Technical description and composition of the THOMSON T55FSE1170 TV, type of panel and modules used. Module composition.
Composition/Specifications
THOMSON T55FSE1170
LCD TV LED T55FSE1170 | Year of manufacture: 2018
Screen diagonal: 54.6" (139 cm)
Aspect ratio: 16:9
Resolution: 1920x1080
Refresh rate: 50Hz
LED backlight: Yes, Direct LED
Support HD: 1080p Full HD
Brightness: 290 cd/m2
Contrast: 4000:1
Viewing Angle: 178°
Pixel Response Time: 6.5 ms
Progressive scan: Yes
Digital tuner: DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2
Number of channels: 799
Teletext: there is
Multimedia: MP3, MPEG4, HEVC (H.265), Xvid, MKV, JPEG
Sound stereo: there is
Sound power: 16W (2x8W)
Acoustics: two speakers
Interface: AV, HDMI x2, USB x2
Headphone jack: yes
TV weight: 13 kg
Dimensions: with stand 1242x770x250 mm
without stand 1242x729x80 mm
AC power consumption: 100W
Find out more...
THOMSON T55FSE1170
THOMSON LED
Model: T55FSE1170
Chassis/Version: T.MS3663S
Panel: LVF550CSDX
LED driver (backlight): integrated into PSU
PWM LED driver: OB3365RP
MOSFET LED driver: MDF13N50
Power Supply (PSU): SHG6004C-101H
PWM Power: FA1A60N, FA6B20N
MOSFET Power: MMD60R580Q
MainBoard: T.MS3663S.782 1MS663E0S2A
MainBoard IC: CPU, SPI Flash, AUDIO, DC/DC
MainBoard: CDT-9NT372-RF01 & SAT
General advice about LCD LED TV repair
Possible problems
- THOMSON T55FSE1170 TV set doesn't turn on at all. No reaction to remote control or front panel controls. No indicator light is on or is not blinking.
In such cases the SHG6004C-101H power supply is usually the defective one. It is necessary to measure its output voltages, and if there are no such voltages, check the condition of the power switches (MMD60R580Q) of the converters and the rectifier diodes for possible short circuits.
At breakdowns in the secondary circuits of the inverter, usually it can crash in the short-circuit mode, and at short circuit in the power elements of the primary circuit most often the mains fuse or current sensor in the source of the key breaks.
Breakdown of Mos-Fet switches used in pulse sources is often caused by failures of other elements, for example, in PWM controller power supply circuit, in frequency-retaining or damping circuits, as well as in the Negative Feedback Stabilization. PWM microcircuits FA1A60N, FA6B20N are usually checked by replacement with the new ones, or known to be in good condition.
- No picture, but there is sound and reaction to the remote control. Or the image may appear for a second immediately after turning on.
In some of these cases the malfunction is caused by the lack of display backlighting. The cause may sometimes be in the power supply of LEDs, but more often in their failure (breakdown or breakage), sometimes in violation of the contact connections of LED strips.
When trying to identify breaks in the LED strips, you should keep in mind that it is difficult to do without disassembling the panel. You need, for example, a current source to open the PN-junctions connected in series.
If THOMSON T55FSE1170 has no picture but sound, often the LVF550CSDX display backlight simply does not work. Moreover, in LED televisions, the LEDs inside the panel usually fail, less often the LED driver.
In such cases you can see a faintly visible image when external light hits the screen.
To replace the LEDs requires disassembly of the LCD panel LVF550CSDX - a process which requires a master of experience and skill. We do not recommend to perform such works by yourself to owners of TV sets and craftsmen who have no experience in LCD panel repair
READ HOW TO REPAIR THE TV LED BACKLIGHT --------------> HERE.
If there is no image, but the backlight works - the screen becomes slightly lighter when you turn it on, and you can see the light through the holes in the body of the panel when the TV is open.
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 T.MS3663S.782 is defective, and so is the software.
Then first it is necessary to check the panel power supply voltage, the 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, you need to trace with an oscilloscope the LVDS signals from MainBoard T.MS3663S.782, as well as synchronizing signals to driver stubs.
