Composition
Specifications
THOMSON T24D16DH-02B
LCD TV LED T24D16DH-02B | Year of manufacture: 2017
Screen diagonal: 24" (61 cm)
Screen Format: 16:9
Resolution: 1366x768
Refresh rate: 50Hz
LED backlight: Yes, Direct LED
Support HD: 720p HD
Brightness: 180 cd/m2
Contrast: 3000:1
Viewing Angle: 176°
Pixel Response Time: 6.5 ms
Progressive scan: Yes
Digital tuner: DVB-T, DVB-T2, DVB-C
Number of channels: 799
Teletext: there is
Multimedia: MP3, MPEG4, HEVC (H.265), Xvid, MKV, JPEG
Sound stereo: there is
Sound power: 6W (2x3W)
Acoustics: two speakers
Interface: VGA, HDMI, USB
Headphone jack: yes
TV weight: 2.65 kg
Dimensions: with stand 553x380x134 mm
without stand 553x332x82 mm
Find out more...
THOMSON T24D16DH-02B
THOMSON LED
Model: T24D16DH-02B
Chassis/Version: TP.MS3463S.PA583
Panel: LVW240CMDX E5 V12
LED backlight: 3030 6V
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP3398A
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-252
MainBoard: TP.MS3463S.PA583
IC MainBoard: SPI FLASH: GD25Q64
TP: CDT-9NT372-RF01
General advice about LCD LED TV repair
Possible trouble spots
- THOMSON T24D16DH-02B TV set does not turn on, does not respond to the remote control and control panel buttons, does not shine or blink indicators.
In these cases the AC/DC converter which is integrated to the main board TP.MS3463S.PA583 is often at fault. You should measure its output voltages, and if they are not, check the condition of the power switches (TO-252) of the converters and the rectifier diodes for possible short circuits.
If there is a breakdown in the secondary circuits of the inverter, it can usually fail in the short-circuit mode, and a short in the power elements of the primary circuit most often breaks the mains fuse or current sensor in the source of the key.
Breakdown of power switches (MosFet) in pulse sources, sometimes caused by faults in other circuit elements, for example, in the circuits that feed the PWM controller, frequency-retaining or damping circuits, as well as in the negative feedback (negative feedback) stabilization circuits. PWM regulators (PWM) PWM SOT23-6, if they do not have visible case damage and outright short circuits between pins, are usually checked by replacement.
- No image, the screen is black, there is sound, with external screen illumination you can sometimes see faintly visible outlines of the image.
Usually in such cases there is no backlight of the LED panel (matrix). The reason for this may be a breakage in the circuit LED 3030 6V, or a problem in stabilizing their power.
To check the LED arrays for breakage without disassembling the panel you can, for example, use a power supply. It is not possible to open the series connected PN-junctions with a simple multimeter, you will need a voltage of about several tens of volts.
If the THOMSON T24D16DH-02B has no picture but has sound, often the LVW240CMDX E5 V12 display backlight is just not working. Moreover, in LED TVs usually fail LEDs inside the panel, less often the LED driver.
In such cases, you can see a barely noticeable image when external light hits the screen.
To replace the LEDs requires disassembly of the LCD panel LVW240CMDX - a process which requires a master of experience and skill. It is not recommended 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 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 TP.MS3463S.PA583 is defective, so software defects are also possible.
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 by oscilloscope the LVDS signals from MainBoard TP.MS3463S.PA583, as well as synchronizing signals to driver stubs.
Filled or badly washed LED TV screens can be repaired in about half of the cases, usually, if there is no significant damage in the cables and panel bars.
- The TV set doesn't go into the operating mode, the remote control doesn't respond. Front panel indicator glows constantly or blinks.
Repair or diagnostic of the TP.MS3463S.PA583 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and the matrix. If necessary you should update or replace the software (firmware). Complex repair of MB board (SSB) in some cases is possible and practiced by repairers. To do this you should check and if necessary replace SPI FLASH elements: GD25Q64. BGA chips failures are usually easy to detect by heating method.
