Technical description and composition of the SAMSUNG UE32M4000AU TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE32M4000AU
Chassis / Version: XA02
Panel: CY-JM032AGHR2V
LED backlight: LM41-00419A 2017_SVS32_HD_FCOM 5LEDS_REV1.1_170322
T-CON: ST3151A05-E-XC-2
LED driver (backlight): integrated into MainBoard
PWM LED driver: BD9413F
Power Supply (PSU): Adapter 19V
MainBoard: BN41-02582B BN94-12232R
IC MainBoard: CPU: SENK20-MS, NAND ESTM NT17L 2M
Tuner: BN37-00013A
Control: IR: BN41-02477A BN96-38694E REV 2.3
Technical Specifications UE32M4000AU
SAMSUNG UE32M4000AU
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE32M4000AU does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Often in such cases, the Adapter power module is faulty.
The external adapter power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and a short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-02582B motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, you should update or replace the software (software). When repairing an MB board, you need to check its CPU components: SENK20-MS, NAND ESTM NT17L 2M. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Before changing the tuner BN37-00013A, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention to users! Self-repair of a SAMSUNG UE32M4000AU TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard BN41-02582B is shown in the figure below:BN41-02582B
Main features of the SAMSUNG UE32M4000AU device:
Installed matrix (LED-panel) CY-JM032AGHR2V.
The matrix control uses the Timing Controller (T-CON) ST3151A05-E-XC-2.
To power the backlight LEDs, a converter is used, combined with the main board BN41-02582B, controlled by the BD9413F PWM controller.
To power all internal nodes of the SAMSUNG UE32M4000AU TV, an external adapter 19V type source is used.
MainBoard - the main board (motherboard) is a BN41-02582B module using CPU chips: SENK20-MS, NAND ESTM NT17L 2M and others.
The tuner BN37-00013A provides the reception of television programs and tuning to channels