GLV |
| AP3125HA/HB | AP3125HAKTR-G1, AP3125HBKTR-G1 | Diodes Incorporated | GNP GNQ |
| AP31261 | AP31261KTR-G1 | Diodes Incorporated | GPE |
| AP3127/H | AP3127KTR-G1, AP3127HKTR-G1 | Diodes Incorporated | GPH GSH |
| AP3301 | AP3301K6TR-G1 | Diodes Incorporated | GTC |
| FAN6862 | FAN6862TY | Fairchild / ON Semi | ABDxx |
| FAN6863 | FAN6863TY, FAN6863LTY, FAN6863RTY | Fairchild / ON Semi | ABRxx |
| HT2273 | HT2273TP | HOT-CHIP | 73xxx |
| LD7510/J | LD7510GL, LD7510JGL | Leadtrend | xxP10 xxP10J |
| LD7530/A | LD7530PL, LD7530GL, LD7530APL, LD7530AGL | Leadtrend | xxP30 xxxP30A |
| LD7532 | LD7532GL | Leadtrend | xxP32 |
| LD7532A | LD7532AGL | Leadtrend | xxP32A |
| LD7532H | LD7532HGL | Leadtrend | xxP32H |
| LD7533 | LD7533GL | Leadtrend | xxP33 |
| LD7536 | LD7536GL | Leadtrend | xxP36 |
| LD7536R | LD7536RGL | Leadtrend | xxP36R |
| LD7537R | LD7537RGL | Leadtrend | xxP37R |
| LD7539C GL | LD7539C GL | Leadtrend | xxP39C |
| ME8204 | ME8204M6G | MicrOne | ME8204xx |
| NCP1250 | NCP1250ASN65T1G, NCP1250BSN65T1G, NCP1250ASN100T1G, NCP1250BSN100T1G | ON Semiconductor | 25xxxx |
| NCP1251 | NCP1251ASN65T1G, NCP1251BSN65T1G, NCP1251ASN100T1G, NCP1251BSN100T1G | ON Semiconductor | 5xxxxx |
| OB2273 | OB2273MP | On-Bright-Electronics | 73xx |
| R7735 | R7735AGE, R7735HGE, R7735GGE, R7735RGE, R7735LGE | Richtek | |
| UC3873/G | UC3873-AG6-R, UC3873G-AG6-R | Unisonic Technologies | U873 U873G |
The main features of the device THOMSON T40D17SF-01B:
A matrix (LED panel) LVF400SSDE E2 V2 is installed.
To power the LED backlight using a converter, combined with the main board TP.S512.PB83, is controlled by a PWM controller SN51DP. The power elements of the LED driver are used as TO-252-type switches.
The power module is integrated into MainBoard and is designed as reverse-going AC/DC converter with PWM SOT23-6 chips and N-FET TO-220F power switches.
MainBoard - the main board (motherboard) is a TP.S512.PB83 module, which uses CPU: S2T512, SPI Flash: GD25Q64B, Audio: TPA3110LD2 and other microchips.
The XF-3SDT-H, RT710 (SAT) tuner provides TV program reception and channel tuning.
LED-TV THOMSON T40D17SF-01B with an LCD screen measuring 40" (102 cm) diagonally in 16:9 aspect ratio. The claimed brightness of the screen of 220 cd/m² is provided by modern LED backlight. Maximum brightness to minimum brightness ratio (contrast ratio) is not less than 3000:1. The LCD-panel uses direct backlighting with a rear arrangement of LEDs - Direct LED.
The design and capabilities of the TV realize a high quality HD image at a resolution of 1920x1080 pixels in 1080p (Full HD) graphic decomposition. Input high frequency or video signal is decoded in PAL, SECAM, NTSC analog systems. Digital signal (graphic format) is formed in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supports multimedia formats: MP3, MPEG4, JPEG.
The speaker system sound power of 10 W (2x5 W) is provided by two speakers. NICAM STEREO audio processing system is used.
External interface (connection with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, VGA, HDMI x3, MHL, USB. There is a headphone jack. To connect a laptop or computer uses a standard VGA connector (D-Sub 15). This interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080. The digital tuner is capable of receiving DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2.
The power consumed by the TV in the mains mode is 75 W.
Overall dimensions: with stand 929x598x185 mm, without stand 929x550x87 mm.
TV weight: with stand 11.1 kg, without stand 8.9 kg.
ATTENTION! The panel of THOMSON T40D17SF-01B LED TV is an expensive and unreliable part of the TV.
Avoid any kind of impact on the glass and pressure on the screen surface to avoid damaging the LED panel!
It is also not safe to get liquid on the screen. Sometimes one drop is enough if it drips down the glass onto the cables and the TV becomes unrepairable.
