Technical description and composition of the SAMSUNG T24D310EX TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: T24D310EX
Chassis / Version: CP01
Panel: V236BJ1-LE2 REV.C5
T-CON: V236BJ1-XCE2; CM1801B, CM501, CM601
LED driver (backlight): integrated into PSU; 35.5V 200mA
PWM LED driver: BD93941FP
MOSFET LED driver: 9997GH
Power Supply (PSU): BN44-00746A L23S0D_EPN
PWM Power: 3S111 (analog SSC1S311)
MainBoard: BN41-02105A BN94-07792R
IC MainBoard: K482G1646Q, F59L1G81A-25T, 25Q40, 24C256, NTP7414
Tuner: BN40-00287A DTOS40EIL276A
Technical Specifications T24D310EX
SAMSUNG T24D310EX
General repair guidelines for TV LCD LED
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when it is turned on, there is a certain chance that the BN44-00746A L23S0D_EPN power supply module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of standby power. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power key (s) of the KP8N60 converter. The complete inoperability of the power supply unit can be caused by a short circuit of the power elements in the primary circuit, followed by an open fuse, or a short circuit in the loads.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the 3S111 PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the SAMSUNG T24D310EX has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the V236BJ1-LE2 REV.C5 panel, or their power converter - LED driver. Sometimes, when turned on, the image appears and immediately disappears. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the backlight unit.
In case of breaks in the LED circuit, a complete disassembly of the panel is required, the LEDs are checked for breakage, as well as the reliability of the connections in the connectors and the rations of the terminals.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts is required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
If the motherboard BN41-02105A BN94-07792R is faulty, first of all it is necessary to check all the linear stabilizers and power converters of its chips, and also, if necessary, update the software (software). Sometimes you can check the health of MB only by replacement.
In some cases, they require checking or replacing (if necessary) the elements of the MB board (SSB) - K482G1646Q, 25Q40, 24C256,. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner BN40-00287A DTOS40EIL276A. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention! For users and owners of T24D310EX TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
The appearance of the MainBoard BN41-02105A is shown in the figure below:BN41-02105A
BN41-02105A can be used in TVs:
SAMSUNG T24D310EX (Panel V236BJ1-LE2 REV.C5), SAMSUNG UE28H4000AK (Panel HH028AAGH-R1), SAMSUNG T28D310EX (Panel HH028AGH-R2), SAMSUNG UE22H5000 UE22H5000AK (Panel MG28HT28) UE28J4100AK UE28J4100A (Panel HH028AGH-R2 ST2751A02-1).
The appearance of the power supply
Main features of the SAMSUNG T24D310EX device:
Installed matrix (LED-panel) V236BJ1-LE2 REV.C5.
The matrix control uses the Timing Controller (T-CON) V236BJ1-XCE2 ;.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a BD93941FP PWM controller. As power elements of the LED driver, keys of the type 9997GH are used.
The formation of the necessary supply voltages for all nodes of the SAMSUNG T24D310EX TV is carried out by the BN44-00746A power module, or its analogs using 3S111 chips (analog SSC1S311).
MainBoard - the main board (motherboard) is a module BN41-02105A, using microchips K482G1646Q, F59L1G81A-25T, 25Q40, 24C256, NTP7414 and others.
Tuner BN40-00287A DTOS40EIL276A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V236BJ1-LE2
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 521.471x293.184 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V