If there is no TV channel reception, but the TV set is working properly from external devices, first of all you should check the CDT-9NT372-RF01 tuner supply voltage and update the software. It is necessary to control the data exchange impulses via I2C bus with the help of oscilloscope.
Once again I remind users! The attempts to repair THOMSON T24D16DH-02B TV without proper qualification and necessary experience may result in its complete unrepairability!
After repair of TP.MS3463S.PA583, MP3398A backlight. Information from the master.
Decrease backlight current from 280 mA to 210 mA - I installed one 18 kOhm instead of two parallel connected 15 kOhm and 100 kOhm resistors on pin 6 of MP3398A ISET chip.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TP.MS3463.PA583 Power supply. schematic.
Current limitation. TP.MS3463S.PA583, MP3398A. General advice.
To reduce the backlighting current in TV's with the TP.MS3463S.PA583 board and the MP3398A controller you should increase the total resistance of the resistors in proportion to the case on pin 6 of the MP3398A ISET controller.
The resistors in the diagram are labeled RB812, RB813, RB822.
Inverse proportion formula for backlight current in milliamps and resistance Rset in kiloohms:
I[mA]=988/Rset[kOhm].
TP.MS3463S.PA583 current backlight
A pdf document is included.---------------> MP3398A.
Ways to limit the current in LED backlight drivers:
There
is a lot of information on the Internet about ways to limit the current
in the LED backlighting for different TVs and LED drivers. A lot of it
is written plausibly but sometimes it is written by people far from
electronics in order to publish any popular content on hot topics to
boost web-sites ratings.
It's impossible to talk about each case
separately within one article, because even similar models may have
different panels and different boards with their own driver variants.
But there are basic principles that are clear to craftsmen with even minimal knowledge and skill.
Other popular, complex and controversial current limit cases will be published as information becomes available.
There are three basic ways to reduce the backlight current.
1. By increasing the resistance of the LED current sensor - a low-resistance measuring resistor in the cathode (LED-) circuit.
2. Increasing the ratings of the resistors on the ISET (current setting) input of the LED driver chip.
3. changing the resistor ratings in the divider on the ADIM (Dimming) control input.
The fundamental difference between input ISET and ADIM is that ISET - input inverted, as FB, and ADIM - direct.
More on MainBoard repair
The MainBoard TP.MS3463S.PA583 is shown in the figure below:
TP.MS3463S.PA583
The main features of THOMSON T24D16DH-02B:
LVW240CMDX E5 V12 matrix (LED panel) is installed.
To power the LED backlight using a converter, combined with the main board TP.MS3463S.PA583, controlled by the PWM controller MP3398A. As power elements of the LED driver are used as TO-252-type switches.
The power module is combined with MainBoard and is designed as reverse-going AC/DC converter with PWM SOT23-6 chips and TO-252 type power switches.
MainBoard - the main board (motherboard) is a TP.MS3463S.PA583 module, using SPI FLASH: GD25Q64 and other microcircuits.
The CDT-9NT372-RF01 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 T24D16DH-02B LED TV with LVW240CMDX LCD screen measuring 24" (61 cm) diagonally in 16:9 aspect ratio. Claimed 180 cd/m² brightness is provided by an advanced LED backlight and has a maximum brightness to minimum contrast ratio of at least 3000:1. The LCD panel uses direct backlighting with Direct LED backlighting.
LVW240CMDX matrix and MainBoard software TP.MS3463S.PA583 realize HD image quality with 1366x768 pixels resolution in 720p (HD Ready) graphic resolution. Supports multimedia formats: MP3, MPEG4, HEVC (H.265), Xvid, MKV, JPEG.
The speaker system has 6W (2x3W) sound power provided by two speakers. NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), VGA, HDMI, USB. There is a jack for headphones. The digital tuner receives DVB-T, DVB-T2, DVB-C TV channels.
The power supply is used as a part of MainBoard.
Dimensions: with stand 553x380x134 mm, without stand 553x332x82 mm.
TV weight: 2.65kg.
Warning. The LVW240CMDX E5 V12 LED TV THOMSON T24D16DH-02B is an expensive and fragile part of the TV.
Avoid any kind of impact on the glass and pressure on the surface of the screen to avoid damage to 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.