Filled or unsuccessfully washed LED TV screens can be repaired in about half of the cases, usually if there is no significant damage to the panel stubs and slats.
- Front panel LED blinks, TV set does not turn on, remote control is unresponsive.
Repair or diagnostic of the T.MS3663S.782 motherboard should begin with checking the stabilizers and power converters necessary to power the chips and matrix. If necessary, software (software) should be updated or replaced. Sometimes elements of MainBoard - CPU, SPI Flash, AUDIO, DC/DC need checking or replacement (if necessary). In cases where a BGA processor is used, its failure is usually detected by local heating method.
If you cannot tune to the terrestrial or cable TV channels, make sure the software is correct, and the supply voltages on the CDT-9NT372-RF01 & SAT tuner pins are correct. It is also necessary to control with an oscilloscope the presence of pulses of data exchange between the tuner and the processor via the I2C bus.
Remember! Attempts to repair your THOMSON T55FSE1170 TV set yourself, if you do not have the necessary skills and experience, is categorically not recommended and is fraught with negative consequences, up to the complete unrepairability of the device!
Refinement after repair of the backlight. SHG6004C-101H, OB3365RP. Information from the master.
Reduce backlight current from 410 mA to 250 mA - On the SHG6004C-101H board on pin 2 of ISET chip OB3365RP in parallel resistors R229 47 kOhm and R239 68 kOhm. Removed 68 kOhm resistor.
Driver current limitation. OB3365RP.
General info.
To reduce the backlight current you can remove one of the resistors on pin 2 of the ISET chip OB3365RP, so that their total resistance increases in proportion to the reduced current in the LEDs.
More on MainBoard Repair
The appearance of the MainBoard T.MS3663S.782 is shown in the figure below:
T.MS3663S.782
MainBoard Appearance
SHG6004C-101H:
SHG6004C-101H
Main features of THOMSON T55FSE1170:
LVF550CSDX matrix (LED panel) is installed.
To power the LED backlight used converter, combined with a power supply, controlled by a PWM controller OB3365RP. MDF13N50 type switches are used as power elements of LED-driver.
Forming of necessary power supply voltages for all THOMSON T55FSE1170 TV set components is performed by the SHG6004C-101H power module or its analogues with the use of FA1A60N, FA6B20N chips and MMD60R580Q type power keys.
MainBoard - the main board (motherboard) is a module T.MS3663S.782, with the use of chips CPU, SPI Flash, AUDIO, DC / DC, and others.
The CDT-9NT372-RF01 & SAT tuner provides TV program reception and channel tuning.
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 |
THOMSON T55FSE1170 LED TV with LVF550CSDX LCD display, measuring 54.6" (139 cm) diagonally in 16:9 aspect ratio. 290 cd/m² of claimed brightness is provided by an advanced LED backlight with a maximum brightness to minimum brightness ratio (contrast ratio) of at least 4000:1. In the LCD-panel uses direct backlighting with a back arrangement of LEDs - Direct LED.
LVF550CSDX matrix and MainBoard T.MS3663S.782 software implement an image in high quality HD with 1920x1080 pixels resolution in 1080p (Full HD) graphic decomposition. Supports multimedia formats: MP3, MPEG4, HEVC (H.265), Xvid, MKV, JPEG.
The sound system capacity of 16 W (2x8 W) is provided by two speakers. NICAM stereo processing system and Sound Surround surround sound function are used.
External interface (connection with other devices) is supported by standard input and output connectors: antenna input (RF), AV, HDMI x2, USB x2. There is a headphone jack. The digital tuner has DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2 standards.
The power consumed by the TV in mains mode is 100 watts. SHG6004C-101H power supply.
Overall dimensions: with stand 1242x770x250 mm, without stand 1242x729x80 mm.
The TV weight is 13 kg.
Warning. The panel on the LVF550CSDX LED TV THOMSON T55FSE1170 is an expensive and fragile 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.
